Smart earth leakage protection

Transcription

1 NEW ZEALAND Unit 6/22 Moselle Ave, Henderson, Auckland, New Zealand PO Box , Henderson, Auckland, New Zealand Phone: info@LPINZ.co.nz Web: Smart earth leakage protection

2 Smart earth leakage protection Contenido WGC Earth leakage transformres WGC Series P1-13 WG WG Series Earth Leakage transformers P1-14 RG1M Electronic earth leakage relay with external transformer of the WG / WGC Series P1-15 RGE / RGE-R Electronic earth leakage relay with external transformer of the WG / WGC Series P1-17 RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG / WGC Series P1-19 CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG / WGC Series P1-21 CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP Series P1-23 WGP Earth leakage Transformers of the WGP Series (only for CBS-8) P1-25 WRU-10 Relé diferencial con transformador incorporado con display (tipo A) P1-26 WRU Earth leakage relay with built-in transformer (type A) P1-28 WGBU Transformer with built-in earth leakage relay P1-30 WRN-22 Earth leakage relay with built-in transformer P1-33 P1-2

3 Smart earth leakage protection The "protection" and "continuity" of the electrical power supply are two terms that must not be separated if we wish to guarantee the safety of users and electrical installations. The recent addition of receivers or loads that generate distortion in the electricity grid (speed variators, electronic startup units, computer equipment, lighting with electronic ballasts, etc.) has made necessary the use of protection systems that can distinguish between defects in the installation and the electrical alterations that cause the unwanted tripping of protection systems. The new range of earth leakage protection products offers state-of-the-art performance to guarantee the continuity and safety requirements: 4 earth leakage protection methods Monitoring in true root mean square. High frequency filtering Inverse curve delay (instantaneous and selective) Adjustment of the nominal sensitivity trigger Display of the fault current (monitoring of protection systems) Monitoring the status of protections allows us to do the following in the electrical installation: Analyse the insulation conditions. Preventive and corrective maintenance. Reduce production downtime. Decrease maintenance costs. Quick location of faults. P. 1 /2 SAFETY OF PERSONS AND MATERIALS SAFETY OF PERSONS AND MATERIALS CONTINUITY ELECTRICAL POWER SUPPLY Immunised protection Monitoring Remote control Reset Immunised protection P1-3

4 Definition When the earth leakage protection system detects a fault current, it acts on the electrical installation being protected, opening the circuit while interrupting the supply of electrical energy, thus preventing the danger of electrocution for persons when the fault current reaches dangerous values, either as a result of direct or indirect contact, including any potential damage caused to goods and materials. An earth leakage protection system is composed of three clearly different parts: Detecting element or sensor Relay Circuit breaker ceived by the sensor and either sends the trigger signal to the associated circuit breaker or not, depending on the sensitivity and delay time values programmed. Circuit breaker: This element acts as the current interrupting element. It can be a circuit breaker (with trigger coil), a contact, etc. These three elements can be found in CIRCUTOR's products with different configurations: All elements separately Relay with internal transformer Detecting element or sensor: Current transformer that detects the earth leakage current of active conductors in an installation, sending a proportional signal to the relay. It can have a toroidal or rectangular geometry, depending on the arrangement of plates or the wiring of the installation location. The correct operation of the sensor requires the path of capacitors to be as perfectly aligned as possible. Relay: Smart protection element. It measures and treats the signal re- Immunised earth leakage protection Nowadays, "sympathy" or unwanted triggers are quite common in modern installations. In these cases, one or more earth leakage switches are triggered simultaneously, protecting an installation from the leakage currents sent to earth as a result of capacitive effects caused by the installation. Said capacitive effects can explained by two reasons: The installation's cables cause earthing condensation effects. The longer the cable, the greater the capacity effect The capacitors of EMI filters in the equipment with electronic power regulation The different loads or consumption of an installation can be classified in two main groups, depending on the type of insulation from earth: Loads with no earthed capacitors The insulation existing between the unit and the earthing elements can be represented with a pure Ohmic resistance. If the resistance is not high enough, no current will pass through the earthing elements. The leakage current is zero (current passing to earth under normal conditions). In case there is an insulation fault, current will pass through earthing elements, the so-called fault earthed current, I d. P1-4

5 In this case, we must simply adjust the sensitivity and delay time to guarantee the adequate protection. Loads with earthed capacitors The current passes through the earthing elements as a result of the unit's operations through its capacitors. In addition, the length of cables in an electrical installation can lead to capacitive earthing faults, which would lead to this situation. The current can be injected with two methods: Permanent Leakages. The unit injects current in the earthing elements permanently. This type of behaviour is closely tied to the use of EMI filters, which are installed in most machines or loads with electronic power regulation, in order to comply with the electromagnetic compatibility directives. This type of filter prevents the high frequency distortion generated by the receiver from being returned to the grid. However, it is transferred through the earthing capacitors. It also transfers indirectly the fundamental frequency and its corresponding harmonics, so that the leakage is usually a set of overlapping high and low frequency signals. Therefore, it increases the risk of an earth leakage trip with no real earth leakage current. Transient Leakages. It has the same capacitive effects of cables and the filters mentioned above for transient overvoltages caused by grid switching effects, the connection-disconnection of circuits or effects that are simply caused by atmospheric agents. In case of loads with earthed capacitors, the basic problem for the protection of the system is to distinguish which earthed current is part of the unit's operation and which is part of an insulation defect. Electromechanical earth leakage relays do not usually solve these situations. The immunised earth leakage protection offered by CIRCUTOR has evolved in relation to five factors, in order to satisfy the needs of our customers, catering for the current demand as regards the safety and continuity of the supply of electricity: MEASUREMENT IN TRUE ROOT MEAN SQUARE (TRMS) AND CLASS A IMMUNE TO TRANSIENT LEAKAGES HIGH FREQUENCY FILTERING ADJUSTMENT OF THE TRIGGER OF I n INVERSE CURVE P1-5

6 Measurement in TRMS and Class A The voltage and current wave shapes have stopped being complete sine waves since the loads distributed in the installations are not linear. The continuous and harmonic components can distort the wave shapes, whereby it will be necessary to take more accurate measurements. The current range of electronic earth leakage switches measures the rootmean-square-value (TRMS) of leakage currents by sampling it. The wave shapes in installations with linear resistive loads are pure sinewaves. However, the figure shows how the mean value will not work to measure the root-mean-square-value with accuracy when it stops being a complete sine-wave. In accordance with these problems, the IEC Earth Leakage Switch Standard determines the types of operation, depending on the type of wave. Two types are defined, Class AC and Class A. CLASS AC The earth leakage devices used in domestic installations or that protect loads that do not cause distortions can be of the AC Type. These devices are marked with a symbol, in compliance with the IEC Standard. CLASS A In the presence of non-linear receivers, Type A earth leakage protection systems must be used, which means that rectified currents can be measured with a continuous component of up to 6 ma, including non-distorted currents (AC type), marked by the corresponding IEC Standard. Immunity against transient leakages The IEC Standard defines two types of ray-type curves to check the correct operation of an earth leakage device: an overload and an overvoltage wave. The overload wave shows the effects caused in the measurement of the earth leakage device and the overvoltage wave shows the effects in the power supply. The behaviour of earth leakage protection units in the case of transient overloads and overvoltages is vital to maintain the continuity in the supply of electricity. Therefore, the immunised earth leakage protection relays manufactured by CIRCUTOR can support very high peaks. Current: Curve 8 / 20 µs: 5 ka Voltage: Curve 1.2 / 50 μs: 4 kv P1-6

7 High-frequency current The IEC / UNE Standard describes the effects of currents passing through the human body for a frequency of 50 Hz. As you can see, the effect depends on the root-meansquare-value of the current passing through the body and the time it takes to pass through. In accordance with the effects, we can establish zones 1 (zone with no perception) and 2 (perception zone) as safe work zones. Therefore, in terms of the protection of persons, earth leakage protection systems must act on those zones. previous graph, which indicates that the current is less dangerous.see the table attached, in accordance with IEC 479-2/ UNE , where a fault current of, for example, 45 ma at 500 Hz has the same effect as a fault current of 30 ma at 50 Hz. In the case of receivers with EMI filters, we can consider that these inject a high-frequency earthed current (>2 khz) and a low frequency current. The use of type A earth leakage protection systems is specified in these cases. Frequency factor F f Frequency f When the frequency increases, the curves are displaced to the right of the a. Perception threshold b. "No-drop" threshold c1 / c2 / c3. Fibrilation threshold Delay time 1. No perception 2. Perception 3. Reversible effects. Muscle tetany 4. Potentially irreversible effects Sensitivity Adjustments of I n 100 % I n The IEC Standard specifies that earth leakage switches must be triggered when the fault earthed current is between 50% and 100% of the sensitivity value (I n ) selected. This means that the values that exceed 50% can set off the earth leakage switch trigger. This type of case is common with electromechanical switches. In the case of electrical energy installations, these have evolved in such a way that the adjustment of protection can cause great problems, since it is too low. The electronic earth leakage protection systems offered by CIRCUTOR determine the trigger near 100 % of I n. Therefore, we have a lower risk of triggers and less interruptions in the installation's supply than when the fault current is lower than I n. The following graphs show that with an identical evolution of the fault earthed current in the same installation, the behaviour of the earth leakage switch is different, even when the sensitivity level of I n is the same in both cases. This adjustment of I n allows us to concentrate more loads that incorporate earthed capacitors within the same line being protected. For example, in a computer installation: Each unit diverts a current, I leakage, of 2 ma through the EMI filter capacitors included. At a sensitivity of (I n ) 30 ma, you can install 7 computers with the electromechanical earth leakage switches. However, if you use CIRCUTOR's electronic switches you can install a total of 12. Fault earthed current I d Fault earthed current I d 50 % I n Time, t 100 % I n 85 % I n Time, t P1-7

8 Inverse curve t I d I n The IEC Standard allows us to incorporate a circuit opening delay for the circuit being protected, which will depend on the leakage current level. Therefore, the greater the fault current, the lower the delay. Two types of curves are specified, as shown on the following table of values: Instantaneous Selective The application of these curves to our earth leakage systems can be used to increase the continuity in the installation's power supply and avoid unwanted trips. Standardised operating time values (s) Type Instantaneous Selective I n (A) All values > 0,03 I n 0,3 0,5 2. I n 0,15 0,2 5. I n 0,04 0, A 0,04 0,15 Maximum Monitoring protection elements The leakage current value must be available at all times in many applications. This information is quite useful for the installation's preventive and corrective maintenance tasks, since we can act before triggers are set off. For example, if the insulation degree of a machine is reduced, the earth leakage current increases, and since we have the said information, we can implement the appropriate corrective actions to avoid the trigger from being set off. The idea is to integrate the earth leakage currents in the installation's energy control system, thus controlling an additional quantity. Depending on the type of product, the information can be presented as follows: In the earth leakage relay, through the display. Through the RS-485 communications system. With an auxiliary measurement unit. In addition, records and logs of the insulation behaviour of the installation can be taken. Remote control and reset In the case of earth leakage protection systems in installations that require a continuous supply of energy, with no maintenance staff present, the remote control and reset (or self-reclosing) functions are very useful. Remote control functions can be carried out through communications systems (RS-485, Ethernet, etc.), using the PowerStudio Scada software. This function can control the status of protection systems and perform a set of actions through a computer and communications systems. P1-8

9 Earth leakage protection systems with self-reclosing Given the current efficient personal and material protection requirements and obligations, and the complexity of some installations that require the continuous supply of electrical energy with the use of overload and earth leakage protection systems, CIRCUTOR has developed a wide range of units that make safety and service continuity compatible. Self-reclosing systems are an ideal solution for installations that need a constant supply of electrical energy, without the need 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 under which reclosing conditions must be known by all self-reclosing systems. Self-reclosing systems act in accordance with the following: Earth leakage current (earth leakage) Earth leakage current (earth leakage) + overload and short-circuit (circuit breaker). Elements that form an self-reclosing system TRANSFORMER RELAY Treatment of the signal, measurement and trigger CIRCUIT BREAKER monitored Earth leakage transformer Circuit breaker The earth leakage transformer detects the earth leakage. It can be built-in on a relay or as an external element. Self-reclosing relay Self-reclosing relays add a series of performance features (self-reclosing, thermal or overload protection) to the proven reliability and security of non-reclosing earth leakage protection relays. It performs the following functions: Detection of anomalies (earth leakage or overload) through the signal generated by the transducer. They analyse the anomaly to see if it must generate an alarm, depending on the parameters programmed. They also act on power elements, which perform the grid load connectiondisconnection tasks. The circuit breaker always interrupts the flow of power, which supports the power in the line protected and is an external element of the relay. The circuit breakers that can be associated to self-reclosing relays are as follows: Motorized circuit breaker (MT) Contact circuit breaker with remote control (MCB), with a dual circuit breaker and contact function (the function of the contact is bistable). Features of the circuit breaker: Nominal current (in contacts) Nominal current and thermal protection curve (in circuit breakers) Features of the control inputs of the operational element Circuit-breaking power Auxiliary NO or NC signalling of the circuit breaker's status P1-9

10 Parameters related to self-reclosing relays Relay status indicator The indications are associated to the type of protection, distinguishing between instantaneous triggers and interlockings. The indications are sent by the relay (LED) and, optionally, by auxiliary contacts. Another type of visualisation, depending on the relay, is the instantaneous trigger value and the number of total reclosures. Nominal trigger point of protections Standard values: Earth leakage protection 30 ma - 3 A Overload protection 6 A - 63 A Timer (delay) Minimum time that the earth leakage must last before setting off a relay trigger. Standard values: 20 ms - 1s. Relay power supply and tolerance Self-reclosing relays need a permanent form of auxiliary power supply in order to manage the self-reclosing operations. Standardised value: 230 Vac ± 15 % Optional: 48, 110 or 400 Vac Reclosing meter reset time. To avoid the accumulation of triggers that do not correspond to the same anomaly, a reset time is defined for the reclosing meters, provided that the maximum number of reclosures is not exceeded. Example: The WRU-25 RA relay has a maximum number of reclosures available before being pushed to its interlocking. ON position. This is when the reset timer of the reclosing meter will be set off. The RESET option starts the relay, resetting the reclosing meters. Local (with the keys) and remote test and reset Self-reclosing earth leakage relays offer the same performance as non-reclosing relays. It enables the verification of the correct operation of the relay with local TEST and RESET functions, using the keys on the relay, including remote functions with specific inputs. The RESET option resets the relay and the reclosing meters. Number of reclosures, distinguished by type and number of self-reclosing Each relay enables a maximum number of reclosures before setting off the interlocking. The meter will be reset automatically if the maximum number of reclosures is not exceeded within a preestablished period of time (reset time of reclosing meters). This number will be different, in accordance with the type of self-reclosing. Output relay Number of relays With interlocking NO or NC Output contact Time between reclosures Time the relay takes between the trigger and the self-reclosing. It can be linear or exponential. In installations with a transient earth leakage fault that lasts 50 seconds, the relay is triggered 4 times and reclosed 3 times (8 s + 16 s + 30 s). During the timing of the third self-reclosing, the fault disappears, so that the relay will remain in the P1-10

11 Series WGC Earth leakage transformres WGC Series Description Features This new range presents a series of improvements above all in the installation of equipment in switchboards. Along with the usual installation fixtures, we add the possibility of doing it with a DIN rail by means of an accessory, which would facilitate its installation. The WGC series earth leakage transformers have a greater immunity to transitory type current peaks that usually cause differential protection triggers. The earth leakage transformers of the WGC Series have been designed to work with the relays of the WGC Series. The sensitivity (trigger current) of the transformer-relay set is established by the associated relay. Electrical insulation Safety IEC / IEC Maximum assigned service Voltage 720 V Assigned Impulse Voltage / pollution 3 kv / III Measurement circuit Assigned transformation ratio, Kn 30 / 0,06 A Accuracy in measurement % Direct thermal current 60 A Short-circuit thermal current, Ith 1,8 ka / 1 seg Dynamic current, Idyn 2.5 Ith Operating conditions Operating temperature -20 ºC º C Relative humidity 95% Maximum altitude 2000 m Mechanical features Terminal protection IP20 (IEC 60529) Screw down fasteners M-5 DIN rail (with accessory) See code below Casing material / color Lexan 923 / RAL 7035 Self-extinguishing class UL94V-0 Product standards IEC Connection Two wire (S1-S2) connection type of rigid/flexible conductors Screw down fasteners (screw typw pzl 0,1 a 2,5 mm2 / AWG Connection to the protection and measurement devices (RCD, RCM) Cabling with wire section 1 mm2 Cabling of braided and shielded wire section 1 mm m m P1-11

12 WG Series WGC Earth leakage transformres WGC Series References Useful diameter (mm) Weight (g) I n (A) Type Code 25 Ø 80 acc. relay WGC 25 P Ø 120 acc. relay WGC 35 P Ø 160 acc. relay WGC 55 P Ø 300 acc. relay WGC 80 P Ø 420 acc. relay WGC 110 P Ø 760 acc. relay WGC 140 P x acc. relay WGC-220x105 P x acc. relay WGC-350x150 P x acc. relay WGC-500x200 P10160 DIN rail mounting accessory for WG-35 up to WG-210, and WGC-25, WGC-35 and WGC-55 PA-TC/WG P19921 (mm) E A D (mm) A/2 A/2 B C F G H K I J Type A B C D WGC , WGC ,5 75,5 - WGC WGC , WGC ,5 WGC Type WGC-220x105 WGC-350x150 WGC-500x200 A B C D 54,2 50,2 306 E F G H I J K P1-12

13 WG Series WG WG Series Earth Leakage transformers Description The earth leakage transformers of the WG Series have been designed to work with the relays of the WG Series. The sensitivity (trigger current) of the transformer-relay set is established by the associated relay. References WG Useful diameter (mm) Weight (g) I n (A) Type Code 20 Ø 76 acc. relay WGS-20 P Ø 95 acc. relay WGS-30 P Ø 181 acc. relay WG-35 P Ø 274 acc. relay WG-70 P Ø 545 acc. relay WG-105 P Ø acc. relay WG-140 P Ø acc. relay WG-210 P x acc. relay WG-70x175 P x acc. relay WG-115x305 P x acc. relay WG-150x350 P10118 Type A B C D E WG ,5 35 WG WG WG , WG x acc. relay WG-200x500 P10119 WGS WGS-20 WGS-30 Type A B C D E F G H I WG-70X ,5 WG-115X WG-150X Type A B C D E F G H I WG-200X P1-13

14 WG Series RG1M Electronic earth leakage relay with external transformer of the WG / WGC Series Description Features WG series electronic differential protection relay for connection to external WG / WGS / WGC series toroidal transformers These are highly reliable electronic relays with the option of a fixed or adjustable sensitivity and delay Measurement using true root mean square (TRMS) value DIN (En50022) Rail mounting Reduced one module size. LED status indication. ypower ON LED. yleakage led ON. Tripped relay. ypower LED flashing and leakage LED ON. Detection of a transformer continuity fault Application The RG1M relays combined with the WG / WGC transformer provides complete differential protection, both on single-phase and three-phase lines. Protección Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Remote Control Associated circuit breaker LED indicator Circuit breaker control A superimmunized True root mean square (TRMS) 30 or 300 ma 20 ms External WG / WGC Series With built-in buttons, T & R External Test Option Contactor or automatic circuit breaker using a coil trigger Power supply voltage Leakage trigger Disconnection of external transformer Through a NO/NC switched relay, depending on the connection with the circuit breaker Features Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz Output contacts 250 Vac, 6 A Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 1 module Weight 85 g Degree of protection IP 20 terminals Standards IEC , IEC 60755, IEC 62020, IEC P1-14

15 45 mm 64 mm 90 mm Industrial earth leakage protection WG Series RG1M Electronic earth leakage relay with external transformer of the WG Series 66 mm 72 mm 17.5 mm R eferences Size Attachment I n (A) Delay Type Code 1 modules DIN rail s RG1M-0.03 P modules DIN rail s RG1M-0.3 P12214 Connections 50/60 Hz 230 V±20% L1 L2 L3 N 50/60 Hz 230 V±20% L1 L2 L3 N RG1M 1S11S2 Type WG 5 6 RG1M 1S11S2 Type WG Test / Reset 230V;5A Test / Reset 230V;5A Disparo por BOBINA DE MÍNIMA - Rearme manual. CARGA CARGA Disparo por BOBINA DE EMISIÓN - Rearme manual. P1-15

16 WG Series RGE / RGE-R Electronic earth leakage relay with external transformer of the WG / WGC Series Description Features Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG / WGC Series These electronic relays offer a high reliability, with the option of a fixed or adjustable sensitivity and delay Type A relay with high frequency current filtering and high immunity. Monitoring of the true root mean square (TRMS) Assembly on DIN rail 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-R and RGE-R1): Leak with a value under the value selected y1 flash every 2 s: % of the leakage current y1 flash every 1 s: % y2 flashes every 1 s: <100 % ypermanently: 100 % Application Protection Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Remote Control Associated circuit breaker LED indicator Display View - Remote signaling - Circuit breaker control Features Auxiliary power supply Output contacts A superimmunized True root mean square (TRMS) 0.03 A / 0.3 A / 0.5 A / A (R1) / A (R) 0.02 / s (R1) / s (R) External, TRANSFORMERS WG / WGC With built-in buttons, T & R External Test Option Contact or Circuit breaker + trigger coil Power supply voltage Trip due to leakagedisconnection of the external transformerpre-alarm (R-R1) Through an NO/NC switched relay, depending on the connection with the circuit breaker 230 Vac (± 20 %) 50 / 60 Hz (other values on demand) 250 Vac, 6 A Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 2 modules Weight 163 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC The relays of the RGE series and the transformer of the WG / WGC series enable a full earth leakage protection for both single and three-phase lines. They guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. P1-16

17 WG Series RGE / RGE-R Electronic earth leakage relay with external transformer of the WG Series References Size Fixing I n (A) Delay Type Code 2 modules DIN rail 0, s RGE-0.03 P modules DIN rail 0, s RGE-0.3 P modules DIN rail 0, s RGE-R1 P modules DIN rail 0, s RGE-R P12232 Connections Shunt coil tripping Undervoltage coil tripping EXTERNAL RESET EXTERNAL RESET SHUNT COIL UNDERVOLTAGE COIL LOAD LOAD P1-17

18 WG Series RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG / WGC Series Description Features Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG / WGC Series Superimmunized Type A relay with high frequency current filtering and high immunity Monitoring of the true root mean square (TRMS) Display of data on the screentwo independent programmable outputs (main and pre-alarm) External input for remote control functions ( 230 Vac). Application The RGU-10 relays associated to the transformers of the WG / WGC series allow an smart earth leakage protection. Their design features guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. Showing the value of the leak instantaneously on the display with the pre-alarm indications provides the information about the state of lines being protected, thus allowing the implementation of an adequate preventive maintenance approach. In addition, version RGU-10 C with RS-485 communications is used with the Power Studio software, which allows the centralised supervision of the system in real time, with a record log that can be analysed later on. Protection Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Remote Control Associated circuit breaker LED indicator Display View Remote signaling Circuit breaker control Features Auxiliary power supply Output contacts A superimmunized True root mean square (TRMS) A A (PROGRAMMING) Time defined: 0, s Inverse curve: Instantaneous or selective External, TRANSFORMERS WG / WGC With built-in buttons, T & R External Test Option Contact 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-485 communications (RGU-10 C) Through an NO/NC switched relay, depending on the connection with the circuit breaker 230 Vac (± 20 %) 50 / 60 Hz (other values on demand) 250 Vac, 6 A Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 3 modules Weight 236 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC P1-18

19 WG Series RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG / WGC Series References Size Communications I n (A) Delay Type Code 3 modules - 3 modules RS A A (PROGRAMMING) A A (PROGRAMMING) s, INS, SEL RGU-10 P s, INS, SEL RGU-10 C P11944 Connections Shunt coil Undervoltage coil P1-19

20 WG Series CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG / WGC Series Description Features Unit equivalent to 4 earth leakage protection networks. 4 independent programmable relays available Four inputs to connect the external toroidal transformers of the WG Superimmunized Type A relay with high frequency 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-alarm trip). Application The CBS-4 earth leakage unit associated to the transformers of the WG / WGC Series allows an smart earth leakage protection. Its design features guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. Showing the value of the leak instantaneously on the display with the pre-alarm indications provides the information about the state of lines being protected, thus allowing the implementation of an adequate preventive maintenance approach. Protection No. of protections Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Associated circuit breaker LED indicator Display View 4 Independent lines A superimmunized True root mean square (TRMS) 0.03 A A Time defined: 0, s Inverse curve: instantaneous or selective External, TRANSFORMERS WG/WGP With built-in buttons, T & R Contact 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 external trans. indicator- Automatic self-reclosing enabled Features Auxiliary power supply 230 Vac (± 20 %) Hz Output contacts 250 Vac, 5 A Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 3 modules Weight 236 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC In addition, version CBS-4 C with RS-485 communications is used with the PowerStudio software, which allows the centralised supervision of the system in real time, with a record log that can be analysed later on. P1-20

21 WG Series CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG / WGC Series References Size Communications No. of Relays I n (A) Type Code 3 modules s CBS-4 P modules RS s CBS-4 C P12712 Connections P1-21

22 WG Series CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP Series Description Features Unit equivalent to 8 earth leakage protection networks. 8 independent programmable relays available 8 inputs to connect the external toroidal transformers of the WG / WGP Superimmunized Type A relay with high frequency 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-alarm trip). Application The CBS-8 earth leakage station associated to the transformers of the WG / WGP Series allows an smart earth leakage protection. Its design features guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. Showing the value of the leak instantaneously on the display with the pre-alarm indications provides the information about the state of lines being protected, thus allowing the implementation of an adequate preventive maintenance approach. In addition, RS-485 communications are used with the Power Studio software, which allows the centralised supervision of the system in real time, with a record log that can be analysed later on. Protection No. of protections Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Associated circuit breaker 8 Independent lines A superimmunized True root mean square (TRMS) 0.03 A A external transformers WG / WGS 0.03 A A external transformers WGP/WGSP Time defined: 0, s Inverse curve: instantaneous or selective External, TRANSFORMERS WG / WGP With built-in buttons, T & R Contact or Circuit breaker + trigger coil Self-reclosing No. of reclosures 0 Programming option Time between reclosures 0 Programming option s Partial counter reset time Double the reclosing time Power supply voltage Leakage trip LED indicator Pre-alarm Interlocked earth leakage reclosing Automatic self-reclosing enabled Instantaneous leak level indicator in each channel Display View Parameter programming Self-reclosing status Features Auxiliary power supply 230 Vac (± 20 %) Hz Output contacts 250 Vac, 5 A Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 8 modules Weight 609 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC P1-22

23 WG Series CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP Series References Size Communications No. of Relays I n (A) Type Code 8 modules RS A CBS-8 (*) P12811 (*) In the case of the A scale, use earth leakage transformers of the WGP / WGSP Connections P1-23

24 WG Series WGP Earth leakage Transformers of the WGP Series (only for CBS-8) Description The earth leakage transformers of the WGP Series have been designed to work only with the CBS-8 relay unit and a sensitivity of A. These transformers have a 1/5000 ratio. References WGP Useful diameter (mm) Weight (g) I n (A) Type Code 20 Ø 76 0, WGSP-20 P Ø 95 0, WGSP-30 P Ø 181 0, WGP-35 P Ø 274 0, WGP-70 P Ø 545 0, WGP-105 P Ø , WGP-140 P Ø , WGP-210 P x , WGP-70x175 P x , WGP-115x305 P x , WGP-150x350 P10128 WGSP Type A B C D E WGP ,5 35 WGP WGP WGP , WGP WGSP-20 WGSP-30 Type A B C D E F G H I WGP-70X ,5 WGP-115X WGP-150X P1-24

25 WRU-10 Differential relay with built-in transformer and display Description Features Electronic differential protection relay with builtin 28 mm transformer, constituting one unit. Type A high-insulation, with high-frequency current filter and high insulation. Monitoring using true root mean square. Display with LEDs and display: - differential protection settings. - protection trigger current. - protection status messages, etc. Units with three programmable output contact relays, one switched and two simple. The main relay is for the protection provided by the contact or trigger relay of the automatic switch while the two others are for the pre-alarm. It also has a voltage input for external triggering and re-arming. Assembly on DIN Rail (EN 50022) Reduced three-module size. Connection by pluggable terminals. Application WRU-10 relays allow for intelligent differential protection. Due to their design features, they assure maximum safety and continuity in electrical service, avoiding unwanted tripping.. Information on the state of the protected lines is made available through the visualization of the instantaneous leakage value on the display screen together with prealarm signals, allowing for effective preventive maintenance. Protection Class Measurement Sensitivity PROGRAMABLE Delay PROGRAMABLE Test y Reset Remote Control Associated circuit breaker LED indicator Circuit breaker control A superimmunized True root mean square (TRMS) 0, A, scalable up to 30 A by SETUP Time defined: 0, s, scalable up to 10s by SETUP. Inverse curve: Instantaneous or selective (IEC ) With built-in buttons, T & R External 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 external tripping. Through an NO/NC switched relay, depending on the connection with the circuit breaker Electric features Auxiliary power supply 230 Vac (± 30 %) 50 / 60 Hz Output contacts 250 Vac, 5 A / 230 Vac, 250 ma Operating temperature ºC Construction features Fixing DIN Rail (EN 50022) 3 modules Weight 275 g Degree of protection IP 20, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC P1-25

26 WRU-10 Differential relay with built-in transformer and display ,5 22,75 10 n28 27,25 References Size Net section (mm) I n (A) Delay Type Code 3 modules A extendible to 30 A s extendible to 10s Curve (Inverse): INS/SEL WRU-25 P2 Connections WRU-10 WRU-10 P1-26

27 WGBU Transformer with built-in earth leakage relay Description Features The WGBU Series is a compact earth leakage protection system. It is composed of a toroidal transformer with a built-in earth leakage relay. Multi-range electronic relay ythe sensitivity can be adjusted to A ytrigger delay of ws, adjustable Type A relay with high frequency current filtering and high immunity. Monitoring in true root mean square (TRMS). LED indicators: ygrid connection LED ypre-alarm and trigger LED: 1 flash every 2 s, leak between 25 and 50 % of the sensitivity selected; 1 flash every 1 s, leak between 50 and 75 % of the sensitivity selected; 1 flash every 0.5 s, leak exceeding 75 % of the sensitivity selected; permanently lit, trigger of the earth leakage protection. Application The WGBU series offers a reliable earth leakage protection, with simpler cabling and savings in the assembly time. In addition, installation is very simple, thanks to its compact dimensions. Earth leakage Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Associated circuit breaker LED indicator Remote Control (inputs) Circuit breaker control Protection A superimmunized True root mean square (TRMS) A s Built-in transformers of the WG With built-in buttons, T & R Contact or Circuit breaker + trigger coil Power supply voltage Trip due to leakage Pre-alarm External Test Option Through an NO/NC switched relay, depending on the connection with the circuit breaker Features Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz Output contacts 250 Vac, 6 A Operating temperature ºC Construction features Fixing DIN Panel / Rail Depending on the type Weight Depending on the type Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 60755, IEC 62020, IEC P1-27

28 WGBU Transformer with built-in earth leakage relay WGBU WGBU-90 Type A1 A2 B C D E WGBU-35 (A1) / WGBU (A2) ,5 35 WGBU-70 (A1) / WGBU (A2) WGBU-105 (A1) / WGBU (A2) WGBU-140 (A1) / WGBU (A2) , WGBU-210 (A1) / WGBU (A2) References Weight (g) Useful diameter (mm) I n (A) Delay (s) Type Code Ø 0, , WGBU-35 P Ø 0, , WGBU-70 P Ø 0, , WGBU-105 P Ø 0, , WGBU-140 P Ø 0, , WGBU-210 P Ø 0, , WGBU P Ø 0, , WGBU P Ø 0, , WGBU P Ø 0, , WGBU P Ø 0, , WGBU P16025 The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A. P1-28

29 WGBU Transformer with built-in earth leakage relay Connections Shunt coil Undervoltage coil P1-29

30 WRN-22 Earth leakage relay with built-in transformer Description Features The WRN-22 relay is an earth leakage relay with a built-in earth leakage transformer, with a diameter Ø 22 mm DIN Symmetrical profile coupling (EN 50022) The leakage is detected by means of sampling the earth leakage intensity and calculating its true root mean square (TRMS) Detection of the presence of voltage with LEDs TEST button. Application The WRN-22 earth leakage protection is a very interesting solution for small-scale installations with reduced space. Protection Class Measurement Sensitivity Delay Earth leakage transformer Test Associated circuit breaker Relay signaling A True root mean square (TRMS) 0,01 A / 0,03 A / 0,30 A (depending on the type) 0.02 s Internal With built-in button, TEST Circuit breaker + trigger coil Power supply voltage Leakage trigger Remote signaling (outputs) - Remote Control (inputs) External test Circuit breaker control Voltage 230 Vac Features Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz Output contacts - Operating temperature ºC Construction features Fixing DIN rail 3 modules Weight 146 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC 1008, IEC 255-5, UNE 801-2, UNE 801-3, UNE 801-4, UNE P1-30

31 WRN-22 Earth leakage relay with built-in transformer References Size Useful diameter (mm) I n (A) Delay (s) Type Code 3 modules 22 0,03 0,02 WRN P modules 22 0,3 0,02 WRN P modules 22 0,01 0,02 WRN P14214 Connections P1-31

32 Smart earth leakage protection + information: central@circutor.es Designed by Communication Dept. - CIRCUTOR, SA CIRCUTOR, SA - Vial Sant Jordi, s/n Viladecavalls (Barcelona) Spain Tel. (+34) Fax: (+34) central@circutor.es CIRCUTOR, SA reserves the right to change any of the information contained in this catalogue.