Mx3IPG2A

7/16/2019 Mx3IPG2A

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MX3IPG2A

Multiple-Function Protection for Generator(R< - Ucc< - Ucc>)

TECHNICAL MANUAL MDE/C133 2561 001

ABCD

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MDE/C133 2561 001MX3IPG2A

CONTENTS

1. TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2. GENERAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Selecting rated values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3. OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 Underresistance protection (rotor ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Overcurrent protection (input I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.3 Undervoltage protection (diagnostics - input U) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Overvoltage protection (diagnostics - input U) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.5 Direct undervoltage protection (input Ucc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.6 Direct overvoltage protection (input Ucc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7 Main and spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4. ADDITIONAL FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94.2 Output circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.3 LED signalling circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4 Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.5 Additional timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.6 Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.7 Event logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.8 Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.9 Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.10 Alphanumeric user identifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.11 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.12 LCD settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.13 Inhibiting operation - Deconfiguration via network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.14 Serial communication on LONWORKS (TM) bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.15 RS485 serial communication and MODBUS protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.16 Fault recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.17 Checking tripping circuits for continuity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5. LOCAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6. LCD MENU STRUCTURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146.1 MAIN READING MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.1.1 Change dialogue language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146.1.2 Change date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.1.3 Display settings in use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.1.4 Display main settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.1.5 Viewing spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.1.6 Display current and stored measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.1.7 Viewing counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166.1.8 Viewing events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.1.9 Display output relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176.1.10 Viewing digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.1.11 Display LED's. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176.1.12 Viewing relay data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.1.13 Diagnostic display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.2 MAIN SETTING CHANGE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196.2.1 Select current settings group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2.2 Change main settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206.2.3 Change spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.4 Set output relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.5 Set digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.2.6 LED Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.2.7 Set alphanumeric code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.2.8 LCD back-lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.3 TEST MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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7. APPLICATION AND USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8. INSTALLATION - TRANSPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8.1 ESD Electrostatic charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238.2 Acceptance - storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238.3 Assembling and connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

9. SETTING THE UNIT AT WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

9.1 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

9.2 Checking nameplate ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249.3 Final test with gauging of the attachment X2/IPG2A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

APPENDIX A - Network data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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100

1000

10000

0 1 2 3 4 5

Capacità [microf]

S o g l i a [ O h

m ]

1. TECHNICAL DATA

This device belongs to the Modulex 3 line and digitally proc-

esses the currents and voltages injected into the rotor winding

of synchronous machines, through the use of the attachment

X2/IPG2A, to provide a rotor ground protection besides a

number of additional functions, among which are the direct

over- and undervoltage monitoring (Vaux control).

The user interface is available locally through a display unit,

and remotely, through a LONWORKS (TM) field bus with a control

and monitoring system.

It is furthermore capable of communicating with a Personal

Computer through a connector located on the relay front and

an interface programme. This feature makes it easier and

safer to programme the setting parameters and configure and

read the set values, measurements and logged events; the

programming can also be taken from previously created files.

Protective functions:

minimum resistance with two thresholds

with definite time operating characteristic

injected overcurrent with one threshold


injected undervoltage with fixed threshold

with fixed time operating characteristic

injected overvoltage with fixed thresholds

with fixed time operating characteristic

direct undervoltage with two thresholds


direct overvoltage with two thresholds


possibility of two groups of settings, namely main and

spare

Measurement functions:

resistance values stated in Ω injected current value stated in A

injected voltage value stated in V

direct voltage values stated in Un

injected overcurrent value stated in A

logging of the latest 8 events with storage of tripped

thresholds values, date, time and injected current and

direct voltage values as measured when the fault showed

up

fault recorder: recording, for 2.5 s in all, of the instant values(12 samples per period ) taken by the input quantities

(Iinjected,Vinjected,Vdirect), as well as of the 19 logical

states among which digital inputs and additional timers are

found

RCE logging: recording of the latest 32 changes of state

(with related date and time); only available through PC or via

network. .

Other functions:

selection of the setting range of the direct voltage thresh-

olds by means of internal jumpers

selection of the rated frequency between 50Hz and 60Hz

selection of dialogue language (Italian, English, French

and Spanish)

self-monitoring with detailed indication of fault and alarm

type through LED's and "normally energized" output relay

(X6)

possibility of serial communication both with a local PC or

via a LONWORKS (TM) field bus

three auxiliary timers available free for allocation to digitalinputs

possibility of assigning one or more device functions to

each output relay and LED

possibility of separately setting all output relays as "all

normally energized" or "all normally normally de-energized"

possibility of selecting, for each output relay and LED, the

monostable or bistable (hand-reset) operating mode

possibility of assigning a minimum pulse width to each

output relay

opto-insulated digital inputs programmable for lockout,

drive and reset functions, each input being enabled by

normal energizing or de-energizing. Optionally, they may be

used to supervise the tripping circuit for continuity

a partial and a total counter per trip threshold

MINIMUM RESISTANCE PROTECTION (rotor ground)

Settings

first threshold R<: 200÷4000Ω / OFFstarting signalling delay tstart: 0.00 ÷ 9.99 sdefinite time trip delay t1: 0.05 ÷ 600 s

second threshold R<<: 200÷4000Ω / OFFstarting signalling delay tstart: 0.00 ÷ 9.99 sdefinite time trip delay t2: 0.05 ÷ 600 sthreshold settings step: 1time setting step: 0.01

threshold variation as a function of variation occurring between windingand mass:

Capacity [µµµµµF]

T h r e s h o l d

[ Ω Ω Ω Ω Ω ]

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OVERCURRENT PROTECTION

measurement range: 0 ÷ 1.2 A

Settings

threshold I~>: 0.01÷0.10 A / OFF

starting signalling delay tstart: 0.00 ÷ 9.99 sdefinite time trip delay t3: 0.05 ÷ 600 sthreshold settings step: 0.001time setting step: 0.01

UNDER/OVERVOLTAGE PROTECTION (diagnostics)

undervoltage threshold : 28 Vtrip delay : 2 sovervoltage threshold : 52 Vtrip delay : 2 s

DIRECT UNDER/OVERVOLTAGE PROTECTION

rated voltage (jumper in S20) Un: 30 ÷ 300 Vrated voltage (jumper in S21) Un: 3 ÷ 30 Vrated voltage (jumper in S22) Un: 0.3 ÷ 3 Vrated voltage (jumper in S23) Un: 0.03 ÷ 0.3 Vfirst undervoltage threshold U-<: 0.5 ÷ 1.2 Un / OFF

starting signalling delay tstart: 0.00 ÷ 9.99 s

trip delay t4: 0.02 ÷ 600.00 ssecond threshold di minima tensione U-<<: 0.5 ÷ 1.2 Un / OFFstarting signalling delay tstart: 0.00 ÷ 9.99 strip delay t5: 0.02 ÷ 600.00 s

first overvoltage threshold U->>: 0.5 ÷ 1.2 Un / OFFstarting signalling delay tstart: 0.00 ÷ 9.99 strip delay t6: 0.02 ÷ 600.00 ssecond overvoltage threshold U->>: 0.5 ÷ 1.2 Un / OFFstarting signalling delay tstart: 0.00 ÷ 9.99 s

trip delay t7: 0.02 ÷ 600.00 ssettings step: 0.01

ADDITIONAL SETTINGS

rated frequency fn: 50 or 60 Hz

minimum pulse width of end relays timp: 0.02 ÷ 1 s

additional timer tX1: 0.02 ÷ 600 sadditional timer tX2: 0.02 ÷ 600 sadditional timer tX3: 0.02 ÷ 600 s

Auxiliary power supply

MX3IPG2A.11, .61 and .71 versionsUaux: 19 ÷ 100 VccUaux: 19 ÷ 72 Vca

MX3IPG2A.12, .62 and .72 versionsUaux: 64 ÷ 300 Vcc

Uaux: 64 ÷ 275 VcaX2/IPG2A attachment Uaux: 10 ÷ 315 Vcafrequency for Uaux in c.a.: 47 ÷ 63 Hzburden (minimum/maximum) in d.c.: 5 W / 10 Wburden (minimum/maximum) in a.c.: 10VA / 20VA

burden of X2/IPG2A attachment in c.a.: 5 VA

Output contact rating

rated current: 5 Abreaking power (110 Vcc; L/R= 40 ms; 105 operations): 0.3 Amake and carry for 0.5 s: 30 A

mechanical durability: 106 operations

Digital inputs

MX3IPG2A.11, .61 and .71 versionsUaux IN DIG: 19 ÷ 100 Vcc

maximum series lead resistance: 8.8 kohm

with additional external resistor, rated 4.7 kohm 2 W 30 ÷ 150 Vccwith additional external resistor rated 18 kohm 7 W

50 ÷ 300 VccMX3IPG2A.12, .62 and .72 versions

Uaux IN DIG: 64 ÷ 264 Vcc

maximum series lead resistance: 48 kohmwith additional external resistor rated 6.8 kohm 1 W 75 ÷ 300 Vcc

Errors of measuring equipment

Resistance threshold

relative error: ≤ 3 % of set value (with min. value 20 Ohm)consistency : ≤ 1 % of set value

Current threshold

relative error: ≤ 3 % of set value + 0.005 Aconsistency: ≤ 1 % of set value + 0.005 A

Voltage thresholds

relative error : ≤ 2.5% + 1 Vconsistency : ≤ 1% + 1 V

Direct voltage thresholds

relative error (selector Un: S20): ≤ 3% (minimum 1 V)(selector Un: S21): ≤ 3% (minimum 100 mV)(selector Un: S22): ≤ 3% (minimum 10 mV)

(selector Un: S23): ≤ 3% (minimum 1 mV)relative error : (selector Un: S20): ≤ 1% (minimum 1 V)

(selector Un: S21): ≤ 1% (minimum 100 mV)(selector Un: S22): ≤ 1% (minimum 10 mV)(selector Un: S23): ≤ 1% (minimum 1 mV)

Error variationas frequency varies within the range ± 5% fn

and with ≤ 5% distortion factor

Current threshold

relative error: ≤ 1 % of set value + 0.0025 A

Voltage threshold

relative error : ≤ 1% + 1 V

as temperature and Uaux vary within the operating range

Current threshold

relative error: ≤ 0.5% of set value + 0.001 A

Voltage threshold

relative error : ≤ 0.5% + 1 V

Direct voltage threshold

relative error (selector Un: S20): ≤ 0.5% (minimum 1 V)(selector Un: S21): ≤ 0.5% (minimum 100 mV)

(selector Un: S22): ≤ 0.5% (minimum 10 mV)(selector Un: S23): ≤ 0.5% (minimum 1 mV)

for asymmetric values

transient overreach: ≤ 5%

Time errors

relative error on definite times: ≤ 3% or 20 ms

consistency on definite times: ≤ 1% or 20 ms

Variation of time errors

as temperature and Uaux vary within the operating range

relative error on definite times: ≤ 0.5% or 10 ms

Other characteristics

reset ratio for maximum thresholds: > 0.95reset ratio for minimum thresholds: < 1.05

reset time: ≤ 50 msovershoot: ≤ 30 ms

Operating ranges

service temperature: -10 °C ÷ +60 °C

storage and transport temperature: -25 °C ÷ +80 °Crelative humidity: < 95% with no formation of condensatevibration: IEC255-21-1; class 2; 0.075mm 10-60Hz; 1g 60-500Hz

Weight

total: 2.5 Kg

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Protection Class

device: IP52

upon request when flush-mounted in a panel: IP66terminal board with mounted cover: IP20

Insulation

To ground and between two independent circuits whatsoever:

2 kV, 50 Hz per minute

Impulse test: 5 kV 1.2/50 µs

Electromagnetic compatibility

89/336/CEE : EN50081-2 EN50082-2 DirectiveFor industrial environments

UNIPEDE NORM(SPEC)13 "Automation and control apparatus forgenerating station and substation"

ENEL R_EMC_02 "Apparati di automazione e controllo per centrali e

stazioni elettriche".conditions of electromagnetic compatibility:IEC 1000-4-8 EN 61000-4-8 lev.5; 1000 A/m

IEC 1000-4-10 EN 61000-4-10 lev.5; 100 A/mIEC 1000-4-3 ENV 50140 lev.3; 10 V/m

77B(Sec)1 ENV 50204 lev.3; 10 V/m

IEC 1000-4-2 EN 61000-4-2 lev.4; 8kV contact;15kV air-break77A/120/CD lev.4 / 3; 300V / 10-1-1-10 V

IEC 1000-4-5 EN 61000-4-5 lev.4; 4kV 1.2/50 µsIEC 1000-4-12 EN 61000-4-12 lev.3; 2.5 kV

IEC 1000-4-4 EN 61000-4-4 lev.4; 4 kV77B/144/DIS ENV 50141 lev.3; 10 V77A(Sec)99 lev.2; 10%

IEC 1000-4-11 EN 61000-4-11 > 20 msIEC/CISPR 11 EN 55011 group 1 class A

Reference standards

CEI 95-1 EN 60255-6 IEC 255

Low voltage directive 73/23/CEE

2. GENERAL CHARACTERISTICS

The device features a mechanical casing that is 4U in height,

and as wide as to allow up to 4 pieces to be accommodated

in a 19" rack, in addition to normal flush mounting.

The casing is made of a hot-galvanized PVC-coated plate

frame inside which the moving part that carries all the elec-

tronic circuits and the local interface slides on guides. The pull-

out action is facilitated by the presence of special "handles"

which, when the device is "plugged in", are also used to lock

the two parts. The aluminium frame of the moving part renders

the latter excellently rigid.

The device-system interface terminal blocks are located on

top of the casing and, for each electrical connection, a screw

clamp is available apt to receive up to 2 cable terminals, 4mm2

in size. Using a special accessory that is included in the

supply, the connection can also be made through Faston

members.

Special error-fighting codes do not allow relays other than

those compatible with the housing to be inserted.

A cover lid classes the terminal block within the IP20 protectionclass.

When the moving part is pulled out, the current inputs are

automatically short-circuited, whereas the voltage and auxil-

iary circuits are disconnected.

The device front bears two labels:

one plate lists the factory configuration of the device, namely

auxiliary voltage, rated current and frequency;

The other plate, always in accordance with the factory configu-

ration, provides an explanation of LED's indications.

Both labels are easily replaced with new ones, which can bear

any information as required by the client.

As far as the factory configuration relevant to output relays,LED's, digital inputs and relevant settings are concerned,

please refer to tables A, B and C.

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2.1 Selecting rated values

The selection of the rated current between 1 or 5 Ampères for

phase protection is made by acting on a jumper that is located

by one of the following points: S20, S21, S22, S23, which can

be reached once the relay has been pulled out (see fig. 1, 4a,

4b, 4c, 4d).

I WARNING

Dangerous voltages may remain in the device even when thelatter has been de-energized or pulled-out of its casing

(capacitor's memory)

fig. 1

3. OPERATION

3.1 Underresistance protection (rotor ground)

The underresistance protection works by comparing the ratio

between voltage and current injected into the attachment X2/

IPG2A with the set thresholds (R<,R<<): when the calculated

resistance falls below a given threshold,causes the tstart and

the trip timers t1 t2 to trip. If the value remains below thethreshold, once the associated tstart delay is over, the delayed

start command is sent.

If the tripping timers also reach the set overtime, the tripping

command is sent; the partial and total counters related to the

tripped threshold increase their counts and the event logging

session starts.

If a special digital input is enabled which has been set to lock

one or more thresholds, the starting registers are held at zero,

thus preventing operation as long as the input remains ena-

bled.

Threshold R< has a definite time characteristic in the form:

t = t1

3.2 Overcurrent protection (input I)

The device is equipped with an overcurrent threshold (injected

by attachment X2/IPG2A) associated to a tstart and a trip timer.

The overcurrent threshold trip may be locked by feeding a

special digital input purposely set to suit the purpose.

3.3 Undervoltage protection (diagnostics - input U)

The device is equipped with an undervoltage threshold (ap-

plied to attachment X2/IPG2A) associated to a timer. The trip

of the undervoltage threshold can be locked by feeding aspecial digital input purposely set to suit the purpose.

3.4 Overvoltage protection (diagnostics - input U)

The device is equipped with an overvoltage threshold (injected

by the attachment X2/IPG2A) associated to a timer. The trip of

the undervoltage threshold can be locked by feeding a special

digital input purposely set to suit the purpose.

3.5 Direct undervoltage protection (input Ucc)

The device is equipped with a direct undervoltage threshold

associated to a tstart and a trip timer. The direct undervoltagethreshold trip can be locked by feeding a special digital input

purposely set to suit the purpose.

3.6 Direct overvoltage protection (input Ucc)

The device is equipped with a direct overvoltage threshold

associated to a tstart and a trip timer. The direct overvoltage

threshold trip can be locked by feeding a special digital input

purposely set to suit the purpose.

TOP

RELAYFRONT

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3.7 Main and spare settings

The device can store two groups of settings, named 'main' and

'spare' settings, which can be programmed through the

keyboard, a Personal Computer or a network.

The current settings are indicated on the display unit with the

text 'SETTINGS IN USE'.

The device, notwithstanding the selections made, can be

"forced" to use the SPARE settings. Such forcing can be

enabled from the network or through a continuous signal to be

sent to the digital input (IN DIG 1), previously set to implement

this function. This condition is signalled by the presence of the

characters <!> next to the selected settings; when the signal

drops, the previously selected group of settings is enabled

again, whereas the characters <!> disappear (see paragraph

6.1.3).

4. ADDITIONAL FUNCTIONS

4.1 Diagnostics

Diagnostic activities are envisaged which are automatically

carried out upon powering on the device as well as from time

to time during the running, and which provide the following

actions:

- signalling fault or failure conditions. This signal de-energizes the diagnostic relay, turns off the green LED

(indicating running system) and lights up the red LED

(indicating system failure).

- system lock-out in the event of faults that might entail ill-

timed operation (VITAL FAULTS).

- failure code display.

The following failures are classed as NON-VITAL FAULTS:

- output relay(s) (X1 - X5) failure

- communication failure

- internal clock failure

The following failures are classed as VITAL FAULTS:

- feeder failure

- EEPROM failure

- internal or external RAM failure

- Analogue/Digital converter failure

In the presence of vital faults, the device will automatically

displays the fault code; this condition can only be reset, if the

equipment allows this condition to be reset, by enabling the

"settings change' command.

In the event of , upon starting up the equipment, an EEPROM

failure making it impossible to retrieve the information on the

selected dialogue language, the device will continue working

using Italian as the default dialogue language.

The device includes the 'Watch Dog' function.

The diagnostic activity is also aimed at signalling any conditionof "inhibited equipment"; this condition is displayed with a

dedicated code, the diagnostic relay is de-energized and the

red LED (faulty device) lights up. This condition can only be

reset by enabling the 'change settings' command.

The diagnostic menu also indicates the date when last changes

were made to the equipment.

4.2 Output circuits

The output circuits are composed of six relays, each of them

equipped with two contacts (see block diagram).

The X6 relay, normally energized, is strictly assigned to the

diagnostic function.Each of the five relays left, if duly programmed from the

keyboard, a Personal Computer or a network, can be:

- set to perform one or more functions

- preset for:

- monostable operation: immediate return to the quiescent

position when the cause that operated it is removed.

- bistable operation (MEMOR): the tripping position is main-

tained until a reset signal comes from the front push-button,

the digital input or the serial connection.

- a minimum duration of the signal or command (t_IMP).

The output relays, except for the diagnostic relay, can all be

simultaneously set to "normally energized" (NORMAL.ON=ON)or "normally de-energized" (NORMAL.ON=OFF): this selection

is made by acting on the settings change function.

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4.3 LED signalling circuits

The signalling circuits are made of twelve LED's (see fig. 5).

Four LED's are rigorously assigned to previously established

signalling functions:

- (Uaux) green LED ON in the presence of input voltage and

with correct feeder output voltage values

- (RUN) green LED ON with fixed light in normal conditions

and blinking during setting changing and testing functions

- (RUN) red LED ON with fixed light when the diagnostic

detects a fault or a condition of inhibition.

- (Rx Tx) green LED ON with fixed light when the device is

correctly connected, blinking with the communication

board not enabled or not properly set; OFF when the

communication board is not present on the device.

Each of the eight LED's left, if duly programmed from the

keyboard, a Personal Computer or the network, can be:

- set to perform one or more functions

- preset for:

- monostable operation; it immediately goes off when the

cause that made it go on is removed- bistable (MEMOR) operation; the LED remains ON until a

reset signal is sent from the front push-button, the digital

input or the serial connection. Any failure of auxiliary voltage

only entails a momentary loss of the luminous signals,

which come back again as soon as voltage is restored.

A pocket is provided close to the LED's, where LED describing

labels can be placed.

4.4 Digital Inputs

Each of the three optoisolated inputs can be associated with

one or more protection functions by duly programming them

through keyboard, Personal Computer or via network. Theinput voltage may happen not to match the auxiliary voltage of

the device.

The digital inputs can be programmed to be enabled by normal

energizing or normal de-energizing.

4.5 Additional timers

All the optoisolated inputs (IN DIG 1,IN DIG 2,IN DIG 3) can be

programmed to be associated with additional timers (t_X1,

t_X2, t_X3).

When the programmed input is energized, the associated

additional timer is started, and if the timer reaches the overtime

status, the tripping signal is sent and maintained until the input

is reset.

4.6 Counters

Each tripping threshold is associated with a partial and total

counter.

The counters work within the 0-9999 range; if number 9999 is

exceeded, the counter is automatically reset and the count

restarts from the beginning.

All of the partial counters can be reset by acting through the

keyboard, a Personal Computer or via network.

4.7 Event logging

When a tripping event occurs, the following information is

stored in the circulating memory:

- first operated threshold

- day, month, year, time, minute, second and millisecond

identifying the tripping moment.

- values measured when the tripping occurred.

The information concerning one trip is called event.

The circulating memory allows the last 8 events to be stored,

and when this number is exceeded, a new record replaces the

older: the last event is stored as EVENT 1.

The stored events can be read from the front display unit or from

a PC serially connected to the device.

The device can also record the latest 32 changes of state (with

related date and time) and make them available exclusively

through PC or via network.

4.8 Measurements

The device is in a position to display the effective present

values of resistance, expressed in Ohm, direct voltage, ex-

pressed in Un, injected alternating voltage stated in V and

injected alternating current stated in A .

The unit also displays the maximum value of injected alternat-

ing current stated in A ever measured by the latest 'Reset

maximum values'

4.9 Test

Besides the normal diagnostic already dealt with, the device

also offers, in the TEST mode, the possibility of testing the

LED's, the display unit and the output relays.

- The LED test turns on all the LED's, from L1 to L8, and thedisplay unit (LCD) for two seconds.

Once the test is over, the LED's that were supposed to be

ON before the test remain ON and the display unit goes back

to the previous information displayed. The test can also be

performed in any operating condition, without affecting the

operation in progress.

- the relay test allows the output relays X1 to X5 to be

sequentially selected and checked for correct operation. In

this way, any external signalling or control circuit can be

tested, too.

The tested relay remains energized for 150 to 200 ms.

If starting or tripping commands are already present, the

test is not carried out and a dedicated message appears on

the display unit.

The test on auxiliary relays does not affect counters, event

logs and LED's.

4.10 Alphanumeric user identifier

The device can be identified in the plant by an alphanumeric

code, which can be set by the user directly on the equipment

or from a PC. With a network-linked device, the alphanumeric

code can only be modified by operating through the network.

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4.11 Language

The device can display information in four languages: Italian,

English, French and Spanish. The language can be selected

through the keyboard.

4.12 LCD settings

The display can be set for fixed (OFF) or timed (ON) back-lighting; in the last case, the display lights up for 300s any time

a key is pressed .

4.13 Inhibiting operation - Deconfiguration via network

Inhibiting the device is required in operating plants, to avoid

inefficiency on feeding a protection whose settings are un-

known or need to be changed.

The inhibition is performed by holding the settings change

button pressed for about 2 s,while injecting the auxiliary

voltage until the following message is displayed:[ BLOC ]

[ ]

On releasing the push-button, the condition of inhibited device

is signalled by a diagnostic message of P fault.

The normal operating conditions can only be restored by

moving to the settings change function, which is enabled at all

events; a temporary loss of the auxiliary voltage supply does

not affect the inhibited state of the device.

If the device is also equipped with a field-bus board, by holding

the settings change push-button further pressed for about 2s,

in the BLOC state, the device will display:[ NET RESET ? ]

[_ NO YES _]

if a confirmation is provided, the device can also be made lose

its network configuration.

The full procedure for inhibiting and de-configuring the device

via network must be enacted any time you need to replace the

unit.

By resetting an inhibited and deconfigured unit, a K fault

message is displayed and remains displayed until the unit is

configured anew.

Operation can only be reset by moving to the settings change

function, which is enabled in any case.fig. 2

RELAYFRONT

TOP SIDE

BOARD

NOTENABLE

BOARDENABLE

A-A VIEW A-A VIEW

A-A VIEW

I CAUTION

Hazardous voltages can remain in the device even when

the latter has been de-energized or pulled out of its casing

(condenser memory).

4.14 Serial communication on LONWORKS (TM)bus

The device, in the version including the special bus board, can

communicate with a central monitoring and control system at

a speed equalling 1.2 5 Mbaud. The connection to the field bus

is made through terminals: 43 and 45.

The communication board, which can be also added later, is

only enabled if the special S6 jumper is correctly connected,

while it is not in the case the jump is connected in vertical

position across S5 and S6 (see fig. 2).

If the S6 jumper is connected when the communication board

is not present, the diagnostic function displays a message of

failure, behaving as if the board was present and faulty.

Appendix A lists the parameters available for the network.

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4.15 RS485 serial communication and MODBUS protocol

Concerning the communication of devices provided with

software version 2.00 and subsequent, three different versions

are possible:

- whitout any communication card (version

MX3IPG2A .11 e .12);

- provided with LonWorks(TM) communication card (version

MX3IPG2A .61 e .62);

- provided with Modbus communication card (version

MX3IPG2A .71 e .72);

The identification of the installed communication card is

automatic.

When using an unit provided with LonWorks (TM) communication

card, it's required first to effect the relay wiring according to its

wiring diagram and later proceed with the configuration of all

connected devices; the automatic configuration of connected

devices is possible by connecting a PC provided with PCLTA10

or SLTA10 card, in which CORMOX2 software has been

installed.

When using a device provided with Modbus communicationthe configuration of each relay may be realized by the front

interface, or by the IRMA2 program installed on a PC connected

to the relay via front plug. The configuration may be realized

also on relays not jet connected together and may be eventually

organized in files together with all other settings.

Modbus communication card configuration requires:

PARAMETER VALUE

Speed 300 Baud600 Baud

1200 Baud2400 Baud

4800 Baud9600 Baud

19200 Baud

38400 Baud

Parity NONEEVEN

ODD

Data Bit 7

8

Stop Bit 1

2

Address 1 - 255 (0 broadcast)

This parameters can be programmed in local or remote mode.

So, the following extension of the 'RELAY DATA' menu is

available:

[MX3IPG2A ] relay type

[Sw Vers 2.00/01] software version

ñ ò

[PLANT IDENTIFIER]

[GenPan ] ðplant identifier

ñ ò

[SPEED 38400 Bb] ðspeed setting

[PARITY NONE ] ðparity setting

ñ ò

[DATA BIT 8 ] ðdata bit setting[STOP BIT 1 ] ðstop bit setting

ñ ò

[ADDRESS 111 ] ðaddress setting

[ ]

On demand is available documentation about LonWorks(TM) and Modbusversions.

4.16 Fault recorder

The device can record the course of input currents (Ia, Ib, Ic, Io)

and the logic states of the 8 LED's, the 5 auxiliary relays, the

3 digital inputs and the 3 additional timers. The total recording

time equals 2.5s, and can be divided into variable time before

start-up and variable time after start-up. The fault recorder

function can be started for: tstart, tripping, enabling of digital

inputs and timers. The selection of the starting parameters,

the graphic display and reset of fault recorder can be made

through a PC or a network. The function can even be reset by

interrupting the auxiliary voltage for a short while.

4.17 Checking tripping circuits for continuity

The use of a digital input enabled by normal de-energizing

combined with one of the TX timers allows the tripping coil

circuit to be monitored for continuity, whether the breaker is

closed or open.

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5.LOCAL INTERFACE Key It scrolls the menu to the left or selects

the digit to be changed, if the settings

change function is enabled. [ï]

Key It resets the stored LED signals if the

cause has been removed, or the par-

tial counters, if you are in the "display

counters" menu.

It takes the end relays to quiescent

state when they are set to bistable

operation.

Key If pressed for at least 2s, this key

enables the settings to be changed.

When the settings change is ena-

bled, the green LED (RUN) lights up

blinking. If pressed once again for at

least 2s, the system goes back to the

normal running conditions and, pro-

vided that a confirmation is given, the

new settings become the current

ones (the key can only be reached by

removing the cover). During the set-

ting change operations, the device

continues working with the old set-

tings. If the changes made are con-

firmed in the presence of a fault, they

are not made the current ones until

the event is over: the interrupt state is

signalled for 3s by a message on the

display unit, after which you are

prompted to confirm the changes

made.

If pressed upon feeding the device

with auxiliary voltage until a failure

message appears on the display,

this key inhibits the device from oper-

ating.

Keys If simultaneously

pressed for at least 2s, these keys

enable the protection to be tested.

When the testing activity is enabled,

the green LED (RUN) lights up blink-

ing.

If simultaneously pressed for at least

2s during the TEST routine, these

keys enable you to leave the protec-

tion testing mode.

The local interface is made up of:- An LCD display unit organized on two lines of sixteen

characters each.

Through a special keyboard-controlled scanning, the dis-

play unit enables the settings to be read and changed, the

measurements, the counters, the logged events and the

diagnostic information to be read.

- A keyboard or keypad made up of six keys, five of which can

even be reached when the cover is fitted through a special

link.

In addition to the above-mentioned scanning, the keyboard

is also used to change the settings, to carry out tests that

require commands to be sent and stored indications to be

set to zero. The keys that can be reached when the cover is

fitted only allow for read-out and reset operations.

Key It scrolls the menu upwards or in-

creases a value, if the settings

change function is enabled. [ñ]

Key It scrolls the menu downwards or

decreases a value, if the settings

change function is enabled. [ò]

Key It scrolls the menu to the right or se-

lects the digit to be changed, if the

settings change function is enabled

[ð].

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- Twelve LED's, four of which are rigorously dedicated to

general running functions.

- A four-pin connector in compliance with FCC 68.

By means of a special optoelectrical adapter, an optical

fibre cable and a RS232 optical converter, it allows the

device to be locally linked with a personal computer.

The P.C., through a special interface programme, makes

it possible to read and change the settings, to read themeasurements, the counters, the logged events, the diag-

nostic information and the fault recorder.

6. LCD MENU STRUCTURE

6.1 MAIN READING MENU

The device has a main menu, leading to several sub-menus

(tree structure). All the displays can be made permanent .

[R Ω ] Present resistance value[U- Un ] Present direct voltage value

ñ ò

[MENU: ENGLISH] Dialogue language[ ] ð change dialogue language

ñ ò

[DATE ] present date and time[TIME ] ð change date and time

ñ ò

[SETTINGS: ] view settings in use[ MAIN]

ñ ò

[SETTINGS READING] ð view main settings[MAIN ]

ñ ò

[SETTINGS READING] ð view spare settings

[SPARE ]

ñ ò

[ MEASUREMENTS ] ð View/reset present and stored[ ] measurements

ñ ò

[ COUNTERS ] ð view counters and[ P=RESETTABLE ] reset partial counters

ñ ò

[ EVENTS ] ð view[EVENTO 1=ULTIMO] stored events

ñ ò

[ OUTPUT RELAYS ] ð view output relay[ ] settings

ñ ò

[ DIGITAL ] ð view digital input[ INPUTS ] settings

ñ ò

[ LED ] ð view LED settings[ ]

ñ ò

[ RELAY DATA ] ð view model - soft. release[ ] and plant identifier

ñ ò

[ DIAGNOSTIC ] ð view faults[ ] date of last change

6.1.1 Change dialogue language

The default language is ITALIAN.Here follows an example showing how to change the dialogue

language. Suppose we wish to set ENGLISH as the desired

language.

a) Press the key ò or ñ until the following message appears

on the display:[MENU: ITALIAN ]

[ ]

b) By pressing the key ð the language change function is

enabled, and the following message appears on the display:[MENU: ITALIAN ]

[ ]

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By pressingò orñ you scroll the stored languages menu. Forthe purpose of our example, we must stop when the following

message is displayed:[MENU: ENGLISH ]

[ ]

d) By pressing ï you confirm the selected dialogue language

and go back to the main menu. The following message appears

on the display:[MENU: ENGLISH ]

[ ]

6.1.2 Change date and time

Access to "change date/time" is denied when the protection is

network-connected. If the network connection is made after

entering the change function, the local changes are not ena-

bled.

Let us assume we wish to change the starting date 10/06/93

into 24/05/95.

a) Press the keyò

orñ

until the display shows:[DATE 10/06/93]

[TIME 9:38:43]

b) By pressing the key ð the change function is enabled and

the following message appears on the display:[DATE 10/06/93]

[TIME 9:38:43]

c) By pressingð select the value to be changed. To select the

last digit that makes up the date, pressð six times, the displays

will show:[DATE 10/06/93]

[TIME 9:38:43]

d) By pressing ñ, increase the selected value. Hold the key

pressed until the display shows:[DATE 10/06/95]

[TIME 9:38:43]

e) By pressing ï , select the fourth digit that makes up the date,

the display will show:[DATE 10/06/95]

[TIME 9:38:43]

f) By pressing ò, decrease the selected value until the display

shows:[DATE 10/05/95]

[TIME 9:38:43]

g) By pressing ï twice further, select the second digit that

makes up the date, and the display will show:[DATE 10/06/95]

[TIME 9:38:43]

h) By pressing ñ, change the selected value (upon reachingnumber 9, the tens will go up by one unit) until the display

shows:[DATE 24/05/95]

[TIME 9:38:43]

i) Press ï until you move to the beginning of the line. The

display will show: [DATE 24/05/95]

[TIME 9:38:43]

j) By pressing ò the "change time" function is enabled. The

steps are the same as those described in c) to i).

The device does not accept time or date settings that do not

exist.

The time counting starts upon moving from the digits that make

up the time to the wording TIME at the beginning of the line.

k) By pressingï

the changes made are confirmed and thesystem moves back to the main menu. The display will show:

[DATE 24/05/95]

[TIME 9:38:43]

6.1.3 Display settings in use

a) Press ò or ñ until the display shows, for instance:[SETTINGS IN USE:]

[ MAIN]

The second line will display the group of settings the device

currently uses.

Any <!> possibly displayed, notwithstanding the contents of the

second line, indicates the device is working with the SPAREsettings.

[SETTINGS IN USE:]

[ <!> MAIN]

The device will continue working with the SPARE settings aslong as the "change settings" command sent by the IN DIG1

digital input remains enabled. When the <!> characters disap-

pear, the device restarts working with the group of settingsdisplayed.

6.1.4 Display main settings

a) Press ò or ñ until the display shows:[SETTINGS READING]

[ MAIN ]

b) By pressing ð, the main settings display sub-menu is

entered, by pressingò orñ the following sub-menu is scrolled:

rated frequency fn

direct rated voltage setting range (**) S..direct rated voltage Un

first underresistance threshold R<starting signalling delay R< tstart

trip delay R< t1

second underresistance threshold R<<starting signalling delay R<< tstart

trip delay R<< t2alternating overcurrent threshold I~>

starting signalling delay I~> tstart

trip delay I~> t3first direct undervoltage threshold U-<

U-< starting signalling delay tstarttrip delay U-< t4

second direct undervoltage threshold U-<<

U-<< starting signalling delay tstarttrip delay U-<< t5

first direct overvoltage threshold U->U-> starting signalling delay tstart

trip delay U-> t6

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second direct overvoltage threshold U->>U->> starting signalling delay tstart

trip delay U->> t7

additional timer t_X1additional timer t_X2

additional timer t_X3min. pulse width of end relays t_IMP

(**) the settings range relies on jumper S20, S21, S22 or S23which are closed as follows:

jumper closed setting rangeS20 30.00 - 300.00 V

S21 3.00 - 30.00 V

S22 0.30 - 3.00 VS23 0.03 - 0.30 V

c) By pressing ï,anywhere in the sub-menu, you will go back

to the main viewing menu:[SETTINGS READING]

[MAIN ]

6.1.5 Viewing spare settingsa) Press ò or ñ until the display unit shows:

[SETTINGS READING]

[SPARE ]

b)Press the keyð to enter the spare setting viewing menu, then

press ò or ñ to scroll across the whole submenu that lists:

first underresistance threshold R<starting signalling delay R< tstart

trip delay R< t1second underresistance threshold R<<

starting signalling delay R<< tstart

trip delay R<< t2

alternating overcurrent threshold I~>starting signalling delay I~> tstart

trip delay I~> t3first direct undervoltage threshold U-<

starting signalling delay U-< tstarttrip delay U-< t4

second direct undervoltage threshold U-<<

starting signalling delay U-<< tstarttrip delay U-<< t5

first direct overvoltage threshold U->starting signalling delay U-> tstart

trip delay U-> t6

second direct overvoltage threshold U->>starting signalling delay U->> tstart

trip delay U->> t7

Those parameters that are not present in the SPARE menu

take the same values as the MAIN settings.

c) By pressing the key ï anywhere in the sub-menu, you go back

to the main reading menu:

[SETTINGS READING]

[ SPARE ]

6.1.6 Display current and stored measured values

a) Press the key ò or ñ until the display shows:[ MEASUREMENTS ]

[ ]

b) By pressing the key ð you will enter the measurement

display menu, and by pressing the keyò orñ the following sub-

menu will be scrolled across:present resistance value in Ohm R(*)

present direct voltage in Un U-

present injected alternating voltage value in Volt U~

present injected alternating current in Ampere I~

injected overcurrent value in Ampere I~MAX

c) By pressing RESET you may cancel the maximum stored

values being displayed.

By pressing the key ï anywhere in the submenu, you will go

back to the main reading menu:[ MEASUREMENTS ]

[ ]

(*) When resistance cannot be measured, the symbol ---- will

be displayed; when resistance exceeds 6500 Ohm, the sym-

bol >6500 Ω will be displayed.

6.1.7 Viewing counters

a) Press the key ò or ñ until the display shows:[ COUNTERS ]

[P =RESETTABLE ]

b) By pressing the keyð you will enter the counter display sub-

menu, and by pressing the key ò or ñ the following sub-menu

will be vertically scrolled across:

total trips of first underresistance threshold R< Tpartial trips of first underresistance threshold R< P

total trips of second underresistance threshold R<< T

partial trips of sec. underresistance threshold R<< P

total trips of alternating overcurrent threshold I~> Tpartial trips of alternating overcurrent threshold I~> P

total trips of first direct undervoltage threshold U-< Tpartial trips of first direct undervoltage threshold U-< P

total trips of sec. direct undervoltage threshold U-<< Tpartial trips of sec. direct undervoltage threshold U-<< P

total trips of first direct overvoltage threshold U-> T

part. trips of first direct overvoltage threshold U-> Ptotal trips of sec. direct overvoltage threshold U->> T

partial trips of sec. direct overvoltage threshold U->>P

c) By pressing the RESET button, the partial counter being

displayed can be reset.

d) By pressing the keyï , you go back to the main display menu:

[ COUNTERS ]

[ P =RESETTABLE ]

6.1.8 Viewing events

a) Press ò or ñ until the display shows:[ EVENTS ]

[EVENT 1=LAST]

b) By pressing ð you enter the sub-menu where the eight

events to be stored can be selected. The display shows:[EVEN.1 DD/MM/YY ]

[ hh:mm:ss.xxx ]

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the first line displays the event number, the day, the month andthe year, whereas the second line lists the time, the minutes,

the seconds and thousandths of a second concerning the

event.

c) By pressing the keyò orñ, select the event to be displayed.

Once the selection is made, pressð ; thus, you enter the event

display sub-menu, and by pressing ò or ñ the following sub-

menu is scrolled:

tripped threshold TRIPvalue of resistance in Ω when the trip occurred R_G

value of alternating current in A when the trip occurred I~Gdirect voltage value in mult.of Un when the trip occurredU-_G

d) By pressing ï anywhere in the sub-menu, you go back to

event display sub-menu; to display other events go through step

c) again. By pressingï anywhere in the sub-menu you go back

to the main reading menu:[ EVENTS ]

[EVENT 1=LAST]

6.1.9 Display output relays

a) Press ò or ñ until the display shows:

[OUTPUT RELAYS]

[ ]

b) By pressing ð you enter the sub-menu that displays the

allocation of the auxiliary output relays. The display shows:[REL X12345]

[ON ↑↑↑↑↑]

which stands for the enabling by normal energizing (↑) or de-

energizing (↓) of each relay.

Press ò to scroll across the whole submenu, the display unitwill show:

[R< START]

[REL X..3.5]

the first line displays the function that is associated with therelay or relays listed in the second line.

By pressing the keys ò or ñ the sub-menu is scrolled across.

The functions that can be associated with the output relays are:

delayed start of first underresistance threshold R< START

first underresistance threshold trip R< TRIPdelayed start of sec. underresistance threshold R<< START

second underresistance threshold trip R<< TRIP

delayed start of injected overcurrent threshold I~> STARTalternating overcurrent threshold trip I~> TRIP

undervoltage (diagnostics) threshold trip U~< TRIPovervoltage (diagnostics) threshold trip U~> TRIP

delayed start of first direct undervoltage thresholdU-< STARTfirst direct undervoltage threshold trip U-< TRIP

delayed start of sec. direct undervoltage thresholdU-<< START

sec. direct undervoltage threshold trip U-<< TRIPdelayed start of first direct overvoltage threshold U-> START

first direct overvoltage threshold trip U-> TRIPdelayed start of sec. direct overvoltage thresholdU->> START

direct overvoltage threshold trip U->> TRIP

timer tX1 overtime t_X1 TRIPtimer tX2 overtime t_X2 TRIP

timer tX3 overtime t_X3 TRIP

first digital input fed IN DIG 1second digital input fed IN DIG 2

third digital input fed IN DIG 3

It is furthermore possible to display the output relays that bear

the following settings:minimum pulse width t_IMP

bistable operation MEMOR

c) By pressing the key ï anywhere in the sub-menu, you go

back to the main reading menu:[OUTPUT RELAYS]

[ ]

6.1.10 Viewing digital inputs

a) Press the key ò or ñ until the display shows:[ DIGITAL ]

[ INPUTS ]

b) By pressing the key ð you enter the sub-menu that lists the

allocation of digital inputs. The following message appears onthe display:

[IN DIG 123]

[ON ↑↑↑]

which stands for the enabling by normal energizing (↑) or de-

energizing (↓) of each input.

Press ò to scroll across the whole sub-menu, the display unit

will show:[BLOC. R< ]

[IN DIG ...]

the first line contains the function that is associated with thedigital inputs listed in the second line.

By pressing the keys ò or ñ the sub-menu is scrolled.

The functions that may be associated with the inputs are:

first underresistance threshold trip lock BLOC. R<

second underresistance threshold trip lock BLOC. R<<overcurrent threshold trip lock BLOC. I~>

undervoltage threshold trip lock BLOC. u~<overvoltage threshold trip lock BLOC. u~>

first direct undervoltage threshold trip lock BLOC. U-<

second direct undervoltage threshold trip lock BLOC. U-<<first direct overvoltage threshold trip lock BLOC. U->

second direct overvoltage threshold trip lock BLOC. U->>

timer tX1 start t_X1timer tX2 start t_X2

timer tX3 start t_X3Switching to spare settings SETTINGS SWITCH

LED's and output relays reset RESET


back to the main reading menu:[ DIGITAL ]

[ INPUTS ]

6.1.11 Display LED's

a) Press the key ò or ñ until the following message appears

on the display:[ LED ]

[ ]

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b) By pressing the keyð you enter the sub-menu that displays

the LED allocation. The following messages will be displayed:[I> START]

[LED L..3..6.8]

the first line displays the function that is associated with the

LED's listed in the second line.

By pressing the keysò orñ, the sub-menu is vertically scrolled.

The functions that can be associated with the LED's are:

delayed start of first underresistance threshold R< START

first underresistance threshold trip R< TRIP

delayed start of sec. underresistance threshold R<< STARTsecond underresistance threshold trip R<< TRIP

delayed start of injected overcurrent threshold I~> STARTalternating overcurrent threshold trip I~> TRIP

undervoltage (diagnostics) threshold trip U~< TRIP

overvoltage (diagnostics) threshold trip U~> TRIPdelayed start of first direct undervoltage thresholdU-< START

first direct undervoltage threshold trip U-< TRIPdelayed start of sec. direct undervoltage thresholdU-<< START

sec. direct undervoltage threshold trip U-<< TRIP

delayed start of first direct overvoltage threshold U-> STARTfirst direct overvoltage threshold trip U-> TRIP

delayed start of sec. direct overvoltage thresholdU->> STARTdirect overvoltage threshold trip U->> TRIP


timer tX2 overtime t_X2 TRIPtimer tX3 overtime t_X3 TRIP

first digital input fed IN DIG 1second digital input fed IN DIG 2


It is furthermore possible to display the LED's that bear the

following settings:

bistable operation MEMOR


back to the main reading menu:[ LED ]

[ ]

6.1.12 Viewing relay data

a) Press ò or ñ until the display shows:[ RELAY DATA ]

[ ]

b) By pressing the key ð you enter a sub-menu where the

protection model and the software release are displayed:[MX3IPG2A ]

[Soft Rel. 1.00]

c) By pressing the keyòonce again, the second line will display

the alphanumeric identification code that the user gave to the

device, for instance:[PLANT IDENTIFIER]

[CELL No. 17bis ]

d) By pressing the key ï anywhere in the sub-menu, you go

back to the main reading menu:[ RELAY DATA ]

[ ]

6.1.13 Diagnostic display

1) Fault location

a) Press the key ò or ñ until the following message is

displayed:[ DIAGNOSTIC ]

[ ]

In the presence of VITAL FAULTS, the device automaticallydisplays the window, without needing to enter the diagnostic

menu.

b) By pressing the key ð you enter a sub-menu that displays

the operating state of the relay. The display will show:[LAST SETTING ]

[DD/MM/YY hh:mm]

the second line displays the day, the month, the year, the time

and the minutes of the time when last change was made to the

settings.

c) By pressing the keyò

once again, if the device has notdetected any failure, the following message will be displayed:[ RUNNING ]

[ ]

If NON-VITAL FAULTS are detected, the following message willbe displayed:

[FAULT ]

[ABCDE.....KL ]

whereas, if VITAL FAULTS are detected, the <!> characters will

be displayed, too:[FAULT <!>]

[.....FGHIJ... ]

The second line displays one or more fault identification

codes.

The following table provides the fault codes and the corre-

sponding fault description:

Code fault description

A X1 relay coil interrupted or related driver

B X2 relay coil interrupted or related driver

C X3 relay coil interrupted or related driver

D X4 relay coil interrupted or related driver

E X5 relay coil interrupted or related driver

F internal feeder failure

G EEPROM failure

H Internal RAM failureI External RAM failure

J Analogue to Digital converter

K communication board failure or enabled but

not configured

L internal clock failure

If jumper S6 (see fig.2) that enables the communication board

is connected when the board is not present, the K code shows

up, as if a failure were detected in the board.

d) As far as the NON-VITAL FAULTS are concerned, by pressing

the keyï

anywhere in the sub-menu you go back to the maindisplay menu:[ DIAGNOSTIC ]

[ ]

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whereas, as regards the VITAL FAULTS, you can only leave the

diagnostic sub-menu, if the device allows you to do that, byentering the “settings change” menu.

2) Inhibited device

The condition of “inhibited device” is displayed as follows:[FAULT <!>]

[..............P ]

This condition can only be reset by entering the "settings

change“ menu (it is however necessary to confirm when you

are prompted to SAVE CHANGES, although no setting has

been changed).

Warning: even simply view the set parameters from the

“settings change” menu, since upon leaving this condition, the

device will not be inhibited any longer.

If, beside inhibiting the device, you have also deconfigured it,

the return to operation causes a fault K message to be

displayed until the unit is configured anew (see paragraph

4.14).

6.2 MAIN SETTING CHANGE MENU

By pressing the key anywhere in the display menus

for at least 2s, the main settings change menu is entered.

Thence, several sub-menus can be entered (tree- structure).

When the settings change function is enabled, the green LED

(RUN) lights up blinking.

If the settings change menu is already acceded through a PC

or a network, any local change is inhibited, and the following

message will be displayed:

[SETTINGS CHANGE]

[NOT AVAILABLE ]

The access priority to the changing function among PC, net-

work and keyboard is time-dependent.

During the settings change operations, the device continues

working with the old settings.

All the displays can be made permanent.

[SETTINGS IN USE:] settings in use

[ MAIN] ð select of current setting group

ñ ò[SETTINGS CHANGE] ð change main settings[MAIN ]

ñ ò

[SETTINGS CHANGE] ð change spare settings[SPARE ]

ñ ò

[ OUTPUT RELAYS ] ð output relays

[ ] settings

ñ ò

[DIGITAL INPUTS ] ð digital inputs

[ ] settings

ñ ò

[ LED ] ð LED's settings[ ]

ñ ò

[ RELAY DATA ] ð setting of[ ] alphanumeric code

ñ ò

[ LCD ] ð permanent display back-lighting

[AUTOMATIC RETURN] (LCD) enabled

By pressing the key anywhere in the changing

menus for at least 2 seconds, you go back to the main display

menu, but you are first prompted to confirm or discard the

changes made:[NEW SET.CONFIRM?]

[< NO YES >]

By pressing ï all the changes made are discarded, whereas

by pressing ð the changes made are confirmed.

The green LED (RUN) stops blinking and becomes perma-

nent.

If upon confirming the changes, a fault is detected, the settings

are not accepted as long as the fault event persists. This stateis signalled for 3s by the following message:

[SETTINGS CHANGE]

[DELAYED ]

once the event is over, you are prompted to confirm the

changes made again.

If the transfer is interrupted is due to a digital input being

enabled which cannot be disabled at the moment and you

need to change the settings, the device must be inhibited; after

that, you can start changing the settings (see paragraphs 4.14

and 6.1.13).

Note: the “change settings” function can even be implemented

when the device is “forced” to use the SPARE SETTINGS. In

such a case, the system only interrupts the selection of

SETTINGS IN USE: MAIN until the external forcing signal

disappears. If a setting is changed when the system is “forced”

from the outside, the following message is displayed:

[SPARE SETTINGS]

[FROM EXT.CONTROL]

All the following examples take their start from the main

settings change menu.

6.2.1 Select current settings group

a) Press the key ò or ñ until the following message is dis-

played:[SETTINGS IN USE:]

[ MAIN]

b) After pressing the keyð, the current settings can start being

changed. The following message is displayed:[SETTINGS IN USE:]

[ MAIN]

c) By pressing ò or ñ, the following message is displayed:[SETTINGS IN USE:]

[ SPARE]

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d) By pressing the key ï the new selection is confirmed, and

the system goes back to the main settings change menu. Thefollowing message is displayed:

[SETTINGS IN USE:]

[ SPARE]

6.2.2 Change main settings

a) Press the keyò

orñ

until the following message isdisplayed:[SETTINGS CHANGE]

[MAIN ]

b) By pressing the keyð , you enter the main settings change

sub-menu, which contains all the parameters already listed in§ 6.1.3.

c) By pressing the keysò orñ, you can vertically scroll the sub-

menu, and by pressing the keyð you can start changing the

displayed parameter. The change can be made by pressing

the keys ò orñ .

d) By repeatedly pressing the key ï anywhere in the sub-

menu, you go back to the main changing menu:[SETTINGS CHANGE]

[MAIN ]

Example of setting

Let us suppose we need to enable and set the rotor ground

threshold R< to 1015 Ohm starting from an initial setting of

990, OFF.

Go through steps a) and b)

Press ò orñ until the threshold to be changed is selected on

display:[R< OFF]

[R< 0990 Ω ]

Press ð to start changing the selected setting I>>>,the display

unit will show:[R< OFF]

[R< 0990 Ω ]

Press ò or ñ to set it ON and the display will show:

[R< ON ]

[R< 0990 Ω ]

Pressï to move back to the beginning of the line. Thus, by

pressing ò, you may move to the second line.

Pressð to select the digit to be changed.In our case, by pressing 4 times the key ð, the display unit will

show:[R< ON ]

[R< 0990 Ω ]

Press ñ to increase the selected numberuntil the value re-

quired by our example is reached:[R< ON ]

[R< 0995 Ω ]

Now, by pressing ï you select the third digit making up the

setting, the display unit will show:[R< ON ]

[R< 0995 Ω ]

By pressing ñ the digit is changed (on reaching number 9 the

units will increase by 1) until the display unit shows:

[R< ON ]

[R< 1015 Ω ]

Pressï to move back to the beginning of the line and go back

to the main editing menu:[SETTINGS CHANGE]

[MAIN ]

Warning:

In the event of the direct rated voltage setting range being

changed, please remember to move the internal jumper

(S20....S23) as follows:

jumper closed setting range

S20 30.00 - 300.00 V

S21 3.00 - 30.00 VS22 0.30 - 3.00 V

S23 0.03 - 0.30 VThe movement of the jumper causes the setting to be changed,

as the latter is multiplied times 10d

where d is the distancebetween the old and the new jumper, for instance:

old setting

jumper S20setting range 30-300 V

set Un 165 V

new setting jumper S23

setting range 0.03-0.30 Vset Un 165 x 10(20-23)= 0.16 V

6.2.3 Change spare settings

a) Press the key ò or ñ until the following message is

displayed:[SETTINGS CHANGE]

[SPARE ]

b) By pressing the keyð , you enter the spare settings change

sub-menu, which contains all the parameters already listed in§ 6.1.5.

c) By pressing the keysò orñ ,you can vertically scroll the sub-



the keys ò or ñ .

The settings change procedure mirrors that described in the

example applying to the main settings.


back to the main settings change menu:[SETTINGS CHANGE]

[SPARE ]

6.2.4 Set output relays

a) Press the key ò or ñ until the display shows:[OUTPUT RELAYS]

[ ]

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b) By pressing the keyð , you enter the output relay setting sub-

menu, which contains all the parameters already listed in §6.1.5

c) By pressing the keysò orñ , you can vertically scroll the sub-



the keys ò or ñ.


back to the main settings change menu:[OUTPUT RELAYS]

[ ]

Example of allocation

Consider we need to allocated the trip of the overcurrent

threshold R< to output relay X5 starting from an initial setting

of R< allocated to X2

Go through steps a) and b) until the display unit shows:

[R< TRIP]

[REL X.2...]

Each position after letter X is an output relay. More relays may

be allocated to one function.

Press ð to move to the relay you wish to associate.

In our case, by pressing the key ð five times, the display unit

will show:[R< TRIP]

[REL X.2...]

By pressingò orñ the selected relay X5 is dissociated and the

display unit will show:[R< TRIP]

[REL X.2..5]

By pressingï you select the second relay, the display unit will

show:[R< TRIP]

[REL X.2..5]

Press ò or ñ to dissociate the selected relay, the display unit

will show:[R< TRIP]

[REL X....5]

Pressï to move back to the beginning of the lineand return to

the main editing menu:[OUTPUT RELAYS]

[ ]

6.2.5 Set digital inputs

a) Press the key ò or ñ until the display shows:[ DIGITAL INPUT ]

[ ]

b) b) By pressing the key ð , you enter the digital input setting

sub-menu, which contains all the parameters already listed in

§ 6.1.10.

c) By pressing the key ò or ñ the sub-menu is vertically

scrolled, and by pressing the key ð, you can start changing

the selected parameter. The change can be made by pressing

the keyò or ñ.

To switch from the main settings to the backup settings, thedigital input number 1 (IN DIG 1) must be used

SETTINGS SWITCH

To reset the LEDs and the auxiliary relays, the digital inputnumber 3 (IN DIG 3) must be used.

RESET(LED+Xmem)

The setting procedure mirrors that described in the example

of output relay configuration.


back to the main changing menu:[ DIGITAL INPUT ]

[ ]

6.2.6 LED Settings

a) Press the key ò or ñ until the display shows:[ LED ]

[ ]

b) By pressing the key ð , the LED setting sub-menu, which

contains the parameters already listed in § 6.1.10., is entered.

c) By pressing the key ò or ñ the sub-menu is vertically

scrolled, and by pressing the key ð, you can start changing

the displayed parameter. The change can be made by press-

ing the keyò orñ .

The setting procedure mirrors that described in the example

of output relays setting.

d) By pressing the key ï anywhere in the sub-menu , you go

back to the main changing menu:[ LED ]

[ ]

6.2.7 Set alphanumeric code

a) Press the key ò or ñ until the display shows:[ RELAY DATA ]

[ ]

b) By pressing the key ð, you can change/set an alphanumeric

code that identifies the device. The display will show, forinstance:[PLANT IDENTIFIER]

[CELL N. 17bis ]

c) By further pressing the keyð you select the character(s) to

be changed, and by pressing ò or ñ all the capital and smallletters of the alphabet, all the numbers and some special

characters, among which the blank space, are vertically scrolled.

d) By pressing the key ï, the cursor moves back to the

beginning of the line (no character selected), and by further

pressing the key ï , you go back to the main changing menu:[ RELAY DATA ]

[ ]

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6.2.8 LCD back-lighting

a) Press the key ò or ñ until the display shows:[ LCD ]

[AUTOMATIC RETURN]

b) By pressing the key ð, you can set the LCD back-lighting

to permanent (OFF) or timed (ON). Let us assume the display

shows: [ ON ]

[ ]

c) By pressing the keys ò or ñ, the current setting can be

changed:

[ OFF]

[ ]

d) By pressing the key ï, you go back to the main changing

menu:[ LCD ]

[AUTOMATIC RETURN]

6.3 TEST MENU

By pressing the keys for at least 2s

anywhere in the main reading menus, the TEST function,

which is highlighted by the blinking of the green LED (RUN),

is enabled.

[TEST LED]

[ YES >] ð TEST LED’s L1-L8 and display

ñ ò[TEST RELAY X1]

[ YES >] ð TEST relay X1

ñ ò

[TEST RELAY X2]


ñ ò

[TEST RELAY X3]


ñ ò

[TEST RELAY X4]


ñ ò

[TEST RELAY X5]


The test to be carried out on the auxiliary relay X.. makes the

latter trip, so that the associated command and/or signal can

be sent. That is why, before running it, the systems prompts

you to further confirm its execution:[ ARE YOU SURE? ]

[< NO YES >]

If, upon confirming the execution, some starting or tripping

commands are already present or a digital input combined

with a timer proves to be enabled, the test is not performed, and

this condition is signalled by the following message:[TEST ]

[NOT AVAILABLE ]

The LED and display test makes them light up for two seconds.

Therefore, it can be run at any time during operation

By pressing the two keys for two seconds

anywhere in the test menu, the TEST function is disabled. The

green LED (RUN) stops blinking, and the system goes back

to the main display menu.

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7. APPLICATION AND USE

The device is suitable to detect the ground rotor faults for

synchronous machines.

It is also suitable to monitor direct voltage (Vaux)

8. INSTALLATION - TRANSPORT

8.1 ESD Electrostatic charges

The relay uses electronic components that are highly sensitive

to electrostatic charges. Therefore, the operator who happens

to handle the moving part of the equipment and come in contact

with the electronic circuits, must take preventive measures to

avoid damaging the relay:- before removing the movable part, the operator must reach

the same potential as the equipment by touching the case

- avoid touching electronic components, printed circuit

boards and connectors, as far as this is possible. Handle

it by using the mechanical frame.

- lay the device on surfaces that are antistatic or feature the

same potential as the operator's.

- only store and transport the relay by using the special

antistatic bag.

Special electronic devices require the operator and the unit to

be both grounded along with any measuring instrument, when

this is possible.

As far as the following action is possible and reasonable, do

not pull out the moving part from the casing to avoid causing

mechanical and electrostatic damages to the protection.

8.2 Acceptance - storage

Although protective relays are generally of robust construction,

they require a careful treatment prior to installation on site,

since they must be carefully packed and unpacked, without

applying any force and using suitable tools.

Once supplied, the relays must be thoroughly inspected to

ensure that they have not undergone shipping damages.

If the relays are not immediately installed upon reception, they

must be stored in places free from dust and moisture, in their

original packing.

Storage temperature: -25°C + 80°C.

8.3 Assembling and connection

- Remove the protective cover until the four fastening holes

become visible.

- Place the equipment into the hole of the panel-board and

secure it by fastening the four screws (see fig. 6)

- Connect the ground screw of the equipment to the protection

ground of the panel-board using connectors of suitable gauge(>4mm2) and as short as possible (<1m).

- The connections must be made through the screw or Faston

connections of the interface terminal blocks. In the event of

Faston wiring, the cover that provides the terminal block with

the IP20 protection class must be placed before the Faston is

connected to the relay. In the event of screw wiring, the side fins

of the IP20 cover that correspond to the wired terminals must

be removed or folded.

The assembling and wiring must be carried out according to

the best workmanship.

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9. SETTING THE UNIT AT WORK

The relay is supplied with factory settings and configurations

as indicated in tables A, B and C (factory settings).

These settings may happen not to match the specific system

where the unit is to be placed. Therefore, the relay settings

must be changed in compliance with the tables D, E and F for

customer’s use, which must be used as a support to develop

a customized setting scheme.

9.1 Safety regulations

During the equipment tests and the start-up, the general safety

regulations applicable to electrical systems must be com-

plied with. Failure to comply with these regulations might

cause harm to the working staff and damage to property. All the

inspections and tests must only be carried out by specially

trained staff.

9.2 Checking nameplate ratings

Inquire whether the equipment ratings are consistent withthose of the system, namely:

- the auxiliary voltage

- the auxiliary voltage of the attachment X2/IPG2A

- the direct rated voltage, the check shall be carried out by

checking the position of the jumper located on the board (see

fig. 4a, 4b, 4c, 4d). warning: any wrong position of the jumper

as to the set values is likely to damage the device .

- the presence of the special jumper S6, see figure 2, if the

communication board is provided and the network is present.

I WARNING

hazardous voltages may remain in the device even when the

latter has been de-energized or pulled out of its casing

(capacitor's storage)

9.3 Final test with gauging of the attachment X2/IPG2A

Inject auxiliary voltage into the device.

On switching on, after a long time of power failure, the device

can indicate an 'L' type fault (internal clock), a NON-VITAL

FAULT which does not affect the remaining functions: by

updating DATE and TIME, the normal service conditions are

restored.

If the system is running and the relay settings are unknown, theunit must be inhibited from operating before feeding it with

voltage by pressing the “settings change” key (see § 4.14 and

6.1.13 clause 2) to avoid troubles.

Select the rated frequency of the system on the device, set the

rated current and the rated direct voltage.

Load the settings and configure the relays, the LED’s and the

digital inputs as per the design plans.

Since the unit is equipped with a self-monitoring system, all

hardware and software failures possibly occurring are auto-

matically detected; this makes it useless to test the thresholds

for accuracy, which can however be tested by making refer-

ence to the tolerances specified on the catalogue.

The following tests are however recommended:

Power supply unit test

- Check that the burden of the auxiliary voltage circuit falls

within the 5 to 10W range as far as the d.c. supply is

concerned, and within the 10 to 20VA range as far as the a.c.

supply is concerned.

The feeder is protected by a special 5x20 2 A rapid fuse,

class IEC127/II, as regards the unit with 19-100Vcc (or 19-

72Vca) auxiliary voltage, and a 1A fuse as regards the unit

with 64-300Vcc (or 64-275Vca) auxiliary voltage.

Gauging the attachment X2/IPG2A

- connect to one another terminals 9B-10B-12B of the

attachment X2/IPG2A

- inject the (alternating) auxiliary voltage into the attachment

X2/IPG2A

- ensure that the connection between the attachment X2/

IPG2A and the device MX3IPG2A is correct

- enter the main Settings Change mode (see 6.2 - 6.2.2)

-press ò until the following message is displayed:[ CALIBRATION ]

[X2/IPG2A YES >]

-press ð, the display unit will show:

[ CONFIRM? ]

[< NO YES >]

-press ð

- remove the connection among terminals 9B-10B-12B of

the attachment X2/IPG2A

- leave Settings Change

Checking connections

- Connect between rotor winding and mass a resistance

that ranges between 200 and 6500 Ohm in value and check

it matches the values displayed in the MEASUREMENT

menu.

- Inject a direct voltage into the input (terminals 10-9) and

check it matches the values displayed in the MEASURE-

MENT menu.

- Test each output relay through the procedure given in the

TEST MENU paragraph, simultaneously test the related

external circuit.

- Check the wiringof the digital inputs to ensure it matchesthe

provisions of the design plans.

If the relay has not worked correctly or shows VITAL failures,

it must be put out of order and sent back to the factory for repair

or re-gauging.

The presence of a NON-VITAL fault does not cause an ill-timed

operation, but demands an analysis of the fault type to assess

its importance (for instance, a failing end relay should be

replaced with another end relay that is not currently being used

or, else, whose function is not strictly required).

The possibility of exchanging the relays makes it possible to

maintain the protection scheme working during repairs, so

that any faulty relay can be replaced with a new one of the same

type.

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pag. 25


To complete the start-up stage, before setting the system at

work, ensure that:

- the device settings match the design specifications.

- the device bears the correct plant-identifying alphanu-

meric code.

- all the device memories (LED’s, maximum values, partial

counters and wear index) are reset.

- the green Uaux and RUN LED’s are lit up with permanentlight; in the event of network connection, the green RxTx LED

must be lit up, too.

- the LED’s indicating labels and the device rating plate

display the correct information.

You can leave the relay with the display showing any of the

windows of the main reading menu.

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SETTING RANGE OF Un: 30 - 300 V

Position of jumper n S20

SETTING RANGE OF Un: 3 - 30 V


SETTING RANGE OF Un: 0.3 - 3 V


SETTING RANGE OF Un: 0.03 - 0.3 V


fig. 4a fig. 4b

fig. 4c fig. 4d

Warning:

jumpersn S1 - S3 - S7 shall not be removed (as per the originalfactory settings)

TOP SIDE

RELAY

FRONT

TOP SIDE

RELAY

FRONT

TOP SIDE

RELAY

FRONT

TOP SIDE

RELAY

FRONT

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pag. 27


Warning:

In the event of one sole polarity of the rotor winding (BRUSHLESS

energizer) being available, the injectors (terminals 9B - 10B)

shall be connected to one another.

fig. 5

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pag. 28


OVERALL DIMENSIONS

DRILLING DIME TERMINALS

The casing can even be mountedon a 19" rack panel, R4MX3 type,4U in height

fig. 6

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OVERALL DIMENSIONS AND DRILLING DIME - ATTACHMENT X2

fig. 7

HOLES HOLES

DRILLING WITH REAR CONNECTIONS DRILLING WITH REAR CONNECTIONS

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WARNING:

The factory settings may prove not to suit the system. Therefore, the device must be configured anew upon installation

tab. A - FACTORY SETTINGS

RELAY CONTROL MATRIX LED'S1 2 3 4 5 DESCRIZIONE FUNZIONE 1 2 3 4 5 6 7 8

X del. start of first underresistance threshold R< START

X first underresistance threshold trip R< TRIP X

X del. start of 2dn underresistance threshold R<< START

X 2nd underresistance threshold trip R<< TRIP X

overcurrent threshold start I~> START

X overcurrent threshold trip I~> TRIP X

X undervoltage threshold trip U~< TRIP X

X overvoltage threshold trip U~> TRIP X

del. start of first dir. undervolt. threshold U-< START

X scatto first dir. undervoltage threshold U-< TRIP Xdel. start of second dir. undervolt. threshold U-<< START

X second dir. undervoltage threshold trip U-<< TRIP X

del. start of first dir. overvoltage threshold U-> START

X first dir. overvoltage threshold trip U-> TRIP X

del. start of second dir. overvoltage thresh. U->> START

X second dir. overvoltage threshold trip U->> TRIP X




first digital input fed IN DIG 1

second digital input fed IN DIG 2


minimum pulse width t_IMP / / / / / / / /

bistable operation MEMOR X X X X X X X

normally energized end relays

/ not to be allocated

X allocatednormally de-energized end relays

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tab. B - TABLE OF SETTINGS

CONTROL MATRIX DIGITALINPUTS

DESCRIPTION FUNCTION 1 2 3

input enabled by normal de-energizing

first underresistance threshold trip lock BLOC. R<

sec. underresistance threshold trip lock BLOC. R<<

overcurrent threshold trip lock BLOC. I~>

overvoltage threshold trip lock BLOC. U~>

undervoltage threshold trip lock BLOC. U~<

first dir. undervolt. threshold trip lock BLOC.U-<

sec. dir. undervolt. thr. trip lock BLOC.U-<<

first dir. overvolt. threshold trip lock BLOC.U->sec. dir. overvolt. threshold trip lock BLOC.U->>

timer tX1 start t_X1



switching to spare settings SETTINGS SWITCH / /

reset LED's and output relays RESET (LED+Xmem) / / X

WARNING:



X allocated

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WARNING:


TABELLA DI REGOLAZIONE

tab. C - FACTORY SETTINGS

DESCRIPTION FUNCTION MAIN

ON OFF VALUE

rated frequency fn 50 Hz

direct voltage range IN_U- S20

direct rated voltage Un- 110 V

first underresistance threshold R< X 2000 Ohm

starting signalling delay R< tstart 0 s

trip delay R< t1 10 s

second underresistance threshold R<< X 500 Ohm

starting signalling delay R<< tstart 0 s

trip delay R<< t2 3 s

overcurrent threshold I~> X 0.022 A

starting signalling delay I~> tstart 0 s

trip delay I~> t3 5 s

first dir. undervoltage threshold U-< X 0.8 Un

starting signalling delay U-< tstart 0 s

trip delay U-< t4 5 s

second dir. undervoltage threshold U-<< X 0.7 Un

starting signalling delay U-<< tstart 0 s

trip delay U-<< t5 1 s

first dir. overvoltage threshold U-> X 1.15 Un

starting signalling delay U->> tstart 0 s

trip delay U->> t6 5 s

second dir. overvoltage threshold U->> X 01.2 Un

starting signalling delay U->> tstart 0 s

trip delay U->> t7 1 s

min. pulse width of end relays t_imp 0.1 s

additional timer t_X1 1 s



fault recorder trigger TRIP

fault recorder pretrigger delay 2 s

SPARE

ON OFF VALUE

/ / /

/ / /

/ / /

X 2000 Ohm

0 s

10 s

X 500 Ohm

0 s

3 s

X 0.022 A

0 s

5 s

X 0.8 Un

0 s

5 s

X 0.7 Un

0 s

1 s

X 1.15 Un

0 s

5 s

X 1.2 Un

0 s

1 s

/ / /

/ / /

/ / /

/ / /

/ / /

/ / /

/ not to be allocated: the same settings as the

MAIN ones applysettings: MAIN timed LCD backlighting: OFF

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tab. D

RELAY CONTROL MATRIX LED'S

1 2 3 4 5 DESCRIPTION FUNCTION 1 2 3 4 5 6 7 8

delayed start of first underresistance thr. R< STARTfirst underresistance threshold trip R< TRIP

delayed start of sec. underres. threshold R<< START

first underresistance threshold trip R<< TRIP

overcurrent threshold start I~> START

overcurrent threshold trip I~> TRIP

undervoltage threshold trip U~< TRIP

overvoltage threshold trip U~> TRIP

del.st. first dir. undervoltage threshold U-< START

first dir. undervoltage threshold trip U-< TRIP

del.st. second dir. undervoltage threshold U-<< START

sec. dir. undervoltage threshold trip U-<< TRIPdel.st. first dir. overvolt. threshold U-> START

first dir. overvolt. threshold trip U-> TRIP

del.st. sec. dir. overvolt. threshold U->> START

second dir. overvolt. threshold trip U->> TRIP




first digital input fed IN DIG 1

second digital input fed IN DIG 2


min. pulse width t_IMP / / / / / / / / bistable operation MEMOR

normally energized end relays

normally de-energized end relays

normally energized end relays / not to be allocated

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tab. E

CONTROL MATRIX DIGITAL

INPUTS

DESCRIPTION FUNCTION 1 2 3input enabled by normal de-energizing

first underres. threshold trip lock BLOC. R<

sec. underres. threshold trip lock BLOC. R<<

overcurrent threshold trip lock BLOC. I~>

overvoltage threshold trip lock BLOC. U~>

undervoltage threshold trip lock BLOC. U~<

first dir. underv. threshold trip lock BLOC.U-<

sec. dir. underv. threshold trip lock BLOC.U-<<

first dir. overv. threshold trip lock BLOC.U->

sec. dir. overv. threshold trip lock BLOC.U->>

timer tX1 start t_X1timer tX2 start t_X2


switching to spare settings SETTINGS SWITCH / /

reset LED's and output relays RESET (LED+Xmem) / /


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tab. F

TABLE OF SETTINGS

DESCRIPTION FUNCTION MAIN

ON OFF VALUE

rated frequency fn

direct voltage range IN_U-

direct rated voltage Un-

first underresistance threshold R<

starting signalling delay R< tstart

trip delay R< t1

second underresistance threshold R<<

starting signalling delay R<< tstart

trip delay R<< t2

overcurrent threshold I~>

starting signalling delay I~> tstart

trip delay I~> t3

first dir. undervoltage threshold U-<

starting signalling delay U-< tstart

trip delay U-< t4

second dir. undervoltage threshold U-<<

starting signalling delay U-<< tstart

trip delay U-<< t5

first dir. overvoltage threshold U->

starting signalling delay U->> tstart

trip delay U->> t6

second dir. overvoltage threshold U->>

starting signalling delay U->> tstart

trip delay U->> t7

min. pulse width of end relays t_imp

additional timer t_X1



fault recorder trigger

fault recorder pretrigger delay

SPARE

ON OFF VALUE

/ / /

/ / /

/ / /

/ / /

/ / /

/ / /

/ / /

/ / /

/ / /

settings: MAIN timed LCD backlighting: ON

settings: SPARE timed LCD backlighting: OFF

/ not to be allocated: the same settings as

the MAIN ones apply

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APPENDIX A - Network data exchange

DESCRIPTION DIRECTION TIMING

Identification

commercial name relay--> centre ARplant identifier relay--> centre AR

direct voltage range relay--> centre AR

Setting data (main and spare)

settings in use relay--> centre--> relay ARdate of last change relay--> centre--> relay AR

time of last change relay--> centre--> relay AR

language in use relay--> centre--> relay ARrated frequency relay--> centre--> relay AR

direct rated voltage relay--> centre--> relay ARLCD setting relay--> centre--> relay AR

min. pulse width of end relay relay--> centre--> relay AR

timer t_X1 delay relay--> centre--> relay ARtimer t_X2 delay relay--> centre--> relay AR

timer t_X3 delay relay--> centre--> relay AR

first underresistance threshold included/excluded relay--> centre--> relay ARfirst underresistance threshold value relay--> centre--> relay AR

first underresistance threshold starting delay relay--> centre--> relay ARtrip delay per first underresistance threshold relay--> centre--> relay AR

second underresistance threshold included/excluded relay--> centre--> relay ARsecond underresistance threshold value relay--> centre--> relay AR

second underresistance threshold starting delay relay--> centre--> relay AR

trip delay for second underresistance threshold relay--> centre--> relay ARovercurrent threshold included/excluded relay--> centre--> relay AR

overcurrent threshold value relay--> centre--> relay ARovercurrent threshold starting delay relay--> centre--> relay AR

overcurrent threshold trip delay relay--> centre--> relay AR

first dir. undervoltage threshold included/excluded relay--> centre--> relay ARfirst dir. undervoltage threshold value relay--> centre--> relay AR

first dir. undervoltage threshold starting delay relay--> centre--> relay ARtrip delay for first dir. undervoltage threshold relay--> centre--> relay AR

second dir. undervoltage threshold included/excluded relay--> centre--> relay AR

second dir. undervoltage threshold value relay--> centre--> relay ARsecond dir. undervoltage threshold starting delay relay--> centre--> relay AR

trip delay for second dir. undervoltage threshold relay--> centre--> relay ARfirst dir. overvoltage threshold included/excluded relay--> centre--> relay AR

first dir. overvoltage threshold value relay--> centre--> relay AR

first dir. overvoltage threshold starting delay relay--> centre--> relay ARtrip delay for dir. overvoltage threshold relay--> centre--> relay AR

second dir. overvoltage threshold included/excluded relay--> centre--> relay ARsecond dir. overvoltage threshold value relay--> centre--> relay AR

second dir. overvoltage threshold starting delay relay--> centre--> relay AR

trip delay for second dir. overvoltage threshold relay--> centre--> relay AR

Present measurementsiresistance relay--> centre T e AR

direct voltage relay--> centre T e AR

alternating voltage relay--> centre T e ARalternating current relay--> centre T e AR

Maximum measurements

overcurrent relay--> centre AR

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Event log recorder

date / time of event relay--> centre VP and ARfirst underresistance threshold start relay--> centre VP and AR

first underresistance threshold trip relay--> centre VP and ARsecond underresistance threshold start relay--> centre VP and AR

second underresistance threshold trip relay--> centre VP and AR

overcurrent threshold start relay--> centre VP and ARovercurrent threshold trip relay--> centre VP and AR

alternating undervoltage threshold trip relay--> centre VP and ARalternating overvoltage threshold trip relay--> centre VP and AR

first direct overvoltage threshold start relay--> centre VP and AR

first direct undervoltage threshold trip relay--> centre VP and ARsecond direct undervoltage threshold start relay--> centre VP and AR

second direct undervoltage threshold trip relay--> centre VP and ARfirst direct overvoltage threshold start relay--> centre VP and AR

first direct overvoltage threshold trip relay--> centre VP and AR

second direct overvoltage threshold start relay--> centre VP and ARsecond direct overvoltage threshold trip relay--> centre VP and AR

state of digital input 1 relay--> centre VP and ARstate of digital input 2 relay--> centre VP and AR

state of digital input 3 relay--> centre VP and ARstate of timer tX_1 relay--> centre VP and ARstate of timer tX_2 relay--> centre VP and AR

state of timer tX_3 relay--> centre VP and AR

States

first underresistance threshold trip relay--> centre AV (a.p.)second underresistance threshold trip relay--> centre AV (a.p.)

undercurrent threshold trip relay--> centre AV (a.p.)alternating undervoltage threshold trip relay--> centre AV (a.p.)

alternating overvoltage threshold trip relay--> centre AV (a.p.)

first direct undervoltage threshold trip relay--> centre AV (a.p.)second direct undervoltage threshold trip relay--> centre AV (a.p.)

first direct overvoltage threshold trip relay--> centre AV (a.p.)

second overvoltage threshold trip relay--> centre AV (a.p.)state of digital input 1 relay--> centre AV (a.p.)

state of digital input 2 relay--> centre AV (a.p.)state of digital input 3 relay--> centre AV (a.p.)

state of timer tX_1 relay--> centre AV (a.p.)

state of timer tX_2 relay--> centre AV (a.p.)state of timer tX_3 relay--> centre AV (a.p.)

Locks

first underresistance threshold lock centre--> relay AV

second underresistance threshold lock centre--> relay AVovercurrent threshold lock centre--> relay AV

first direct undervoltage threshold lock centre--> relay AV

second direct undervoltage threshold lock centre--> relay AVfirst direct overvoltage threshold lock centre--> relay AV

second direct overvoltage threshold lock centre--> relay AV

Counterstotal trips of first underresistance threshold relay--> centre AR

partial trips of first underresistance threshold relay--> centre AR

total trips of second underresistance threshold relay--> centre ARpartial trips of second underresistance threshold relay--> centre AR

total trips of overcurrent threshold relay--> centre ARpartial trips of overcurrent threshold relay--> centre AR

total trips of first direct undervoltage threshold relay--> centre AR

partial trips of first direct undervoltage threshold relay--> centre ARtotal trips of second direct undervoltage threshold relay--> centre AR

partial trips of second direct undervoltage threshold relay--> centre ARtotal trips of first direct overvoltage threshold relay--> centre AR

partial trips of first direct overvoltage threshold relay--> centre AR

total trips of second direct overvoltage threshold relay--> centre ARpartial trips of second direct overvoltage threshold relay--> centre AR

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Events

date relay--> centre ARtime relay--> centre AR

tripped threshold relay--> centre ARresistance value relay--> centre AR

rated voltage value relay--> centre AR

Output relay

X1 setting relay--> centre--> relay ARX2 setting relay--> centre--> relay AR

X3 setting relay--> centre--> relay AR

X4 setting relay--> centre--> relay ARX5 setting relay--> centre--> relay AR

LED's

L1 setting relay--> centre--> relay AR

L2 setting relay--> centre--> relay ARL3 setting relay--> centre--> relay AR

L4 setting relay--> centre--> relay ARL5 setting relay--> centre--> relay AR

L6 setting relay--> centre--> relay ARL7 setting relay--> centre--> relay ARL8 setting relay--> centre--> relay AR

Digital inputs

input 1 setting relay--> centre--> relay AR

input 1 setting On HIGH/LOW relay--> centre--> relay ARinput 2 setting relay--> centre--> relay AR

input 2 setting setting On HIGH/LOW relay--> centre--> relay ARinput 3 setting relay--> centre--> relay AR

input 3 setting On HIGH/LOW relay--> centre--> relay AR

Diagnostics relay--> centre AV

ResetLED's centre--> relay AR

relay centre--> relay ARresettable counters centre--> relay AR

maximum measurements centre--> relay AR

Commands

output relays enabling centre--> relay AV and ARsettings switch centre--> relay AV

settings switch survival delay centre--> relay AR

Fault recorder

fault recorder starting parameters relay--> centre--> relay AR

fault recorder pretrigger delay relay--> centre--> relay ARfault recorder trigger command centre--> relay AR

fault recorder reset time centre--> relay ARfault recorder data relay--> centre AR

Clock

date centre--> relay S

time centre--> relay Sdate relay--> centre AR

time relay--> centre AR

KEYAR aperiodic message

AV (a.p.) aperiodic variable sent upon high-priority variationAV aperiodic variable transmitted upon variation

VP variable upon request

T periodic variable with periods programmable between 1 and 5 sS synchronization

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ALSTOM T&D Protection & Côntrole is bound by the foregoing specifications, dimensions and diagrams only after confirmation.

7/16/2019 Mx3IPG2A


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