Micrologic2.0 7.0 User Manual En

Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 ALow Voltage Products

User manual

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Micrologic control units

2.0 A, 5.0 A, 6.0 A and 7.0 A

Discovering your control unitIdentifying your control unit Overview of functions

22 4

Setting your control unitSelecting the type of neutral protection Setting procedure Setting the Micrologic 2.0 A control unit Setting the Micrologic 5.0 A control unit Setting the Micrologic 6.0 A control unit Setting the Micrologic 7.0 A control unit

1010 11 12 13 14 15

Fault and status indicationsResetting the fault indications and checking battery status Testing the earth-fault and earth-leakage functions

1616 17

MenusAccessing the menus Measuring phase currents Displaying the maximum current values Resetting the maximum current values Viewing the settings

1818 19 20 21 22

Technical appendixTripping curves Changing the long-time rating plug Zone selective interlocking (ZSI) Digital display Thermal memory

2424 26 27 28 29

1

Micrologic A

Schneider Electric

Discovering your control unit

Identifying your control unit Designations

All Compact NS800-3200 and Masterpact NT and NW circuit breakers are equipped with a Micrologic control unit that can be changed on site. Control units are designed to protect power circuits and connected loads.

Micrologic 2.0 A: basic protection and ammeterE51384A E51352AMicrologic 2.0 A

t

100 %

40 %

menu

long time

Ir .7 .6 .5 .4

.8

x In

tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

alarm

0

Ir

Isd

I

instantaneous

Isd

3 4 5 6 8 10 x Irsetting

2.5 2 1.5

Long time + Instantaneous

Micrologic 2.0 AE51385A

E51450A

Micrologic 5.0 A: selective protection and ammeterE51354Aalarm

Micrologic 5.0 A

t

X Y ZX: type of protection c 2 for basic protection c 5 for selective protection c 6 for selective + earth-fault protection c 7 for selective + earth-leakage protection Y: version number identification of the control-unit generation. "0" signifies the first generation. Z: type of measurement c A for "ammeter" c P for "power meter" c H for "harmonic meter" c no indication: no measurements

100 %

40 %

menu

long time

Ir .7 .6 .5 .4

.8

x In

tr (s) 4 8 12 .9 16 .95 2 .98 1 20 24 1 .5at 6 Ir

0instantaneous

Ir

Isd

Ii

I

short time

Isd 4 5 3 2.5 6 2 8 1.5 10 x Irsetting

tsd(s)

.4 .4 .30

Ii

on

.3 .2 .1

.2 .1

I tdelay

2

6 4 3 2

8 10 12 15 off x In

Long time + Short time + Instantaneous

Micrologic 6.0 A: selective + earth-fault protection and ammeterE51387A E51354A

t

E51395A

Micrologic 6.0 A

t

I t on100 %

2

40 %

I t off

2

menu

long time

Ir .7 .6 .5 .4 Isd

.8

x In

tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

alarm

0instantaneous

Ir

Isd

Ii

I

0

Ig

I

short time

3 2.5 2 1.5

4 5 6 8 10 x Ir

tsd(s)

on tg

.4 .4 . 3 .2 .3 .1 .2 .1 2 0I tdelay

Ii 4 3

6

8 10 12 15 off 2 x Intest

setting

Ig

D E F G C H B I Aground fault

(s)

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I t


Earth-fault protection

off

Micrologic 7.0 A: selective + earth-leakage protection and ammeterE51388A E51354A E51452AMicrologic 7.0 A

t

t

100 %

40 %

menu

long time

Ir .7 .6 .5 .4

.8

x In

tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

alarm

010 12 15 offtest

Ir

Isd

Ii

I

0

In

I

Isd 4 5 3 6 2.5 8 2 1.5 10 x Irsetting

short time

tsd(s)

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

Ii

instantaneous

6 4 3 2

8

off

x In

In 5 7 I 230 350 3 10 2 140 20 1 800 60 30 .5earth leakage


Earth-leakage protection

2

Micrologic A

Schneider Electric

Presentation

E51389A

1 2 3 4 5 6 7 8 9 10 11 12 13

top fastener bottom fastener protective cover cover opening point lead-seal fixture for protective cover long-time rating plug screw for long-time rating plug connection with circuit breaker infrared link with communications interfaces terminal block for external connections housing for battery digital display three-phase bargraph and ammeter

1 107. logic Micro 0A

31 12 11 13100 %

E51390A

9

30 29

40 %

7alarm

menuIr

time long

tr(s)

Adjustment dials 14 15 16 17 18 19 20 21 22 23 long-time current setting Ir long-time tripping delay tr short-time pickup Isd short-time tripping delay tsd instantaneous pick-up Isd instantaneous pick-up Ii earth-fault pick-up Ig earth-fault tripping delay tg earth-leakage pick-up In earth-leakage tripping delay t

.8 .9 .7 .95 .6 .98 .5 1 .4 x In

4

2 1 .5

8 12 16 20 24at

6 Ir

5 6 3 2Micrologic 7.0 AE51391A

48


24 25 26 27

28long time

Ir

Indications 24 25 26 27 28 LED indicating long-time tripping LED indicating short-time tripping LED indicating earth-fault or earth-leakage tripping LED indicating auto-protection tripping LED indicating an overload

Micrologic 7.0 A

14 1531

.7 .6 .5 .4

.8

tr(s) 4 .9 .95 2 .98 1 1 .5

8

alarm

x In

at 6 Ir

12 16 20 24

7

instantaneous

Isd


18

2.5 2 1.5

12

33

13100 %

Navigation 29 30 31 navigation button to change menus navigation button to view menu contents button for fault-trip reset and battery test 29 Test 14 32 33 test button for earth-fault and earth-leakage protection test connector 15 16 17 22 23Ir


40 %

28long time

14menu

Ir .7 .6 .5 .4

.8

30tralarm

15 16 17 19

x In

8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

tr

alarm

7

short time

instantaneous

long time

.7 .6 .5 .4

.8

x In

8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

28 7

Isd 3 4 5 6 2.5 8 2 1.5 10 x Irsetting

tsd(s)

on

. 4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

Ii 4 3

6 8 10 12 15 off 2 x In

short time

instantaneous

Isd 3 4 5 6 2.5 8 2 10 1.5 x Irsetting

tsd(s)

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

Ii 4 3

6

8

33

off

2 x In

10 12 15 offtest

19 32 33E51392A

In(A)

3

5

I 7

(ms)

230

350800

2 1 .5

10 140 20 30 60

Micrologic 6.0 A 15 14 17 16 21 20long time

earth leakage

Ir .7 .6 .5 .4

.8

x In

tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

alarm

28 7

short time

instantaneous

Isd 4 5 3 2.5 6 2 8 1.5 10 x Irsetting

tsd(s)

on tg

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

Ii 6 4 3 2

off

10 12 15 off x Intest

8

19 32 33

Ig D C B A

E

F G H I

(s)

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I t

off

ground fault

3

Micrologic A

Schneider Electric


Overview of functions Current protection

Protection settingsDepending on the type of installation, it is possible to set the tripping curve of your control unit using the parameters presented below. Micrologic 2.0 AE51358A

t 1

2

3 0 Ir Isd I

1. current setting Ir (long time) 2. tripping delay tr (long time) for 6 x Ir 3. pick-up Isd (instantaneous) Micrologic 5.0 A, 6.0 A, 7.0 AE51359A E51386A


Micrologic 7.0 At

t

1I t on2

tI t on2

2I t off2

3 4 5 0 Ir Isd Ii I

1 2

I t off

2

1 2

0

Ig

I

0

In

I

1. current setting Ir (long time) 2. tripping delay tr (long time) for 6 x Ir 3. pick-up Isd (short time) 4. tripping delay tsd (short time) 5. pick-up Ii (instantaneous)

1. pick-up Ig (earth fault) 2. tripping delay tg (earth fault)

1. pick-up In (earth leakage) 2. tripping delay t (earth leakage)

Long-time protectionThe long-time protection function protects cables (phases and neutral) against overloads. This function is based on true rms measurements. Thermal memory The thermal memory continuously accounts for the amount of heat in the cables, both before and after tripping, whatever the value of the current (presence of an overload or not). The thermal memory optimises the long-time protection function of the circuit breaker by taking into account the temperature rise in the cables. The thermal memory assumes a cable cooling time of approximately 15 minutes. Long-time current setting Ir and standard tripping delay tr

Micrologic control unitcurrent setting tripping between 1.05 and 1.20 x Ir time delay (s) accuracy: 0 to -20 % Ir = In x (*)

2.0 A and 5.0 A0.4 0.5 0.6 0.7 0.8 0.9 0.95 other ranges or disable by changing rating plug 12.5 0.5 0.34 25 1 0.69 50 2 1.38 100 4 2.7 200 8 5.5 300 12 8.3 400 16 11 0.98 1

tr at 1.5 x Ir tr at 6 x Ir tr at 7.2 x Ir

500 20 13.8

600 24 16.6

* In: circuit breaker rating

Setting accuracy of the Ir setting may be enhanced by using a different long-time rating plug. See the technical appendix "Changing the long-time rating plug".

4

Micrologic A

Schneider Electric

For the characteristics and external wiring of the zone selective interlocking function, see the technical appendix on "Zone selective interlocking". The portable test kit can be used to test the wiring between circuit breakers for the zone selective interlocking function.

Short-time protectionc the short-time protection function protects the distribution system against impedant short-circuits c the short-time tripping delay can be used to ensure discrimination with a downstream circuit breaker c this function carries out true rms measurements. c the I2t ON and I2t OFF options enhance discrimination with downstream protection devices c use of I2t curves with short-time protection: v I2t OFF selected: the protection function implements a constant time curve; v I2t ON selected: the protection function implements an I2t inverse-time curve up to 10 Ir. Above 10 Ir, the time curve is constant. c zone selective interlocking (ZSI) The short-time and earth-fault protection functions enable time discrimination by delaying the upstream devices to provide the downstream devices the time required to clear the fault. Zone selective interlocking can be used to obtain total discrimination between circuit breakers using external wiring. Short-time pick-up Isd and tripping delay tsd

Micrologic control unitpick-up accuracy 10 % time delay (ms) at 10 Ir I2t ON or I2t OFF Isd = Ir x settings I2t OFF I2t ON tsd (max resettable time) tsd (max break time)

2.0 A, 5.0 A, 6.0 A and 7.0 A1.5 0 20 80 2 0.1 0.1 80 140 2.5 0.2 0.2 140 200 3 0.3 0.3 230 320 4 0.4 0.4 350 500 5 6 8 10

Instantaneous protectionc the instantaneous-protection function protects the distribution system against solid short-circuits. Contrary to the short-time protection function, the tripping delay for instantaneous protection is not adjustable. The tripping order is sent to the circuit breaker as soon as current exceeds the set value, with a fixed time delay of 20 milliseconds. c this function carries out true rms measurements. Instantaneous pick-up Isd

Micrologic control unitpick-up accuracy 10 % Isd = Ir x

2.0 A1.5 2 2.5 3 4 5 6 8 10

Instantaneous pick-up Ii

Micrologic control unitpick-up accuracy 10 % li = In x (*)

5.0 A, 6.0 A and 7.0 A2 3 4 6 8 10 12 15 OFF

* In: circuit-breaker rating

5

Micrologic A

Schneider Electric


Overview of functions Current protection

Protection of the fourth pole on four-pole circuit breakersProtection of the neutral conductor depends on the distribution system. There are three possibilities.

Type of neutralNeutral unprotected Neutral protection at 0.5 In

Description.The distribution system does not require protection of the neutral conductor. The cross-sectional area of the neutral conductor is half that of the phase conductors. c the long-time current setting Ir for the neutral is equal to half the setting value c the short-time pick-up Isd for the neutral is equal to half the setting value c the instantaneous pick-up Isd (Micrologic 2.0 A) for the neutral is equal to half the setting value c the instantaneous pick-up Ii (Micrologic 5.0 A / 6.0 A / 7.0 A) for the neutral is equal to the setting value. The cross-sectional area of the neutral conductor is equal to that of the phase conductors. c the long-time current setting Ir for the neutral is equal to the setting value c the short-time pick-up Isd for the neutral is equal to the setting value c the instantaneous pick-ups Isd and Ii for the neutral are equal to the setting value.

Neutral protection at In

Earth-fault protection on Micrologic 6.0 Ac an earth fault in the protection conductors can provoke local temperature rise at the site of the fault or in the conductors. The purpose of the earth-fault protection function is to eliminate this type of fault. c there are two types of earth-fault protection.

TypeResidual

Descriptionc the function determines the zero-phase sequence current, i.e. the vectorial sum of the phase and neutral currents c it detects faults downstream of the circuit breaker. c using a special external sensor, this function directly measures the fault current returning to the transformer via the earth cable c it detects faults both upstream and downstream of the circuit breaker c the maximum distance between the sensor and the circuit breaker is ten metres.

Source Ground Return

c earth-fault and neutral protection are independent and can therefore be combined. Earth-fault pick-up Ig and tripping delay tg The pick-up and tripping-delay values can be set independently and are identical for both the residual and "source ground return" earth-fault protection functions.

Micrologic control unitpick-up accuracy 10 % time delay (ms) at 10 In (*) I2t ON or I2t OFF Ig = In x (*) In 400 A 400 A < In 1200 A In > 1200 A settings I2t OFF I2t ON tg (max resettable time) tg (max break time)

6.0 AA 0.3 0.2 500 A 0 20 80 B 0.3 0.3 640 A 0.1 0.1 80 140 C 0.4 0.4 720 A 0.2 0.2 140 200 D 0.5 0.5 800 A 0.3 0.3 230 320 E 0.6 0.6 880 A 0.4 0.4 350 500 F 0.7 0.7 960 A G 0.8 0.8 1040 A H 0.9 0.9 1120 A I 1 1 1200 A

* In: circuit-breaker rating

6

Micrologic A

Schneider Electric

Current protection and alarms

Earth-leakage protection on Micrologic 7.0 Ac the earth-leakage protection function primarily protects people against indirect contact because an earth-leakage current can provoke an increase in the potential of the exposed conductive parts. The earth-leakage pick-up value In is displayed directly in amperes and the tripping delay follows a constant-time curve c an external rectangular sensor is required for this function c this function is inoperative if the long-time rating plug is not installed c d protected against nuisance tripping. c k DC-component withstand class A up to 10 A. Pick-up value In and tripping delay t

Micrologic control unitpick-up accuracy 0 to - 20 % time delay (ms) In

7.0 A0.5 1 2 3 5 7 10 20 30

settings t (max resettable time) t (max break time)

60 140

140 200

230 320

350 500

800 1000

Overload LEDE51398Along time

Ir .7 .6 .5 .4

.8

x In

tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5at 6 Ir

alarm

short time

instantaneous

Isd 4 5 3 2.5 6 2 8 1.5 10 x Irsetting

tsd(s)

on t(ms)

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

Ii 4 3

6 8 10 12 15 2 off x Intest

100 %

In(A)

3

5

7

230

350800

40 %

2 1 .5

10 140 20 30 60

earth leakage

This LED signals that the long-time current setting Ir has been overrun.

The auto-protection function (excessive temperature or short-circuit higher than circuit-breaker capacity) opens the circuit breaker and turns on the Ap LED. Caution. If the circuit breaker remains closed and the Ap LED remains on, contact the Schneider after-sales support department. Caution. The battery maintains the fault indications. If there are no indications, check the battery.

Fault indicationsSignals tripping due to an overrun of the long-time current setting Ir. Signals tripping due to an overrun of the short-time pick-up Isd or the instantaneous pick-up Isd / Ii.E51400A

E51399A

Micrologic 7.0 A

Micrologic 7.0 A

Signals tripping due to an overrun of the earth-fault pick-up Ig or the earthleakage pick-up In.E51401A

Signals tripping due to the auto-protection function of the control unit.E51402A

Micrologic 7.0 A

Micrologic 7.0 A

7

Micrologic A

Schneider Electric


Overview of functions Ammeter measurements

If no information is displayed on the screen, see the technical appendix "Digital display".

c all Micrologic control units measure the true rms value of currents c the most heavily loaded phase is continuously displayed on the digital screen c using the navigation buttons, it is possible to display successively the I1, I2, I3, neutral IN, Ig, IN and stored-current (maximeter) values c the percent load on each phase is displayed. A bargraph displays the currents measured on phases 1, 2 and 3 as a percentage of the long-time current setting Ir.E60371A

100 %

40 %

1.125 x Ir 1 x Ir 0.8 x Ir 0.6 x Ir 0.4 x Ir

8

Micrologic A

Schneider Electric

9

Micrologic A

Schneider Electric

Setting your control unit

Selecting the type of neutral protection

On four-pole circuit breakers, it is possible to select the type of neutral protection for the fourth pole: c neutral unprotected (4P 3D); c neutral protection at 0.5 In (3D + N/2); c neutral protection at In (4P 4D).E51383A

3D+N 4P 3D

/2 4P 4D

10

Micrologic A

Schneider Electric

Setting procedure

Setting procedure1. Open the protective cover.E51410A E51411A

Micro

logic

7.0 AMicro

logic

7.0 A

Ir=

A

100 %

100 %

40 %

40 %

menu

1

menu

2

2. Select the desired setting. The set value is automatically displayed on the digital screen in absolute value with the relevant units. c Current in amperes (A and kA); c Tripping delays in seconds.

E51412A

Microlo

gic 7.0

A

3. If no information is displayed, see the technical appendix "Digital display". If no further action is taken, after a few seconds, the display returns to the main menu for current measurements. 4. Close the protective cover and, if necessary, install a lead seal to protect the settings.

100 %

40 %

menu

3

See the user manual for the portable test kit

Using the portable test kitTo test the control unit, connect the portable test kit via the test connector.

E51410A

Micro

logic

7.0 A

E51413A

Micro

logic

7.0 A

100 %

100 %

40 %

40 %

menu

1

menu

2

11

Micrologic A

Schneider Electric


Setting the Micrologic 2.0 A control unit

E60365A

The rating of the circuit breaker in this example is 2000 A.E51366A

Set the threshold valueslong time

Ir .7 .6 .5 .4 Isd

.8

alarm

In = 2000 A Ir = 0.7 x In = 1400 A Isd = 3 x Ir = 4200 A

x In

.9 .95 .98 1

instantaneous

1

3 4 5 2.5 6 2 8 10 1.5 x Irsetting

In = 2000 AIn = 2000 A

E51368A

See pages 4 and 5 for information on the available settings

t Ir

Isd 0 I

Set the tripping delayE60366A

long time

tr(s)

4

8

alarm

tr = 1 second

2 1 .5

at 6 Ir

12 16 20 24

E51370A

t

tr

0

I

12

Micrologic A

Schneider Electric


E60367A



In = 2000 Aalarm

Ir

.8 .9 .95 .6 .98 .5 .4 1 x In .7short time

Ir = 0.7 x In = 1400 A Isd = 2 x Ir = 2800 Ainstantaneous

Ii = 3 x In = 6000 A

Isd 2.5 2


Ii

1.5

1

6 8 10 4 12 3 15 2 off x In

In = 2000 AIn = 2000 A

See pages 4 and 5 for information on the available settingsE60368A

Set the tripping delaylong time

Thresholds I2t ON curveE51373A E51372A

tr

I2t OFF curvet Irshort time

(s)

t

Ir

8 12 16 2 1 20 24 .5 4at 6 Ir

alarm

tr = 1 second

tsd = 0.2 seconds

tsd(s)

Isd Ii 0 I 0

Isd Ii I

on

.4 .4 .3 .2 .3 .2 .1 .1 2 0I tdelay

I2t on

I2t off

Tripping delays I2t ON curveE51376A

I2t OFF curveE51375A

t

t

tr

tr

tsd

tsd

0

I

0

I

13

Micrologic A

Schneider Electric



E51414A



Ir .7 .6 .5 .4

.8

alarm

x In

.9 .95 .98 1 Iiinstantaneous

In = 2000 A Ir = 0.7 x In = 1400 A

Isd 3 4 5 6 2.5 2 8 1.5 10 x Ir

short time

4 3

6 8 10 12 15 2 x In offtest

Isd = 2 x Ir = 2800 A Ii = 3 x In = 6000 A B Ig = 640 A

1Ig C B

setting

D E F

In = 2000 AIn = 2000 A

G H A I

ground fault

See pages 4 to 6 for information on the available settings.E60372A


Thresholds I2t ON curveE51373A E51372A

tr(s) 4

8

alarm

I2t OFF curvet Irshort time

t

2 1 .5 tsd(s)

Ir

at 6 Ir

12 16 20 24

tr = 1 second

Isd Ii 0E51416A

Isd Ii IE51415A

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

tsd = 0.2 secondsI2t ontest

off

I2t off

0

I

tg(s)

.4 .4 .32

t

t

.3 .2 .1onground fault

.2 .1

I t

0 off

tg = 0.2 seconds

Ig

Ig

0

I

0

I



t

t

tr

tr

tsd

tsd

0E51419A

IE51418A

0 t

I

t

tg

tg

0

I

0

I

14

Micrologic A

Schneider Electric


E51420A



Ir .7 .6 .5 .4

.8 .9 .95 .98 x In 1 Ii

alarm

In = 2000 A Ir = 0.7 x In = 1400 Ainstantaneous

Isd 3 4 5 6 2.5 2 8 1.5 10 x Ir

short time

Isd = 2 x Ir = 2800 A Ii = 3 x In = 6000 A In = 1 A

6 8 10 4 12 3 15 off 2 x Intest

1

setting

In(A)

3 5 7 10 20 30

In = 2000 AIn = 2000 A

2 1 .5

ground fault

See pages 4 to 7 for information on the available settings.E60373A


Thresholds I2t ONE51373A

tr

(s)

curveE51372A

I2t OFFt Ir

curve

t

Ir

4 8 12 16 2 20 1 24 .5at 6 Ir

alarm

tr = 1 second

short time

tsd(s)

Isd Ii 0E51421A

Isd Ii I 0 I

on

.4 .4 .3 .2 .3 .1 .2 .1 2 0I tdelay

tsd = 0.2 seconds

offtest

I2t on

I2t off

t

(ms) 230

350800

t

140 60ground fault

t = 140 milliseconds

In

0

I



t

t

tr

tr

tsd

tsd

0E51423A

I

0

I

t

t

0

I

15

Micrologic A

Schneider Electric

Fault and status indications

Resetting the fault indications and checking battery status

The procedure for closing the circuit breaker following a fault trip is presented in the circuit-breaker user manual.E51439A

Resetting the fault indicationsc determine why the circuit breaker tripped. The fault indication is maintained until it is reset on the control unit. v press the fault-trip reset button.Micrologic 7.0 A

v check the parameter settings of the control unit.

Checking the batteryE51440A

Micrologic 7.0 A

Press the battery-test button (same as the fault-trip reset button) to display the battery status.E51441A

Battery fully charged Battery half charged Change the batteryIf no information is displayed, either: c no battery is installed in the control unit, or; c an auxiliary power supply is required. See the technical appendix "Digital display".

E51442A

100 %

40 %

3. Insert a new battery. Check the polarity.

E51443A

If the battery needs to be changed, please use the one with Schneider catalogue number 33593 (characteristics given on the battery compartment cover).

Changing the control-unit battery1. Remove the battery cover. 2. Remove the battery.

4. Put the cover back in place. Press the batterytest button to check the new battery.E51445A

E51444A

+

100 %

40 %

16

Micrologic A

Schneider Electric

Testing the earth-fault and earthleakage functions

Charge and close the circuit breaker. Using a screwdriver, press the test button for earth-fault and earth-leakage protection. The circuit breaker should open.E51410A E51456A

Micro

logic

7.0 A

7.0 logic Micro

A

100 %

100 %

40 %

40 %

menu

1

menu

2

If the circuit breaker does not open, contact the Schneider after-sales support department.

17

Micrologic A

Schneider Electric

Menus

Accessing the menus

Symbols used:E51404A

Briefly press a key.E51405A

Three menus may be accessed on Micrologic control units, providing the following information: c phase current measurements I1, I2, I3, neutral IN, earth-fault current Ig on the Micrologic 6.0 A control unit and earth-leakage current In on the Micrologic 7.0 A control unit; c maximeter current values for phases I1, I2, I3, neutral IN, the maximum earthfault current Ig on the Micrologic 6.0 A control unit and the maximum earth-leakage current In on the Micrologic 7.0 A control unit; c protection settings and tripping delays. 1. MeasurementsE51406A E51407A

2. MaximeterMax AE51408A

3. Settings

Press and hold a key.

A

Ir=

A

It is possible at any time to stop consulting a current measurement, a maximum current value recorded by the maximeter or the setting values. After a few seconds, the Micrologic control unit automatically returns to the main menu displaying the current value of the most heavily loaded phase. The protection settings can be displayed directly on the digital display.

100 %

100 %

100 %

40 %menu

40 %menu

40 %menu

Press the "menu" button to access the maximum current values measured by the maximeter. 4. The system returns to the main "Measurements" menu.E51409A

Press the "menu" button to access the protection settings and tripping delays.

Press the "menu" button to return to the current measurements.

A

100 %

40 %

18

Micrologic A

Schneider Electric

Measuring phase currents

Current values may be read in the "Measurements" menu, which is also the main menu. If no particular action is taken, the system displays the current value of the most heavily loaded phase."Measurements" menu Phase 1 is the most heavily loaded.E51409A

Display of current I1.E51425A E51426A

Display of current I2.

A

A

100 %

100 %

A

40 %

40 %

100 %

Press the "arrow" button to go on to current I2.

Press the "arrow" button to go on to current I3.

40 %E51427A

Display of current I3.E51429A

Display of current IN.

A

A

100 %

100 %

40 %

40 %

Press the "arrow" button to go on to current IN if the circuit breaker is connected to the neutral.

Press the "arrow" button to go on to the earth-fault current Ig or the earthleakage current In.

Display of current Ig (Micrologic 6.0 A) or current In (Micrologic 7.0 A).E51428A E51409A

The system returns to the display of current I1.

A

A

100 %

100 %

40 %

40 %

Press the "arrow" button to return to current I1.

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Schneider Electric

Menus

Displaying the maximum current values

E51430A

MAX A

E51431A

Maximum current values may be read in the "Maximeter" menu. If no particular action is taken, the system returns to the main menu.

Display of the maximum I1 current.

Display of the maximum I2 current.MAX A

"Maximeter" menu.E51407A

Max A

100 %

100 %

40 %

40 %

100 %

Press the "arrow" button to go on to the maximum I2 current. Display of the maximum I3 current.E51432A

Press the "arrow" button to go on to the maximum I3 current. Display of the maximum IN current.E51434A

40 %menu

MAX A

MAX A

100 %

100 %

40 %

40 %

Press the "arrow" button to go on to the maximum IN current if the circuit breaker is connected to the neutral.

Press the "arrow" button to go on to the maximum earth-fault current Ig (Micrologic 6.0 A) or the maximum earth-leakage current In (Micrologic 7.0 A) The system returns to the display of the maximum I1 current.E51435A

Display of the maximum Ig current or the maximum In current.E51433A

MAX A

MAX A

100 %

100 %

40 %

40 %

Press the "arrow" button to return to the maximum I1 current.

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Micrologic A

Schneider Electric

Resetting the maximum current values

Maximum current values can be reset using the "Maximeter" menu.E51436A

Select the maximum current value to be reset (e.g. I2 max.).E51437A

Reset.

Select another value to reset or return to the main menu.E51438A

If no particular action is taken, the system returns to the main menu.

MAX A

MAX A

MAX A

"Maximeter" menu.E51407A

Max A

100 %

100 %

100 %

40 %100 %

40 %

40 %

40 %menu

Press the "arrow" button as many times as required to select I2 max.

Press and hold the "arrow" button down for three to four seconds. The current value flashes during the reset, then changes to the present value (the new maximum).

Press the "arrow" button as many times as required to select another maximum value to reset or return to the main menu.

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Schneider Electric

Menus

Viewing the settings

Micrologic control unit 2.0 A 5.0 A 6.0 A 7.0 AE60374A

Long-time current setting Ir

menu

Select the "Settings" menu. The Ir value is the first displayed.

Ir=

A

Long-time tripping delay tr

Press the "arrow" button to go on to the tr value.

tr=

s

Short-time pick-up Isd

Press the "arrow" button to go on to the short-time Isd value.

Isd=

A

Short-time tripping delay tsd

Press the "arrow" button to go on to the tsd value.

tsd=

s

Instantaneous pick-up Isd

Press the "arrow" button to go on to the instantaneous Isd value. Or

Isd=

A

Instantaneous pick-up Ii

the instantaneous Ii value.Ii=

A

Earth-fault pick-up Ig

Press the "arrow" button to go on to the Ig value.Ig=

A

Or

Earth-leakage pick-up In

the In value.

In=

A

Earth-fault tripping delay tg

Press the "arrow" button to go on to the tg value.

stg=

Or

Earth-leakage tripping delay t

the t value.

t=

s

Press the "arrow" button to return to the beginning of the menu.

Ir=

A

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Micrologic A

Schneider Electric

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Micrologic A

Schneider Electric

Technical appendix

Tripping curves

Long-time and instantaneous protection (Micrologic 2.0 A)E60369A

10 000 5 000 2 000 1 000 500 200 100 50 20 10 5 t(s) 2 1 .5 .2 .1 .05 .02 .01 .005 .002 .001 .5 .7 1

Ir = 0.41 x In

tr = 0.524 s

Isd = 1.510 x Ir

2

3 4 5 7 10 I / Ir

20 30

50 70 100

200 300

Long-time, short-time and instantaneous protection (Micrologic 5.0 A, 6.0 A and 7.0 A)E60370A

10 000 5 000 2 000 1 000 500 200 100 50 20 10 5 t(s) 2 1 .5 .2 .1 .05 .02 .01 .005 .002 .001 .5 .7 10.4 0.3 0.2 0.1 0

Ir = 0.41 x In

tr = 0.524 s

Isd = 1.510 x Ir I2t ON0.4 0.3

I2t OFF

0.2 0. 1 0

Ii = 215 x In . OFF (1)

2

3 4 5 7 10 x Ir

20

3

5

7 10 x In

20 30

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Micrologic A

Schneider Electric

Earth-fault protection (Micrologic 6.0 A)E46266A

10 000 5 000 2 000 1 000 500 200 100 50 20 10 5 t(s) 2 1 .5 .2 .1 .05 .02 .01 .005 .002 .001 .05.07 .1It2

Ig = AJ x In (1) 1200 A max.

I2t ON

0.4 0.3 0.2 0.1 0

0.4 0.3 0.2 0.1 0

OFF

.2 .3 .4 .5 .7 1 I / In

2

3

5

7 10

200 300

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Micrologic A

Schneider Electric

Technical appendix

Changing the long-time rating plug

Select the long-time rating plugA number of setting ranges for the long-time current setting are available on Micrologic A control units by changing the long-time rating plug. The available rating plugs are listed below.

Part number33542 33543 33544 33545

Setting range for the Ir valuestandard low setting high setting without long-time protection 0.4 to 1 x Ir 0.4 to 0.8 x Ir 0.8 to 1 x Ir

Caution. Following any modifications to the longtime rating plug, all control-unit protection parameters must be checked.

Change the long-time rating plugProceed in the following manner. 1. Open the circuit breaker. 2. Open the protective cover of the control unit.E51378A E51379AAMicro

3. Completely remove the long-time rating plug screw.

7.0 logic Micro

logic

7.0 A

100 %

100 %

40 %

40 %

menu

menu

Caution. If no long-time rating plug is installed, the control unit continues to operate under the following downgraded conditions: c the long-time current setting Ir is 0.4; c the long-time tripping delay tr corresponds to the value indicated by the adjustment dial; c the earth-leakage protection function is disabled.

4. Snap out the rating plug.E51380A E51381A

5. Clip in the new rating plug.

Micro

logic

7.0 A

Micro

logic

7.0 A

100 %

100 %

40 %

40 %

menu

menu

alarm long time

alarm long time

tr(s)

Ir

.8 .9 .7 .95 .6 .98 .5 1 .4 x In

4

2 1

.5 @ 6 Ir

8 12 16 20 24

tr(s)

Ir

.8 .9 .7 .95 .6 .98 .5 1 .4 x In

4

2 1

.5 @ 6 Ir

8 12 16 20 24

6. Refit the screw for the long-time rating plug.

7. Check and/or modify the control-unit settings.

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Schneider Electric

Zone selective interlocking (ZSI)

E51397A

Operating principlec A fault occurs at point A. Downstream device no. 2 clears the fault and sends a signal to upstream device no. 1, which maintains the short-time tripping delay tsd or the earth-fault tripping delay tg to which it is set. c A fault occurs at point B. Upstream device no. 1 detects the fault. In the absence of a signal from a downstream device, the upstream device immediately trips without taking into account its tripping-delay settings. If it is connected to a device even further upstream, it sends a signal to that device, which delays tripping according to its tsd or tg setting.Note : On a circuit breaker likely to receive a ZSI signal, the tsd and tg tripping delays must not be set to zero, as this would make discrimination impossible.

1

B

2

A

Connections between control unitsA logic signal (0 or 5 volts) can be used for zone selective interlocking between the upstream and downstream circuit breakers. c Micrologic 5.0 A, 6.0 A, 7.0 A. c Micrologic 5.0 P, 6.0 P, 7.0 P. c Micrologic 5.0 H, 6.0 H, 7.0 H.

Caution. If the protection function is not used on circuit breakers equipped for ZSI protection, a jumper must be installed to short terminals Z3, Z4 and Z5. If the jumper is not installed, the short-time and earth-fault tripping delays are set to zero, whatever the position of the adjustment dial.

Wiringc maximum impedance: 2.7 / 300 metres c capacity of connectors: 0.4 to 2.5 mm2 c maximum cross-sectional area of wires (including insulation): 3.5 mm2 c wires: single or multicore c maximum length: 3000 metres c limits to device interconnection: v the common ZSI - OUT - SOURCE (Z1) and the output ZSI - OUT (Z2) can be connected to a maximum of 10 inputs; v a maximum of 100 devices may be connected to an input ZSI IN CR (Z4) or GF (Z5) c connections are made from the output ZSI - OUT (Z2) on the downstream device to the input(s) ZSI - IN - ST (Z4) and/or GF (Z5) on the upstream device.

Terminals Z1 to Z5 correspond to the identical indications on the circuit-breaker terminal blocks.

E60375A

and/orZ1 Z2 Z3 Z4 Z5

Terminal block for external connections

Upstream circuit breakerand/orZ1 Z2 Z3 Z4 Z5


Z1 Z2 Z3 Z4 Z5


Downstream circuit breaker

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Micrologic A

Schneider Electric

Technical appendix

Digital display

For information on connecting an external power supply, see the electrical diagrams in the circuit-breaker user manual.

c display of measurements operates without an external power supply. The digital display goes off if the current drops below 0.2 x In (In = rated current). c display back-lighting is disabled in the following situations: v current less than 1 x In on one phase; v current less than 0.4 x In on two phases; v current less than 0.2 x In on three phases. c the maximeter does not operate for currents under 0.2 x In. These three functions may be maintained by adding an external power supply. Even if an external power supply is installed, the long-time, short-time, instantaneous and earth protection functions will not use it.

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Micrologic A

Schneider Electric

Thermal memory

Thermal memoryThe thermal memory is a means to simulate temperature rise and cooling caused by changes in the flow of current in the conductors. These changes may be caused by: c repetitive motor starting; c loads fluctuating near the protection settings; c repeated circuit-breaker closing on a fault. Control units without a thermal memory (contrary to bimetal strip thermal protection) do not react to the above types of overloads because they do not last long enough to cause tripping. However, each overload produces a temperature rise and the cumulative effect can lead to dangerous overheating. Control units with a thermal memory record the temperature rise caused by each overload. Even very short overloads produce a temperature rise that is stored in the memory. This information stored in the thermal memory reduces the tripping time.

Micrologic control units and thermal memoryAll Micrologic control units are equipped as standard with a thermal memory c for all protection functions, prior to tripping, the temperature-rise and cooling time constants are equal and depend on the tripping delay in question: v if the tripping delay is short, the time constant is low; v if the tripping delay is long, the time constant is high. c for long-time protection, following tripping, the cooling curve is simulated by the control unit. Closing of the circuit breaker prior to the end of the time constant (approximately 15 minutes) reduces the tripping time indicated in the tripping curves.

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Schneider Electric Industries SA5, rue Nadar 92506 Rueil-Malmaison Cedex France Tel: +33 (0)1 41 29 82 00 Fax:+33 (0)1 47 51 80 20http://www.schneiderelectric.com

As standards, specifications and designs develop from time, always ask for confirmation of the information given in this publication. This document has been printed on ecological paper.Designed by: HeadLines Printed by:

04443724AA-A

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