kcgg-kceg-kceusalesen

Types KCGG 122, 142,KCEG 112, 142, 152, 242 and

KCEU 142, 242Overcurrent Protection

T&DProtection & Control

2

Types KCGG 122, 142, KCEG 112, 142, 152, 242and KCEU 142, 242 Overcurrent Protection

Features• Compact multi-function numerical

relay

• Versions with integraldirectionality (KCEG and KCEU)

• Versions with wattmetricprotection (KCEU)

• Serial communications

• Comprehensive protectionfunctions including:

3 stage overcurrent3 stage earth faultrestricted earth faultup to 9 IDMT curves includingIEC, ANSI/IEEEthermal overload alarm andtripunderfrequencyundercurrentbreaker failureundervoltagerectifier protectionbroken conductor detection

• Two setting groups

• Extensive measurement facilities

• Fault records for the last five faults

• Integral disturbance recorderaccessible from a remote PC

• Integral event recorder accessiblefrom a remote PC

• Circuit breaker maintenancealarm

• Phase segregated outputs

IntroductionThe K Range of overcurrent relaysprovides comprehensive protectionfor phase and earth faults, togetherwith measurements,communications, control andrecording facilities.

Within the range, the KCGG relaysprovide non-directional overcurrentand earth fault protection, while theKCEG and KCEU relays allow eachstage of protection to be selectivelydirectionalised.

The relays in the range aredesigned to operate with a widerange of ac or dc auxiliary powersupplies. If a secure supply is notavailable, the KCEG 242 andKCEU 242 models can be poweredfrom either an auxiliary supply (acor dc) or from the CT circuit. Thus inthe event of auxiliary supply failure,tripping functions will remainoperational.

Figure 1: Relay type KCEG

3

Features per model KCGG KCGG KCEG KCEG KCEG KCEG KCEU KCEU122 142 112 142 152 242 142 242

Selective directional phase elements

Selective directional earth elements

Sensitive earth fault with wattmetric element

Rectifier protection curve

Thermal protection

Broken conductor detection

Dedicated breaker fail protection

Undervoltage

Under frequency

IEC/IEEE/ANSI curves 1 1

Phased output contacts

Cold load pick up

CB maintenance

Remote CB control

Disturbance recorder

Event recorder - last 50 records

Fault recorder - last 5 full records

Load shedding by level

Single phase watts and vars

Thermal ammeter

Peak thermal demand

Table 1: Relay models available Note 1: IEC curves only

KCEG 152Three phase overcurrent anddirectional earth fault relay (externalVo connection)

KCEG 242Self powered three phasedirectional overcurrent anddirectional earth fault relay

KCEU 142Directional three phase overcurrentand directional sensitive earth faultwith wattmetric element

KCEU 242Self powered three phasedirectional overcurrent anddirectional sensitive earth fault withwattmetric element

Models AvailableKCGG 122Single phase overcurrent and/orearth fault relay

KCGG 142Three phase overcurrent and earthfault relay

KCGG 142 02KCGG 142 relay with a reducednumber of inputs and outputs.With 3 opto inputs and 4 outputcontacts, this relay is suppliedpreconfigured or with customerspecified settings

KCEG 112Directional earth fault relay

KCEG 142Three phase directional overcurrentand directional earth fault relay

4

ApplicationThe KCGG, KCEG and KCEUovercurrent relays can be used in allapplications where overcurrentprotection is required, eg. radialand ring circuits, and single andparallel feeders. Furthermore, theintegral starting elements can beused to provide non-cascadeoperation and busbar protection,with additional directional zonefeeder protection available in KCEGand KCEU relays.

Thermal and restricted earth faultprotection is also provided for linesand transformers. KCGG and KCEGrelays, when used with the rectifierIDMT curve, can provide fullprotection of silicon rectifiers.

KCEU relays can be used to providedirectional overcurrent and sensitiveearth fault protection for insulatedpower systems or systems that areearthed through an arc-suppressioncoil. (For arc suppression earthedsystems (Petersen Coil) seepublication R6537.)

Undervoltage and underfrequencyprotection will operate for changesin system conditions or can be usedto provide other protection andcontrol functions.

Functions

Phase fault protection

Figure 2 shows the characteristics ofthe three phase overcurrent elements(I>, I>> and I>>>), their respectivetime delays (t>, t>> and t>>>), theundercurrent element (I<), and thethermal overload element with itsrespective time constant setting (TC).

For KCGG and KCEG relays thefirst phase element (I>/t>) in therelay has a choice of nine inverseand one definite time characteristicas shown in Figure 17.

For KCEU relays, the first phaseelement has a choice of five curves(as per KCGG and KCEG lessrectifier and ANSI/IEEE curves) andone definite time characteristic.

The first element has a reset timer toassist faster clearance of intermittentrecurrent faults. There are two otherelements [(I>>/t>>) and (I>>>/t>>>)] for each phase function,which can be selectively disabled ifnot required.

Thermal overload protection

The thermal overload element is atrue I2 characteristic, withadjustable alarm and tripthresholds. The thermal state isstored in non-volatile memory.

Earth fault protection

The earth fault elements aredesignated (Io>/to>), (Io>>/to>>)and (Io>>>/to>>>), and theirrespective time delays are (to>,to>>, to>>>).

The choice of characteristic curvesfor the first earth fault element is asdescribed above for the phase faultprotection.

In addition to the above earth faultelement the KCEU incorporates anadditional wattmetric characteristic.Setting the wattmetric powerthreshold (Po) to zero disables thischaracteristic and the elementreverts to the standard directionalcharacteristic as described below.When set, the wattmetric powercharacteristic affects the directionalcontrol signal of all earth elements,Io>, Io>>, Io>>>, Io start.

Figure 2:Overcurrent characteristic

Directional elements(KCEG and KCEU)

Directional phase overcurrentelements are polarised by thequadrature phase-phase voltage.The phase directional elements arealso provided with synchronouspolarization which is maintainedafter the voltage collapses so thatdecisive operation is ensured.

For KCEG 142/242 and KCEUrelays, the polarizing voltage(–3Vo) is internally derived from thethree phase voltages applied to therelay. In the case of theKCEG 112/152, the polarizingvoltage must be externally derivedfrom an open delta winding on theline voltage transformers or via avoltage transformer in the earthpath. The earth fault elements areprovided with the same range oftime and current settings.

Undercurrent elements andthree phase loss of load

Two undercurrent elements areprovided, one for phase faults (I<)and one for earth fault (Io<).

The phase fault undercurrentelement can be used for loss of loaddetection.

Multiple IDMT curves or definite time operationfor phase and earth fault low sets.

Two independent high set stages with definitetime operation for both phase and earth faultelements.

Undercurrent element for breaker fail and theauto-resetting of flags.

I>

I>>t>>

I>>> t>>>I<

t>

Ith

TC

Current

Time

5

Circuit breaker failure andback-trip

This protection feature allows therelay to trip the upstream circuitbreaker when a local breakerfailure condition is detected and canbe energised either from operationof the relay or an external trip.Figure 3 shows a typical back-tripmethod for a fault on Feeder 1 thatshould be cleared by Relay 2 andcircuit breaker B (CB–B). If CB-B failsto clear the fault, it will be clearedby the back-trip contact of Relay 2tripping CB–A.

Undervoltage protection(KCEG and KCEU)

A separate characteristic can be setto provide an output forundervoltages which are phase-phase, phase-neutral (KCEG only),three phase or single phase.

An independently set timer, tV< isused with this function which canallow a voltage controlledovercurrent feature to be created byswitching between different currentsettings in the two groups. Theundervoltage element can beblocked when the circuit breaker isopen.

Underfrequency(KCGG and KCEG)

A delayed underfrequency elementis available which can be used toinitiate direct load shed tripping.

Busbar protection

Protection of busbars can also beachieved by using the start andblocking contacts of the K relays.

If in Figure 3, relay 1 has astandard IDMT characteristic for I>,but a fast acting I>> element (timedelay of typically 50ms) which isblocked by the downstream relaysfor feeder faults, an economicalform of busbar protection can beapplied to a system. This can beused where dedicated busbarprotection can not be justified.

Rectifier protection(KCGG and KCEG)

A special inverse time curveprovides protection for siliconrectifiers. Where used with thethermal overload, instantaneousshort circuit and restricted earth faultprotection, both the transformer andrectifier can be fully protected.

Figure 3:Back trip fault clearance

Feeder 1 Feeder 3Feeder 2

Relay 1

Relay 2 Relay 3 Relay 4

CB-A

CB-B CB-C CB-D

Back trip

Incomer

Broken conductor detection

The relay can provide a brokenconductor alarm when it detectsload current in only two out of threeconductors.

Circuit breaker maintenancedata

An alarm is provided to indicate theneed for circuit breakermaintenance based upon thenumber of circuit breaker operationsor upon the summated contactbreaking duty.

The circuit breaker trip time is storedin the fault records.

6

ConfigurationLogic

The configuration of the relay, tomeet the required applications, isaccomplished in software. Settinglogic function links, together with theassignment of inputs and outputs,define the way that the relay willoperate. This allows:

• Selection of features

• Implementation of user definedlogic using auxiliary timers

• Control of the integraldisturbance and event recorder

These may be defined by the uservia the relay front panel functionkeys, or remotely by a PC via thecommunications system.

Alternative setting group

Two setting groups allow the user toassign settings for differentoperating conditions.Several methods of selecting thealternative setting group areprovided.

Ancillary FunctionsMeasurements

The measurement values providedby the relay can be accessed by anintegral back-lit liquid crystal displayor via the serial port eliminating theneed for additional instrumentationto be mounted on the panel.The measurements can be displayedin either primary or secondaryvalues as selected by the user.

The following quantities areprovided as standard:

• phase current

• neutral current

• frequency

• thermal ammeter

• peak demand ammeter

Additional values are provided bythe KCEG and KCEU, as follows:

• phase-neutral voltage(KCEG only)

• line voltage

• residual voltage

• watts (three phase, single phasefor KCEG)

• VArs (three phase, single phasefor KCEG)

• volt amps

• power factor

Fault records

The last five faults are recorded bythe relay. They include:

• fault flags

• currents

• voltages (where measured)

• circuit breaker operation time

Event records

Fifty events are stored in a buffer.Software is available to enable theevents to be downloaded to a PC.

An event record is logged followinga change of state of a control inputor output relay, local setting change,or operation of a control function.Records are time tagged to aresolution of 1ms. Fault records andalarms are also stored as events.

Disturbance records

The internal disturbance recorderhas up to 7 analogue, 16 digitaland 1 time channel (depending onthe model selected). The recordercan be triggered from any relayoutput and/or digital input, and canstore one complete record. Data issampled 8 times per cycle and eachchannel can store up to 512samples. Software is available toallow records to be accessed anddisplayed by a PC.

Test Features

A number of features are providedto enable the relay to be thoroughlytested during commissioning, routinemaintenance and fault findingoperations:

• Power-on diagnostics

• Continuous self monitoring

• The verification of input quantitiesby the measurement functions

• The on/off states of the digitalinputs and relay outputs can bedisplayed

7

Hardware DescriptionKCGG, KCEG and KCEU relays arehoused in Midos modular cases,suitable for either rack or panelmounting as shown in Figures 18,19 and 20.

The relays can have up to 4 CT andup to 3 VT analogue inputs.They provide 3 or 8 opticallyisolated inputs and 4 or 8programmable outputs dependingon the model selected, together witha dedicated watchdog relay.

The front panel contains a 2 x 16character alphanumeric back-litliquid crystal display (LCD).The back-light is activated when thekeypad is touched and willautomatically switch off, conservingpower, after 15 minutes of keypadinactivity. Four push-buttons providelocal access to the relay’s menu.There are also 3 light emittingdiodes (LED) for visual indication ofthe relay’s status, ie. relay healthy,trip, alarm.

Standard Midos terminal blocks arelocated at the rear of the relayproviding connections for all inputand output circuits. Each terminalwill accept up to two insulatedcrimp terminals using either; an ‘L’shaped ring connector fastened witha 4mm diameter (M4) screw or; asnap-on connector compliant withBS5057 or equivalent.

User InterfaceFront panel user interface

The features of the relay can beaccessed through a menu drivensystem. The menu is arranged in theform of a table, into each column ofwhich, related items (menu cells) aregrouped.

The front panel LCD displays onemenu cell at a time. The completemenu system can be traversed withthe relay’s front cover in place byusing the ‘F’ key. Easier access canbe made with the cover off by usingthe ‘+’ and ‘–’ keys, which are alsoused to change the relay settings.

Remote access user interface

The menu table can also beaccessed via the remotecommunications facility. This allowsall of the menu cells in a column tobe displayed simultaneously on thescreen of a PC. Changes to a menucell can be made from the PCkeyboard.

Serial communication

The relays are interconnected via ashielded, twisted wire pair knownas K-Bus. Up to 32 relays may beconnected in parallel across the bus.

The K-Bus is connected through aprotocol converter known as KITZ,either directly or via a modem, tothe RS232 port of the PC. The KITZprovides signals over the bus whichare RS485 based and aretransmitted at 64kbits/s. The K-Busconnection is shown in Figure 5.

This system allows up to 32 relays tobe accessed through one RS232communications port. A pictorialrepresentation of this is shown inFigure 4.

Software is available with each KITZto provide access to the relay toread and change settings.Additional software entitled‘Protection Access Software &Toolkit’ is available. This providesaccess to the event recorder andother additional functions.

Each relay is directly addressableover the bus to allow communicationwith any selected relay. Globalcommands may also be given to allrelays on the network.

It should be noted that protectiontripping and blocking signals arenot routed via the K-Bus.Separate conventional cabling isused for this purpose; whereappropriate the isolated 48V dcsupply available on each relay isused to energise the optically-isolated inputs.

Communications protocol

The communications protocol usedwith K Range relays is designatedCourier. The Courier language hasbeen developed specifically for thepurpose of developing generic PCprograms that will, withoutmodification, communicate with anydevice using the Courier language.

In the Courier system, allinformation resides within the relay.Each time communication isestablished with the relay, therequested information is loaded tothe PC. The protocol includesextensive error checking routines toensure the system remains reliableand secure.

Password protection

Password protection is provided onsettings which alter the configurationof the relay, any accidental changeto which could seriously affect theability of the relay to perform itsintended function, ie. enable/disable settings, protection functioncharacteristic selection, schemelogic settings and system VT and CTratios.

8

Figure 4:Basic communication system

Figure 5:Typical communications terminal arrangement

KITZ

Protocolconverter

RS232K-Bus

Relay 32 Relay 3 Relay 2 Relay 1

DesktopcomputerPC

Relay 4

K-Bus screened2 core cable

9

Figure 6:Typical application diagram KCGG 122

13

14

21

2223

2425

2627

28

46Change setting group L0

48Block t>>/to>> L1

50Block t>>>/to>>> L2

52(1)Logic input common

LP1P2

S2 S1

N

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54

K–Bus communications port56

7

8+48V field voltage

AC/DCsupply

Vx

KCGG 122

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN

Module terminal blocksviewed from rear

(with integral case earth strap)

Case earth

1

Case earthconnection

Start Io>

Start I>

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)

(to>/to>>/to>>>/aux 1)(t>/t>>/t>>>)

SCN

Notes:(a) CT shorting links make

before (b) and (c) disconnect.(b) Short terminals break before (c).(c) Long terminal(d) Pin terminal (pcb type).

(1)

CT connections are typical only.(2)Earth connections are typical only.(3)

10

Figure 7:Typical application diagram KCGG 142

13

14

21

2223

2425

2627

28

46

48

50

52Logic input common (1)

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

7

8 +48V field voltage

AC/DCsupply

Vx

KCGG 14229

31RL4

33

35RL5

37

39RL6

41

43RL7

45External trip L3

47Initiate auxiliary timer 2 L4

49Initiate auxiliary timer 3 L5

51CB closed indication L6

53CB open indication L7


Notes:

(a) CT shorting links makebefore (b) and (c) disconnect.

(b) Short terminals break before (c).(c) Long terminal

(d) Pin terminal (pcb type).

(1)


C

A

BPhase rotation

1


54


35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

Change setting group L0

Block t>>/to>> L1

Block t>>>/to>>> L2

Start Io>

Start I>

thAlarm/CB alarm/CB fail

CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)

(to>/to>>/to>>>/aux 1)(t>/t>>/t>>>)

11

Figu

re 8

:Ty

pica

l app

licat

ion

diag

ram

KC

GG

142

02

13 14 21 22 23 24 25 26 27 28 46 48 50 52Lo

gic

inpu

t com

mon

(1)

AP1

P2

S2S1

B C

4 6W

DRe

lay

heal

thy

3 5W

DRe

lay

faile

d

30 32RL

0

34 36RL

1

38 40RL

2

42 44RL

3

7 8+4

8V fi

eld vo

ltage

AC/D

Csu

pply Vx

KCG

G 1

4202

Not

es: (a)

CT sh

ortin

g lin

ks m

ake

befo

re (b

) and

(c) d

iscon

nect.

(b)

Shor

t ter

mina

ls br

eak b

efor

e (c)

.(c)

Long

term

inal

(d)

Pin te

rmin

al (p

cb ty

pe).

(1)

CT c

onne

ction

s are

typi

cal o

nly.

(2)

Earth

con

necti

ons a

re ty

pica

l only

.(3

)

C

A

BPh

ase

rota

tion

1

Case

ear

thco

nnec

tion

54

K–Bu

s com

muni

catio

ns p

ort

56

3 54 6

1 7 98 10

31 3332 34

29 35 3736 3830

3940

4142

4344

4546

4748

4950

5152

5354

5556

1314

1718

1920

2122

2324

2526

2728

SCN

Mod

ule te

rmin

al b

lock

svie

wed

from

rear

(with

integ

ral c

ase

earth

stra

p)

Case

ear

th

Chan

ge se

tting

grou

p L0

Bloc

k t>>

/to>

> L1

Bloc

k t>>

>/to

>>>

L2

Star

t Io>

Star

t I>

SCN

AR in

itiate

Trip

(to>/

to>>

/to>

>>)

(t>/t

>>/t

>>>)

(to>/

to>>

/to>

>>/a

ux 1

)(t>

/t>>

/t>>

>)

12

Figure 9:Typical application diagram KCEG 112

13

14

21

2223

2425

2627

28

46

48

50


AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage



(1)


AC/DCsupply

Vx

KCEG 112

C

N

BA

dn

da

19

20

Direction of forward current flow

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1



Block to>> L1

Block to>>> L2

Start (Io>FWD)

Start (Io>REV)

SCN

AR initiate

Trip

(to>/to>>/to>>>)

(to>/to>>/to>>>/aux 1)

13


13

14

21

2223

2425

2627

28

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

AC/DCsupply

Vx

KCEG 142

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53




(1)


C

N

BA

n

a


b c

17

18

19

20

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1


Logic input common (1)

External trip L3

Initiate auxiliary timer 2 L4


CB closed indication L6

CB open indication L7


Block t>>/to>> L1

Block t>>>/to>>> L2

Start (Io> FWD/I> FWD)

Start (Io> REV/I> REV)


CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)

(to>/to>>/to>>>/aux 1)(thTrip/t>/t>>/t>>>)

14


K–Bus communications port

13

14

21

2223

2425

2627

28

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54

56

7

8+48V field voltage

AC/DCsupply

Vx

KCEG 152

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53


C

N

BA

dn

da


19

20



(1)


C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1



External trip L3






Block t>>/to>> L1

Block t>>>/to>>> L2

Start (Io>FWD)

Start (Io>REV)


CB fail/backtrip

Control CB close

Control CB trip

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


SCN

15


AC/DC supply Vx


Start (Io>FWD/I>FWD)

Start (Io>REV/I>REV)


CB fail/backtrip

Control CB close

Control CB trip

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


Logic input common


External trip L3





Block t>>/to>> L1

Block t>>>/to>>> L2

13

14

21

2223

2425

2627

28

4648

50

52

AP1P2

S2 S1B

C

4

6WD Relay failed

3

5WD Relay healthy

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

KCEG 242

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53

55(2)

910

Supply to trip coil

SeriesREG

C

N

BA

n

a




(1)


17

18

19

20

b c

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1


SCN

16

Figure 13:Typical application diagram KCEU 142

13

14

21

2223

2425

2627

28

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

AC/DCsupply

Vx

KCEU 142

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53




(1)


C

N

BA

n

a


17

18

19

20

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1



External trip L3






Block t>>/to>> L1

Block t>>>/to>>> L2




CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


P1P2

b c

17

Figure 14:Typical application diagram KCEU 242

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

KCEU 242

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53




(1)


C

N

BA


17

18

19

20

C

A

BPhase rotation

1



External trip L3






Block t>>/to>> L1

Block t>>>/to>>> L2




CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


P1P2AC/DC

supply Vx

13

14

21

2223

2425

2627

28

910

Supply totrip coil

SeriesREG

n

a b c

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

18

Figure 15:Typical application diagram KCEU 142 showing connection for broken delta VT winding

13

14

21

2223

2425

2627

28

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

AC/DCsupply

Vx

KCEU 142

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53




(1)


C

N

BA

dn

da


17

18

19

20

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1



External trip L3






Block t>>/to>> L1

Block t>>>/to>>> L2




CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


P1P2

19

Figure 16:Typical application diagram KCEU 242 showing connection for broken delta VT winding

46

48

50

52

AP1P2

S2 S1B

C

4

6WD Relay healthy

3

5WD Relay failed

30

32RL0

34

36RL1

38

40RL2

42

44RL3

54


7

8+48V field voltage

KCEU 242

29

31RL4

33

35RL5

37

39RL6

41

43RL7

45

47

49

51

53




(1)


C

N

BA


17

18

19

20

C

A

BPhase rotation

35

46

1

79

810

3133

3234

29

3537

3638

30

39 4041 4243 4445 4647 4849 5051 5253 5455 56

13 14

17 1819 2021 22

23 24

25 26

27 28SCN



Case earth

1



External trip L3






Block t>>/to>> L1

Block t>>>/to>>> L2




CB fail/backtrip

Control CB close

Control CB trip

SCN

AR initiate

Trip

(to>/to>>/to>>>)(t>/t>>/t>>>)


P1P2AC/DC

supply Vx

13

14

21

2223

2425

2627

28

910

Supply totrip coil

SeriesREG

dn

da

20

STI 3

0xDT

VI 3

0xDT

EI 10

xDT

SI 30

xDT

LTI 3

0xDT

110

100

Mult

iples

of s

etting

1000

0

1000 100 10 1

0.1

Operating time (seconds)

Recti

fier

curv

e

1000

0

1000 100 10 1

0.1

110

100EIVIM

I

Mult

iples

of s

etting

Operating time (seconds)

IEC a

nd sp

ecia

l app

licat

ion

curv

esAN

SI/IEE

E cu

rves

Ther

mal c

urve

s

1Cu

rrent

(xIth>

)

0.00

1

No

pre-f

ault l

oad

Time (x t)

Pre-f

ault l

oad

at50

% the

rmal

state

23

45

6

0.01

0

0.10

0

1.00

0

10.0

00

Pre-f

ault l

oad

at70

% the

rmal

state

Pre-f

ault l

oad

at90

% the

rmal

state

Figu

re 1

7:ID

MT

and

the

rmal

cur

ves

LTI 3

0xD

TLo

ng ti

me

inve

rse

MI

Mod

erat

ely

inve

rse

SI 3

0xD

T*St

anda

rd in

vers

eVI

Very

inve

rse

EI 1

0xD

T*Ex

trem

ely

inve

rse

EIEx

trem

ely

inve

rse

VI 3

0xD

T*Ve

ry in

vers

eST

I 30x

DT

Shot

tim

e in

vers

e

*IEC

sta

ndar

d ch

arac

teris

ticA

ll ch

arac

teris

tics

are

defin

ite ti

me

abov

e 30

x ex

cept

extre

mel

y in

vers

e an

d re

ctifi

er c

urve

.

21

Technical Data

Ratings

Inputs:

• AC current (In)

1A or 5A

• AC voltage (Vn)

110V or 440V nominal phase-phase (KCEG)

110V nominal phase-phase(KCEU)

• Frequency

50/60Hz (50Hz for KCEU)

• Auxiliary voltage (Vx)

KCGG 122,142, KCEG112,142,152 and KCEU 142

Nominal (V) Operative range (V)

dc dc ac

24 – 125V 19 – 150 50 – 133or

48 – 250 33 – 300 87 – 265

KCEG 242 and KCEU 242 only

Nominal (V) Operative range (V)

dc dc ac

100 – 250 60 – 300 60 – 265

Outputs:

• Field voltage supply(for optically-isolated digitalinputs)

48V dc (current limit: 60mA)

• Capacitor discharge trip

50V dc, 680µF

Burdens

• AC current0.02VA at In = 1A0.03VA at In = 5A

• AC voltage0.02VA at 110V phase-phase

• DC auxiliary voltage4W to 12W*

• AC auxiliary voltage6VA to 23VA*

• Optically-isolated inputs0.25W per input

*Note: Depending on the numberof inputs and outputs energised.

Thermal withstand

• AC current inputs3.2In continuous30In for 3s100In for 1s (maximum 400A)

• AC voltage inputs2 x Vn continuously2.6Vn for 10swhere Vn = 110V phase-phase

Accuracy

• Operating timest>/to>IDTM except EI and rectifier

±5% plus 20 to 40msEI and rectifier

±7.5% plus 20 to 40msDefinite time

±0.5% plus 20 to 40mst>>/to>>/t>>>/to>>>

Typically ±0.5% plus 20to 40ms

• Reset timet>/to> Typically ±1% ±50ms

• MeasurementsVoltage Typically ±2% VnCurrent Typically ±2% InPower Typically ±4% PnFrequency Typically ±0.02Hz

Transformer turns ratios

• Current transformers

1:1 to 9999:1• Voltage transformers

1:1 to 9999:1

Current transformerrequirements

The following CT requirementsshown in Table 1 are based on amaximum prospective fault currentof 50In and the relay having amaximum high-set setting of 25In.The CT requirements are designedto provide operation of the phaseand earth fault elements. When thecriteria for a specific application arein excess of those detailed above orthe actual resistance exceeds thelimiting value quoted, the CTrequirements may need to beincreased. CT requirements for avariety of further applications areprovided in publication R6096.Where the relays are being used forrestricted earth fault protection theCTs must be of the correct size toassure stability as described inpublication R6142.

Table 1: Current transformer requirements

KCGG 122,142 and KCEG 112,142,152 and KCEU 142

Relay and Nominal Accuracy Accuracy limit Limiting leadCT secondary output class factor x rated resistance

rating (A) (VA) current one way Ω

1 2.5 10P 20 0.6

5 7.5 10P 20 0.06

KCEG 242 and KCEU 242

1 7.5 10P 15 0.7

5 10 10P 20 0.06

22

Core balance currenttransformer requirements forearth faults

Core balance CTs of metering classaccuracy are required and shouldhave a knee-point voltage satisfyingthe following formulae. (The value ofcurrent used for Ifn should be themaximum possible earth faultcurrent that may flow). In addition, itshould be ensured that the phaseerror of the applied CT is less than90’ at 10% of rated current and lessthan 150’ at 1% of rated current.

For the IDMT characteristic of thefirst element Io>:

Vk > (Icn/2).(Rct + 2RL + Rrp + Rrn)

Io> element

Vk > (Ifn/2).(Rct + 2RL + Rrp + Rrn)

Io>>/Io>>> element

where:

Vk = Required CT knee-pointvoltage

Icn = Maximum prospectivesecondary current for earthfaults or 31 times Io> setting(whichever is lower)

Ifn = Maximum prospectivesecondary current for earthfaults

Rct = CT secondary windingresistance

RL = Resistance of single leadfrom relay to currenttransformer

Rrp = Impedance of relay phasecurrent input

Rrn = Impedance of relay neutralcurrent input

Overcurrent settings

Phase fault

Threshold (Is)

KCGG 122,142 KCEG 242KCEG 112,142,152 KCEU 242

KCEU 142

I> 0.08 – 3.2In 0.4 – 2.4In

I>> 0.08 – 32In 0.4 – 32In

I>>> 0.08 – 32In 0.4 – 32In

I< 0.02 – 3.2In 0.02 – 3.2In

Earth fault

Standard Special Sensitive∆(on request)

KCGG 122, 142 KCEG 112, 152,KCEG 112, 142, 152, 242 KCEU 142, 242

Io> 0.005 – 0.8In 0.02 – 3.2In* 0.001 – 0.16In*

Io>> 0.005 – 8.0In 0.02 – 32In* 0.001 – 1.6In*

Io>>> 0.005 – 8.0In 0.02 – 32In* 0.001 – 1.6In*

Io< 0.005 – 0.8In 0.02 – 3.2In 0.0005 – 0.16In*

∆ Note:The sensitive settings are standardfor KCEU 142, 242 and areavailable on request for KCEG 112,152.

*Notes:

1. For operation for earth faultsbelow 0.2In with the KCEG 242andKCEU 242, there must besufficient load current to powerthe relay or alternatively, anauxiliary voltage supply.

2. The special settings may berequired where limitations on theCT ratio result in a need for anunusually high earth fault setting.Otherwise the standard settingrange should be chosen.

Thermal alarm 0 – 110% ofthermal state

Ith> 0.08 – 3.2In

tc 1 to 120 minutes

Directional settings (KCEG andKCEU)

• Characteristic angle

–180º to +180º in 1º steps

• Zone of operation

Characteristic angle±90º (standard)±85° (wattmetric)

• Voltage polarising threshold(overcurrent directional elements)

110Vn: 0.6V fixed

KCEG only440Vn: 2.4V fixed

• Voltage polarising threshold Vop>(earth fault directional elements)

110Vn: 0.6V to 80V in0.2V steps

KCEG only440Vn: 2.4V to 320V in

0.8V steps

• Wattmetric power threshold Po>

In = 1A: 0 to 20W in50mW steps

KCEU onlyIn = 5A: 0 to 100W in

250mW steps

23

• Undervoltage trip threshold V<

110Vn: 1.0V to 220V in1.0V steps

KCEG only440Vn: 4.0V to 880V

in 4.0V steps

• Undervoltage V<

Vn = 110V: 0 to 220V

KCEG onlyVn = 440V: 0 to 880V

• Underfrequency(KCGG and KCEG only)

F< 46 to 64Hz in0.01Hz steps

Reset F< +0.05Hz

Time settings (in graded steps)

to>/t>(definite time) 0 to 100stRESET 0 to 60sto>>/t>> 0 to 100sto>>>/t>>> 0 to 10stV< 0 to 10stAUX 1 0 to 2 x 106s

(24 days)tAUX 2 0 to 2 x 106s

(24 days)tAUX 3 0 to 2 x 106s

(24 days)tBF 0 to 10stTRIP/tCLOSE 0.5s to 5sIDMT curves See Figure 17.

Digital inputs

• Optically-isolated inputs

3 (KCGG 122/KCEG 112)8 (All other models)

• Minimum operating voltage>35V dc

• Maximum operating voltage

50V dc

• Maximum ac induced loopvoltage

50V rms (thermal limit)

• Input resistance

10kΩ

Contacts

• Output relays

4 (KCGG 122/KCEG 112)

8 (All other models)

• Contact rating

Make: 30A and carry for 0.2s

Carry: 5A continuous

Break: dc 50W resistive25W inductive(L/R = 0.04s)

ac 1250VA

Subject to maxima of 5Aand 300V.

• Watchdog relays

1 make and 1 break

Make: 10A and carry for 0.2s

Carry: 5A continuous

Break: dc 30W resistive15W inductive(L/R = 0.04s)

ac 1250VA

Subject to maxima of 5Aand 300V.

• Durability

Loaded contact

10,000 operations minimum

Unloaded contact

100,000 operation minimum

• Communications port (K-Bus)

• Transmission mode

Synchronous

• Signal levels

RS485

• Message format

HDLC

• Data rate

64 kbits/s

• Connection

Multidrop (32 units)

• Cable type

Screened twisted pair

• Cable length

1000m

• Connector

Screw terminals or push-onconnector to BS5057

• Isolation

2kV rms for 1 minute

High voltage withstand

• Dielectric withstand

IEC 60255-5: 1977

2kV rms for 1 minute between allcase terminals (except terminal 1)connected together and the caseearth/terminal 1.

2kV rms for 1 minute betweenterminals of independent circuitsincluding contact circuits.

1kV rms for 1 minute across theopen contacts of the watchdogrelays.

ANSI/IEEE C37.90: 19891.5kV rms for 1 minute acrossopen contacts of output relays.

• High voltage impulse

IEC 60255-5: 1977

Three positive and three negativeimpulses of 5kV peak, 1.2/50µs,0.5J between all terminals of thesame circuit (except outputcontacts), between independentcircuits and between all terminalsconnected together (exceptterminal 1) and case earthterminal 1.

Electrical environment

• DC supply interruption

IEC 60255-11: 1979

10ms interruption in the auxiliarysupply, under normal operatingconditions, without de-energising.

• AC ripple on dc supply

IEC 60255-11: 1979

The unit will withstand 12% acripple on the dc supply.

• High frequency disturbance

IEC 60255-22-1: 1988 Class III

2.5kV peak between independentcircuits and case earth.

1.0kV peak across terminals ofthe same circuit (except metalliccontacts).

• Fast transient disturbance

IEC 60255-22-4: 1992 Class IV

4kV, 2.5kHz applied directly toall inputs.

4kV, 2.5kHz applied directly toauxiliary voltage, watchdog andtrip capacitor.

4kV, 2.5kHz via capacitor clampto all inputs.

24

• Electrostatic discharge

IEC 60255-22-2: 1996 Class 3

8kV discharge in air with cover inplace.

IEC 60255-22-2: 1996 Class 2

4kV contact discharge with coverremoved.

• EMC compliance

89/336/EEC

Compliance to the EuropeanCommission Directive on EMC isclaimed via the TechnicalConstruction File route.

EN 50081-2: 1994EN 50082-2: 1995

Generic Standards were used toestablish conformity.

• Product safety

73/23/EEC

Compliance with EuropeanCommission Low VoltageDirective.

EN 61010-1: 1993/A2: 1995EN 60950: 1992/A11: 1997

Compliance is demonstrated byreference to generic safetystandards.

Atmospheric environment

• Temperature

IEC 60068-2-1: 1990/A2: 1994

(cold) Storage and transit–25°C to +70°C

IEC 60068-2-2: 1974/A2: 1994

(dry heat) Operating–25°C to +55°C

• Humidity

IEC 60068-2-3: 1969

56 days at 93% RH and +40°C

• Enclosure protection

IEC 60529: 1989

IP50 (dust protected)

Mechanical environment

• Vibration

IEC 60255-21-1: 1988

Response Class 1

Endurance Class 1

• Shock and bump

IEC 60255-21-2: 1988

Shock response Class 1

Shock withstand Class 1

Bump Class 1

• Seismic

IEC 60255-21-3: 1993 Class 2

• Surge withstand capability(SWC)

C37.90.1: 1989

4kV fast transient applied directlyto each input and earth.

2.5kV oscillatory applied directlyto each input and earth.

4kV fast transient applied directlyacross each output contact, optoinput and power supply circuit.

2.5kV oscillatory applied directlyacross each output contact, optoinput and power supply circuit.

IEEE radiated immunity

C37.90.2: 1995

25 – 1000MHz, zero and 100%square wave modulated.

Field strength 35V/m.

25

Figure 18: Case outlines size 4

97

177

32 21225 min.

157 max.

11103

99

52

23.54 holes Ø 4.4

168 159

Panel cut-out:Flush mounting fixing details.

All dimensions in mm.

Flush mounting.

CasesKCGG 122KCGG 142 Midos size 4KCEG 112

KCEG 142KCEG 152 Midos size 6KCEU 142

KCEG 242 Midos size 8KCEU 242

Case outlines are shown in Figures18, 19 and 20.


149

177

32 21225 min.

157 max.

155

151

103.6

23.54 holes Ø 4.4

168 159



Flush mounting. 11

26


200

177

32 21225 min.

157 max.

11206

203

155.4

244 holes Ø 4.4

168 159



Flush mounting.

Additional informationService Manual R8551CT Requirements for theApplication of Midos Relays R6096

K Range Relay Schemes R6536KITZ 101/102/103 R6521

KITZ 201 R6542KITZ 204 R6563

Application Notes for KCGG High Impedance Protection R6142Supplementary Application Guide forSensitive Earth Fault Protection R6554

27

Information required with order

* Note: See ‘Overcurrent settings’, page 22.It will be assumed that the standard version will be required unlessotherwise stated in the order.

Relay type: K C G G D 0

122 1 2 2142 1 4 2

Configuration:Standard 0 1Customer settings X X

KCGG 142 only:Reduced input/output 0 2Reduced I/O with customer settings X Y

Case size:Size 4 MIDOS Flush Mounting D

Auxiliary voltage:24/125V 248/250V 5

Not used

CT rating:1A CT (0.005In to 0.8In for earth faults) standard C1A CT (0.02In to 3.2In for earth faults) special D5A CT (0.005In to 0.8In for earth faults) standard E5A CT (0.02In to 3.2In for earth faults) special F

Language:English EFrench FGerman GSpanish S

Issue letter

28

Relay type: K C E G D 0

112 1 1 2142 1 4 2152 1 5 2242 2 4 2


Case size:Size 4 MIDOS Flush Mounting(KCEG 112 only) DSize 6 MIDOS Flush Mounting(KCEG 142/152 only) FSize 8 MIDOS Flush Mounting(KCEG 242 only) H

Auxiliary voltage (Vx):24/125V (except KCEG 242) 248/250V (except KCEG 242) 5100/250V (KCEG 242 only) 9

Operating voltage (Vn):110V ac; 50 – 60Hz 1440V ac; 50 – 60Hz 4

CT rating:1A CT (0.005In to 0.8In for earth faults) standard C1A CT (0.02In to 3.2In for earth faults) special D5A CT (0.005In to 0.8In for earth faults) standard E5A CT (0.02In to 3.2In for earth faults) special F1A CT (0.001In to 0.16In for earth faults) sensitive1 L5A CT (0.001In to 0.16In for earth faults) sensitive1 M5A CT phase; 1A CT earth (0.001In to 0.16In forearth faults) sensitive2 P


Issue letter

1 KCEG 112 and KCEG 152 only2 KCEG 152 only

* Notes: See ‘Overcurrent settings’, page 22.It will be assumed that the standard version will be required unlessotherwise stated in the order.

29

Relay type: K C E U 4 2 D 0

Auxiliary powered 1Dual powered 2


Case size:Size 6 MIDOS Flush Mounting(KCEU 142 only) FSize 8 MIDOS Flush Mounting(KCEU 242 only) H

Auxiliary voltage :24/125V (except KCEU 242) 248/250V (except KCEU 242) 5100/250V (KCEU 242 only) 9

Operating voltage (Vn):110V ac; 50Hz 1

CT rating:1A CT L5A CT M5A CT for phase; 1A CT for earth (KCEU 142 only) P


Issue letter

30

GlossaryCourier A communications language developed to provide generic

control, monitoring, data extraction and setting changes onremote devices (primarily on protective relays) within thesubstation environment.

K-Bus The 64 kbit/s twisted pair cable used to connect Couriercompatible devices and transfer Courier data.

KITZ The interface unit which converts between K-Bus andIEC870 format data.

PC Personal computer

31

ALSTOM T&D Protection & Control Business contact addresses

Caribbean, Central and South America

Brazil

South America

Western Europeand Africa

United Kingdom and Northern Europe

France, Belgium and Luxembourg

Italy

Spain and Portugal

Mediterranean and Africa

Germanyand Eastern Europe

Germany and SwitzerlandRussian Speaking Countries

South East Europe

Central Europe

Middle East Asiaand Pacific

Middle East Asia

India and South Asia

South East Asia

China and North East Asia

Australia and Pacific IslandsPCB Head Office

North and South America

USA and Panama

Canada

Mexico

ALSTOM T&D P&C3 Parc des Grillons60 Route de SartrouvilleB.P. 58. 78230 Le Pecq CedexFRANCETel: +33 (0)1 34 80 79 00Fax: +33 (0)1 34 80 79 [email protected]

ALSTOM T&D P&C LtdSt Leonards WorksStafford. ST17 4LXUNITED KINGDOMTel: +44 (0)1785 223251Fax: +44 (0)1785 [email protected]

ALSTOM T&D P&C SAAvenue de Figuières34975 Lattes CedexFRANCETel: +33 (0)4 67 20 54 54Fax: +33 (0)4 67 20 54 [email protected]

ALSTOM FIR S.p.AViale Giulio Cesare, 2924124 -BergamoITALYTel: +39 035 5791611Fax: +39 035 [email protected]

ALSTOM T&D, S.APaseo de la Castellana, 25728046 MadridSPAINTel: +34 91 334 59 43Fax: +34 91 334 59 [email protected]

ALSTOM T&D P&C SAAvenue de Figuières34975 Lattes CedexFRANCETel: +33 (0)4 67 20 54 54Fax: +33 (0)4 67 20 54 [email protected]

ALSTOM ENERGIETECHNIK GmbHBereich Schutz- undSchaltanlagenleittechnikLyoner Straße 44-48D 60528 Frankfurt/MainGERMANYTel: +49 69 66 32 33 33Fax: +49 69 66 32 25 [email protected]

ALSTOM AUSTRIA AGHietzinger Kai 169A1130-ViennaAUSTRIATel: +43 1 87893 726Fax: +43 1 87893 [email protected]

ALSTOM T&D P&C SAuI. Strzegomska 23/2758-160 SwiebodzicePOLANDTel: +48 748 54 84 10Fax: +48 748 54 85 [email protected]

ALSTOM T&D P&C Ltd12th Floor, Crescent TowerBuhaira CornichePO Box 25448, SharjahUNITED ARAB EMIRATESTel: +971 6 556 3971Fax: +971 6 556 [email protected]

ALSTOM INDIA LtdProtection & Control Division19/1 GST Road, Pallavaram WorksChennai (Madras) 600 043INDIATel: +91 44 236 8621Fax: +91 44 236 [email protected]

ALSTOM T&D P&C Ltd31 Kaki Bukit Road 3#07-03, TechlinkSingapore 417818SINGAPORETel: +65 843 3130Fax: +65 846 [email protected]

ALSTOM T&D P&CRoom 910-912, 9th FloorNew Kowloon Plaza38 Tai Kok Tsui RoadKowloon, Hong KongCHINATel: +852 2833 6265Fax: +852 2834 [email protected]

ALSTOM AUSTRALIA LtdProtection & Control DivisionPO Box 22, 25 Princes Road,Regents Park, NSW 2143, SydneyAUSTRALIATel: +61 29 645 0777Fax: +61 29 743 [email protected]

ALSTOM USA INCProtection & Control Division4 Skyline Drive - Station MHawthorneNew York 10532-2160USATel: +1 914 347 5166Fax: +1 914 347 [email protected]

ALSTOM CANADA INC5112 Timberlea BoulevardMississauga, TorontoOntario L4W 2S5CANADATel: +1 800 263 0646Fax: +1 905 624 8855/[email protected]

ALSTOM T&D SA DE CVAlce Blanco 13-ANaucalpan de JuarezCP 53370 Mexico CityMEXICOTel: +52 5 358 27 22Fax: +52 5 358 83 [email protected]

ALSTOM INTERNATIONAL (PERU)Edificio Las NacionesAvenida Central 643 - Piso 1San IsidroLima 27Tel: +51 1 221 7954/1208Fax: +51 1 221 [email protected]

ALSTOM T&D LtdProtecção e ControlAvenida Interlagos 4211CEP-04661-300 São PauloSão PauloBRAZILTel: +55 11 5524 1044Fax: +55 11 5548 [email protected]

ALSTOM ARGENTINA SAProtección y ControlAv. Leandro N. Alem 896 - Piso 51001 Buenos AiresARGENTINATel: +54 11 4891 9600/9666Fax: +54 11 4311 [email protected]

TRANSMISSION & DISTRIBUTION Protection & Control, HQ, 60 Route de Sartrouville, BP58, 78230 Le Pecq Cedex, FranceTel: +33 (0) 134 80 79 00 Fax: +33 (0) 134 80 79 13 Email: [email protected] Internet: www.alstom.com

©2000 ALSTOM. ALSTOM, the ALSTOM logo and any alternative version thereof are trademarks and service marks of ALSTOM.Other names mentioned, registered or not, are the property of their respective companies.

Our policy is one of continuous development. Accordingly the design of our products may change at any time. Whilst every effort is made to produce up to date literature, this brochure shouldonly be regarded as a guide and is intended for information purposes only. Its contents do not constitute an offer for sale or advice on the application of any product referred to in it.

We cannot be held responsible for any reliance on any decisions taken on its contents without specific advice.

Publication R6551F 120030 CPS Printed in England.

kcgg-kceg-kceusalesen

Documents

p2 s2 s1

short terminals

ac 1250va

5a continuous

forward current

control cb

alternative

special 5a