Smart earth leakage protection - Circutor

Industrial earth leakage protectionDefinitionWhen the earth leakage protection systemdetects a fault current, it acts on theelectrical installation being protected,opening the circuit while interruptingthe supply of electrical energy, thus preventingthe danger of electrocution forpersons when the fault current reachesdangerous values, either as a result ofdirect or indirect contact, including anypotential damage caused to goods andmaterials.An earth leakage protection system iscomposed of three clearly different parts:}}Detecting element or sensor}}Relay}}Circuit breakerceived by the sensor and either sendsthe trigger signal to the associated circuitbreaker or not, depending on thesensitivity and delay time values programmed.Circuit breaker: This element acts asthe current interrupting element. It canbe a circuit breaker (with trigger coil), acontact, etc.These three elements can be found inCIRCUTOR's products with differentconfigurations:}}All elements separately}}Relay with internal transformerDetecting element or sensor: Currenttransformer that detects the earthleakage current of active conductors inan installation, sending a proportionalsignal to the relay. It can have a toroidalor rectangular geometry, depending onthe arrangement of plates or the wiringof the installation location.The correct operation of the sensor requiresthe path of capacitors to be asperfectly aligned as possible.Relay: Smart protection element. Itmeasures and treats the signal re-Immunised earth leakage protectionNowadays, "sympathy" or unwantedtriggers are quite common in modern installations.In these cases, one or moreearth leakage switches are triggered simultaneously,protecting an installationfrom the leakage currents sent to earthas a result of capacitive effects causedby the installation.Said capacitive effects can explained bytwo reasons:}}The installation's cables cause earthingcondensation effects. The longer thecable, the greater the capacity effect}}The capacitors of EMI filters in theequipment with electronic power regulationThe different loads or consumption of aninstallation can be classified in two maingroups, depending on the type of insulationfrom earth:Loads with no earthed capacitorsThe insulation existing between the unitand the earthing elements can be representedwith a pure Ohmic resistance.If the resistance is not high enough, nocurrent will pass through the earthingelements. The leakage current is zero(current passing to earth under normalconditions).In case there is an insulation fault, currentwill pass through earthing elements,the so-called fault earthed current, I d.P1-4

Industrial earth leakage protectionMeasurement in TRMS and Class AThe voltage and current wave shapeshave stopped being complete sinewaves since the loads distributed in theinstallations are not linear. The continuousand harmonic components can distortthe wave shapes, whereby it will benecessary to take more accurate measurements.The current range of electronic earthleakage switches measures the rootmean-square-value(TRMS) of leakagecurrents by sampling it.The wave shapes in installations withlinear resistive loads are pure sinewaves.However, the figure shows howthe mean value will not work to measurethe root-mean-square-value with accuracywhen it stops being a completesine-wave.In accordance with these problems,the IEC 61008-1 Earth Leakage SwitchStandard determines the types of operation,depending on the type of wave.Two types are defined, Class AC andClass A.CLASS ACThe earth leakage devices used in domesticinstallations or that protect loadsthat do not cause distortions can be ofthe AC Type. These devices are markedwith a symbol, in compliancewith the IEC 61008-1Standard.CLASS AIn the presence of non-linear receivers,Type A earth leakage protection systemsmust be used, which means thatrectified currents can be measured witha continuous component of up to 6 mA,including non-distorted currents (ACtype), marked by the correspondingIEC 61008-1Standard.Immunity against transient leakagesThe IEC 61008-1 Standard defines twotypes of ray-type curves to check thecorrect operation of an earth leakagedevice: an overload and an overvoltagewave. The overload wave shows theeffects caused in the measurement ofthe earth leakage device and the overvoltagewave shows the effects in thepower supply.The behaviour of earth leakage protectionunits in the case of transientoverloads and overvoltages is vital tomaintain the continuity in the supply ofelectricity. Therefore, the immunisedearth leakage protection relays manufacturedby CIRCUTOR can supportvery high peaks.Current: Curve 8 / 20 µs: ≈ 5 kAVoltage: Curve 1.2 / 50 μs: ≈ 4 kVP1-6

Industrial earth leakage protectionHigh-frequency currentThe IEC 479-1 / UNE 20-572-92 Standarddescribes the effects of currentspassing through the human body fora frequency of 50 Hz. As you can see,the effect depends on the root-meansquare-valueof the current passingthrough the body and the time it takesto pass through. In accordance with theeffects, we can establish zones 1 (zonewith no perception) and 2 (perceptionzone) as safe work zones. Therefore, interms of the protection of persons, earthleakage protection systems must act onthose zones.previous graph, which indicates that thecurrent is less dangerous.See the tableattached, in accordance with IEC 479-2/ UNE 20-572-93, where a fault currentof, for example, 45 mA at 500 Hz has thesame effect as a fault current of 30 mAat 50 Hz. In the case of receivers withEMI filters, we can consider that theseinject a high-frequency earthed current(>2 kHz) and a low frequency current.The use of type A earth leakage protectionsystems is specified in these cases.Frequency factor F fFrequency fWhen the frequency increases, thecurves are displaced to the right of thea. Perception thresholdb. "No-drop" thresholdc1 / c2 / c3. Fibrilation thresholdDelay time1. No perception2. Perception3. Reversible effects. Muscle tetany4. Potentially irreversible effectsSensitivityAdjustments of I ∆n100 % I ∆nThe IEC 61008-1 Standard specifiesthat earth leakage switches must betriggered when the fault earthed currentis between 50% and 100% of the sensitivityvalue (I ∆n) selected. This meansthat the values that exceed 50% canset off the earth leakage switch trigger.This type of case is common withelectromechanical switches. In the caseof electrical energy installations, thesehave evolved in such a way that the adjustmentof protection can cause greatproblems, since it is too low. The electronicearth leakage protection systemsoffered by CIRCUTOR determine thetrigger near 100 % of I ∆n.Therefore, we have a lower risk of triggersand less interruptions in the installation'ssupply than when the fault currentis lower than I ∆n.The following graphs show that with anidentical evolution of the fault earthedcurrent in the same installation, the behaviourof the earth leakage switch isdifferent, even when the sensitivity levelof I ∆nis the same in both cases.This adjustment of I ∆nallows us to concentratemore loads that incorporateearthed capacitors within the same linebeing protected. For example, in a computerinstallation: Each unit diverts acurrent, I leakage, of 2 mA through the EMIfilter capacitors included. At a sensitivityof (I ∆n) 30 mA, you can install 7 computerswith the electromechanical earthleakage switches. However, if you useCIRCUTOR's electronic switches youcan install a total of 12.Fault earthed current I dFault earthed current I d50 % I ∆nTime, t100 % I ∆n85 % I ∆nTime, tP1-7

Industrial earth leakage protectionInverse curvetI dI ∆nThe IEC 61008-1 Standard allows us toincorporate a circuit opening delay forthe circuit being protected, which willdepend on the leakage current level.Therefore, the greater the fault current,the lower the delay.Two types of curves are specified, asshown on the following table of values:}}Instantaneous}}SelectiveThe application of these curves to ourearth leakage systems can be used toincrease the continuity in the installation'spower supply and avoid unwantedtrips.Standardised operating time values (s)Type Instantaneous SelectiveI ∆n(A) All values > 0,03I ∆n0,3 0,52 . I ∆n0,15 0,25 . I ∆n0,04 0,15500 A 0,04 0,15MaximumMonitoring protection elementsThe leakage current value must beavailable at all times in many applications.This information is quite useful forthe installation's preventive and correctivemaintenance tasks, since we canact before triggers are set off.For example, if the insulation degree ofa machine is reduced, the earth leakagecurrent increases, and since we havethe said information, we can implementthe appropriate corrective actions toavoid the trigger from being set off.The idea is to integrate the earth leakagecurrents in the installation's energycontrol system, thus controlling an additionalquantity.Depending on the type of product, theinformation can be presented as follows:}}In the earth leakage relay, throughthe display.}}Through the RS-485 communicationssystem.}}With an auxiliary measurement unit.In addition, records and logs of the insulationbehaviour of the installation canbe taken.Remote control and resetIn the case of earth leakage protectionsystems in installations that require acontinuous supply of energy, with nomaintenance staff present, the remotecontrol and reset (or self-reclosing)functions are very useful.Remote control functions can be carriedout through communications systems(RS-485, Ethernet, etc.), using the PowerStudioScada software. This functioncan control the status of protection systemsand perform a set of actions througha computer and communications systems.P1-8

Industrial earth leakage protectionEarth leakage protection systems with self-reclosingGiven the current efficient personal andmaterial protection requirements andobligations, and the complexity of someinstallations that require the continuoussupply of electrical energy with the useof overload and earth leakage protectionsystems, CIRCUTOR has developed awide range of units that make safety andservice continuity compatible.Self-reclosing systems are an ideal solutionfor installations that need a constantsupply of electrical energy, without theneed for the usual maintenance staff:}}Rural installations}}Refrigeration chambers}}Public lighting}}Mobile telephony repeaters}}Traffic lights}}Lighting of tunnels}}ATMs}}Cable television}}Etc.The type of protection element installed,those that can be reclosed and underwhich reclosing conditions must be knownby all self-reclosing systems.Self-reclosing systems act in accordancewith the following:}}Earth leakage current (earth leakage)}}Earth leakage current (earth leakage) +overload and short-circuit (circuit breaker).Elements that form an self-reclosing systemTRANSFORMERRELAYTreatment of the signal,measurement and triggerCIRCUIT BREAKERmonitoredEarth leakage transformerCircuit breakerThe earth leakage transformer detectsthe earth leakage. It can be built-in on arelay or as an external element.Self-reclosing relaySelf-reclosing relays add a series ofperformance features (self-reclosing,thermal or overload protection) to theproven reliability and security of non-reclosingearth leakage protection relays.It performs the following functions:}}Detection of anomalies (earth leakageor overload) through the signal generatedby the transducer.}}They analyse the anomaly to see if itmust generate an alarm, depending onthe parameters programmed.}}They also act on power elements,which perform the grid load connectiondisconnectiontasks.The circuit breaker always interrupts theflow of power, which supports the powerin the line protected and is an externalelement of the relay.The circuit breakers that can be associatedto self-reclosing relays are asfollows:}}Motorized circuit breaker (MT)}}Contact circuit breaker with remotecontrol (MCB), with a dual circuit breakerand contact function (the function ofthe contact is bistable).Features of the circuit breaker:}}Nominal current (in contacts)}}Nominal current and thermal protectioncurve (in circuit breakers)}}Features of the control inputs of theoperational element}}Circuit-breaking power}}Auxiliary NO or NC signalling of thecircuit breaker's statusP1-9

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

Industrial earth leakage protectionWG SeriesWGCEarth leakage transformres WGC SeriesReferencesUseful diameter(mm)Weight(g) I n(A) Type Code25 Ø 80 acc. relay WGC 25 P1015135 Ø 120 acc. relay WGC 35 P1015255 Ø 160 acc. relay WGC 55 P1015380 Ø 300 acc. relay WGC 80 P10154110 Ø 420 acc. relay WGC 110 P10155140 Ø 760 acc. relay WGC 140 P10156220 x 105 3740 acc. relay WGC-220x105 P10158350 x 150 7800 acc. relay WGC-350x150 P10159500 x 200 11300 acc. relay WGC-500x200 P10160DIN rail mounting accessory for WG-35 up toWG-210, and WGC-25, WGC-35 and WGC-55PA-TC/WGP19921(mm)EDimensionsAD(mm)A/2 A/2BCFGHKIJType A B C DWGC 25 25 60,5 64 -WGC 35 35 70,5 75,5 -WGC 55 55 92 98 38WGC 80 80 124,5 130 60WGC 110 110 163 168 84,5WGC 140 140 201 206 110Type WGC-220x105 WGC-350x150 WGC-500x200A 200 340 460B 7 7 7C 35 30 40D 54,2 50,2 306E 195 279 64F 314 479 614G 275 430 550H 220 350 500I 105 165 180J 102 143 155K 105 150 200P1-12

Industrial earth leakage protectionWG SeriesWGWG Series Earth Leakage transformersDescriptionThe earth leakage transformers of the WG Series have been designedto work with the relays of the WG Series. The sensitivity (trigger current)of the transformer-relay set is established by the associated relay.ReferencesWG DimensionsUseful diameter(mm)Weight(g) I n(A) Type Code20 Ø 76 acc. relay WGS-20 P1013130 Ø 95 acc. relay WGS-30 P1013235 Ø 181 acc. relay WG-35 P1011170 Ø 274 acc. relay WG-70 P10112105 Ø 545 acc. relay WG-105 P10113140 Ø 1 222 acc. relay WG-140 P10114210 Ø 2 040 acc. relay WG-210 P1011570 x 175 2 400 acc. relay WG-70x175 P10116115 x 305 5 450 acc. relay WG-115x305 P10117150 x 350 7 400 acc. relay WG-150x350 P10118Type A B C D EWG-35 100 79 26 48,5 35WG-70 130 110 32 66 70WG-105 170 146 38 94 105WG-140 220 196 48,5 123 140WG-210 299 284 69 161 210200 x 500 13 400 acc. relay WG-200x500 P10119WGS DimensionsWGS-20WGS-30Type A B C D E F G H IWG-70X175 70 175 225 85 22 46 261 176 7,5WG-115X305 115 305 360 116 25 55 402 240 8WG-150X350 150 350 415 140 28 55 460 285 8Type A B C D E F G H IWG-200X500 200 500 - 140 - 62 585 285 -P1-13

Industrial earth leakage protectionWG SeriesRG1MElectronic earth leakage relay with externaltransformer of the WG / WGC SeriesDescriptionFeaturesWG series electronic differential protectionrelay for connection to external WG / WGS /WGC series toroidal transformers}}These are highly reliable electronic relayswith the option of a fixed or adjustable sensitivityand delay}}Measurement using true root mean square(TRMS) value}}DIN 46277 (En50022) Rail mounting}}Reduced one module size.}}LED status indication.• yPower ON LED.• yLeakage led ON. Tripped relay.• yPower LED flashing and leakage LEDON. Detection of a transformer continuityfaultApplicationThe RG1M relays combined with the WG /WGC transformer provides complete differentialprotection, both on single-phase andthree-phase lines.ProtecciónClassMeasurementSensitivityDelayEarth leakage transformerTest and ResetRemote ControlAssociated circuit breakerLED indicatorCircuit breaker controlA superimmunizedTrue root mean square (TRMS)30 or 300 mA20 msExternal WG / WGC SeriesWith built-in buttons, T & RExternal Test OptionContactor or automatic circuit breaker using a coiltrigger• Power supply voltage• Leakage trigger• Disconnection of external transformerThrough a NO/NC switched relay, dependingon the connection with the circuit breakerFeaturesAuxiliary power supply230 Vac (± 20 %) 50 / 60 HzOutput contacts250 Vac, 6 AOperating temperature -10 ... +65 ºCConstruction featuresFixing DIN Rail 46277 (EN 50022)Dimensions1 moduleWeight85 gDegree of protectionIP 20 terminalsStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008P1-14

64 mm90 mmIndustrial earth leakage protectionWG SeriesRG1MElectronic earth leakage relay with externaltransformer of the WG SeriesDimensions45 mm66 mm72 mm 17.5 mm‏ReferencesSize Attachment I n(A) Delay Type Code1 modules DIN rail 0.03 0.02 s RG1M-0.03 P122041 modules DIN rail 0.3 0.02 s RG1M-0.3 P12214Connections50/60 Hz230 V±20%L1 L2 L3 N50/60 Hz230 V±20%L1 L2 L3 N7 87 85 6RG1M1S11S2Type WG5 6RG1M1S11S2Type WGTest / Reset230V;5ATest / Reset230V;5A3 41 2Disparo por BOBINA DE MÍNIMA- Rearme manual.CARGA3 41 2CARGADisparo por BOBINA DE EMISIÓN- Rearme manual.P1-15

Industrial earth leakage protectionWG SeriesRGE / RGE-RElectronic earth leakage relay with externaltransformer of the WG / WGC SeriesDescriptionFeaturesElectronic earth leakage protection relay,used to connect to the earth leakage transformersWG / WGC Series}}These electronic relays offer a high reliability,with the option of a fixed or adjustablesensitivity and delay}}Type A relay with high frequency currentfiltering and high immunity. Monitoring of thetrue root mean square (TRMS)}}Assembly on DIN rail 46277}}Reduced size: 2 modules}}LED indicators:• yPermanently lit leak indicator• yLED: Trigger relay• yFlashing power LED and lit leak LED:detection of faults in the transformer's continuity• yFlashing leak LED indicator (only RGE-Rand RGE-R1): Leak with a value under thevalue selected• y1 flash every 2 s: 25 ... 50 % of the leakagecurrent• y1 flash every 1 s: 50 ... 75 %• y2 flashes every 1 s: 75 ...

Industrial earth leakage protectionWG SeriesRGE / RGE-RElectronic earth leakage relay with externaltransformer of the WG SeriesDimensionsReferencesSize Fixing I n(A) Delay Type Code2 modules DIN rail 0,03 0.02 s RGE-0.03 P122012 modules DIN rail 0,3 0.02 s RGE-0.3 P122112 modules DIN rail 0,03 ... 3 0.02 ... 1 s RGE-R1 P122312 modules DIN rail 0,03 ... 5 0.02 ... 5 s RGE-R P12232ConnectionsShunt coil trippingUndervoltage coil trippingEXTERNAL RESETEXTERNAL RESETEXTERNAL RESETEXTERNAL RESETSHUNTCOILSHUNTCOILUNDERVOLTAGECOILUNDERVOLTAGECOILLOADLOADLOADLOADP1-17

Industrial earth leakage protectionWG SeriesRGU-10 / RGU-10 CElectronic earth leakage relay with externaltransformer of the WG / WGC SeriesDescriptionFeaturesElectronic earth leakage protection relay,used to connect to the earth leakage transformersWG / WGC Series}}Superimmunized Type A relay with highfrequency current filtering and high immunity}}Monitoring of the true root mean square(TRMS)}}Display of data on the screenTwo independentprogrammable outputs (main andpre-alarm)}}External input for remote control functions( 230 Vac).ApplicationThe RGU-10 relays associated to the transformersof the WG / WGC series allow ansmart earth leakage protection. Their designfeatures guarantee maximum security andcontinuity of the electrical service, avoidingunwanted tripping.Showing the value of the leak instantaneouslyon the display with the pre-alarm indicationsprovides the information about thestate of lines being protected, thus allowingthe implementation of an adequate preventivemaintenance approach.In addition, version RGU-10 C with RS-485communications is used with the Power Studiosoftware, which allows the centralisedsupervision of the system in real time, with arecord log that can be analysed later on.ProtectionClassMeasurementSensitivityDelayEarth leakage transformerTest and ResetRemote ControlAssociated circuit breakerLED indicatorDisplay ViewRemote signalingCircuit breaker controlFeaturesAuxiliary power supplyOutput contactsA superimmunizedTrue root mean square (TRMS)0.03 ... 3 A0.03 ... 30 A(PROGRAMMING)Time defined: 0,02 ... 10 sInverse curve: Instantaneous or selectiveExternal, TRANSFORMERS WG / WGCWith built-in buttons, T & RExternal Test OptionContact or Circuit breaker + trigger coil• Power supply voltage• Trip due to leakage• Disconnection of the external transformer• Pre-alarm• Current trip (red display when triggered)• Programming parameters• Instantaneous leakage current• Disconnection of the external transformer• Pre-alarm• Display of parameters with RS-485communications (RGU-10 C)Through an NO/NC switched relay, dependingon the connection with the circuit breaker230 Vac (± 20 %) 50 / 60 Hz(other values on demand)250 Vac, 6 AOperating temperature -10 ... +50 ºCConstruction featuresFixing DIN Rail 46277 (EN 50022)Dimensions3 modulesWeight236 gDegree of protectionIP 20 Terminals, IP 41 back panelStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008P1-18

Industrial earth leakage protectionWG SeriesRGU-10 / RGU-10 CElectronic earth leakage relay with externaltransformer of the WG / WGC SeriesDimensionsReferencesSize Communications I n(A) Delay Type Code3 modules -3 modules RS-4850.03 ... 3 A0.03 ... 30 A(PROGRAMMING)0.03 ... 3 A0.03 ... 30 A(PROGRAMMING)0.02...10 s, INS, SEL RGU-10 P119410.02...10 s, INS, SEL RGU-10 C P11944ConnectionsShunt coilUndervoltage coilP1-19

Industrial earth leakage protectionWG SeriesCBS-4 / CBS-4 CEarth leakage monitoring and signaling unitof the external transformer of the WG / WGCSeriesDescriptionFeatures}}Unit equivalent to 4 earth leakage protectionnetworks. 4 independent programmablerelays available}}Four inputs to connect the external toroidaltransformers of the WG}}Superimmunized Type A relay with highfrequency current filtering and high immunity.Monitoring in true root mean square (TRMS)}}Reduced size, with 3 modules}}5 independent programmable outputs(4 earth leakage trip relays and 1 pre-alarmtrip).ApplicationThe CBS-4 earth leakage unit associated tothe transformers of the WG / WGC Series allowsan smart earth leakage protection. Itsdesign features guarantee maximum securityand continuity of the electrical service, avoidingunwanted tripping.Showing the value of the leak instantaneouslyon the display with the pre-alarm indicationsprovides the information about thestate of lines being protected, thus allowingthe implementation of an adequate preventivemaintenance approach.ProtectionNo. of protectionsClassMeasurementSensitivityDelayEarth leakage transformerTest and ResetAssociated circuit breakerLED indicatorDisplay View4 Independent linesA superimmunizedTrue root mean square (TRMS)0.03 A ... 30 ATime defined: 0,02 ... 10 sInverse curve: instantaneous or selectiveExternal, TRANSFORMERS WG/WGPWith built-in buttons, T & RContact or Circuit breaker + trigger coil• Power supply voltage• Leakage trip• Pre-alarm• Interlocked earth leakage self-reclosing• Current trip (red display when triggered)• Instantaneous leak level indicator in each channel• Parameter programming• State of the self-reclosing- Disconnected externaltrans. indicator- Automatic self-reclosing enabledFeaturesAuxiliary power supply230 Vac (± 20 %) 50 ... 60 HzOutput contacts250 Vac, 5 AOperating temperature -10 ... +50 ºCConstruction featuresFixing DIN Rail 46277 (EN 50022)Dimensions3 modulesWeight236 gDegree of protectionIP 20 Terminals, IP 41 back panelStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008In addition, version CBS-4 C with RS-485communications is used with the PowerStudiosoftware, which allows the centralisedsupervision of the system in real time, witha record log that can be analysed later on.P1-20

Industrial earth leakage protectionWG SeriesCBS-4 / CBS-4 CEarth leakage monitoring and signaling unitof the external transformer of the WG / WGCSeriesDimensionsReferencesSize Communications No. of Relays I n(A) Type Code3 modules - 4 0.03 ... 30 s CBS-4 P127113 modules RS-485 4 0.03 ... 30 s CBS-4 C P12712ConnectionsP1-21

Industrial earth leakage protectionWG SeriesCBS-8Earth leakage monitoring and signaling unitof the external transformer of the WG / WGPSeriesDescriptionFeatures}}Unit equivalent to 8 earth leakage protectionnetworks. 8 independent programmablerelays available}}8 inputs to connect the external toroidaltransformers of the WG / WGP}}Superimmunized Type A relay with highfrequency current filtering and high immunity.Monitoring in true root mean square (TRMS)}}Size adapted for 8 modules}}9 independent programmable outputs(8 earth leakage trip relays and 1 pre-alarmtrip).ApplicationThe CBS-8 earth leakage station associatedto the transformers of the WG / WGP Seriesallows an smart earth leakage protection. Itsdesign features guarantee maximum securityand continuity of the electrical service, avoidingunwanted tripping.Showing the value of the leak instantaneouslyon the display with the pre-alarm indicationsprovides the information about thestate of lines being protected, thus allowingthe implementation of an adequate preventivemaintenance approach.In addition, RS-485 communications areused with the Power Studio software, whichallows the centralised supervision of the systemin real time, with a record log that can beanalysed later on.ProtectionNo. of protectionsClassMeasurementSensitivityDelayEarth leakage transformerTest and ResetAssociated circuit breaker8 Independent linesA superimmunizedTrue root mean square (TRMS)0.03 A ... 6.3 A external transformers WG / WGS0.03 A ... 63 A external transformers WGP/WGSPTime defined: 0,02 ... 10 sInverse curve: instantaneous or selectiveExternal, TRANSFORMERS WG / WGPWith built-in buttons, T & RContact or Circuit breaker + trigger coilSelf-reclosingNo. of reclosures 0 Programming option ... 10Time between reclosures0 Programming option ... 900 sPartial counter reset timeDouble the reclosing time• Power supply voltage• Leakage tripLED indicator• Pre-alarm• Interlocked earth leakage reclosing• Automatic self-reclosing enabled• Instantaneous leak level indicator in each channelDisplay View• Parameter programming• Self-reclosing statusFeaturesAuxiliary power supply230 Vac (± 20 %) 50 ... 60 HzOutput contacts250 Vac, 5 AOperating temperature -10 ... +50 ºCConstruction featuresFixing DIN Rail 46277 (EN 50022)Dimensions8 modulesWeight609 gDegree of protectionIP 20 Terminals, IP 41 back panelStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008P1-22

Industrial earth leakage protectionWG SeriesCBS-8Earth leakage monitoring and signaling unitof the external transformer of the WG / WGPSeriesDimensions11045140 70CBS-8ReferencesSize Communications No. of Relays I n(A) Type Code8 modules RS-485 8 0.03 ... 63 A CBS-8 (*) P12811(*) In the case of the 0.3 ... 63 A scale, use earth leakage transformers of the WGP / WGSPConnectionsP1-23

Industrial earth leakage protectionWG SeriesWGPEarth leakage Transformers of the WGPSeries (only for CBS-8)DescriptionThe earth leakage transformers of the WGP Series have been designedto work only with the CBS-8 relay unit and a sensitivity of 0.3 ...63 A. These transformers have a 1/5000 ratio.ReferencesWGP DimensionsUseful diameter(mm) Weight (g) I n(A) Type Code20 Ø 76 0,3 ... 63 WGSP-20 P1014130 Ø 95 0,3 ... 63 WGSP-30 P1014235 Ø 181 0,3 ... 63 WGP-35 P1012170 Ø 274 0,3 ... 63 WGP-70 P10122105 Ø 545 0,3 ... 63 WGP-105 P10123140 Ø 1 222 0,3 ... 63 WGP-140 P10124210 Ø 2 040 0,3 ... 63 WGP-210 P1012570 x 175 2 400 0,3 ... 63 WGP-70x175 P10126115 x 305 5 450 0,3 ... 63 WGP-115x305 P10127150 x 350 7 400 0,3 ... 63 WGP-150x350 P10128WGSP DimensionsType A B C D EWGP-35 100 79 26 48,5 35WGP-70 130 110 32 66 70WGP-105 170 146 38 94 105WGP-140 220 196 48,5 123 140WGP-210 299 284 69 161 210WGSP-20WGSP-30Type A B C D E F G H IWGP-70X175 70 175 225 85 22 46 261 176 7,5WGP-115X305 115 305 360 116 25 55 402 240 8WGP-150X350 150 350 415 140 28 55 460 285 8P1-24

Industrial earth leakage protectionWRU-10Differential relay with built-in transformerand displayDescriptionFeaturesElectronic differential protection relay with builtin28 mm transformer, constituting one unit.}}Type A high-insulation, with high-frequencycurrent filter and high insulation. Monitoringusing true root mean square.}}Display with LEDs and display:- differential protection settings.- protection trigger current.- protection status messages, etc.}}Units with three programmable output contactrelays, one switched and two simple. Themain relay is for the protection provided by thecontact or trigger relay of the automatic switchwhile the two others are for the pre-alarm.}}It also has a voltage input for external triggeringand re-arming.}}Assembly on DIN Rail 46277 (EN 50022)}}Reduced three-module size.}}Connection by pluggable terminals.ApplicationWRU-10 relays allow for intelligent differentialprotection. Due to their design features, theyassure maximum safety and continuity in electricalservice, avoiding unwanted tripping..Information on the state of the protected linesis made available through the visualization ofthe instantaneous leakage value on the displayscreen together with prealarm signals, allowingfor effective preventive maintenance.ProtectionClassMeasurementSensitivity PROGRAMABLEDelay PROGRAMABLETest y ResetRemote ControlAssociated circuit breakerLED indicatorCircuit breaker controlA superimmunizedTrue root mean square (TRMS)0,03 ... 3 A, scalable up to 30 A by SETUPTime defined: 0,02 ...1 s, scalable up to 10s by SETUP.Inverse curve: Instantaneous or selective (IEC 60947-2)With built-in buttons, T & RExternal Test Option, voltage-free input tripping.Contact or Circuit breaker + trigger coil• Power supply voltage• Trip due to leakage• Pre-alarm- Protection parameters- Leakage current/trip reading- Leakage current/trip reading.-TEST statuses and externaltripping.Through an NO/NC switched relay, dependingon the connection with the circuit breakerElectric featuresAuxiliary power supply230 Vac (± 30 %) 50 / 60 HzOutput contacts250 Vac, 5 A / 230 Vac, 250 mAOperating temperature -20 ...+70 ºCConstruction featuresFixing DIN Rail 46722 (EN 50022)Dimensions3 modulesWeight275 gDegree of protectionIP 20, IP 41 back panelStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008P1-25

Industrial earth leakage protectionWGBUTransformer with built-in earth leakage relayDescriptionFeaturesThe WGBU Series is a compact earth leakageprotection system. It is composed of atoroidal transformer with a built-in earth leakagerelay.}}Multi-range electronic relay• yThe sensitivity can be adjusted to 0.03 ... 3 A• yTrigger delay of 0.02 ... 1 ws, adjustable}}Type A relay with high frequency currentfiltering and high immunity. Monitoring in trueroot mean square (TRMS).}}LED indicators:• yGrid connection LED• yPre-alarm and trigger LED: 1 flash every2 s, leak between 25 and 50 % of the sensitivityselected; 1 flash every 1 s, leak between50 and 75 % of the sensitivity selected;1 flash every 0.5 s, leak exceeding 75% of the sensitivity selected; permanentlylit, trigger of the earth leakage protection.ApplicationThe WGBU series offers a reliable earthleakage protection, with simpler cabling andsavings in the assembly time. In addition, installationis very simple, thanks to its compactdimensions.Earth leakageClassMeasurementSensitivityDelayEarth leakage transformerTest and ResetAssociated circuit breakerLED indicatorRemote Control (inputs)Circuit breaker controlProtectionA superimmunizedTrue root mean square (TRMS)0.03 ... 3 A0.02 ... 1 sBuilt-in transformers of the WGWith built-in buttons, T & RContact or Circuit breaker + trigger coil• Power supply voltage• Trip due to leakage• Pre-alarmExternal Test OptionThrough an NO/NC switched relay, dependingon the connection with the circuit breakerFeaturesAuxiliary power supply230 Vac (± 20 %) 50 / 60 HzOutput contacts250 Vac, 6 AOperating temperature -10 ... +50 ºCConstruction featuresFixingDIN Panel / RailDimensionsDepending on the typeWeightDepending on the typeDegree of protectionIP 20 Terminals, IP 41 back panelStandardsIEC 60947-2, IEC 60755, IEC 62020, IEC 61008P1-27

Industrial earth leakage protectionWGBUTransformer with built-in earth leakage relayDimensionsWGBUWGBU-90Type A1 A2 B C D EWGBU-35 (A1) / WGBU-90-35 (A2) 166 100 79 26 48,5 35WGBU-70 (A1) / WGBU-90-70 (A2) 196 130 110 332 66 70WGBU-105 (A1) / WGBU-90-105 (A2) 236 170 146 38 94 105WGBU-140 (A1) / WGBU-90-140 (A2) 286 220 196 48,5 123 140WGBU-210 (A1) / WGBU-90-210 (A2) 365 299 284 69 161 210ReferencesWeight (g)Useful diameter(mm) I n(A) Delay (s) Type Code380 35 Ø 0,03 ... 3 0,02 ... 1 WGBU-35 P16011474 70 Ø 0,03 ... 3 0,02 ... 1 WGBU-70 P16012744 105 Ø 0,03 ... 3 0,02 ... 1 WGBU-105 P160131422 140 Ø 0,03 ... 3 0,02 ... 1 WGBU-140 P160142240 210 Ø 0,03 ... 3 0,02 ... 1 WGBU-210 P16015380 35 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-35 P16021474 70 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-70 P16022744 105 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-105 P160231422 140 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-140 P160242240 210 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-210 P16025The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A.P1-28

Industrial earth leakage protectionWGBUTransformer with built-in earth leakage relayConnectionsShunt coilUndervoltage coilP1-29

Industrial earth leakage protectionWRN-22Earth leakage relay with built-in transformerDescriptionFeaturesThe WRN-22 relay is an earth leakage relaywith a built-in earth leakage transformer, witha diameter Ø 22 mm}}DIN 46277 Symmetrical profile coupling(EN 50022)}}The leakage is detected by means ofsampling the earth leakage intensity and calculatingits true root mean square (TRMS)}}Detection of the presence of voltage withLEDs}}TEST button.ApplicationThe WRN-22 earth leakage protection is avery interesting solution for small-scale installationswith reduced space.ProtectionClassMeasurementSensitivityDelayEarth leakage transformerTestAssociated circuit breakerRelay signalingATrue root mean square (TRMS)0,01 A / 0,03 A / 0,30 A (depending on the type)0.02 sInternalWith built-in button, TESTCircuit breaker + trigger coil• Power supply voltage• Leakage triggerRemote signaling (outputs) -Remote Control (inputs)External testCircuit breaker controlVoltage 230 VacFeaturesAuxiliary power supply230 Vac (± 20 %) 50 / 60 HzOutput contacts -Operating temperature -10 ... +50 ºCConstruction featuresFixingDIN railDimensions3 modulesWeight146 gDegree of protectionIP 20 Terminals, IP 41 back panelStandardsIEC 1008, IEC 255-5, UNE 801-2, UNE 801-3, UNE 801-4, UNE 60730-1P1-30

Industrial earth leakage protectionWRN-22Earth leakage relay with built-in transformerDimensionsReferencesSizeUseful diameter(mm) I n(A) Delay (s) Type Code3 modules 22 0,03 0,02 WRN-22-0.03 P142113 modules 22 0,3 0,02 WRN-22-0.3 P142123 modules 22 0,01 0,02 WRN-22-0.01 P14214ConnectionsP1-31

Smart earth leakage protection+ information: central@circutor.eswww.circutor.comDesigned by Communication Dept. - CIRCUTOR, SACIRCUTOR, SA - Vial Sant Jordi, s/n08232 Viladecavalls (Barcelona) SpainTel. (+34) 93 745 29 00 - Fax: (+34) 93 745 29 14central@circutor.esCIRCUTOR, SA reserves the right to change any of the information contained in this catalogue.