1s20 Application

8/12/2019 1s20 Application

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THE RELAY SPECIALISTS

relay monitoring systems pty ltd www.rmpl.com.au

1S20

Arc Fault Monitor


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1S20

Arc Fault Monitor


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1S20

Arc Fault Monitor

Electrical arc short circuits in metal clad switchgear and low

voltage panels may occur for many different reasons. defective or ageing insulating materials

poor bus or cable connections

poor maintenance human error

ingress of moisture, dust or vermin

abnormal service conditions


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Arc Fault

Effects and Consequences

ENERGY RELEASED BY ARC FAULTENERGY RELEASED BY ARC FAULT

PRESSURE

RISE

TEMPERATURE

RISE

VISUAL &

ACCOUSTIC

PHENOMENA

EFFECTS OF

FAULT ARC

CONSEQUENCES

FOR PLANT

MECHANICAL

STRESSING OF

ENCLOSURES

THERMAL STRESSING,

MELTING, FIRE

VAPOURISATION

CONSEQUENCES

FOR PERSONNEL

SHOCK WAVE,

FLYING DEBRIS,

OPENING PANELS

U/V BURNS &

EJECTION OF

FLAMES & HOT

GASES & SMOKE


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Switchgear Failure

Effects and Consequences


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Switchgear Internal Fault

Example

FAULT TIME

PROTECTION

TRANSFORMER

2 secs

OC-relay

110/22 kV

30 MVA


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Switchgear Internal Fault

Example

FAULT TIME

PROTECTION

TRANSFORMER

0.07 secs

Arc protection

110/22 kV

30 MVA


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Variable Speed Drive

Fault Example

PROTECTION

TRANSFORMER

Earth leakage

22 kV / 690V

Water CorporationWestern Australia

At approximately 0800 hrs on 25/2/07 No.2 VSDfailed at Tamworth Pumping Station WA. The

PSN electrician was called out to the fault later

that same morning and found the main switch

compartment of the drive badly damaged.

The extent of damage is quite severe and wascontained to the main switch compartment of the

variable speed drive.

The majority of damage appears to have been

originated from the VSD main switch, then

spreading upon explosion to the upper and rear of

the drive and also externally through the

ventilation ducts.


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Fault Example

The earth leakage protection on the #2

VSD 22kV / 690V feeder tripped.

The O/C protection also detected a phase

fault condition.

#2 22kV / 690V Transformer circuit breaker

was found to be in the OFF position.

Judging by the extent of the damage the

protection clearly did not respond quickly

enough.


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Fault Example


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Fault Example

OPERATOR HAZARD IN ADJACENT CORRIDOR


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Fault Example1S20 ARC FAULT PROTECTION INSTALLED AFTER EARLIER FAULT


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Fault ExampleSUBSEQUENT FAULT

As a result of this incident, RMS 1S20 ArcFault Monitors and 1S30 Arc Flash Sensors

were installed.

Subsequently several months later another

incident occurred, this time due to the failure

of the IGBT board.

As a consequence, the arc sensors were

triggered by tripping the 22kV circuit breaker

and as can be seen by the photos the

damage was insignificant.

1S30 ARC

SENSOR

ARC FAULT


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Fault ExampleSUBSEQUENT FAULT

ARC FAULT


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1S20

Arc Fault Monitor

The degree of damage caused by arcing

depends principally on the duration of the arc.

~100ms Arc Fault Duration

The switchgear needs to be checked & the

insulation resistance measured before power

can be re-established.


The power supply will be interrupted; the

switchgear must be checked; power is re-

established only after minor repairs.


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1S20

Arc Fault Monitor



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1S20

Arc Fault Monitor

The degree of damage caused by arcing

depends principally on the duration of the arc.


The supply is interrupted, metal parts of the

switchgear are destroyed & poisonous gases

are emitted.

~1s Arc Fault Duration

Destroys most of the switchgear & may cause a

fire, injury to personnel & damage to property.


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1S20

Arc Fault Monitor



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1S20

Arc Fault Monitor

Arguably the greatest risk of arc fault damage

exists at the CB cable termination & in the CB

chamber itself due to the slow clearance times

of the IDMT feeder protection.

The problem of arc faults is most prevalent in

older metal clad switchgear, which already has

operational protection systems.

The CB cable termination is particularly at risk to

ingress of moisture & rodent damage.


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System Integration

Trip on arc fault


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Single Line Diagram

1S30

1S20

Cable box only

Trip on Arc Fault


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System Integration

With current check using high speed starter element

Type: 1S20K1 [C] Vx: 48V DCSerial No: 126578

1S20 Arc Fault Monitor

ARC FAULT TRIP INITIATE

CBARC FAULT

MONITORSENSOR

OVER-CURRENT RELAY3 Pole OC + EF

RESET / TEST

System FunctioningArc Fault TripSystem ServiceDC Fail

GREEN:RED:

ORANGE:DARK:


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Single Line Diagram

Cable box and CT chamber

1S30

1S30

1S20

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Single Line Diagram

1S20

1S30

1S30

1S30

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Trip BUS CB(s)

Cable box, CT and CB chamber


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1S20 with 1S30 Optical Sensors


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1S30

Arc Sensor Installation

Mounting position of the

Sensor is not critical.

High sensitivity in

direction of View


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1S20 System Testing

Use camera flash to check operation of

arc sensor and pick up of 1S20 trip

contact.

Typical operating range of flash to arcsensor is 50 to 300mm


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1S20 System Testing

CRO trace showing nominal operation time of the trip contacts.

First contact touch at 6.25ms and fully closed by 7.25ms.


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1S30


1S30 shown mounted on the outside of a switchgear panel

Detector oriented to look through a hole into the switchgear

Switchgear

panel

2 x M4self threading

mounting screws(Supplied)

Sealed cable

stress relief

Optical detectorprotruding through

hole in panel


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1S30


1S30 shown mounted on the inside of a switchgear panel

Detector oriented to look out into the switchgear compartment



Optical detectorfacing awayfrom panel


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1S30


The dual optical detector version can be panel mounted

to monitor two adjacent switchgear compartments simultaneously.

Internal partition

between switchgearcompartments

Optical detectorprotruding through

compartment dividerinto adjacent

switchgear chamber

Optical detectorwindow facing away

from compartmentdivider


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1S30


Flush mount reinforcing plate

1.2mm zinc plated mild steel



Flush mountreinforcing

plate


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1S30


SENSOR LOCATIONS


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Cable Box Arc Fault

Lower portion of Cover

strengthened


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Cable Box Arc Fault

Sensor location


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CB Chamber Arc Fault

CB chamber fault at 13.1kA (50mS)

Fault initiated by connecting 3 phases of circuit side

of CB with fuse wire

- typical of test leads used during maintenance.

One ARC sensor fitted.


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CB Chamber Arc Fault

General views after test

1S20


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1S20

Does it Work

WILL IT OPERATE UNDER DYNAMIC CONDITIONS? --- YES

HOW FAST DOES IT REMOVE AN INTERNAL FAULT? --- 50-75ms

IS IT EFFECTIVE IN ALL SWITCHGEAR CHAMBERS? --- YES

HOW MUCH DAMAGE IS CAUSED TO THE SWITCHGEAR? --- Minimal

DOES IT IMPROVE SAFETY? --- YES, Significantly

1S30


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1S30

Arc Sensor

measured current

( increase 1*In ==> 10*In)

arc detection

overcurrent detection

trip output contact


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One, two or three independent arc sensor inputs

Two high speed tripping duty arc sense output contacts


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Front Panel Indication

Solid red for 2s followed by:

Alternate red & green until reset.

Green solid

Orange solid

Alternate orange & red.

System healthy

1S30 Arc Sensor service

1S30 Arc Sensor continuous pick up

Flash green 3 times1S30 Power up test OK

Arc fault trip


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Front Panel

FRONT VIEW

Type: 1S20K1 [C] Vx: 48V DCSerial No: 126578


RESET / TEST

System FunctioningArc Fault Trip

System ServiceDC Fail

GREEN:RED:

ORANGE:DARK:

52mm

SERIAL NO. & RATINGLABEL IN THIS POSITIONON REAR TERMINAL BLOCKFOR 1S20 [x][A][x] PANELMOUNT VERSION

REMOVE FORREAR CABLEENTRY OPTION

REAR VIEW

REMOVE FOR

TWO M4 OR 4BAMOUNTING SCREWS

32mm

TOP & BOTTOM REARTERMINAL BLOCKRETAINING SCREWS

31 1mmID

+

(7

5)

113mm

85mm

(30) (30)

(75)

PANEL CUT OUT DETAIL(Minimum clearance to other devices)mm

1S20K2(CAB)

AUX:36-150V

DC

S/N:123456

S f


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Panel or Surface Mounting

P l S f M ti


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Panel or Surface Mounting

86mm 25mm

Use double sided tape suppliedTop & bottom positions24mm

SIDE VIEW

RELAY PANEL3mm THICKMAXIMIUM

FRONT PANELLABEL

(Supplied with module)

SLIDE OUT CABLEENTRY POINTS3 ON ONE SIDE1 AT EACH END

TOP & BOTTOM REARTERMINAL BLOCK

RETAINING SCREWS

THESE MAY BEUNSCREWED &

REVERSED TO FITFROM THE FRONT OFTHE 1S20 MODULE TO

ALLOW SURFACEMOUNTING

RETENTIONSHROUD


RESET / TEST

System Functioning

Arc Fault TripSensor 1 ServiceSensor 2 or 3 ServiceContinuous Sensor P/UDC Supply Fail

GREEN:

RED:ORANGE SOLID:ORANGE FLASH:ORANGE / RED:

NONE:

S/N:123457

DIN R il S f M ti


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DIN Rail or Surface Mounting

5mm

82mm24mm

SIDE VIEW

OPTIONALDIN RAIL CLIP

P/N H01180001B- DIN rail

mount version

DIN RAILRELEASE LEVER

SLIDE OUT CABLEENTRY POINTS3 ON ONE SIDE1 AT EACH END

S/N:123456

1S20K1 (CBB)ARC FAULT MON ITOR

DC FailArc Fa ult TripSystem FunctioningSensor 1 ServiceSensor 2 or 3 ServiceContinuous Sensor P/U

AUX:36- 150V DC

RESET / TEST

NONE:RED:

GREEN:ORANGE SOLID:ORANGE FLASH:ORANGE / RED:

1S20


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Switch 1: Optional arc sensor 2 ON or OFF

Switch 2: Arc fault trip indication LED reset

Switch 3: Independent arc trip ON or OFF

Switch 4: Arc fault trip output contact latch function;

ON for LATCHING, OFF for self reset.

Switch 5: Optional arc sensor 3 ON or OFF

Configuration Settings

ONONON

ONON

OFFOFFOFF

OFFOFF

1: ARC SENSOR 22: LATCHING TRIP LED3: INDEPENDENT ARC TRIP

4: LATCHING TRIP CONTACTS5: ARC SENSOR 3

1S20


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Wiring Termination

1S20 SOCKET TERMINAL LAYOUTViewed the from front when un-plugged from the main housing

(Always wire Arc Sensor 1. Arc sensor 2 & 3 optional)

22

11

33

44

55

66

88

99

1212

1111

1010

1S20


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Wiring Application

1S20 application diagram - Circuits shown in de-energised condition

12

8

10

9

9 or 11

5

1

3

11

6

2

4

Vx

+

+

Fail

alarm

Arc 1

Arc 3 Arc 2

Arc fault trip alarm signal toprotection relay status input for comms.

I>start

Control

Protection

1S20

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Overcurrentrelay

Arc faultrelay

I>

CB Aux Switch Trip Coil

52

T

52 - a

1S20 Ordering Code


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1S20 Ordering Code

Generate the required ordering code as follows: e.g. 1S20-CAB

1 AUXILIARY SUPPLY RANGE

A 20 - 60V DC

C 36 - 150V DC

2 MOUNTING

A Panel mount or surface mount

B DIN rail or surface mount only

3 SENSORS

A Two arc sensor inputs (Default)

B Three arc sensor inputs

PS5R POWER SUPPLY MODULEUse the PS5R-A24 DIN rail mount module to power a single 1from an 85-164V AC auxiliary source.

1 2 3

1S20 Arc Fault Monitor Relay

1S30 Ordering Code


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1S30 Ordering Code

Generate the required ordering code as follows: e.g. 1S30 AA

1 DETECTORS

A Single through hole panel detector

B Dual detectors

2 FLUSH MOUNT REINFORCING PLATE

A Not required

B Required

1 2

1S30 Arc Fault Sensor

1S28 Arc Fault Scheme


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1S28 Arc Fault Scheme

1S20


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Additional Information

Technical Bulletin

User Guide

Price & Availability

www.rmspl.com.au/1s20.htm

Test Manuals

www.rmspl.com.au/search.asp

Other Products

www.rmspl.com.au/products.htm

Date post:	03-Jun-2018
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1s20 Application

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