Smart earth leakage protection - Circutor
Smart earth leakage protection - Circutor Smart earth leakage protection - Circutor
Industrial earth leakage protectionParameters related to self-reclosing relaysRelay status indicatorThe indications are associated to thetype of protection, distinguishing betweeninstantaneous triggers and interlockings.The indications are sent by therelay (LED) and, optionally, by auxiliarycontacts.Another type of visualisation, dependingon the relay, is the instantaneous triggervalue and the number of total reclosures.Nominal trigger point of protectionsStandard values:}}Earth leakage protection 30 mA - 3 A}}Overload protection 6 A - 63 ATimer (delay)Minimum time that the earth leakagemust last before setting off a relay trigger.Standard values: 20 ms - 1s.Relay power supply and toleranceSelf-reclosing relays need a permanentform of auxiliary power supply in order tomanage the self-reclosing operations.}}Standardised value: 230 Vac ± 15 %}}Optional: 48, 110 or 400 VacReclosing meter reset time.To avoid the accumulation of triggers thatdo not correspond to the same anomaly,a reset time is defined for the reclosingmeters, provided that the maximumnumber of reclosures is not exceeded.Example: The WRU-25 RA relay has amaximum number of reclosures availablebefore being pushed to its interlocking.ON position. This is when the reset timerof the reclosing meter will be set off.The RESET option starts the relay, resettingthe reclosing meters.Local (with the keys) and remotetest and resetSelf-reclosing earth leakage relays offerthe same performance as non-reclosingrelays. It enables the verification of thecorrect operation of the relay with localTEST and RESET functions, using thekeys on the relay, including remote functionswith specific inputs.The RESET option resets the relay andthe reclosing meters.Number of reclosures, distinguishedby type and number ofself-reclosingEach relay enables a maximum numberof reclosures before setting off theinterlocking. The meter will be reset automaticallyif the maximum number ofreclosures is not exceeded within a preestablishedperiod of time (reset time ofreclosing meters).This number will be different, in accordancewith the type of self-reclosing.Output relay}}Number of relays}}With interlocking}}NO or NC Output contactTime between reclosuresTime the relay takes between the triggerand the self-reclosing. It can be linear orexponential.In installations with a transient earth leakagefault that lasts 50 seconds, the relayis triggered 4 times and reclosed 3 times(8 s + 16 s + 30 s). During the timing ofthe third self-reclosing, the fault disappears,so that the relay will remain in theP1-10
Industrial earth leakage protectionSeriesWGCEarth leakage transformres WGC SeriesDescriptionFeaturesThis new range presents a series of improvements above all in theinstallation of equipment in switchboards.Along with the usual installation fixtures, we add the possibility ofdoing it with a DIN rail by means of an accessory, which would facilitateits installation.The WGC series earth leakage transformers have a greater immunityto transitory type current peaks that usually cause differentialprotection triggers.The earth leakage transformers of the WGC Series have been designedto work with the relays of the WGC Series. The sensitivity (trigger current)of the transformer-relay set is established by the associated relay.Electrical insulationSafety IEC 60664-1 / IEC 60664-3Maximum assigned service Voltage 720 VAssigned Impulse Voltage / pollution 3 kV / IIIMeasurement circuitAssigned transformation ratio, Kn 30 / 0,06 AAccuracy in measurement 10 ... 15%Direct thermal current60 AShort-circuit thermal current, Ith 1,8 kA / 1 segDynamic current, Idyn2.5 IthOperating conditionsOperating temperature-20 ºC ... +70º CRelative humidity 95%Maximum altitude2000 mMechanical featuresTerminal protection IP20 (IEC 60529)Screw down fasteners M-5DIN rail (with accessory)See code belowCasing material / color Lexan 923 / RAL 7035Self-extinguishing classUL94V-0Product standards IEC 60044-1ConnectionTwo wire (S1-S2) connection typeDimensions of rigid/flexible conductorsScrew down fasteners(screw typw pzl0,1 a 2,5 mm2 / 27 ... 12 AWGConnection to the protection and measurement devices (RCD, RCM)Cabling with wire section ≥ 1 mm2Cabling of braidedand shielded wiresection ≥ 1 mm20 ... 1 m0 ... 10 mP1-11
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Industrial <strong>earth</strong> <strong>leakage</strong> <strong>protection</strong>SeriesWGCEarth <strong>leakage</strong> transformres WGC SeriesDescriptionFeaturesThis new range presents a series of improvements above all in theinstallation of equipment in switchboards.Along with the usual installation fixtures, we add the possibility ofdoing it with a DIN rail by means of an accessory, which would facilitateits installation.The WGC series <strong>earth</strong> <strong>leakage</strong> transformers have a greater immunityto transitory type current peaks that usually cause differential<strong>protection</strong> triggers.The <strong>earth</strong> <strong>leakage</strong> transformers of the WGC Series have been designedto work with the relays of the WGC Series. The sensitivity (trigger current)of the transformer-relay set is established by the associated relay.Electrical insulationSafety IEC 60664-1 / IEC 60664-3Maximum assigned service Voltage 720 VAssigned Impulse Voltage / pollution 3 kV / IIIMeasurement circuitAssigned transformation ratio, Kn 30 / 0,06 AAccuracy in measurement 10 ... 15%Direct thermal current60 AShort-circuit thermal current, Ith 1,8 kA / 1 segDynamic current, Idyn2.5 IthOperating conditionsOperating temperature-20 ºC ... +70º CRelative humidity 95%Maximum altitude2000 mMechanical featuresTerminal <strong>protection</strong> IP20 (IEC 60529)Screw down fasteners M-5DIN rail (with accessory)See code belowCasing material / color Lexan 923 / RAL 7035Self-extinguishing classUL94V-0Product standards IEC 60044-1ConnectionTwo wire (S1-S2) connection typeDimensions of rigid/flexible conductorsScrew down fasteners(screw typw pzl0,1 a 2,5 mm2 / 27 ... 12 AWGConnection to the <strong>protection</strong> and measurement devices (RCD, RCM)Cabling with wire section ≥ 1 mm2Cabling of braidedand shielded wiresection ≥ 1 mm20 ... 1 m0 ... 10 mP1-11
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