* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Earth fault relays with separate toroids Vigirex Merlin Gerin
Stepper motor wikipedia , lookup
Electric power system wikipedia , lookup
Electrical ballast wikipedia , lookup
Skin effect wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Power engineering wikipedia , lookup
Mercury-arc valve wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current source wikipedia , lookup
History of electric power transmission wikipedia , lookup
Portable appliance testing wikipedia , lookup
Voltage optimisation wikipedia , lookup
Three-phase electric power wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Circuit breaker wikipedia , lookup
Buck converter wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Opto-isolator wikipedia , lookup
Electrical substation wikipedia , lookup
Mains electricity wikipedia , lookup
Fault tolerance wikipedia , lookup
Surge protector wikipedia , lookup
Stray voltage wikipedia , lookup
National Electrical Code wikipedia , lookup
Alternating current wikipedia , lookup
Ground (electricity) wikipedia , lookup
Electrical wiring in the United Kingdom wikipedia , lookup
Residual-current device wikipedia , lookup
Earth fault relays with separate toroids Catalogue Vigirex Merlin Gerin We do more with electricity earth fault relays with separate toroids Vigirex page 1/ presentation 2 2/ functions and characteristics 5 3/ installation and connection 13 4/ complementary technical information 17 5/ catalogue numbers 23 3 Vigirex: presentation 042587 earth fault relays with separate toroids The choice of the right Vigirex relay model for a given application depends on the type of protection 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 by standards and correspond to different current thresholds and time delays on the products. Operation Vigirex relays are designed for use on low voltage AC installations. When the residual current detected by the toroid exceeds a certain threshold, referred to as the residual operating current In, the Vigirex relay trips the associated circuit breaker via a voltage release on the breaker. The control signal issued by the relay may be instantaneous or delayed. Depending on the model, the operating thresholds and time delays may or may not be adjustable. Vigirex: earth fault protection functions Auxiliary power alarm Loss of the auxiliary power supplying Vigirex relays is indicated by a LED on the front of the device and by the operation of a fail-safe alarm contact. Discrimination and settings c discrimination Discrimination consists in: v dividing the installation into a number of groups of circuits and protecting each group with an appropriate residual current device, v coordinating the upstream and downstream devices such that only the faulty section is shut down. Vigirex relays can be set to obtain up to eight levels of discrimination, extending from the final outgoers up to the circuit breaker at the head of installation. I∆n/2 alarm threshold Vigirex type AP relays have an alarm threshold that warns of a non-critical degradation of the insulation, leaving time to carry out preventive maintenance. The alarm threshold is set automatically at In∆/2, where I∆/n is the residual operating current. The alarm is indicated by a LED and operates an auxiliary contact. 4 PE N 1 2 3 Use Vigirex relays are used on low voltage AC installations with TT, IT or TNS system earthing arrangements for voltages up to 1000 V AC and frequencies up to 400 Hz. They are particularly well suited for use with Compact and Masterpact circuit breakers equipped with voltage releases. The purpose of earth fault protection is to measure the earth leakage current of an electrical installation, or part of an installation, and interrupt the supply of power if this current becomes dangerous to life or property. Vigirex is a range of earth fault relays with separate toroids, a solution offering both flexibility and performance. Indication and protection Vigirex relays are available in two versions: c without earth fault memory: indication only. Non-latching relay; c with earth fault memory: indication and circuit breaker tripping. Latching relay. E26408 c settings Discrimination is said to be total if the protection devices meet two conditions: v the non-operating current of the upstream device is higher than the operating current of the downstream device, v the non-operating time of the upstream device is longer than the operating time of the downstream device. E26350 operation and use RH ... Vigirex standards c 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. toroids Vigirex relays are used with closed (type A, diameter 30 to 300 mm) or split (type OA, diameter 46 to 110 mm) toroids. All toroids are easy to mount due to a wide range of installation possibilities. I∆n = 1A t = 500 ms HV/LV I∆n = 300 mA t = 250 ms RH ... I∆n = 100 mA t = 90 ms RH ... I∆n = 30 mA t=0s RH ... Merlin Gerin model codes RH328AP Earth fault relay 32 residual operating current settings I∆n 8 time delays auxiliary power alarm I∆n/2 alarm screw terminals E30466 main characteristics of a type AP relay I∆n/2 alarm c d immunity to nuisance tripping; c k class A direct component withstand; c continuous monitoring of the detection circuit; c operation under all unbalanced phase conditions; 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 that only 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 surface mounting on a symmetrical rail; c automatic or remote reset. 1 2 3 4 5 6 auxiliary power fault MERLIN GERIN vigirex RH328A on test test reset reset I∆n setting 7 8 9 10 11 12 13 14 screw terminals RH328AP sealable cover time delays E28177 E28176 E28175 application examples protection of persons* e.g.: I∆n = 30 mA instantaneous protection against fire hazards e.g.: I∆n = 300 mA 90 ms time delay protection of property (motors, etc.) e.g.: I∆n = 3 A 250 ms time delay *depending on the opening time of the circuit breaker or associated contactor. Merlin Gerin 5 6 Merlin Gerin earth fault relays with separate toroids Vigirex 2/ functions and characteristics page relay selection 6 RH type E relays RH type A/AP relays 8 10 toroids 12 7 Vigirex: functions and characteristics relay selection type E relays relay associated toroids 0 s RH10E type E 1 5 4 3 2 7 6 MERLIN GERIN vigirex RH240E reset test 8 protection against LV direct and indirect contact + fire E18720 time delay 0.03 to 25 A 0 s 10 11 12 13 14 9 RH240E 1 3 2 4 type E 5 7 6 E18720 protection against LV direct and indirect contact + fire residual operating current 0.03 or 0.3 A E18710 installation E18711 protection MERLIN GERIN vigirex RH240E reset test 8 0 to 1 s RH248E type E 1 3 2 4 5 E18720 0.03 to 25 A E18712 protection against LV direct and indirect contact + fire + motor 10 11 12 13 14 9 7 6 MERLIN GERIN vigirex RH248E reset test 8 10 11 12 13 14 9 installation protection against LV direct and indirect contact + fire residual operating current 0.03 or 0.3 A time delay relay associated toroids 0 s RH10A type A, OA E18716 protection 1 2 3 4 5 6 E18721 type A relays MERLIN GERIN vigirex RH10A on test reset 0 s RH320A type A, OA E18721 0.03 to 250 A E18717 protection against LV direct and indirect contact + fire + earth conductor 9 10 11 12 13 14 8 7 1 2 3 4 5 6 MERLIN GERIN vigirex RH320A on test reset 0.03 to 250 A 0 to 1 s RH328A type A, OA 1 2 3 4 5 6 MERLIN GERIN vigirex RH328A on test reset 7 8 9 10 11 12 13 14 E18718 protection against LV direct and indirect contact + fire + motor + earth conductor 8 E18721 7 8 9 10 11 12 13 14 Merlin Gerin type AP relays relay associated toroids RH10AP type A, OA E18721 installation residual time delay operating current protection against LV 0.3 or 0 s indirect contact 1 A + fire + I∆n/2 alarm E18713 protection 1 2 3 4 5 6 MERLIN GERIN vigirex RH10AP on test reset 0.03 to 0 s 250 A + I∆n/2 alarm 9 10 11 12 13 14 RH320AP type A, OA E18714 protection against LV direct and indirect contact + fire + earth conductor 8 1 2 3 4 5 6 E18721 7 MERLIN GERIN vigirex RH320AP on test reset 0.03 to 0 to 1 s 250 A + I∆n/2 alarm RH320AP type A, OA 1 2 3 4 5 6 MERLIN GERIN vigirex RH320AP on test reset 7 Merlin Gerin 9 10 11 12 13 14 E18714 protection against LV direct and indirect contact + fire + motor + earth conductor 8 E18721 7 8 9 10 11 12 13 14 9 Vigirex: functions and characteristics RH type E relays operation Used in conjunction with a standard Merlin Gerin toroid (type E), this type of relay trips the associated switching device when it detects a residual current above the set residual operating current (I∆n). Depending on the model, tripping is either instantaneous or delayed (RH248E). Characteristics c red LED indicates the trip threshold has been exceeded; c failure of the detection circuit (connecting cable and toroid) trips the circuit breaker. Advantages of the RH248E c protection can be adapted to any installation; c vertical discrimination possible over a number of levels. installation c live part in a disconnectable, insulating moulded case, eight 9 mm modules wide, with sealable transparent cover; c horizontal or vertical mounting on a symmetrical rail; c connection by tunnel terminals for 2.5 mm2 wire sizes. Vigirex relays type of installation to be monitored electrical characteristics I∆n residual operating current number of settings selector time delay (ms) device tests reset local indication output contact max. consumption auxiliary power supply operating range local automatic number contact type rating 220/240 V AC p.f. = 0.7 220 V DC L/R = 0 s 120 V DC L/R = 0 s 48 V DC L/R = 0 s 24 V DC L/R = 0 s 48-240 V AC and 48-300 V DC 380-480 V AC AC DC mechanical characteristics weight (kg) thermoplastic case degree of protection disconnectable front panel case mounting other characteristics temperature range operating (as per IEC 755) storage environmental conditions tropicalisation toroids toroids to be used toroid-relay connection (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 hours 3 months' storage (as per IEC 68-2-11). (2) Maximum lengths: see table, page 16. 10 Merlin Gerin RH240E 042054 042053 042052 RH10E RH248E LV AC - 50/60/400 Hz - type TT IT TNS 1: 30 mA (with toroids TE30 and PE50 only) or 300 mA 0 24: 30 mA to 25 A, set by 2 selectors (30 mA to 250 mA: with toroids TE30 and PE50 only, 300 mA to 25 A: all toroids diameters) selector 1 : 30, 50, 75, 100, 125, 150, 200, 250 selector 2 : x 1: 30 to 250 mA (with toroids TE30 and PE50) multiplier x 10: 300 mA to 2.5 A coefficient x 100: 3 A to 25 A 0 0, 50, 90, 140, 250, 350, 500, 1000 0 electronic + indicator light + contact detection circuit local, and remote by disconnection of the auxiliary supply insulation fault or detection circuit failure by latched indicator light 1 1 changeover, latched 5A 5A 0.45 A 0.45 A 0.65 A 0.65 A 2.5 A 2.5 A 10 A 10 A 4 VA 4 VA 5 VA/3 W 5 VA/3 W – 15 % / + 10 % – 15 % / + 10 % ± 20 % ± 20 % 5A 0.45 A 0.65 A 2.5 A 10 A 4 VA 5 VA/3 W – 15 % / + 10 % ± 20 % 0.3 kg horizontal and vertical IP 30 IP 20 0.3 kg horizontal and vertical IP 30 IP 20 0.3 kg horizontal and vertical IP 30 IP 20 – 5 °C to + 55 °C – 40 °C to + 70 °C type T2 (1) – 5 °C to + 55 °C – 40 °C to + 70 °C type T2 (1) – 5 °C to + 55 °C – 40 °C to + 70 °C type T2 (1) type E by shielded wire(2) type E by shielded wire(2) type E by shielded wire(2) Merlin Gerin 1 11 Vigirex: functions and characteristics RH type A/AP relays operation Used in conjunction with a standard Merlin Gerin toroid (type A or OA), this type of relay trips the associated switching device, after the selected time delay, when it detects a residual current above the set residual operating current (I∆n). The AP version also issues an alarm when the residual current exceeds half the residual operating current (i.e. I∆n/2). Characteristics c green LED indicates presence of auxiliary power; c red LED indicates the trip threshold has been exceeded; c orange LED indicates the alarm threshold has been exceeded (AP); c failure of the detection circuit (connecting cable and toroid) trips the circuit breaker. Advantages c protection can be adapted to any installation; c vertical discrimination possible over a number of levels; c an alarm threshold provides a warning of a non-critical degradation of the insulation, leaving time to carry out preventive maintenance; c auxiliary power alarm via fail-safe contact. installation Vigirex relays type of installation to be monitored electrical characteristics I∆n residual operating current number of settings selector time delay (ms) alarm (warning) threshold device tests reset local indication time delay local automatic insulation fault or detection circuit failure indicator light alarm output contacts c live part in a disconnectable, insulating moulded case, eight 9 mm modules wide, with sealable transparent cover; c horizontal or vertical flush or surface mounting on a symmetrical rail; c connection by tunnel terminals for wire sizes: v 1.5 mm2 for terminals 1 to 6; v 2.5 mm2 for terminals 7 to 14. fault contacts number contact type alarm contact rating max. consumption auxiliary power supply operating range number contact type 380/415 V AC p.f. = 0.7 220/240 V AC p.f. = 0.7 220 V DC L/R = 0 s 120 V DC L/R = 0 s 48 V DC L/R = 0 s 24 V DC L/R = 0 s 48 to 240 V CA and 48 to 300 V DC 380 to 480 V CA AC DC changeover changeover mechanical characteristics weight (kg) thermoplastic case degree of protection disconnectable front panel case mounting other characteristics temperature range operating (as per IEC 755) storage environmental conditions tropicalisation toroids toroids to be used toroid-relay connection (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 hours 3 months' storage (as per IEC 68-2-11). (2) Maximum lengths: see table, page 16. 12 Merlin Gerin 042585 044321 RH320A RH320AP RH328A 044322 044320 RH10AP 042587 042583 RH10A RH328AP frequency - 50/60/400 Hz - type TT, IT, TNS 1 : 30 mA or 300 mA - 300 mA or 1 A - 0 - 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 multiplier x 100 : 3 A to 25 A coefficient x 1000 : 30 A to 250 A 0 0, 50, 90, 140, 250, 350, 500, 1000. auto. set to half the auto. set to half the residual op. current residual op. current 200 ms 200 ms auto. set to half the residual op. current 200 ms electronic + indicator light + contact detection circuit local, and remote by disconnecting the auxiliary power supply by indicator light by indicator light with latching with latching by indicator light without latching 2 : 1 standard + 1 standard 2 : 1 standard + 1 fail-safe 1 fail-safe latched latched 0 3A 5A 0.45 A 0.65 A 2.5 A 10 A 4 VA 5 VA/3 W – 15 %/+ 10 % ± 20 % 1 fail-safe non-latched - - 0 3A 5A 0.45 A 0.65 A 2.5 A 10 A 4 VA 5 VA/3 W – 15 %/+ 10 % ± 20 % by indicator light without latching 1 standard 1 fail-safe non-latched - - by indicator light with latching 2 : 1 standard + 1 fail-safe latched or non-latched 0 3A 5A 0.45 A 0.65 A 2.5 A 10 A 4 VA 5 VA/3 W – 15 %/+ 10 % ± 20 % 0.4 kg horizontal and vertical IP 30 IP 20 0.4 kg horizontal and vertical IP 30 IP 20 0.4 kg horizontal and vertical IP 30 IP 20 – 5 °C to + 55 °C – 40 °C to + 70 °C type T2(1) – 5 °C to + 55 °C – 40 °C to + 70 °C type T2(1) – 5 °C to + 55 °C – 40 °C to + 70 °C type T2(1) type A, OA type A, OA by shielded wire(2) or toroid plugged into relay for TA30 and PA50 Merlin Gerin by indicator light with latching by indicator light without latching 1 standard 1 fail-safe non-latched - - type A, OA 13 Vigirex: functions and characteristics 051352 042589 042596 toroids closed toroids, type A split toroids, type OA closed toroids, type E for: Vigirex RH10A, RH10AP, H320A, RH320AP, RH328A, RH328AP for: Vigirex RH10A, RH10AP, H320A, RH320AP, RH328A, RH328AP for: Vigirex RH10E, RH240E, RH248E c closed toroids for new installations and extensions. c split toroids for renovations and extensions. c closed toroids for new installations and extensions. c detect the leakage current and transmit a proportional signal to the associated relay. c detect the leakage current and transmit a proportional signal to the associated relay. c detect the leakage current and transmit a proportional signal to the associated relay. c enclosed in an insulated casing; c mounting, 3 possibilities: v ∅ 30-50 for clipping onto Vigirex relay, v ∅ 30-50-80 on a symmetrical rail; v any diameter on plate and cables; c connection: v ∅ 30-50 plugged directly into Vigirex relay, v ∅ 30 to 200 by connectors for 0.22 mm2 wires min.; v ∅ 300 by 6.35 mm tab connectors. c enclosed in an insulated casing; c mounted on plate or cable. c enclosed in an insulated casing; c mounted on plate or cable. utilisation functions installation dimensions type A TA PA IA MA SA GA ∅ (mm) 30 50 80 120 200 300 type OA POA GOA ∅ (mm) 46 110 type E TE30 PE50 IE80 ME120 SE200 ∅ (mm) 30 (all settings) 50 (all settings) 80 (settings u 300 mA) 120 (settings u 300 mA) 200 (settings u 300 mA) electrical characteristics transformation ratio maximum permissible current: 1 kA continuous 2.5 kA/1 s - 30 kA/0.05 s 1/1000 1/1000 1/1000 c c c mechanical characteristics weights (kg) ∅ ∅ ∅ ∅ ∅ ∅ ∅ ∅ 30 50 80 120 200 300 46 110 0.120 0.200 0.420 0.590 1.320 2.230 other characteristics temperature range storage operating degree of protection 14 – 40 °C to + 70°C – 5 °C to + 55 °C IP 20 0.120 0.200 0.510 0.690 1.570 1.300 3.200 – 40 °C to + 70°C – 5 °C to + 55 °C IP 20 – 40 °C to + 70°C – 5 °C to + 55 °C IP 20 Merlin Gerin earth fault relays with separate toroids Vigirex 3/ installation and connection page relays 14 toroids 15 auxiliaries 16 15 Vigirex: installation and connection relays Key: aa: auxiliary power supply t : type A, AO, or E toroid depending on relay ut: RH10E, RH240E, RH248E ut: used for control of a switching device RH10A, RH320A, RH328A ut1, ut2: remote indication or control of a switching device ut1: standard changeover contact ut2: fail-safe contact RH10AP, RH320AP, RH328AP ut1: standard changeover contact for control of a switching device ut2: fail-safe alarm contact E18710 E18459 RH10E-RH240E-RH248E 1 2 3 4 5 N L1 L2 L3 ut 7 6 MERLIN GERIN vigirex RH240E reset test t 1 8 9 1 2 3 10 11 12 13 14 2 6 7 8 9 aa E18460 E18718 RH10A/AP-RH320A/AP-RH328A/AP 1 2 3 4 5 6 N L1 L2 L3 MERLIN GERIN vigirex RH328A E18710 on 7 8 t test 2 reset 7 8 6 9 10 11 12 13 14 aa ut1 ut2 RH10E-RH240E-RH248E RH10A/AP-RH320A/AP-RH328A/AP Mounted on symmetrical rail IP 20 Flush mounting IP 30 81 E26291 45 Surface mounting IP 20 E26290 E26292 1 5 9 10 11 12 13 14 2 Ø4,2 46 66 45 44 60 65,5 16 4 81 72 65 73,5 73 37,5 73,5 57 72 10,5 Merlin Gerin Vigirex: installation and connection toroids toroids 1 2 F H E Ø5 J E B ∅ B C D E F G H J 27 60 22 18 75 45 25 18 4 50 86 22 18 101 61 41 33 5 type TE30 PE50 K L 34 28 50 28 29 C 60 87 D 53 66 E 82 108 F 50 60 type A diam. 300 ∅ B type C D E F G H J K L IA80, IE80 80 122 26.5 35 150 80 55 40 126 65 44 MA120, ME120 120 164 26.5 35 190 80 55 40 166 65 44 37 274 120 90 60 255 104 46 type OA diam. 46 and 110 Ø5 E24294 B 31 45 SA200, SE200 196 256 29 Ø L type GA300 Toroid location c on all the cables (phases and neutral) of a feeder downstream of the switching device associated with the Vigirex; c for a TT system, if a toroid cannot be installed on a transformer output (busbars or cables in parallel): place a toroid on the transformer neutral-earth path. E12110 A, OA, E toroids associated with the Vigirex Line overcurrents due to motor starting or transformer switching may cause unnecessary tripping of residual current type relays. This can be avoided by a few very simple precautions with cumulative effects: c place the toroid on a straight section of cable; c centre the cable in the toroid; c use a toroid with a much larger diameter than the cable going through it 2 x dia (fig.1). For very severe operating conditions, the use of a mild steel sleeve placed around the cable inside the toroid considerably increases immunity. Recommended characteristics: c mild steel foil 0.1 mm thick to be wrapped several times around the cable inside the toroid (minimum thickness 1 mm); c inner diameter of the toroid > 1.4 x outer diameter of the cable bundle (fig. 2). N1 23 figure 1 PE E13856B E13856 A Key v these toroids can only be used with relays having I∆n residual operating currents greater than 300 mA; c no residual operating current restrictions. immunity to line overcurrents H N1 B Ø L H ∅ H L type ∅ H L B C 299 29 344 POA 46 68 148 57 38 GOA 110 68 224 76 44 toroid ∅ mm relays RH10E RH240E RH248E RH10A RH320A RH328A RH10AP RH320AP RH328AP Vigirex Merlin Gerin B C D E24293 ∅ 30 52 C D L 4 21 Ø C type TA30 PA50 K G J E D 8 5 L 2 FH K B G Ø 1 Ø5 3 16 F Ø type E diam. 30 and 50 E18722 2 Ø4,5 E18664 types A and E diam. 80 to 200 E24291 type A diam. 30 and 50 23 A, OA 30 to 300 E E 30 and 50 80 to 200 c c c v v v c c c c c c PE figure 2 17 Vigirex: installation and connection auxiliaries toroid-relay connection circuit resistance must not exceed 3 ohms; c shielded wires: available with 1 or 2 conductors in reels of 20 or 100 m; c cable size 0.22 mm2. 2 wire size (mm ) max. length (m) 0,22 18 0,75 60 1 80 1,5 125 2,5 200 c the maximum toroid-relays connection examples of type A mounting On plate, type A or E, diam. 30 to 200 042591 On rail, diam. 30 to 80 042593 044323 On Vigirex, diam. 30 or 50 18 042590 044324 042592 On cable, diam. 120 to 300 Merlin Gerin earth fault relays with separate toroids Vigirex 4/ complementary technical information page implementation of residual current devices 18 electrical systems 20 useful definitions 21 19 Vigirex: complementary technical information implementation of residual current devices (RCDs) The use of residual current devices is described below according to the type of electrical system (TT, TN or IT). Protection of sensitive locations against fire hazards must also be considered. For such locations, a residual current device with a residual operating current i 300 mA should be provided at the head of the feeder concerned. TT systems exposed conductive parts interconnected and connected to the same earthing electrode 1. Condition satisfied A single device at the head of the installation is sufficient to ensure protection against electric shock. Its residual operating current is selected according to the resistance of the earthing system. E26961 introduction HV/LV RCD 2. Condition not satisfied This is the case in particular in installations where the loads are far apart. It is essential to have: c one RCD per group of interconnected exposed conductive parts; c one RCD at the head of the installation, unless the head circuit breaker and the main circuit breakers are in the same switchboard or in switchboards located next to one another (or linked by a class II connection). E26962 RB HV/LV RA RCD RCD RA1 RB RCD RA2 Horizontal discrimination This technique consists of transferring the residual current protection from the head of the installation to the downstream feeders: in this case, power is cut only on the faulty feeder. It is not possible unless the head circuit breaker and the main circuit breakers are in the same switchboard or in switchboards located next to one another (or linked by a class II connection). E26963 improvement of operating conditions - implementation of discrimination between residual current devices HV/LV RCD Vertical discrimination Downstream of the head circuit breaker, the main circuit breakers are provided with RCDs. In this case, power is cut only on the faulty feeder, subject to compliance with the following rules: I∆nA > 2 x I∆nB, T no A > T brk B, I∆nA and I∆nB are the residual operating currents of RCDs A and B, T no A = non operating time of A, T brk B = total break time of B (including the time due to the switching device). 20 RA E26964 RB RCD A RCD B RCD Merlin Gerin 1. Condition not satisfied c substation earthing system not connected to exposed conductive parts: place an RCD at the head of the installation; c exposed conductive parts not interconnected: place an RCD on each group of exposed conductive parts. To be supplemented by an RCD at the head of the installation unless the head circuit breaker and the main circuit breakers are in the same switchboard or in switchboards located next to one another (or linked by a class II connection). Note: CIM is insulation monitoring device. E26965 exposed conductive parts interconnected and connected to the same earthing electrode, itself connected to the substation earthing system HV/LV RCD earthing path CIM RB E26966 IT systems RA RCD HV/LV RCD RCD CIM RB RA 1 RA 2 TN systems Safety against electric shock is ensured by the overcurrent protection. Residual current devices must be used in the following cases: c feeder with excessive cable length; c circuit supplying portable equipment (such as socket outlet circuits); c circuit where there is a risk of the protective conductor breaking. E26967 2. Condition satisfied Protection against electric shock in the event of a double fault is provided by the overcurrent protection. Residual current devices must be used in the following cases: c feeder with excessive cable length; c circuit supplying portable equipment (such as socket outlet circuits); c circuit where there is a risk of the protective conductor breaking. HV/LV TNC system TNS system L1 L2 L3 N PE RCD PE RB Merlin Gerin 21 Vigirex: complementary technical information electrical systems consequences of an insulation fault Reminder An insulation fault occurs when a live conductor - phase or neutral - comes in contact with an exposed conductive part (e.g. motor casing). An insulation fault between phase and earth causes a current flow which is limited in practice only by the earthing resistances Rn and RA. Hazardous voltages exist on the exposed conductive parts. The fault current is a few amperes. E26968 TT systems HV/380V Consequences The consequences depend upon the type of electrical system (TT, IT or TN) used in the installation or part of installation concerned. Such faults create hazards to life and property. L1 L2 L3 N Tripping is essential. In the example opposite, with the following values for RA and Rn. RA = 20 Ω ; Rn = 10 Ω. The fault current is 7.3 (220 V/30 ohms) and the voltage Ud on the exposed conductive parts is 147 V. Ud Rn : 10Ω RA : 20Ω E26969 IT systems HV/380V L1 L2 L3 PE B Zct Id A Uc E26970 Rn HV/380V Id L1 L2 L3 PE 50 m 50 mm2 Zct 30 m 25 mm2 Uc Rn Ra E26971 TN systems HV/380V L1 L2 L3 PEN RnA 22 The fault current depends on the insulation impedance (Zct) of the installation in normal operation. As this impedance is high by its nature, the fault current is relatively low. The same is true for the voltage on the exposed conductive parts. Tripping is unnecessary. The fault must be reported, located and eliminated. 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 two simultaneously accessible exposed conductive parts depends on the resistance RAB of link AB. In an extreme case where RAB = 2 ohms, Uc = 2 x 0.062 = 0.124 V. If a second fault occurs before the first fault has been cleared, it rapidly becomes a short circuit between phases (or between phase and neutral), with the following consequences: c the exposed conductive parts carry a high voltage; c the fault current is equal to the short-circuit current. Tripping is essential. The initial voltage on the busbar supplying the two feeders must be estimated at 80 percent of the nominal voltage between phases. As the loop impedance is 99 milliohms (neglecting the reactances), the fault current is equal to 3070 A (380 x 0.8/0.099). The touch voltage Uc is equal to half the initial voltage, i.e.: 0.8 x 380/2 = 152 V. An insulation fault results in a short-circuit between phase and neutral. The resulting current flow is high. The exposed conductive parts are at a hazardous voltage. Tripping is essential. The initial voltage on the faulty feeder must be estimated at 80 percent of the nominal voltage between phase and neutral. The touch voltage Uc is equal to half 0.8 x 220 V, i.e. 88 V. Uc Merlin Gerin Vigirex: complementary technical information useful definitions The definitions below are intended for practical purposes only and do not claim to be exhaustive or theoretical. Direct contact Contact of persons with the normally live parts of electrical equipment. Discrimination Coordination of the automatic switching devices such that only the faulty part of the installation is cut off by opening of the device located immediately upstream of the fault. Double insulation insulation including both: c basic insulation required for protection against direct contact, and c supplementary insulation required for protection against indirect contact in case of a fault of the basic insulation. Exposed conductive part Any accessible metal part of an electrical equipment item other than the live parts and which can accidentally become live. Fault (electrical) Accidental connection between two points at different potentials, such as an insulation fault. A fault may be solid or may exhibit a certain impedance. A solid fault between live conductors is a short circuit. A distinction is made between phaseexposed conductive parts, phase-earth, phase-phase, phase-neutral, neutralexposed conductive parts and neutral-earth faults. Fault voltage Voltage, in case of an insulation fault, across an exposed conductive part and an earthing reference, i.e. a point on which the voltage is not modified when the exposed conductive part becomes live. Indirect contact Contact of persons with exposed conductive parts accidentally live due to an insulation fault. Insulation voltage Preferred term: rated insulation voltage. The rated insulation voltage of an assembly is the voltage characterising it and used as reference for the dielectric tests, the isolating distances and the creepage distance. Live conductor Conductor used for transmission of electrical power during normal operation (including the neutral conductor). PEN conductor In a TNC system, acts both as neutral conductor and as protective conductor (size u 10 mm2). The presence of switchgear on such conductors is prohibited. Merlin Gerin Protective conductor PE Conductor used for protection against indirect contact and for interconnecting exposed conductive parts: c to one another; c to extraneous conductive parts; c to earthing electrodes or earthed parts. The presence of switchgear on such conductors is prohibited. Residual current Root-mean-square vector sum of the currents flowing through all the live conductors. It is equal to zero in the absence of an insulation fault. In case of an insulation fault, the residual current is the leakage current returned to the source through the earth and the protective conductor. For the value of I∆n, see residual operating current. Touch voltage Voltage in case of an insulation fault across simultaneously accessible parts. Uc = f(t) safety curve Uc = f(t) is the maximum voltage that the human body can withstand for a given period of time, depending on external conditions (nature of the premises, presence of water, etc. - see NF C 15-100, Sec. 481.1.1, table 48A). Residual current device (RCD) A device that opens the associated switchgear when it detects a residual current above its residual operating current I∆n (see residual current). Residual operating current (I∆n) Value of the residual current which causes a residual current device to operate. Service voltage Preferred term: rated operating voltage. The rated operating voltage Ue of a system is the voltage which, together with the rated current of the system, determines the load. For three-phase systems, it is the voltage between phases. Shock protection device This device must automatically separate from the source any part of the installation on which there is a fault hazardous to life. Depending on the system earthing arrangement of the installation, this device is either a residual current device (characterised by I∆n, its residual operating current, and its total break time) or an overcurrent device (fuse or circuit breaker). break time Total time from fault detection to complete arc extinction. Time delay Intentional delay before operation of a device. The time delay on operation of an upstream circuit breaker allows time discrimination with the downstream circuit breaker. The time delay, which is voluntary, should not be confused with the break time of a device which is intrinsic to the device. 23 24 Merlin Gerin earth fault relays with separate toroids Vigirex 5/ catalogue numbers page earth fault relays accessories and toroids 25 Vigirex: price list earth leakage relays with separate toroids earth leakage relay RH10E 1 5 4 3 2 protection against direct and indirect contact + fire network sensitivity time delay single phase auxiliary power supply (V) 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 7 6 MERLIN GERIN vigirex RH10E reset test 300mA inst. 50622 8 10 11 12 13 14 9 BT 50/60 Hz 0.03 or 0.3 A 0s i∆n = 30 mA 50450 . i∆n = 300 mA 50453 . 50449 50451 50621 . . . 50452 50454 50623 . . . 50456 . 50455 50457 50628 . . . 50459 . 50458 50460 50633 . . . earth leakage relay RH240E 5 4 3 2 1 7 6 MERLIN GERIN vigirex RH240E reset test x100 x10 100 125 30 250 150 75 200 50 x1 50632 mA 10 11 12 13 14 9 8 protection against direct and indirect contact + fire network sensitivity time delay single phase auxiliary power supply (V) 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz BT 50/60 Hz 0.03 to 25 A 0s earth leakage relay RH248E 5 4 3 2 1 7 6 MERLIN GERIN vigirex RH248E reset test x100 x10 100 125 30 250 75 50 x1 50632 350 90 200 50 500 inst. 1000 mS 10 11 12 13 14 9 8 250 140 150 mA protection against direct and indirect contact + fire + motor network sensitivity time delay single phase auxiliary power supply (V) 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz BT 50/60 Hz 0.03 to 25 A 0 to 1 s earth leakage relay RH10A 1 2 3 4 5 6 MERLIN GERIN vigirex on RH10A test reset 50637 8 7 9 10 11 12 13 14 protection against direct and indirect contact + fire network sensitivity time delay single phase auxiliary power supply (V) 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 440 to 480 V AC 50/60 Hz BT 50/60/400 Hz 0.03 to 0.3 A 0s i∆n = 30 mA 50733 . i∆n = 300 mA 50736 . 50732 50734 50638 50639 . . . . 50735 50737 50641 50642 . . . . 50739 . 50738 50740 50647 50648 . . . . earth leakage relay RH320A 1 2 3 4 5 6 MERLIN GERIN vigirex on RH320A x1 x10 x0,1 x100 test A 0,1 0,075 0,05 0,03 0,125 0,15 0,2 0,25 reset 50646 7 24 8 9 10 11 12 13 14 protection against direct and indirect contact + fire + earth conductor network BT 50/60/400 Hz sensitivity 0.03 to 250 A time delay 0s single phase auxiliary power supply (V) 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 440 to 480 V AC 50/60 Hz Merlin Gerin unit price (excl. VAT) in French francs earth leakage relay RH328A protection against direct and indirect contact + fire + earth conductor + motor network BT 50/60/400 Hz sensitivity 0.03 to 250 A time delay 0 to 1 s single phase auxiliary power supply (V) 1 2 3 4 5 6 MERLIN GERIN vigirex on RH328A x1 x10 x0,1 0,1 250 350 50 500 test 0,125 0,075 0,15 0,2 0,05 0,03 1s inst. x100 A mS 140 90 0,25 reset 50652 8 7 10 11 12 13 14 9 12 V DC 24 V DC 48 V AC 50/60 Hz 48 to 120 V DC 110 to 130 V AC 50/60 Hz 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 440 to 480 V AC 50/60 Hz 500 to 525 V AC 50/60 Hz standard latched relay + fail safe latched relay 50661 50662 50743 standard unlatched relay + fail safe unlatched relay . . . 50746 . 50742 50744 50653 50654 50655 . . . . . 50745 50747 50657 50658 50659 . . . . . i∆n = 300 mA 50663 50664 50665 . . . i∆n = 1 A 50666 50667 50668 . . . 50672 50673 50674 50675 . . . . unlatched relay 50683 50684 50685 50686 . . . . 50055 . earth leakage relay RH10AP 1 2 3 4 5 6 MERLIN GERIN vigirex on RH10AP test reset 50652 8 7 10 11 12 13 14 9 protection against indirect contact + fire network sensitivity time delay single phase auxiliary power supply (V) 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 440 to 480 V AC 50/60 Hz BT 50/60/400 Hz 0.3 or 1 A + warning 0s earth leakage relay RH320AP 1 2 3 4 5 6 MERLIN GERIN vigirex on RH320AP x1 x10 x0,1 x100 test A 0,1 0,125 0,075 0,15 0,2 0,05 0,03 0,25 reset 50652 8 7 10 11 12 13 14 9 protection against direct and indirect contact + fire + earth conductor network BT 50/60/400 Hz sensitivity 0.03 to 250 A + warning time delay 0s single phase auxiliary power supply (V) 220 to 240 V AC 50/60 Hz 380 to 415 V AC 50/60 Hz 440 to 480 V AC 50/60 Hz 500 to 525 V AC 50/60 Hz earth leakage relay RH328AP 1 2 3 4 5 6 MERLIN GERIN vigirex on RH328AP x1 x10 x0,1 0,1 250 350 50 500 inst. x100 test A mS 140 90 0,125 0,075 0,15 0,2 0,05 0,03 1s 0,25 reset 50652 8 7 10 11 12 13 14 9 protection against direct and indirect contact + fire + earth conductor + motor network BT 50/60/400 Hz sensitivity 0.03 to 250 A + warning time delay 0 to 1 s single phase auxiliary power supply (V) latched relay 220 to 240 V AC 50/60 Hz 50679 380 to 415 V AC 50/60 Hz 50680 440 to 480 V AC 50/60 Hz 50681 500 to 525 V AC 50/60 Hz 50682 . . . . earth leakage relay RH328AF protection against direct contact (30 mA) specific for command motor by Telemecanique ATV66 variable speed controller single phase auxiliary power supply (V) 220 to 240 V AC 50/60 Hz 1 2 3 4 5 6 MERLIN GERIN vigirex on RH328A x1 x10 x0,1 250 1s 350 50 x100 test A mS 140 inst. 90 500 0,1 0,075 0,05 0,03 0,125 0,15 0,2 0,25 reset 50652 7 8 9 10 11 12 13 14 Merlin Gerin 25 Vigirex: price list earth leakage relays with separate toroids unit price (excl. VAT) in french francs accessories and toroids toroid-relay link toroids for RH10A/AP RH320A/AP - RH328A/AP toroids for RH10E RH240E - RH248E 26 screened cable (cable size 0.22 mm2) roll of 20 m roll of 100 m closed toroid, type A type TA PA IA MA SA GA opening toroid, type OA type POA GOA closed toroid, type E type TE30 PE50 IE80 ME120 SE200 1 conductor 50157 50158 2 conductors 50137 50136 . . Ø (mm) 30 50 80 120 200 300 50437 50438 50439 50440 50441 50442 . . . . . . Ø (mm) 46 110 50485 50486 . . Ø (mm) 30 50 80 120 200 50430 50431 50432 50433 50434 . . . . . . . Merlin Gerin 000000000 © 1999 Schneider Electric - All right reserved Schneider Electric Industries SA 5, rue Nadar 92506 Rueil-Malmaison Cedex France Tel : +33 (0)1 41 29 82 00 Fax : +33 (0)1 47 51 80 20 As standards, specifications and designs change from time to time, please ask for confirmation of the information given iin this publication ce document a étéhas imprimé This document been printed on ecological paper sur du papier écologique. http://www.schneiderelectric.com Design: Schneider Electric - AMEG Photo: Schneider Electric Printed: BTP207E 09-99