Vigirex Catalogue

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Earth fault relays withseparate toroids

Vigirex Merlin GerinCatalogue

3

earth fault relayswith separate toroids

Vigirexpage

1/ presentation 2

2/ functions and 5

characteristics

3/ installation 13

and connection

4/ complementary 17

technical information

5/ catalogue numbers 23

4 Merlin Gerin

operation and useOperationVigirex relays are designed for use on lowvoltage AC installations. When the residualcurrent detected by the toroid exceeds acertain threshold, referred to as the residualoperating current In, the Vigirex relay tripsthe associated circuit breaker via a voltagerelease on the breaker.The control signal issued by the relay maybe instantaneous or delayed.Depending on the model, the operatingthresholds and time delays may or may notbe adjustable.

UseVigirex relays are used on low voltage ACinstallations with TT, IT or TNS systemearthing arrangements for voltages up to1000 V AC and frequencies up to 400 Hz.They are particularly well suited for use withCompact and Masterpact circuit breakersequipped with voltage releases.

The choice of the right Vigirex relay model fora given application depends on the type ofprotection required:c additional protection against direct contact;c protection against indirect contact;c protection against fire hazards;c source ground fault protection;c motor protection.These five types of protection are covered bystandards and correspond to different currentthresholds and time delays on the products.

Vigirex: presentation

earth fault relays with separate toroids

E26

350 321NPE

Vigirex

Vigirex:earth fault protectionThe purpose of earth fault protection is tomeasure the earth leakage current of anelectrical installation, or part of aninstallation, and interrupt the supply of powerif this current becomes dangerous to life orproperty.Vigirex is a range of earth fault relays withseparate toroids, a solution offering bothflexibility and performance.

functionsDiscrimination and settingsc discriminationDiscrimination consists in:v dividing the installation into a number ofgroups of circuits and protecting each groupwith an appropriate residual current device,v coordinating the upstream and downstreamdevices such that only the faulty section isshut down.

c settingsDiscrimination is said to be total if theprotection devices meet two conditions:v the non-operating current of the upstreamdevice is higher than the operating current ofthe downstream device,v the non-operating time of the upstreamdevice is longer than the operating time of thedownstream device.

Vigirex relays can be set to obtain up to eightlevels of discrimination, extending from thefinal outgoers up to the circuit breaker at thehead of installation.

I∆n/2 alarm thresholdVigirex type AP relays have an alarmthreshold that warns of a non-criticaldegradation of the insulation, leaving time tocarry out preventive maintenance.The alarm threshold is set automatically atIn∆/2, where I∆/n is the residual operatingcurrent.The alarm is indicated by a LED and operatesan auxiliary contact.

Auxiliary power alarmLoss of the auxiliary power supplying Vigirexrelays is indicated by a LED on the front ofthe device and by the operation of a fail-safealarm contact.

Indication and protectionVigirex relays are available in two versions:c without earth fault memory: indication only.Non-latching relay;c with earth fault memory: indication andcircuit breaker tripping. Latching relay.

standardsc IEC 364 ch 4 and 5;c IEC 755;c IEC 947.2 appendix B;c UTE C 60-130;c VDE 664;c NF C 61-141 ad. 1;c NF C 15-100.

toroidsVigirex relays are used with closed (type A,diameter 30 to 300 mm) or split (type OA,diameter 46 to 110 mm) toroids. All toroidsare easy to mount due to a wide range ofinstallation possibilities.

E26

408

HV/LV

I∆n = 300 mAt = 250 ms

RH ...

I∆n = 100 mAt = 90 ms

RH ...

I∆n = 30 mAt = 0 s

RH ...

RH ... I∆n = 1At = 500 ms

0425

87

Merlin Gerin 5

MERLIN GERIN

RH328A

test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

vigirex

screw terminals

I∆n/2 alarm

auxiliary power

fault

test

reset

I∆n setting

sealable cover

time delays

screw terminals

RH328APEarth fault relay32 residual operating current settings I∆n8 time delaysauxiliary power alarmI∆n/2 alarm

main characteristics of atype AP relayc d immunity to nuisance tripping;c k class A direct component withstand;c continuous monitoring of the detectioncircuit;c operation under all unbalanced phaseconditions;c status indications:v red LED: fault,v orange LED: alarm threshold exceeded(warning),v green LED: auxiliary power on;c discrimination over several levels so thatonly the faulty circuit is shut down;c fault alarm with or without fail-safe feature;c I∆n/2 alarm;c modular case, eight 9 mm modules wide;c horizontal or vertical flush or surfacemounting on a symmetrical rail;c automatic or remote reset.

application examples

model codes

E28

176

protection against fire hazardse.g.: I∆n = 300 mA 90 ms time delay

E28

177

protection of property (motors, etc.)e.g.: I∆n = 3 A 250 ms time delay

E28

175

protection of persons*e.g.: I∆n = 30 mA instantaneous

RH328AP

*depending on the opening time of the circuit breaker orassociated contactor.

E30

466

Merlin Gerin6

7


Vigirex

2/ functions andcharacteristics

page

relay selection 6

RH type E relays 8

RH type A/AP relays 10

toroids 12

8 Merlin Gerin

Vigirex: functions and characteristics

relay selection

type E relays

E18

710

MERLIN GERINvigirexRH240E

test reset

1 2 3 4 5 6 7

8 9 10 11 12 13 14


test reset

1 2 3 4 5 6 7

8 9 10 11 12 13 14


test reset

1 2 3 4 5 6 7

8 9 10 11 12 13 14

E18

712

E18

720

E18

711

MERLIN GERINvigirexRH328A

test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14


test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

E18

716

E18

721

E18

721

E18

717

E18

721

E18

718


test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

E18

720

E18

720

protection installation residual time delay relay associatedoperating toroidscurrent

protection against LV 0.03 or 0 s RH10E type Edirect and indirect 0.3 Acontact+ fire

protection against LV 0.03 to 0 s RH240E type Edirect and indirect 25 Acontact+ fire

protection against LV 0.03 to 0 to 1 s RH248E type Edirect and indirect 25 Acontact+ fire+ motor

type A relays


protection against LV 0.03 or 0 s RH10A type A, OAdirect and indirect 0.3 Acontact+ fire

protection against LV 0.03 to 0 s RH320A type A, OAdirect and indirect 250 Acontact+ fire+ earthconductor

protection against LV 0.03 to 0 to 1 s RH328A type A, OAdirect and indirect 250 Acontact+ fire+ motor+ earthconductor

9Merlin Gerin

type AP relays

MERLIN GERINvigirexRH320AP

test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

E18

714


test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

E18

714

E18

721

E18

721

E18

721


test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

E18

713


protection against LV 0.3 or 0 s RH10AP type A, OAindirect contact 1 A+ fire +

I∆n/2 alarm

protection against LV 0.03 to 0 s RH320AP type A, OAdirect and indirect 250 Acontact ++ fire I∆n/2 alarm+ earthconductor

protection against LV 0.03 to 0 to 1 s RH320AP type A, OAdirect and indirect 250 Acontact ++ fire I∆n/2 alarm+ motor+ earthconductor

Merlin Gerin10


RH type E relays

operationUsed in conjunction with a standardMerlin Gerin toroid (type E), this type ofrelay trips the associated switching devicewhen it detects a residual current above theset residual operating current (I∆n).Depending on the model, tripping is eitherinstantaneous or delayed (RH248E).

Characteristicsc red LED indicates the trip threshold hasbeen exceeded;c failure of the detection circuit (connectingcable and toroid) trips the circuit breaker.

Advantages of the RH248Ec protection can be adapted to anyinstallation;c vertical discrimination possible over anumber of levels.

installationc live part in a disconnectable, insulatingmoulded case, eight 9 mm modules wide,with sealable transparent cover;c horizontal or vertical mounting on asymmetrical rail;c connection by tunnel terminals for 2.5mm2 wire sizes.

(1) Type T2 tropicalisation:c damp heat: 55 °C, 95 % relative humidity,28 cycles (as per IEC 68-2-30) ;c salt spray: 5 % NaCl, 48 hours3 months' storage (as per IEC 68-2-11).(2) Maximum lengths: see table, page 16.

Vigirex relaystype of installation to be monitored

electrical characteristicsI∆n residual operating number of settingscurrent

selector

time delay (ms)device tests local

automaticresetlocal indicationoutput contact number

contact typerating 220/240 V AC p.f. = 0.7

220 V DC L/R = 0 s120 V DC L/R = 0 s48 V DC L/R = 0 s24 V DC L/R = 0 s

max. consumption 48-240 V AC and 48-300 V DC380-480 V AC

auxiliary power supply ACoperating range DC

mechanical characteristicsweight (kg)thermoplastic case disconnectable mountingdegree of protection front panel

case

other characteristicstemperature range operating(as per IEC 755) storageenvironmental conditions tropicalisation

toroidstoroids to be usedtoroid-relay connection

11Merlin Gerin

multipliercoefficient

RH10E RH240E RH248E LV AC - 50/60/400 Hz - type TT IT TNS

1: 30 mA (with toroids TE30 and PE50 only) 24: 30 mA to 25 A, set by 2 selectorsor 300 mA (30 mA to 250 mA: with toroids TE30 and PE50 only, 300 mA to 25 A: all toroids diameters)0 selector 1 : 30, 50, 75, 100, 125, 150, 200, 250

selector 2 : x 1: 30 to 250 mA (with toroids TE30 and PE50) x 10: 300 mA to 2.5 A x 100: 3 A to 25 A

0 0 0, 50, 90, 140, 250, 350, 500, 1000electronic + indicator light + contactdetection circuitlocal, and remote by disconnection of the auxiliary supplyinsulation fault or detection circuit failure by latched indicator light1 1 1changeover, latched5 A 5 A 5 A0.45 A 0.45 A 0.45 A0.65 A 0.65 A 0.65 A2.5 A 2.5 A 2.5 A10 A 10 A 10 A4 VA 4 VA 4 VA5 VA/3 W 5 VA/3 W 5 VA/3 W– 15 % / + 10 % – 15 % / + 10 % – 15 % / + 10 %± 20 % ± 20 % ± 20 %

0.3 kg 0.3 kg 0.3 kghorizontal and vertical horizontal and vertical horizontal and verticalIP 30 IP 30 IP 30IP 20 IP 20 IP 20

– 5 °C to + 55 °C – 5 °C to + 55 °C – 5 °C to + 55 °C– 40 °C to + 70 °C – 40 °C to + 70 °C – 40 °C to + 70 °Ctype T2 (1) type T2 (1) type T2 (1)

type E type E type Eby shielded wire(2) by shielded wire(2) by shielded wire(2)

0420

52

0420

53

0420

54

Merlin Gerin12


RH type A/AP relays

operationUsed in conjunction with a standardMerlin Gerin toroid (type A or OA), this typeof relay trips the associated switchingdevice, after the selected time delay, when itdetects a residual current above the setresidual operating current (I∆n). The APversion also issues an alarm when theresidual current exceeds half the residualoperating current (i.e. I∆n/2).

Characteristicsc green LED indicates presence of auxiliarypower;c red LED indicates the trip threshold hasbeen exceeded;c orange LED indicates the alarm thresholdhas been exceeded (AP);c failure of the detection circuit (connectingcable and toroid) trips the circuit breaker.

Advantagesc protection can be adapted to anyinstallation;c vertical discrimination possible over anumber of levels;c an alarm threshold provides a warning ofa non-critical degradation of the insulation,leaving time to carry out preventivemaintenance;c auxiliary power alarm via fail-safe contact.

installationc live part in a disconnectable, insulatingmoulded case, eight 9 mm modules wide,with sealable transparent cover;c horizontal or vertical flush or surfacemounting on a symmetrical rail;c connection by tunnel terminals for wiresizes:v 1.5 mm2 for terminals 1 to 6;v 2.5 mm2 for terminals 7 to 14.

(1) Type T2 tropicalisation:c damp heat: 55 °C, 95 % relative humidity,28 cycles (as per IEC 68-2-30) ;c salt spray: 5 % NaCl, 48 hours3 months' storage (as per IEC 68-2-11).(2) Maximum lengths: see table, page 16.

Vigirex relaystype of installation to be monitored

electrical characteristicsI∆n residual operating number of settingscurrent selector

time delay (ms)alarm (warning) threshold

time delaydevice tests local

automaticresetlocal indication insulation fault or detection circuit failure indicator light

alarm

output contacts fault numbercontacts

contact type changeover

alarm numbercontact contact type changeoverrating 380/415 V AC p.f. = 0.7

220/240 V AC p.f. = 0.7220 V DC L/R = 0 s120 V DC L/R = 0 s48 V DC L/R = 0 s24 V DC L/R = 0 s

max. consumption 48 to 240 V CA and 48 to 300 V DC380 to 480 V CA

auxiliary power supply ACoperating range DC

mechanical characteristicsweight (kg)thermoplastic case disconnectable mountingdegree of protection front panel

case

other characteristicstemperature range operating(as per IEC 755) storageenvironmental conditions tropicalisation

toroidstoroids to be usedtoroid-relay connection

13Merlin Gerin

0443

22

0425

83

multipliercoefficient

RH10A RH10AP RH320A RH320AP RH328A RH328APfrequency - 50/60/400 Hz - type TT, IT, TNS

1 : 30 mA or 300 mA 300 mA or 1 A 32 : 30 mA to 250 A, set by 2 selectors- - selector 1 : 30, 50, 75, 100, 125, 150, 200, 250 mA

selector 2 : x 1 : 30 to 250 mA x 10 : 300 mA to 2.5 A

x 100 : 3 A to 25 A x 1000 : 30 A to 250 A

0 0 0, 50, 90, 140, 250, 350, 500, 1000.- auto. set to half the - auto. set to half the - auto. set to half the

residual op. current residual op. current residual op. current- 200 ms - 200 ms - 200 mselectronic + indicator light + contactdetection circuitlocal, and remote by disconnecting the auxiliary power supplyby indicator light by indicator light by indicator light by indicator lightwith latching with latching with latching with latching- by indicator light - by indicator light - by indicator light

without latching without latching without latching2 : 1 standard + 1 standard 2 : 1 standard + 1 standard 2 : 1 standard + 1 standard1 fail-safe 1 fail-safe 1 fail-safelatched latched latched or

non-latched0 1 fail-safe 0 1 fail-safe 0 1 fail-safe- non-latched - non-latched - non-latched3 A 3 A 3 A5 A 5 A 5 A0.45 A 0.45 A 0.45 A0.65 A 0.65 A 0.65 A2.5 A 2.5 A 2.5 A10 A 10 A 10 A4 VA - 4 VA - 4 VA -5 VA/3 W 5 VA/3 W 5 VA/3 W– 15 %/+ 10 % – 15 %/+ 10 % – 15 %/+ 10 %± 20 % - ± 20 % - ± 20 % -

0.4 kg 0.4 kg 0.4 kghorizontal and vertical horizontal and vertical horizontal and verticalIP 30 IP 30 IP 30IP 20 IP 20 IP 20

– 5 °C to + 55 °C – 5 °C to + 55 °C – 5 °C to + 55 °C– 40 °C to + 70 °C – 40 °C to + 70 °C – 40 °C to + 70 °Ctype T2(1) type T2(1) type T2(1)

type A, OA type A, OA type A, OAby shielded wire(2) or toroid plugged into relay for TA30 and PA50

0443

20

0425

85

0443

21

0425

87

Merlin Gerin14

electrical characteristicstransformation 1/1000 1/1000 1/1000ratiomaximum permissible c c ccurrent:1 kA continuous -2.5 kA/1 s - 30 kA/0.05 smechanical characteristicsweights (kg) ∅ 30 0.120 0.120

∅ 50 0.200 0.200∅ 80 0.420 0.510∅ 120 0.590 0.690∅ 200 1.320 1.570∅ 300 2.230∅ 46 1.300∅ 110 3.200

other characteristicstemperature range storage – 40 °C to + 70°C – 40 °C to + 70°C – 40 °C to + 70°C operating – 5 °C to + 55 °C – 5 °C to + 55 °C – 5 °C to + 55 °Cdegree of protection IP 20 IP 20 IP 20


toroids

closed toroids, split toroids, closed toroids,type A type OA type Efor: for: for:Vigirex RH10A, RH10AP, H320A, Vigirex RH10A, RH10AP, H320A, Vigirex RH10E, RH240E, RH248ERH320AP, RH328A, RH328AP RH320AP, RH328A, RH328AP

utilisationc closed toroids for new installations c split toroids for renovations c closed toroids for new installationsand extensions. and extensions. and extensions.

functionsc detect the leakage current and c detect the leakage current and c detect the leakage current andtransmit a proportional signal to transmit a proportional signal to transmit a proportional signal tothe associated relay. the associated relay. the associated relay.

installationc enclosed in an insulated c enclosed in an insulated c enclosed in an insulatedcasing; casing; casing;c mounting, 3 possibilities: c mounted on plate or cable. c mounted on plate or cable.v ∅ 30-50 for clipping ontoVigirex relay,v ∅ 30-50-80 on a symmetrical rail;v any diameter on plate and cables;c connection:v ∅ 30-50 plugged directly intoVigirex relay,v ∅ 30 to 200 by connectors for0.22 mm2 wires min.;v ∅ 300 by 6.35 mm tab connectors.

dimensionstype A ∅ (mm) type OA ∅ (mm) type E ∅ (mm)TA 30 POA 46 TE30 30 (all settings)PA 50 GOA 110 PE50 50 (all settings)IA 80 IE80 80 (settings u 300 mA)MA 120 ME120 120 (settings u 300 mA)SA 200 SE200 200 (settings u 300 mA)GA 300

0425

89

0425

96

0513

52

15


Vigirex

3/ installationand connection

page

relays 14

toroids 15

auxiliaries 16

Merlin Gerin16

Vigirex: installation and connection

relays

RH10E-RH240E-RH248E


test reset

1 2 3 4 5 6 7

8 9 10 11 12 13 14

8 9

1 2 3 6 7

ut

aa

1 2

t

NL1L2L3

Key:aa: auxiliary power supplyt : type A, AO, or E toroid depending onrelayut:RH10E, RH240E, RH248Eut: used for control of a switching deviceRH10A, RH320A, RH328Aut1, ut2: remote indication or controlof a switching deviceut1: standard changeover contactut2: fail-safe contactRH10AP, RH320AP, RH328APut1: standard changeover contact forcontrol of a switching deviceut2: fail-safe alarm contact


test

reset

on

1 2 3 4 5 6

7 8 9 10 11 12 13 14

RH10A/AP-RH320A/AP-RH328A/AP

7 8

5

ut1aa

1

t

NL1L2L3

62

9 10 11 12 13 14

ut2

RH10E-RH240E-RH248E RH10A/AP-RH320A/AP-RH328A/APMounted on symmetrical rail IP 20 Flush mounting IP 30 Surface mounting IP 20

72

8145

446065,5

73

46

6573,5

E18

710

E18

710

E18

718

E26

292

E26

290

E26

291

E18

459

E18

460

73,537,5

45

7257

66

2 Ø4,2 4

81

10,5

17Merlin Gerin

toroidstype A types A and E type Ediam. 30 and 50 diam. 80 to 200 diam. 30 and 50

B

LDC

KF G

E

12

3

H

J

Ø Ø5

Ø

F

B

8

C

D

E

5

16

4

2921

2 Ø4,5

type ∅ B C D E FTA30 30 31 60 53 82 50PA50 52 45 87 66 108 60

H G

E

Ø

B

D

12F

J

K

L

C

Ø5

type A type OAdiam. 300 diam. 46 and 110

HLØ

L

HØB

Ø5

type ∅ H L B CPOA 46 68 148 57 38

GOA 110 68 224 76 44

type ∅ H LGA300 299 29 344

type ∅ B C D E F G H J K LTE30 27 60 22 18 75 45 25 18 4 34 28

PE50 50 86 22 18 101 61 41 33 5 50 28

Vigirex

immunity to lineovercurrentsLine overcurrents due to motor starting ortransformer switching may causeunnecessary tripping of residual currenttype relays.This can be avoided by a few very simpleprecautions with cumulative effects:c place the toroid on a straight section ofcable;c centre the cable in the toroid;c use a toroid with a much larger diameterthan the cable going through it2 x dia (fig.1).

For very severe operating conditions, theuse of a mild steel sleeve placed around thecable inside the toroid considerablyincreases immunity.Recommended characteristics:c mild steel foil 0.1 mm thick to be wrappedseveral times around the cable inside thetoroid (minimum thickness 1 mm);c inner diameter of the toroid > 1.4 x outerdiameter of the cable bundle (fig. 2).

A, OA, E toroidsassociated with the Vigirex

type ∅ B C D E F G H J K LIA80, IE80 80 122 26.5 35 150 80 55 40 126 65 44MA120, ME120 120 164 26.5 35 190 80 55 40 166 65 44

SA200, SE200 196 256 29 37 274 120 90 60 255 104 46

Toroid locationc on all the cables (phases and neutral) of afeeder downstream of the switching deviceassociated with the Vigirex;c for a TT system, if a toroid cannot beinstalled on a transformer output (busbars orcables in parallel): place a toroid on thetransformer neutral-earth path.

toroid A, OA E E∅ mm 30 to 300 30 and 50 80 to 200relaysRH10E c vRH240E c vRH248E c vRH10A cRH320A cRH328A cRH10AP cRH320AP cRH328AP c

E24

291

E18

664

E18

722

E12

110

E24

293

E24

294


toroids

figure 2figure 1

Keyv these toroids can only be used with relayshaving I∆n residual operating currentsgreater than 300 mA;c no residual operating current restrictions.

N 1 2 3 PE

E13

856

A

E13

856B

N 1 2 3 PE

18 Merlin Gerin


auxiliaries

resistance must not exceed 3 ohms;c shielded wires: available with 1 or 2conductors in reels of 20 or 100 m;c cable size 0.22 mm2.

examples of type A mountingOn Vigirex, diam. 30 or 50 On rail, diam. 30 to 80 On plate, type A or E, diam. 30 to 200

0425

90

0425

92

0443

24

On cable, diam. 120 to 300

0443

23

0425

93

0425

91

toroid-relay connection circuitwire size (mm 2) max. length (m)0,22 180,75 601 801,5 1252,5 200c the maximum toroid-relays connection

19


Vigirex

4/ complementarytechnical information

page

implementation of residualcurrent devices 18

electrical systems 20

useful definitions 21

improvement of operating conditions - implementation ofdiscrimination between residual current devices

20 Merlin Gerin

Vigirex: complementary technical information

implementationof residual current devices (RCDs)

The use of residual current devices isdescribed below according to the type ofelectrical system (TT, TN or IT).Protection of sensitive locations against firehazards must also be considered.For such locations, a residual current devicewith a residual operating current i 300 mAshould be provided at the head of the feederconcerned.

introduction

TT systems exposed conductive parts interconnected and connectedto the same earthing electrode

1. Condition satisfiedA single device at the head of the installationis sufficient to ensure protection againstelectric shock.Its residual operating current is selectedaccording to the resistance of the earthingsystem.

2. Condition not satisfiedThis is the case in particular in installationswhere the loads are far apart.It is essential to have:c one RCD per group of interconnectedexposed conductive parts;c one RCD at the head of the installation,unless the head circuit breaker and the maincircuit breakers are in the sameswitchboard or in switchboards located nextto one another (or linked by a class IIconnection).

Horizontal discriminationThis technique consists of transferring theresidual current protection from the head ofthe installation to the downstream feeders:in this case, power is cut only on the faultyfeeder. It is not possible unless the headcircuit breaker and the main circuit breakersare in the same switchboard or inswitchboards located next to one another (orlinked by a class II connection).

Vertical discriminationDownstream of the head circuit breaker, themain circuit breakers are provided withRCDs. In this case, power is cut only on thefaulty feeder, subject to compliance with thefollowing rules:I∆nA > 2 x I∆nB,T no A > T brk B,I∆nA and I∆nB are the residual operatingcurrents of RCDs A and B,T no A = non operating time of A,T brk B = total break time of B (including thetime due to the switching device).

E26

964

E26

963

E26

962

E26

961 HV/LV

RB RA

RCD

HV/LV

RCD

RB RA2

RCD

RA1

RCD

HV/LV

RB RA

RCDRCD

RCD

ARCD

B

earthingpath

HV/LV

RB RA

CIM

RCD

Merlin Gerin 21Merlin Gerin 21

exposed conductive parts interconnected and connectedto the same earthing electrode, itself connected to thesubstation earthing system

IT systems

1. Condition not satisfiedc substation earthing system not connectedto exposed conductive parts: place an RCDat the head of the installation;c exposed conductive parts notinterconnected:place an RCD on each group of exposedconductive parts. To be supplemented by anRCD at the head of the installation unlessthe head circuit breaker and the main circuitbreakers are in the same switchboard or inswitchboards located next to one another (orlinked by a class II connection).

Note: CIM is insulation monitoring device.

2. Condition satisfiedProtection against electric shock in the eventof a double fault is provided by theovercurrent protection.Residual current devices must be used inthe following cases:c feeder with excessive cable length;c circuit supplying portable equipment (suchas socket outlet circuits);c circuit where there is a risk of theprotective conductor breaking.

Safety against electric shock is ensured bythe overcurrent protection. Residual currentdevices must be used in the following cases:c feeder with excessive cable length;c circuit supplying portable equipment (suchas socket outlet circuits);c circuit where there is a risk of theprotective conductor breaking.

TN systems

E26

965

E26

966

E26

967

L1L2L3N

HV/LV

PE

RCD

TNC system TNS system

RB

PE

HV/LV

RCD

RB RA 2

RCD

RA 1

CIM

RCD

22 Merlin Gerin


electrical systems

consequences of aninsulation fault

ReminderAn insulation fault occurs when a liveconductor - phase or neutral - comes incontact with an exposed conductive part(e.g. motor casing).

ConsequencesThe consequences depend upon the type ofelectrical system (TT, IT or TN) used in theinstallation or part of installation concerned.Such faults create hazards to life and property.

TT systems An insulation fault between phase and earthcauses a current flow which is limited inpractice only by the earthing resistances Rnand RA. Hazardous voltages exist on theexposed conductive parts. The fault currentis a few amperes.

Tripping is essential.

In the example opposite, with the followingvalues for RA and Rn.RA = 20 Ω ; Rn = 10 Ω.The fault current is 7.3 (220 V/30 ohms) andthe voltage Ud on the exposed conductiveparts is 147 V.

The fault current depends on the insulationimpedance (Zct) of the installation in normaloperation.As this impedance is high by its nature, thefault current is relatively low. The same istrue for the voltage on the exposedconductive parts.

Tripping is unnecessary.The fault must be reported, located andeliminated.In this example, with Zct = 3500 ohms(case of a 1 km installation).The fault current is 62 mA (220 V/3500 ohms).The touch voltage Uc between the twosimultaneously accessible exposedconductive parts depends on the resistanceRAB of link AB.In an extreme case where RAB = 2 ohms,Uc = 2 x 0.062 = 0.124 V.

IT systems

TN systems

E26

971

E26

969

E26

968

If a second fault occurs before the first faulthas been cleared, it rapidly becomes a shortcircuit between phases (or between phaseand neutral), with the followingconsequences:c the exposed conductive parts carry a highvoltage;c the fault current is equal to the short-circuitcurrent.

Tripping is essential.The initial voltage on the busbar supplyingthe two feeders must be estimated at80 percent of the nominal voltage betweenphases.As the loop impedance is 99 milliohms(neglecting the reactances), the fault currentis equal to 3070 A (380 x 0.8/0.099).The touch voltage Uc is equal to half theinitial voltage, i.e.: 0.8 x 380/2 = 152 V.

An insulation fault results in a short-circuitbetween phase and neutral.The resulting current flow is high. Theexposed conductive parts are at ahazardous voltage.

Tripping is essential.

The initial voltage on the faulty feeder mustbe estimated at 80 percent of the nominalvoltage between phase and neutral. Thetouch voltage Uc is equal to half 0.8 x 220 V,i.e. 88 V.

E26

970

L1L2L3N

HV/380V

UdRn : 10Ω RA : 20Ω

L1L2L3PE

HV/380V

Rn

A

Zct

Uc

B

Id

L1L2L3PE

HV/380V

Rn

Zct

Uc

50 m50 mm2

Ra

30 m25 mm2

Id

L1L2L3PEN

HV/380V

RnA Uc

Merlin Gerin 23


useful definitions

The definitions below are intended forpractical purposes only and do not claim tobe exhaustive or theoretical.

Protective conductor PEConductor used for protection againstindirect contact and for interconnectingexposed conductive parts:c to one another;c to extraneous conductive parts;c to earthing electrodes or earthed parts.The presence of switchgear on suchconductors is prohibited.

Residual currentRoot-mean-square vector sum of thecurrents flowing through all the liveconductors. It is equal to zero in theabsence of an insulation fault. In case of aninsulation fault, the residual current is theleakage current returned to thesource through the earth and the protectiveconductor.For the value of I∆n, see residual operatingcurrent.

Residual current device (RCD)A device that opens the associatedswitchgear when it detects a residual currentabove its residual operating current I∆n (seeresidual current).

Residual operating current (I ∆n)Value of the residual current which causes aresidual current device to operate.

Service voltagePreferred term: rated operating voltage.The rated operating voltage Ue of a systemis the voltage which, together with the ratedcurrent of the system, determines the load.For three-phase systems, it is the voltagebetween phases.

Shock protection deviceThis device must automatically separatefrom the source any part of theinstallation on which there is a faulthazardous to life.Depending on the system earthing arrange-ment of the installation, this device is eithera residual current device (characterised byI∆n, its residual operating current, and itstotal break time) or an overcurrent device(fuse or circuit breaker).

break timeTotal time from fault detection to completearc extinction.

Time delayIntentional delay before operation of adevice.The time delay on operation of an upstreamcircuit breaker allows time discriminationwith the downstream circuit breaker.The time delay, which is voluntary, shouldnot be confused with the break time of adevice which is intrinsic to the device.

Touch voltageVoltage in case of an insulation faultacross simultaneously accessible parts.

Uc = f(t) safety curveUc = f(t) is the maximum voltage that thehuman body can withstand for a givenperiod of time, depending on externalconditions (nature of the premises, presenceof water, etc. - see NF C 15-100,Sec. 481.1.1, table 48A).

Direct contactContact of persons with the normally liveparts of electrical equipment.

DiscriminationCoordination of the automatic switchingdevices such that only the faulty part of theinstallation is cut off by opening of the devicelocated immediately upstream of the fault.

Double insulationinsulation including both:c basic insulation required for protectionagainst direct contact, andc supplementary insulation required forprotection against indirect contact in caseof a fault of the basic insulation.

Exposed conductive partAny accessible metal part of an electricalequipment item other than the live parts andwhich can accidentally become live.

Fault (electrical)Accidental connection between two points atdifferent potentials, such as aninsulation fault. A fault may be solid or mayexhibit a certain impedance. A solid faultbetween live conductors is a short circuit.A distinction is made between phase-exposed conductive parts, phase-earth,phase-phase, phase-neutral, neutral-exposed conductive parts and neutral-earthfaults.

Fault voltageVoltage, in case of an insulation fault,across an exposed conductive part and anearthing reference, i.e. a point on which thevoltage is not modified when the exposedconductive part becomes live.

Indirect contactContact of persons with exposed conductiveparts accidentally live due to an insulationfault.

Insulation voltagePreferred term: rated insulation voltage. Therated insulation voltage of an assembly isthe voltage characterising it and used asreference for the dielectric tests, the isolatingdistances and the creepage distance.

Live conductorConductor used for transmission of electricalpower during normal operation (including theneutral conductor).

PEN conductorIn a TNC system, acts both as neutralconductor and as protective conductor(size u 10 mm2).The presence of switchgear on suchconductors is prohibited.

Merlin Gerin24

25


Vigirex

5/ catalogue numberspage

earth fault relays

accessories and toroids

Merlin Gerin24

protection against direct and indirect contact + firenetwork BT 50/60 Hzsensitivity 0.03 or 0.3 Atime delay 0 ssingle phase auxiliary power supply (V) i∆n = 30 mA i∆n = 300 mA48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz

protection against direct and indirect contact + firenetwork BT 50/60 Hzsensitivity 0.03 to 25 Atime delay 0 ssingle phase auxiliary power supply (V)48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz

protection against direct and indirect contact + fire + motornetwork BT 50/60 Hzsensitivity 0.03 to 25 Atime delay 0 to 1 ssingle phase auxiliary power supply (V)48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz

protection against direct and indirect contact + firenetwork BT 50/60/400 Hzsensitivity 0.03 to 0.3 Atime delay 0 ssingle phase auxiliary power supply (V) i∆n = 30 mA i∆n = 300 mA48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz

protection against direct and indirect contact + fire + earth conductornetwork BT 50/60/400 Hzsensitivity 0.03 to 250 Atime delay 0 ssingle phase auxiliary power supply (V)48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz

Vigirex: price list

earth leak age rel ays with separate to roids

earth leakage relay RH10E


50622

1414131312121111101099

test

11 22 33 44 55 66 77

88

reset

300mA

inst.


50632

1414131312121111101099

test

11 22 33 44 55 66 77

88

reset

30

50

75

100 125

150

200

250x1

x10 x100

mA


50632

1414131312121111101099

test

11 22 33 44 55 66 77

88

reset

inst.

50

90

140 250

350

500

1000

mS30

50

75

100 125

150

200

250x1

x10 x100

mA

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

MERLIN GERINvigirex

RH10A

50637

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

MERLIN GERINvigirex

RH320A

50646

A0,1

0,03

0,2

0,125

0,25

0,05

0,075 0,15

x1

x0,1

x10

x100


earth leakage relay RH10A



50453

504525045450623

50456

504555045750628

50459

504585046050633

50736

50735507375064150642

50739

50738507405064750648

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.

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.

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.

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.

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.

50450

504495045150621

50733

50732507345063850639

.

.

.

.

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.

.

.

Merlin Gerin 25

protection against direct and indirect contact + fire + earth conductor + motornetwork BT 50/60/400 Hzsensitivity 0.03 to 250 Atime delay 0 to 1 ssingle phase auxiliary power supply (V) standard standard

latched relay unlatched relay+ fail safe + fail safelatched relay unlatched relay

12 V DC24 V DC48 V AC 50/60 Hz48 to 120 V DC110 to 130 V AC 50/60 Hz220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz500 to 525 V AC 50/60 Hz

protection against indirect contact + firenetwork BT 50/60/400 Hzsensitivity 0.3 or 1 A + warningtime delay 0 ssingle phase auxiliary power supply (V) i∆n = 300 mA i∆n = 1 A220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz

protection against direct and indirect contact + fire + earth conductornetwork BT 50/60/400 Hzsensitivity 0.03 to 250 A + warningtime delay 0 ssingle phase auxiliary power supply (V)220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz500 to 525 V AC 50/60 Hz

protection against direct and indirect contact + fire + earth conductor + motornetwork BT 50/60/400 Hzsensitivity 0.03 to 250 A + warningtime delay 0 to 1 ssingle phase auxiliary power supply (V) latched unlatched

relay relay220 to 240 V AC 50/60 Hz380 to 415 V AC 50/60 Hz440 to 480 V AC 50/60 Hz500 to 525 V AC 50/60 Hz

protection against direct contact (30 mA)specific for command motor by Telemecanique ATV66 variable speed controllersingle phase auxiliary power supply (V)220 to 240 V AC 50/60 Hz

unit price (excl. VAT) in French francs


.

.

.

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.

.

.

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.

.

.

.

.

.

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

140

inst.

500

250

1s

50

90 350

mS

MERLIN GERINvigirex

RH328A

50652

A0,1

0,03

0,2

0,125

0,25

0,05

0,075 0,15

x1

x0,1

x10

x100

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

MERLIN GERINvigirex

RH10AP

50652

earth leakage relay RH10AP

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

MERLIN GERINvigirex

RH320AP

50652

A0,1

0,03

0,2

0,125

0,25

0,05

0,075 0,15

x1

x0,1

x10

x100


test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

140

inst.

500

250

1s

50

90 350

mS

MERLIN GERINvigirex

RH328AP

50652

A0,1

0,03

0,2

0,125

0,25

0,05

0,075 0,15

x1

x0,1

x10

x100


50746

5074550747506575065850659

506665066750668

50672506735067450675

50683506845068550686

50055

earth leakage relay RH328AF

test

reset

7 8 9 10 11 12 13 147 8 9 10 11 12 13 14

11 2 3 4 5 62 3 4 5 6

on

140

inst.

500

250

1s

50

90 350

mS

MERLIN GERINvigirex

RH328A

50652

A0,1

0,03

0,2

0,125

0,25

0,05

0,075 0,15

x1

x0,1

x10

x100

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.

506615066250743

5074250744506535065450655

506635066450665

50679506805068150682

Merlin Gerin26

Vigirex: price list

earth leak age rel ays with separate to roids

accessories and toroids

unit price (excl. VAT) in french francs

toroid-relay link

toroids for RH10A/AP -RH320A/AP - RH328A/AP

toroids for RH10E -RH240E - RH248E

5013750136

504375043850439504405044150442

5048550486

5043050431504325043350434

screened cable (cable size 0.22 mm2)1 conductor 2 conductors

roll of 20 mroll of 100 m

closed toroid, type Atype Ø (mm)TA 30PA 50IA 80MA 120SA 200GA 300

opening toroid, type OAtype Ø (mm)POA 46GOA 110

closed toroid, type Etype Ø (mm)TE30 30PE50 50IE80 80ME120 120SE200 200

5015750158

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As standards, specifications and designs change from time to time, please ask for confirmationof the information given iin this publication

ce document a été imprimé sur du papier écologique.

BTP207E 09-99

This document has been printed on ecological paper

Schneider Electric Industries SA

5, rue Nadar92506 Rueil-Malmaison Cedex FranceTel : +33 (0)1 41 29 82 00Fax : +33 (0)1 47 51 80 20

http://www.schneiderelectric.com

Design: Schneider Electric - AMEGPhoto: Schneider ElectricPrinted:

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