Protection and control P. 1 /2. Smart earth leakage protection

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1 Protection and control P. 1 /2 Smart earth leakage protection

2 P. 1 /2 Smart earth leakage protection Introduction 5 P.1 - Industrial earth leakage protection Product selection table 13 WG Earth leakage transformers, WG series 15 RGE / RGE-R Electronic earth leakage relay with external transformer of the WG Series 16 RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG Series 18 CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG Series 20 CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP Series 22 WGP Earth leakage Transformers of the WGP Series (only for CBS-8) 24 WN Earth leakage transformers, WN series 25 RN / RN-R Electronic earth leakage relay with external transformer of the WN Series 26 RN-10 Electronic earth leakage relay with external transformer of the WN Series 28 WRU Earth leakage relay with built-in transformer (type A) 30 WGBU Transformer with built-in earth leakage relay 32 WRN-22 Earth leakage relay with built-in transformer 35 Relation between products and accessories 37 P2- Self-reclosing overload and earth leakage protection Earth leakage protection and self-reclosing REC2 Self-reclosing earth leakage relay P2-47 P1/2-2

3 Earth leakage protection P. 1 /2 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 Monitoring Immunised protection Protection P1/2-5

4 P. 1 /2 Earth leakage protection 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 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 received 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. P1/2-6

5 Earth leakage protection P. 1 /2 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 P1/2-7

6 P. 1 /2 Earth leakage protection 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 P1/2-8

7 Earth leakage protection P. 1 /2 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 P1/2-9

8 P. 1 /2 Earth leakage protection 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 Power- Studio Scada software. This function can control the status of protection systems and perform a set of actions through a computer and communications systems. P1/2-10

9 Earth leakage protection P. 1 /2 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). of the circuit breaker: Nominal current (in contacts) Nominal current and thermal protection curve (in circuit breakers) of the control inputs of the operational element Circuit-breaking power Auxiliary NO or NC signalling of the circuit breaker's status P1/2-11

10 P. 1 /2 Earth leakage protection 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 P1/2-12

11 Industrial earth leakage protection P.1 Product selection table Equipment External toroidal Internal toroidal No. of outputs Indications Communications I n (A) Page RG1M 16 RGE / RGE-R Type WG - 1 LEDs - Depending on the type A 18 RGU-10 / Type WG pre-alarm Display Only for type RGU-10 C A A 20 CBS-4 / Type WG pre-alarm Display Only for type CBS-4 C A A 22 CBS pre-alarm Display Yes A A 24 Type WG-WGP RN1M 28 RN / RN-R Type WN - 1 LEDs - Depending on the type A 30 RN-10 Type WN pre-alarm LEDs A 32 WRU-10 - Depending on the type mm 1 LEDs A 34 WGBU / mm 1 LEDs A 38 WRN mm 1 LEDs A 0.03 A0.3 A 41 P1-13

12 P.1 Industrial earth leakage protection P1-14

13 Industrial earth leakage protection P.1 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 P1-15

14 P. 1 /2 Earth leakage protection WG Series RG1M Electronic earth leakage relay with external transformer of the WG Series Description WG series electronic differential protection relay for connection to external WG/WGS 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 transformer provides complete differential protection, both on single-phase and threephase 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 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 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 P1-16

15 45 mm 64 mm 90 mm Earth leakage protection P. 1 /2 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. P1-17

16 P.1 Industrial earth leakage protection WG Series RGE / RGE-R Electronic earth leakage relay with external transformer of the WG Series Description Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG 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 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 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 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN , , The relays of the RGE series and the transformer of the WG series enable a full earth leakage protection for both single and threephase lines. They guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. P1-18

17 Industrial earth leakage protection P.1 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 P1-19

18 P.1 Industrial earth leakage protection WG Series RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG Series Description Electronic earth leakage protection relay, used to connect to the earth leakage transformers WG 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 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 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 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 755, IEC P1-20

19 Industrial earth leakage protection P.1 WG Series RGU-10 / RGU-10 C Electronic earth leakage relay with external transformer of the WG 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 P1-21

20 P.1 Industrial earth leakage protection WG Series CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG Series Description 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 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, 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. Protection No. of protections 4 Class A superimmunized Measurement True root mean square (TRMS) Sensitivity 0.03 A A Delay Time defined: 0, s Inverse curve: instantaneous or selective Earth leakage transformer Test and Reset Associated circuit breaker 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 self-reclosing Current trip (red display when triggered) Instantaneous leak level indicator in each channel Display View Parameter programming State of the self-reclosing- Disconnected external trans. indicator- Automatic self-reclosing enabled 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 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN , , P1-22

21 Industrial earth leakage protection P.1 WG Series CBS-4 / CBS-4 C Earth leakage monitoring and signaling unit of the external transformer of the WG 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 P1-23

22 P.1 Industrial earth leakage protection WG Series CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP Series Description 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 8 Class A superimmunized Measurement True root mean square (TRMS) Sensitivity 0.03 A A external transformers WG/WGS 0.03 A A external transformers WGP/WGSP Delay Time defined: 0, s Inverse curve: instantaneous or selective Earth leakage transformer Test and Reset Associated circuit breaker 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 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 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN , , P1-24

23 Industrial earth leakage protection P.1 WG Series CBS-8 Earth leakage monitoring and signaling unit of the external transformer of the WG 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 P1-25

24 P.1 Industrial earth leakage protection 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 P1-26

25 Industrial earth leakage protection P.1 WN Series WN WN Series Earth leakage transformers Description R eferences The earth leakage transformers of the WN Series have been designed to work with the relays of the WN Series. Useful diameter (mm) Weight (g) I n (A) Type Code The sensitivity (trigger current) of the transformer-relay set is established by the associated relay. 20 Ø 82 acc. relay WNS-20 P Ø 100 acc. relay WNS-30 P Ø 148 acc. relay WN-35 P Ø 281 acc. relay WN-70 P Ø 433 acc. relay WN-105 P Ø 574 acc. relay WN-140 P Ø acc. relay WN-210 P10215 WN WNS WNS-20 WNS-30 Type A B C D E WN ,5 35 WN WN WN , WN P1-27

26 P. 1 /2 Earth leakage protection WN Series RN1M Electronic earth leakage relay with external transformer of the WN Series Description WN series electronic differential protection relay for connection to external WN/WNS 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 RN1M relays combined with the WN transformer provides complete differential protection, both on single-phase and three-phase lines. Protection 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 WN 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 Auxiliary power supply 230 V c.a. (± 20 %) 50 / 60 Hz Output contacts 250 V c.a., 6 A Operating temperature C 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 P1-28

27 45mm 64 mm 90 mm Earth leakage protection P. 1 /2 WN Series RN1M Electronic earth leakage relay with external transformer of the WN Series 66 mm 72 mm 17.5 mm R eferences Size Attachment I n (A) Delay Type Code 1 modules DIN rail 0,03 0,02 s RN1M-0,03 P modules DIN rail 0,3 0,02 s RN1M-0,3 P12114 Connections Bobina mínima 50/60Hz 230V±20% L1 L2 L3 N Bobina de emisión 50/60Hz 230V±20% L1 L2 L3 N RN1M S1 S2 Type WN 5 6 RN1M S1 S2 Type WN Test / Reset 230V,5A Test / Reset 230V,5A Disparo por BOBINA DE MÕNIMA - Rearme manual. CARGA Disparo por BOBINA DE EMISI N - Rearme manual. CARGA P1-29

28 P.1 Industrial earth leakage protection WN Series RN / RN-R Electronic earth leakage relay with external transformer of the WN Series Description Electronic earth leakage protection relay, used to connect the transformers of the WN / WNS Series These electronic relays offer a high reliability, with the option of a fixed or adjustable sensitivity and delay Monitoring of the true root mean square (TRMS) Assembly on DIN rail (EN 50022) Reduced size, with 2 modules LED status indicator: ypermanently lit leak LED: Tripped relay. yflashing Power LED and lit leak LED: Detection of a continuity fault in the transformer. yflashing leak indicator LED (only RN-R and RN-R1): Leak with a value that is lower than the value selected. Application The relays of the RN series and the transformer of the WN series enable a full earth leakage protection for both single and threephase lines. Protection Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Remote Control Associated circuit breaker LED indicator Circuit breaker control Remote Control A immunised 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 WN 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 (R-R1) Through an NO/NC switched relay, depending on the connection with the circuit breaker External Test Option 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) 2 modules Weight 163 g Degree of protection IP 20 Terminals, IP 41 back panel Standards IEC , IEC 755, IEC P1-30

29 Industrial earth leakage protection P.1 WN Series RN / RN-R Electronic earth leakage relay with external transformer of the WN Series References Size Indicator I n (A) Delay Type Code 2 modules LED 0, s RN-0.03 P modules LED 0, s RN-0.3 P modules LED 0, s RN-R1 P modules LED 0, s RN-R P12132 Connections Shunt coil EXTERNAL RESET Undervoltage coil EXTERNAL RESET SHUNT COIL UNDERVOLTAGE COIL LOAD LOAD P1-31

30 P.1 Industrial earth leakage protection WN Series RN-10 Electronic earth leakage relay with external transformer of the WN Series Description Electronic earth leakage protection relay s, used to connect the transformers of the WN / WNS Series Superimmunized Type A relay with high frequency current filtering and high immunity. Monitoring in true root mean square (TRMS) Visualization of data on the display Sensitivity can be programmed between 30 ma and 3 A Adjustable delay: instantaneous, selective or timed, up to 1 s Two independent programmable outputs (main and pre-alarm relay) External input for remote control functions (230 Vac) Automatic verification of the connection and status of the external transformer with an inductive test Reduced size, with 3 modules Application The RN-10 relays associated to the transformers of the WN series allow an smart earth leakage protection. Their design features guarantee maximum security and continuity of the electrical service, avoiding unwanted tripping. The instantaneous leakage value is shown on the display with the pre-alarm indicators, providing all information required about the status of lines being protected, as required for the preventive maintenance operations. 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 Auxiliary power supply Output contacts A superimmunized True root mean square (TRMS) A (PROGRAMMING) Time defined: 0, s Inverse curve: Instantaneous or selective External, TRANSFORMERS WN 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 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 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN , , P1-32

31 Industrial earth leakage protection P.1 WN Series RN-10 Electronic earth leakage relay with external transformer of the WN Series References Size Indicator I n (A) Delay Type Code 3 modules LED 0, s RN-10 P12140 Connections Shunt coil Undervoltage coil P1-33

32 P. 1 /2 Earth leakage protection WRU-10 Relé diferencial con transformador incorporado con display (tipo A) Description 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 Los relés WRU-10 permiten una protección difencial inteligente. Por sus características de diseño aseguran la máxima seguridad t continuidad en el servicio eléctrico, evitándose disparos intempestivos. El poder visualizar el valor de fuga instantánea en el display, conjuntamente con las indicaciones de prealarma, permite tener información del estado de las líneas que protegen, y realizar un buen mantenimiento preventivo. Protección Clase Medida Sensibilidad PROGRAMABLE Retardo PROGRAMABLE Test y Reset Control Remoto Elemento de corte asociado Indicación por LED/DISPLAY Control de elemento de corte A superinmunizada Verdadero valor eficaz, TRMS 0, A, ampliable hasta 30 A por SETUP Tiempo definido: 0, s, ampliable hasta 10s por SETUP. Curva inversa: INStantánea / SELectiva. (IEC ) Mediante pulsadores T y R Posibilidad de TEST externo, disparo por entrada libre de tensión. Contactor o interruptor automático con bobina de disparo - Tensión de alimentación - Disparo por fuga - Prealarma - Parámetros de protección - Lectura corriente de fuga/ disparo. - Estados de TEST y disparo externo. Relé de contacto conmutado NA/NC según elemento de corte Características eléctricas Alimentación auxiliar 230 V c.a. (± 30 %) 50 / 60 Hz Contactos salida disparo/prealarma 250 V c.a., 5 A / 230 V c.a., 250 ma Temperatura de uso ºC Características mecánicas Fijación Carril DIN (EN 50022) Dimensiones 3 módulos Peso 275 g Grado de protección IP 20, transcuadro IP 41 Normas IEC , IEC 60755, IEC 62020, IEC P1-34

33 Earth leakage protection P. 1 /2 WRU-10 Differential relay with built-in transformer and display (type A) R eferences 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 P1-35

34 P.1 Industrial earth leakage protection WRU Earth leakage relay with built-in transformer (type A) Description Electronic earth leakage protection relay with built-in transformer, with a diameter of 25 or 35 mm, depending on the type, creating a single set. Type A relay with high frequency current filtering and high immunity. Monitoring in true root mean square. The sensitivity can be adjusted to A The delay in the trigger can be adjusted to s LED indicator of the leak level (% sensitivity): y1 flash every 2 s: between 25 and 50 % y1 flash every 1 s: between 50 and 75 % y1 flash every 0.5 s: between 75 and 90 % Adjustable to the DIN profile (EN 50022) Application The WRU Series allows a reliable and immunised form of earth leakage protection, saving installation time. Its assembly is very simple, offering an adequate solution for all types of single and three-phase installations, since it offers compact earth leakage protection, with the optional adjustment of the sensitivity and time. Protection Class Measurement Sensitivity Delay Earth leakage transformer Test and Reset Remote Control (inputs) Associated circuit breaker Relay signaling Remote signaling (outputs) Circuit breaker control A superimmunized True root mean square (TRMS) A s Internal With built-in buttons, T & R External test Contact or Circuit breaker + trigger coil Power supply voltage Trip due to leakage Pre-alarm Leak control signal (proportional alternating voltage) (only in WRU-25) Through an NO/NC switched relay, depending on the connection with the circuit breaker Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz Output contacts 250 Vac, 6 A Operating temperature ºC Construction features Fixing DIN rail 4 modules (WRU-25), 6 modules (WRU-35) Weight 228 g (WRU-25), 403 g (WRU-35) 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 P1-36

35 Industrial earth leakage protection P.1 WRU Earth leakage relay with built-in transformer (type A) WRU-25 WRU-35 References Size Useful diameter (mm) I n (A) Delay Type Code 4 modules 25 0, s WRU-25 P modules 35 0, s WRU-35 P14021 The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A. Connections WRU-25 2 WRU P1-37

36 P.1 Industrial earth leakage protection WGBU Transformer with built-in earth leakage relay Description 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 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 755, IEC P1-38

37 Industrial earth leakage protection P.1 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. P1-39

38 P.1 Industrial earth leakage protection WGBU Transformer with built-in earth leakage relay Connections Shunt coil Undervoltage coil P1-40

39 Industrial earth leakage protection P.1 WRN-22 Earth leakage relay with built-in transformer Description 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 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 P1-41

40 P.1 Industrial earth leakage protection 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 P1-42

41 Industrial earth leakage protection P.1 Relation between products and accessories Adaptor panel PA-TC/WG TT Adaptor for 72 x 72 panel Accessory for assembly on DIN rail Core balance shield tube TT-35 P19911 TT-70 P19912 M5ZZF1 P19921 TT-105 P19913 TT-140 P19914 TT-210 P19915 WG -- only for WG-35 up to WG-210 WGP -- only for WGP-35 up to WGP-210 RGU CBS only CBS WN -- only for WN-35 up to WN-210 RN WGBU P1-43

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