MVAJ

Type MVAJTripping and Control Relays

2

Type MVAJ Tripping and Control Relays

Features• High speed operation

• High and low burden alternatives

• Low burden models suitable forac and dc operation

• Models surge proof against highcapacitance discharge currents inthe dc supply system, areavailable

• Control relays immune to ac canbe supplied

Models AvailableType MVAJ relays may broadly bedivided into three groups:

• High burden tripping relayscomplying with ESI 48-4 ClassEB2

• Low burden tripping relays whichcomply with ESI 48-4 Class EB1

• Control relays which meetthe requirements ofNational Grid CompanySPEC.NGTS 2.19:1996

Table 1 lists the generalcharacteristics and includesinformation on how the relay burdenis modified at, or just afteroperation. ‘Economy’ indicates thatthe burden is reduced to a lowvalue.

Instantaneous cut off is a feature ofsome hand and electrically resetelements and reduces the burden tozero, whilst others incorporate atime delay to enable series elementsto operate. This time delay is 40msto 60ms in all cases except that ofthe types MVAJ 26 and 56 in whichthe delay is 2s. All low burdenrelays are suitable for ac or dcoperation. All high burden relaysare for dc operation only.

ApplicationHigh Burden Tripping Relays TypesMVAJ 21, 23, 24, 25, 26, 27, 28,29, 51, 53, 54, 55, 56, 57, 58and 59

These relays are suitable for use inhigh security circuit breaker tripping

circuits. In particular they can beused in distributed tripping orcontrol relay contact logic schemes,where the initiating contact may beremote from the relay. The relayshave a high burden which is eithercut off at operation or economisedto a low figure, eitherinstantaneously or after a timedelay.

The high burden provides immunityto capacitance discharge currents,which can result at the inception ofan earth fault on battery wiring andimmunity to the subsequent leakagecurrent.

The high burden also permits theuse of supervision relays such astype MVAX where the wiring is atrisk and provides reliable operationof series elements such as repeatrelays type MCAA. For the latterpurpose type MVAJ relays can beprovided with a time delayedeconomising feature.

Figure 1: Type MVAJ relay withdrawn from case

3

Low burden tripping relaystypes MVAJ 11, 13, 14, 15,41, 43, 44, 45

These relays are suitable forapplications where immunity tocapacitance discharge and highminimum operation currents are notrequired.

Low burden self-reset trippingrelay type MVAJ 17

The type MVAJ 17 is a low burdenself-resetting tripping relay whichcomplies with the provisions ofNGC SPEC. NGTS3.63:1996.Its main feature is the facility whichallows the economising element

Relay Contact AC/DC Operation Cut off Specifications Group Outgoing contacts Case sizetype mechanism operation indicator single double single double

stack stack stack stackMVAJ 11 SR AC/DC H/R Economy ESI48-4 EB1 Low burden 5 10 4 4MVAJ 13 HR AC/DC H/R Instantaneous ESI48-4EB1 Low burden 5 10 2 4MVAJ 14 ER AC/DC H/SR Instantaneous ESI48-4EB1 Low burden 5* 10* 2 4MVAJ 15 H/ER AC/DC H/R Instantaneous ESI48-4EB1 Low burden 5* 10* 2 4MVAJ 17 SR AC/DC H/R Economy NGC SPEC.

NGTS 3.6.3:1992 Low burden 5 – 4 –MVAJ 21 SR DC H/R Economy ESI48-4EB2 High burden 5 10 4 4MVAJ 23 HR DC H/R Instantaneous ESI48-4EB2 High burden 4 10 2 4MVAJ 24 ER DC H/R Instantaneous ESI48-4EB2 High burden 4* 9 2 4MVAJ 25 H/ER DC H/R Instantaneous ESI48-4EB2 High burden 4* 9 2 4MVAJ 26 SR DC H/R Time delay ESI48-4EB2 High burden 5 10 4 4

EconomyMVAJ 27 HR DC H/R Time delay ESI48-4EB2 High burden 9 4MVAJ 28 ER DC H.R Time delay ESI48-4EB2 High burden 8 4MVAJ 29 H/ER DC H/R Time delay ESI48-4EB2 High burden 8 4MVAJ 34 ER DC S/R Instantaneous NGC SPEC. Control 7 4

NGTS 2.19:1996 in/out4 stacks

MVAJ 41 SR AC/DC H/R Economy ESI48-4EB1 Lowburden 20 ContactsMVAJ 43 HR AC/DC H/R Instantaneous ESI48-4EB1 Low burden 20 ContactsMVAJ 44 ER AC/DC H/SR Instantaneous ESI48-4EB1 Lowburden * 18 ContactsMVAJ 45 H/ER AC/DC H/R Instantaneous ESI48-4EB1 Lowburden * 18 Contacts All inMVAJ 51 SR DC H/R Economy ESI48-4EB2 Highburden 20 Contacts size 8MVAJ 53 HR DC H/R Instantaneous ESI48-4EB2 High burden 20 Contacts cases

MVAJ 54 ER DC H/R Instantaneous ESI48-4EB2 High burden 18 ContactsMVAJ 55 H/ER DC H/R Instantaneous ESI48-4EB2 High burden 18 ContactsMVAJ 56 SR DC H/R Time delay ESI48-4EB High burden 20 Contacts

EconomyMVAJ 57 HR DC H/R Time delay ESI48-4EB2 High burden 18 ContactsMVAJ 58 ER DC H/R Time delay ESI48-4EB2 High burden 16 ContactsMVAJ 59 H/ER DC H/R Time delay ESI48-4EB2 High burden 16 Contacts

KEY SR - Self reset HR - Hand reset ER - Electrical reset H/ER - Hand/electrical reset H/SR - Hand/self resetNote: Relay types indicated * do not have continuously rated reset coils or internally wired cut-off contacts. If required, one pair of

outgoing contacts may be wired externally for this duty; this will obviously reduce the number of available contacts.

circuit to be connected directly tothe dc supply via case terminals.

Since this reduces the necessarybreak duty on the associatedprotection output relay, this featureis particularly useful when severaltripping relays are operated inparallel.

Control relay type MVAJ 34

This is a dual-rated electrically resetrelay, the main function of which isto switch protection and auto-reclosing equipment in and out ofservice from a remote point via pilotwires. It complies with NGC SPEC.NGTS2.19:1996.

Description

High burden tripping relaystypes MVAJ 21, 23, 24,25, 26,27, 28, 29, 51, 53, 54, 55,56, 57, 58 and 59

All relays use common standardisedparts. Versions have one, two orfour contact stacks depending uponthe number of output contactsrequired.

Types MVAJ 21, 51 highburden self-resetting relays

These relays use a contact on themain contact stack to energise aseparate, rear-mounted economising

Table 1: List of MVAJ types available

4

element. After operation this reducesthe burden by switching inresistance in series with the mainelement and switching out shuntresistance.

Figure 2 shows a typical circuitdiagram for self-resetting relays ofthis type with high speed economy.When the main attracted armatureunit RL1 is energised by theprotection contact PR, a contactRL1-a energises auxiliary elementRL2. When contacts RL2-a and RL2-bopen, resistor R4 is put in series withRL1 while the circuit to resistor R2 isbroken.

Types MVAJ 23, 24, 25, 53,54, 55 high burden trippingrelays with instantaneouscut-off

These relays incorporate a breakcontact in series with the operatecoil. Located on the main contactstack, it is arranged to break thecoil circuit once the relaymechanism has completelyoperated. This reduces the relayburden to zero as soon as

mechanical latching of the contactshas occurred.

Types MVAJ 23 and 53 hand resetwhilst the types MVAJ 24 and 54have a second coil which, whenenergised, unlatches the relayresetting mechanism. Types MVAJ25 and 55 may be reset either byhand or electrically, by means of thesame design of mechanism.See Figure 3.

Type MVAJ 26 and 56 timedelay on drop-off relays

The types MVAJ 26 and 56 relayshave been specially designed forapplications requiring a trippingrelay which is self-resetting after anominal delay of 2 seconds.

This relay may be used, forexample, for intertripping betweenthe higher voltage and lowervoltage circuit breakers of a largethree phase power transformer.This may become necessary whenthe higher voltage circuit breaker istripped after a heavy internal fault,by protection which cannot

conveniently provide an auxiliarycontact with a dwell time longenough to ensure correct tripping ofthe lower voltage circuit breaker.

Typically the relay is initiated bytransformer protection, such asoverall differential, restricted earthfault, and Buchholz relays, inarrangements where both the HVand LV circuit breakers are to betripped simultaneously.

The HV circuit breaker may beexpected to trip more quickly thanthe LV breaker. So the trippingsignal is maintained by the delayedresetting, to ensure completeclearance by the LV circuit breaker,even though the fault may havebeen cleared largely by the HVcircuit breaker and the protectionhas started to reset.

The MVAJ 26 and 56 relays canaccept either a fleeting initiation orpersistent initiation. With the latter,the relay will provide a trippingsignal of corresponding durationplus the 2 seconds delay.

Figure 2: MVAJ 21 self-reset with instantaneous economy (high burden)

Combination of output contactsCombination L. Hand R. Hand

10M 7 19M 1B 7 28M 2B 7 37M 3B 7 46M 4B 7 55M 5B 7 64M 6B 8 43M 7B 8 52M 8B 8 6

Output contacts to module terminalsContact Module terminalsstackL. hand 13 15 17 19 21 23 14 16R. hand 1 3 5 7 9 11 2 4 6 8 10 12

1 M M M M M M2 M M M B M M3 B M M B M M4 B M M B B M5 B B M B B M6 B B M B B B7 M M M M8 B B M B

Contact DescriptionM : MakeB : Break

(a) CT shorting links makebefore (b) & (c) disconnect

(b) Short terminals break before (c)

(c) Long terminals

Case earth1 2

3 4

5 6

7 8

9 10

11 1213 14

15 16

17 18

19 20

21 22

Module terminal block viewed from rear

Note 1

23 24

25 26

27 28

+

_

Left hand Right hand

131517192123

1416

A

2468

1012

13579

11

RL2-A R1 (OP)

R4 RL2-B R2

Rear mounted facing rearviewed from front

A B

RL1-A R3

RL110

RL2PR 27

VxV

28

5

The relay consists of a mainattracted armature element with ahand reset operation indicator andone electromagnet with two contactstacks.

Types MVAJ 27, 28, 29, 57,58, 59 relays with timedelayed drop-off.

These relays are hand reset,electrically reset and hand/electrically reset respectively and allhave time delayed cut-off circuits.The burden is reduced to zero 40/60ms after energisation by the useof a second attracted armatureelement mounted in the rear of thecase. This time delay allows ampletime for any flagging or auxiliaryelement in series with the trippingrelay to operate before cut-off.

Figure 4 shows a typical circuitdiagram for an electrically reset triprelay with time delayed cut-offfeature.

When the contact PR is closed,relays RL1 (operate) and RL2(t)operate. After operation the currentin the coil of RL1 (operate) ismaintained by contact RL2-a;contacts RL1-a and RL1-b open,whilst RL1-c closes.The opening of RL1-a causes relayRL2(t) to start to reset. This resettingis delayed by 40-60ms by means ofa copper slug fitted to the front ofRL2(t). When RL2(t) resets, RL2-aopens, reducing the current throughRL1 (operate) coil to zero.

The relay is now latchedmechanically into the operatedstate. It may now be reset via anexternal contact or push-buttonwhich energises the RL1 (reset) coilvia the closed contact RL1-c.

Figure 3: MVAJ 55 hand and electrically reset (high burden)

Table 1Combination of output contacts

RL1 RL2Combination R. L. R. L.

Hand Hand Hand Hand18M 1 2 1 2

Table 2Output module to module terminals

Contact Module terminalsstack

LH 41 43 45 47 42 44RL1 RH 29 31 33 35 37 39 30 32 34 36 38 40

LH 13 15 17 19 14 16RL2 RH 1 3 5 7 9 11 2 4 6 8 10 12

1 M M M M M M2 M M M2 M M M

Contact descriptionM : MakeB : Break

Note:The numbers quoted in table 1are for L. hand and R. hand stacks on RL1 andRL2. The code numbers used are for crossreferences to module terminals in table 2.

Case earth1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22

Module terminal blockviewed from rear

23 24

25 26

27 28

29 30

31 32

33 34

35 36

37 3839 40

41 42

43 44

45 46

47 48

49 50

51 52

53 54

55 56


13151719 B

1416

A

2468

1012

13579

11


41434547B

4244

A

303234363840

293133353739

Front mounted facing frontviewed from front




(c) Long terminals

Note 1

26

28(OP)(OP)RL19

RL2

RL1(Reset)

(Reset)

RL1-B

RL2-B

25Reset

27PR R1

RL2-A

RL1-AVx

RL29

Low burden tripping relaystypes MVAJ 11, 13, 14, 15,41, 43, 44, 45

These are low burden versions oftypes MVAJ 21, 23, 24, 25, 51,53, 54 and 55 relays respectively.They comply with the less onerousrequirements of ESI 48-4, ClassEB1.

6

Figure 4: MVAJ 28 electrically reset with time delayed cut off (high burden)

Figure 5: MVAJ 13 hand reset (low burden)

Combination of output contactsCombination L. Hand R. Hand8M 8 17M 1B 8 26M 2B 8 35M 3B 8 44M 4B 8 53M 5B 8 62M 6B 8 71M 7B 9 6

8B 9 7

Output contacts to module terminalsContact Module terminalsstackL. hand 13 15 17 19R. hand 1 3 5 7 9 11 2 4 6 8 10 12

1 M M M M M M2 M M M B M M3 B M M B M M4 B M M B B M5 B B M B B M6 B B M B B B7 B B B B B B8 M M9 B B


Combination of output contactsCombination L. Hand R. Hand10M 7 19M 1B 7 28M 2B 7 37M 3B 7 46M 4B 7 55M 5B 7 64M 6B 8 43M 7B 8 52M 8B 8 6

Output contacts to module terminalsContact Module terminalsstackL. hand 13 15 17 19 21 23 14 16R. hand 1 3 5 7 9 11 2 4 6 8 10 12

1 M M M M M M2 M M M B M M3 B M M B M M4 B M M B B M5 B B M B B M6 B B M B B B7 M M M M8 B B M B



13151719C

A 2468

1012

13579

11

RL1-B R1 (OP) RL18

PR 27

+Vx

Case earth1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22


23 24

25 26

27 28

Rear mounted facing rear

(Reset)

R2

RL18

RL1-C

RL2-A

25Reset

B

–28

26

RL1-A R3

A

(t) RL2




(c) Long terminals

Note 1


131517192123

1416

2468

1012

13579

11

Case earth1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22


23 24

25 26

27 28

A


V

R1 (OP) RL110PR 27

28

RL1-A

Vx

2. Resistor fitted on 220/250Vversions only

3. The numbers quoted for L. handand R. hand stacks in table1 arecode numbers used for crossreferences to module terminals intable 2



(c) Long terminals

Notes1.

Table 2

Table 1

7

Technical DataRatings

All relays except MVAJ 17. Rated Operative rangeand MVAJ 34 voltage (V)

(Vx)24/27 14.4 – 32.430/34* 18 – 40.848/54* 28.8 – 64.8110/125* 66 – 150220/250 122 – 300

MVAJ 17 110/125 66 – 150MVAJ 34 dual rated 0Ω pilot 200Ω pilot

48/54 37.5 – 60 46 – 56110/125 87.5 – 137.5 87.5 – 137.5220/250 122 – 286 175 – 275

*These ranges only are applicable to ESI 48-4

BurdensBurden (W)To operate Operated To reset Minimum

Relay Single Double Single Double operatingtype stack stack stack stack current (mA)MVAJ 11 25 50 10 – – 25MVAJ 13 25 50 – – – 25MVAJ 14 25 50 – 15 25 25MVAJ 15 25 50 – 15 25 25MVAJ 17 25 (See Note 2 below) 25MVAJ 21 150 150 10 – – 100MVAJ 23 150 150 – – – 100MVAJ 24 150 150 – 50 50 100MVAJ 25 150 150 – 50 50 100MVAJ 26 150 150 12.5 – – 100MVAJ 27 – 150 – – – 100MVAJ 28 – 150 – – 50 100MVAJ 29 – 150 – – 50 100MVAJ 34 10 – 10 25(See 25 – 25 25Note 3 below) 50 – 25 25MVAJ 41 50 12.5 – 25MVAJ 43 50 – – 25MVAJ 44 50 – 45 25MVAJ 45 50 – 45 25MVAJ 51 150 15 – 100MVAJ 53 150 – – 100MVAJ 54 150 – 70 100MVAJ 55 150 – 70 100MVAJ 56 150 12.5 – 100MVAJ 57 150 – – 100MVAJ 58 150 – 70 100MVAJ 59 150 – 70 100

Note 1: Minimum operating current for relays specified in ESI 48-4 ClassEB1 is 25mA and in EB2 is 50mA for 110V dc rating

Note 2: The burden of the relay before it economises is less than 25W,reducing to 2.1W after. The auxiliary, which is fed from a separatesupply, remains at 3.85W.

Note 3: The 3 sets of burdens quoted for MVAJ 34 apply to the 48/54,110/125 and 220/250V versions respectively.

8

Operating time

MVAJ 34 (0Ω pilot) Not greater than 50ms

MVAJ 34 (200Ω pilot) Not greater than 75ms

All other types Not greater than 10ms at ratedvoltage

Operation indicator

MVAJ 34 The operation indicator follows therelay operation.

Contacts The number of contacts available isshown in Table 1. They may be anycombination of make type andbreak type but with a maximum of8 break.

Contact ratings

Make and carry for 3s ac 7500VA with maximaof 30A and 660V

dc 7500W with maximaof 30A and 660V

Make and carry continuously ac 1250VA with maximaof 5A and 660V

dc 1250W with maximaof 5A and 660V

Break ac 1250V with maximaof 5A and 660V

dc 100W resistive50W inductive with maximaof 5A and 660V

Withstand ratings

MVAJ 17 The relay shall not operate when a1mf capacitor charged to 150V isdischarged into its operate circuit.

The relay is continously ratedat 150V dc.

MVAJ 34 Operation/resetting does not occurwhen 100V ac rms 50/60Hz isapplied to the respective coilcircuits.

The relay (at 50V range or above)will operate with pilot wires havinga resistance of 200Ω.

MVAJ 21 – 29 & 51 – 59 These relays will withstand withoutoperating, the discharge into theiroperate circuits of a 10µF capacitorcharged to a voltage equal to thehighest in the operative range forthe relay

All relays are continously rated withthe exceptions listed in Table 1.

9

Specifications

MVAJ 17 NGC SPEC.NGTS.3.63:1992MVAJ 34 NGC SPEC.NGTS.2.19:1992All other relays IEC 60255

High voltage withstand

Dielectric withstandIEC 60255-5:1977 2kV rms for 1 minute between all

terminals and case earth.

2kV rms for 1 minute betweenterminals of independent circuitsincluding contact circuits,withterminals on each independentcircuits connected together.

1kV rms for 1 minute acrossnormally open contacts.

High voltage impulseIEC 60255-5:1977 Three positive and three negative

impulses of 5kV peak, 1.2/50µs,0.5J between all terminals of thesame circuit (except outputcontacts), between independentcircuits and between all terminalsconnected together and case earth.

Electrical environment

High frequency disturbanceIEC 60255-22-1:1988 Class III 2.5kV peak between independent

circuits and between independentcircuits and case earth.

1.0kV peak across terminals of thesame circuit.

EMC compliance89/336/EEC Compliance to the European

Commission Directive on EMC isclaimed via the TechnicalConstruction File route.

EN 50081-2:1994EN 50082-2:1995 Generic Standards were used to

establish conformity.

Product safety72/23/EEC Compliance with European

Commission Low Voltage Directive

EN 61010-1:1993/A2:1995 Compliance is demonstrated byEN 60950:1992/A11:1997 reference to generic safety

standards.

Atmospheric environment

TemperatureIEC 60255-6:1988 Storage and transit –25°C to +70°C

Operating –25°C to +55°CIEC 6068-2-1:1990/A2:1994 ColdIEC 6068-2-2:1974/A2:1994 Dry Heat

10

HumidityIEC 6068-2-3:1969 56 days at 93% RH and 40°C

Enclosure protectionIEC 60529: 1989 IP50 (dust protected)

Mechanical environment

VibrationIEC 60255-21-1:1988 0.5g between 10Hz and 150Hz

Mechanical durabilityLoaded contact 10,000 operations minimum

Unloaded contact 100,000 operations minimum

CasesMVAJ relays are housed in size 2, 4or 8 cases as indicated in Table 1.Dimensions for these cases areshown in Figures 6, 7 and 8respectively.

Information Requiredwith OrderRelay typeVoltage ratingNumber and combination ofcontacts for tripping dutiesHand reset operation indicatorrequiredInstantaneous or time delayed cut-offcontact

Figure 6: Case outline size 2

45

177

Push buttonprojection 10 max.

32 21225 min.

157 max.

51

48

13

23.54 holes Ø 4.4

168 159

Panel cut-out:Flush mounting fixing details.

All dimensions in mm.

Flush mounting.

11



97

177


32 21225 min.

157 max.

11103

99

52

23.54 holes Ø 4.4

168 159


All dimensions in mm.

Flush mounting.

Reset

200

177


32 21225 min.

157 max.

11206

203

155.4

244 holes Ø 4.4

168 159


All dimensions in mm.Flush mounting.

Reset

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.tde.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 R6015W Printed in England.

MVAJ

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