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Smart earth leakage protection

Protection and control

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P1- Industrial earth leakage protection

WGCEarth leakage transformres WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-15

WGWG Series Earth Leakage transformers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-16

RG1MElectronic earth leakage relay with external transformer of the WG / WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-17

RGE / RGE-RElectronic earth leakage relay with external transformer of the WG / WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-19

RGU-10 / RGU-10 CElectronic earth leakage relay with external transformer of the WG / WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-21

CBS-4 / CBS-4 CEarth leakage monitoring and signaling unit of the external transformer of the WG / WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-23

CBS-8Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP / WGC Series · · · · · · · · · · · · · · · · · · · · · · ·P1-25

WGPEarth leakage Transformers of the WGP Series (only for CBS-8) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-27

WRU-10Relé diferencial con transformador incorporado con display (tipo A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-28

WRUEarth leakage relay with built-in transformer (type A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-30

WGBUTransformer with built-in earth leakage relay · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-32

WRN-22Earth leakage relay with built-in transformer · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·P1-35

P2- Self-reclosing overload and earth leakage protection

REC2Self-reclosing earth leakage relay · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-47

WRU-10 RALDifferential relay with built-in transformer and display (type A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-49

RGU-10 RALEarth protection Relay WG Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-51

CBS-4 RA / RALEarth leakage relay station WG / WGC Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-53

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CBS-8Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP / WGC Series · · · · · · · · · · · · · · · · · · · · · · P2-55

WRKRT-25Earth leakage relay with built-in transformer · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-57

MCBMCB Series Circuit-Breaker · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-59

WRU-10 MTRelé diferencial con transformador incorporado con display (tipo A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-61

RGU-10 MTEarth leakage Relay WG + MT Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-63

RGMTEarth leakage Relay WG + MT Series · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-65

MTMotorized circuit breaker (up to 63 A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-67

MT-FDEMotorized circuit-breaker (from 63 A) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-69

WRGMTComplete overload and earth leakage protection and reclosure equipment · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-71

RRMOverload reclosing relay · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · P2-72

Industrial earth leakage protection

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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 elec-trical installations.

The recent addition of receivers or loads that generate distortion in the electricity grid (speed variators, electronic start-up 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 altera-tions that cause the unwanted tripping of protection systems.

The new range of earth leakage pro-tection products offers state-of-the-art performance to guarantee the continuity and safety requirements:


}} 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 (monitor-

ing of protection systems)

Monitoring the status of protections al-lows us to do the following in the electri-cal installation:

}} Analyse the insulation conditions. }} Preventive and corrective mainte-

nance.}} Reduce production downtime. De-

crease maintenance costs. Quick loca-tion of faults.

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Protection

Immunised protection

Immunised protectionMonitoring

Immunised protectionMonitoring Remote controlReset

4 earth leakage protection methods

SAFETY OF PERSONS AND

MATERIALS

SAFETY OF PERSONS AND

MATERIALS

CONTINUITY ELECTRICAL

POWER SUPPLY


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When the earth leakage protection sys-tem detects a fault current, it acts on the electrical installation being protected, opening the circuit while interrupting the supply of electrical energy, thus pre-venting 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

Detecting element or sensor: Cur-rent 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 re-quires the path of capacitors to be as perfectly aligned as possible.

Relay: Smart protection element. It measures and treats the signal re-

Definition

Nowadays, "sympathy" or unwanted triggers are quite common in modern in-stallations. In these cases, one or more earth leakage switches are triggered si-multaneously, 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 earth-ing condensation effects. The longer the cable, the greater the capacity effect

}} The capacitors of EMI filters in the equipment with electronic power regula-tion

Immunised earth leakage protection

ceived by the sensor and either sends the trigger signal to the associated cir-cuit breaker or not, depending on the sensitivity and delay time values pro-grammed.

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

The different loads or consumption of an installation can be classified in two main groups, depending on the type of insula-tion from earth:

Loads with no earthed capacitors

The insulation existing between the unit and the earthing elements can be rep-resented 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, cur-rent will pass through earthing elements, the so-called fault earthed current, Id.


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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 opera-tions through its capacitors. In addition, the length of cables in an electrical in-stallation 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 be-haviour is closely tied to the use of EMI filters, which are installed in most ma-chines or loads with electronic power regulation, in order to comply with the electromagnetic compatibility directives. This type of filter prevents the high fre-quency distortion generated by the re-ceiver from being returned to the grid. However, it is transferred through the earthing capacitors. It also transfers in-directly the fundamental frequency and

its corresponding harmonics, so that the leakage is usually a set of overlapping high and low frequency signals. There-fore, it increases the risk of an earth leakage trip with no real earth leakage current.

Transient Leakages.

It has the same capacitive effects of ca-bles and the filters mentioned above for transient overvoltages caused by grid switching effects, the connection-dis-connection of circuits or effects that are simply caused by atmospheric agents.

In case of loads with earthed capaci-tors, the basic problem for the protec-tion of the system is to distinguish which earthed current is part of the unit's op-eration and which is part of an insulation defect. Electromechanical earth leak-age 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


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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 continu-ous and harmonic components can dis-tort the wave shapes, whereby it will be necessary to take more accurate meas-urements.

The current range of electronic earth leakage switches measures the root-mean-square-value (TRMS) of leakage currents by sampling it.

The wave shapes in installations with linear resistive loads are pure sine-waves. However, the figure shows how the mean value will not work to measure the root-mean-square-value with ac-curacy when it stops being a complete sine-wave.

In accordance with these problems, the IEC 61008-1 Earth Leakage Switch Standard determines the types of op-eration, depending on the type of wave. Two types are defined, Class AC and Class A.

CLASS AC

The earth leakage devices used in do-mestic installations or that protect loads that do not cause distortions can be of the AC Type. These devices are marked with a symbol, in compli-ance with the IEC 61008-1 Standard.

CLASS A

In the presence of non-linear receivers, Type A earth leakage protection sys-tems 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 cor-responding IEC 61008-1 Standard.

The IEC 61008-1 Standard defines two types of ray-type curves to check the correct operation of an earth leakage device: an overload and an overvolt-age wave. The overload wave shows the effects caused in the measurement of the earth leakage device and the ov-ervoltage wave shows the effects in the power supply.

Immunity against transient leakages

The behaviour of earth leakage pro-tection 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 manu-factured by CIRCUTOR can support very high peaks.

Voltage: Curve 1.2 / 50 μs: ≈ 4 kV

Current: Curve 8 / 20 µs: ≈ 5 kA


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High-frequency current

Adjustments of I∆n

The IEC 479-1 / UNE 20-572-92 Stand-ard 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-mean-square-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.

When the frequency increases, the curves are displaced to the right of the

a. Perception thresholdb. "No-drop" thresholdc1 / c2 / c3. Fibrilation threshold

1. No perception2. Perception3. Reversible effects. Muscle tetany4. Potentially irreversible effectsD

elay

tim

e

Sensitivity

Freq

uenc

y fa

ctor

Ff

Frequency f

The following graphs show that with an identical evolution of the fault earthed current in the same installation, the be-haviour 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 con-centrate more loads that incorporate earthed capacitors within the same line being protected. For example, in a com-puter installation: Each unit diverts a current, Ileakage, of 2 mA through the EMI filter capacitors included. At a sensitiv-ity of (I∆n) 30 mA, you can install 7 com-puters with the electromechanical earth leakage switches. However, if you use CIRCUTOR's electronic switches you can install a total of 12.

Faul

t ear

thed

cur

rent

I d

100 % I∆n

50 % I∆n

Time, t

Faul

t ear

thed

cur

rent

I d

100 % I∆n

85 % I∆n

Time, t

The IEC 61008-1 Standard specifies that earth leakage switches must be triggered when the fault earthed current is between 50% and 100% of the sen-sitivity value (I∆n) selected. This means that the values that exceed 50% can set off the earth leakage switch trig-ger. 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 ad-justment of protection can cause great problems, since it is too low. The elec-tronic earth leakage protection systems offered by CIRCUTOR determine the trigger near 100 % of I∆n.

Therefore, we have a lower risk of trig-gers and less interruptions in the instal-lation's supply than when the fault cur-rent is lower than I∆n.

previous graph, which indicates that the current is less dangerous.See the table attached, in accordance with IEC 479-2/ UNE 20-572-93, 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 protec-tion systems is specified in these cases.


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Inverse curve

Monitoring protection elements

Remote control and reset

The IEC 61008-1 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 installa-tion's power supply and avoid unwanted trips.

The leakage current value must be available at all times in many applica-tions. This information is quite useful for the installation's preventive and correc-tive 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 leaka-ge currents in the installation's energy

control system, thus controlling an addi-tional 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 communica-

tions system.}} With an auxiliary measurement unit.

In addition, records and logs of the in-sulation behaviour of the installation can be taken.

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 Pow-erStudio Scada software. This function can control the status of protection sys-tems and perform a set of actions through a computer and communications sys-tems.

Type Instantaneous Selective

I∆n (A) All values > 0,03

Stan

dard

ised

ope

ratin

g tim

e va

lues

(s)

I∆n 0,3 0,5

2 . I∆n 0,15 0,2

5 . I∆n 0,04 0,15

500 A 0,04 0,15

Maximum

t

Id I∆n


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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 solu-tion 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 accord-ance 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

Earth leakage transformer

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-re-closing earth leakage protection relays.

It performs the following functions:

}} Detection of anomalies (earth leak-age or overload) through the signal gen-erated 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 connection-disconnection tasks.

Circuit breaker

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 asso-ciated to self-reclosing relays are as follows:

}} Motorized circuit breaker (MT)}} Contact circuit breaker with remote

control (MCB), with a dual circuit break-er and contact function (the function of the contact is bistable).

Features of the circuit breaker:

}} Nominal current (in contacts)}} Nominal current and thermal protec-

tion 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

TRANSFORMERRELAY

Treatment of the signal, measurement and trigger

CIRCUIT BREAKERmonitored


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Parameters related to self-reclosing relays

Relay status indicator

The indications are associated to the type of protection, distinguishing be-tween instantaneous triggers and inter-lockings. 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 protec-tions

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 reclos-ing meters, provided that the maximum number of reclosures is not exceeded.

Example: The WRU-25 RA relay has a maximum number of reclosures avail-able before being pushed to its interlock-ing.

In installations with a transient earth leak-age 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 disap-pears, so that the relay will remain in the

ON position. This is when the reset timer of the reclosing meter will be set off.

The RESET option starts the relay, reset-ting 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 func-tions with specific inputs.

The RESET option resets the relay and the reclosing meters.

Number of reclosures, distin-guished by type and number of self-reclosing

Each relay enables a maximum number of reclosures before setting off the in-terlocking. The meter will be reset au-tomatically if the maximum number of reclosures is not exceeded within a pre-established period of time (reset time of reclosing meters).

This number will be different, in accord-ance 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.


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Product selection table

Equipment External toroidal Internal toroidal No. of outputs Indications Communications In (A) Page

RG

1M Type WG / WGC 17

RG

E / RG

E-R

Type WG / WGC - 1 LEDs -Depending on the type0.03 ... 5 A

19

RG

U-10 / R

GU

-10 C

Type WG / WGC - 1 + pre-alarm Display Only for type RGU-10 C

0.03 ... 3 A0.3 ... 30 A 21

CB

S-4 / CB

S-4 C

Type WG / WGC - 4 + pre-alarm Display Only for type CBS-4 C

0.03 ... 3 A0.3 ... 30 A 23

CB

S-8 Type WG-WGP - 8 + pre-alarm Display Yes 0.03 ... 6.3 A0.3 ... 63 A 25

WR

U-10

-Depending on the type25 - 35 mm

1 LEDs - 0.03 ... 3 A 28

WG

BU

/ WG

BU

-90

- 35 ... 210 mm 1 LEDs - 0.03 ... 3 A 30

WR

N-22

- 22 mm 1 LEDs - 0.01 A0.03 A0.3 A 33


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References

Earth leakage transformres WGC SeriesWGC

Dimensions WGC

Type A B C D

WGC 25 25 60,5 64

WGC 35 35 70,5 75,5

WGC 55 55 92 98 38

WGC 80 80 124,5 130 60

WGC 110 110 163 168 84,5

WGC 140 140 201 206 110

WG Series

Description

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 faci-litate its installation.

The WGC series earth leakage transformers have a greater immu-nity 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 cur-rent) of the transformer-relay set is established by the associated relay.

Useful diameter (mm) Weight (g) In (A) Type Code

25 Ø 80 acc. relay WGC 25 P10151

35 Ø 120 acc. relay WGC 35 P10152

55 Ø 160 acc. relay WGC 55 P10153

80 Ø 300 acc. relay WGC 80 P10154

110 Ø 420 acc. relay WGC 110 P10155

140 Ø 760 acc. relay WGC 140 P10156


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Useful diameter (mm)

Weight (g) In (A) Type Code

20 Ø 76 acc. relay WGS-20 P10131

30 Ø 95 acc. relay WGS-30 P10132

35 Ø 181 acc. relay WG-35 P10111

70 Ø 274 acc. relay WG-70 P10112

105 Ø 545 acc. relay WG-105 P10113

140 Ø 1 222 acc. relay WG-140 P10114

210 Ø 2 040 acc. relay WG-210 P10115

70 x 175 2 400 acc. relay WG-70x175 P10116

115 x 305 5 450 acc. relay WG-115x305 P10117

150 x 350 7 400 acc. relay WG-150x350 P10118

200 x 500 13 400 acc. relay WG-200x500 P10119

References

WG Series Earth Leakage transformersWG

WGS Dimensions

WG Dimensions

Type A B C D E

WG-35 100 79 26 48,5 35

WG-70 130 110 32 66 70

WG-105 170 146 38 94 105

WG-140 220 196 48,5 123 140

WG-210 299 284 69 161 210

Type A B C D E F G H I

WG-70X175 70 175 225 85 22 46 261 176 7,5

WG-115X305 115 305 360 116 25 55 402 240 8

WG-150X350 150 350 415 140 28 55 460 285 8


WG-200X500 200 500 - 140 - 62 585 285 -

WGS-20

WGS-30

WG Series

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.


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Electronic earth leakage relay with external transformer of the WG / WGC Series

RG1M

Protección

Class A superimmunized

Measurement True root mean square (TRMS)

Sensitivity 30 or 300 mA

Delay 20 ms

Earth leakage transformer External WG / WGC Series

Test and Reset With built-in buttons, T & R

Remote Control External Test Option

Associated circuit breaker Contactor or automatic circuit breaker using a coil trigger

LED indicator• Power supply voltage• Leakage trigger• Disconnection of external transformer

Circuit breaker control 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 -10 ... +65 ºC

Construction features

Fixing DIN Rail 46277 (EN 50022)

Dimensions 1 module

Weight 85 g

Degree of protection IP 20 terminals

Standards

IEC 60947-2, IEC 60755, IEC 62020, IEC 61008

Application

The RG1M relays combined with the WG / WGC transformer provides complete diffe-rential protection, both on single-phase and three-phase lines.

FeaturesDescription

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 sensi-tivity and delay}} Measurement using true root mean squa-

re (TRMS) value }} DIN 46277 (En50022) Rail mounting}} Reduced one module size.}} LED status indication.}y Power ON LED.}y Leakage led ON. Tripped relay.}y Power LED flashing and leakage LED

ON. Detection of a transformer continuity fault

WG Series


P1-18

Size Attachment In (A) Delay Type Code

1 modules DIN rail 0.03 0.02 s RG1M-0.03 P12204

1 modules DIN rail 0.3 0.02 s RG1M-0.3 P12214

References‏

Dimensions

Connections

Electronic earth leakage relay with external transformer of the WG Series

RG1MWG Series

66 mm72 mm 17.5 mm

45 m

m

64 m

m90

mm

Type WG

1S1 1S2

7 8

1 2

3 4

5 6

RG1M

230V;5A

50/60 Hz230 V±20%

Test / Reset

NL1 L2 L3

Type WG

1S11S2

7 8

1 2

3 4

5 6

RG1M

230V;5A

50/60 Hz230 V±20%

Test / Reset

NL1 L2 L3

- Rearme manual.Disparo por BOBINA DE MÍNIMA

CARGA

Disparo por BOBINA DE EMISIÓN

CARGA

- Rearme manual.


P1-19


RGE / RGE-R

Protection



Sensitivity 0.03 A / 0.3 A / 0.5 A / 0.03 ... 3 A (R1) / 0.03 ... 5 A (R)

Delay 0.02 / 0.02 ... 1 s (R1) / 0.02 ... 5 s (R)

Earth leakage transformer External, TRANSFORMERS WG / WGC



Associated circuit breaker Contact or Circuit breaker + trigger coil

LED indicator• Power supply voltage• Trip due to leakageDisconnection of the external transformerPre-alarm (R-R1)

Display View -

Remote signaling -

Circuit breaker control Through an NO/NC switched relay, depending on the connection with the circuit breaker

Features

Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz (other values on demand)





Dimensions 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 61000-6-3, 61000-6-1, 61010-1Application

The relays of the RGE series and the trans-former 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 ser-vice, avoiding unwanted tripping.

FeaturesDescription

Electronic earth leakage protection relay, used to connect to the earth leakage trans-formers WG / WGC Series

}} These electronic relays offer a high reli-ability, 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 46277}} Reduced size: 2 modules}} LED indicators:}y Permanently lit leak indicator }y LED: Trigger relay}y Flashing power LED and lit leak LED:

detection of faults in the transformer's con-tinuity}y Flashing leak LED indicator (only RGE-R

and RGE-R1): Leak with a value under the value selected}y 1 flash every 2 s: 25 ... 50 % of the leak-

age current}y 1 flash every 1 s: 50 ... 75 % }y 2 flashes every 1 s: 75 ... <100 %}y Permanently: 100 %

WG Series


P1-20

Size Fixing In (A) Delay Type Code

2 modules DIN rail 0,03 0.02 s RGE-0.03 P12201

2 modules DIN rail 0,3 0.02 s RGE-0.3 P12211

2 modules DIN rail 0,03 ... 3 0.02 ... 1 s RGE-R1 P12231

2 modules DIN rail 0,03 ... 5 0.02 ... 5 s RGE-R P12232

References

Dimensions

Connections

Shunt coil tripping Undervoltage coil tripping

Electronic earth leakage relay with external transformer of the WG Series

RGE / RGE-RWG Series

EXTERNAL RESET EXTERNAL RESET

SHUNTCOIL

LOAD LOAD

UNDERVOLTAGECOIL

EXTERNAL RESET EXTERNAL RESET

SHUNTCOIL

LOAD LOAD

UNDERVOLTAGECOIL


P1-21


RGU-10 / RGU-10 C

Protection



Sensitivity0.03 ... 3 A0.03 ... 30 A(PROGRAMMING)

Delay Time defined: 0,02 ... 10 sInverse curve: Instantaneous or selective

Earth leakage transformer External, TRANSFORMERS WG / WGC




LED indicator

• Power supply voltage• Trip due to leakage• Disconnection of the external transformer• Pre-alarm

Display View

• Current trip (red display when triggered)• Programming parameters• Instantaneous leakage current• Disconnection of the external transformer

Remote signaling• Pre-alarm• Display of parameters with RS-485 communications (RGU-10 C)


Features

Auxiliary power supply 230 Vac (± 20 %) 50 / 60 Hz (other values on demand)






Weight 236 g


Standards

IEC 61008-1, IEC 755, IEC 255-5

Application

The RGU-10 relays associated to the trans-formers 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 instantane-ously on the display with the pre-alarm in-dications provides the information about the state of lines being protected, thus allowing the implementation of an adequate preven-tive maintenance approach.

In addition, version RGU-10 C with RS-485 communications is used with the Power Stu-dio software, which allows the centralised supervision of the system in real time, with a record log that can be analysed later on.

FeaturesDescription

Electronic earth leakage protection relay, used to connect to the earth leakage trans-formers 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 inde-

pendent programmable outputs (main and pre-alarm)}} External input for remote control functions

( 230 Vac).

WG Series


P1-22

Size Communications In (A) Delay Type Code

3 modules -0.03 ... 3 A0.03 ... 30 A(PROGRAMMING)

0.02...10 s, INS, SEL RGU-10 P11941

3 modules RS-4850.03 ... 3 A0.03 ... 30 A(PROGRAMMING)

0.02...10 s, INS, SEL RGU-10 C P11944

References

Dimensions

Connections


RGU-10 / RGU-10 CWG Series

Shunt coil Undervoltage coil


P1-23

Earth leakage monitoring and signaling unit of the external transformer of the WG / WGC Series

CBS-4 / CBS-4 C

Protection

No. of protections 4



Sensitivity 0.03 A ... 30 A

Delay Time defined: 0,02 ... 10 sInverse curve: instantaneous or selective

Earth leakage transformer External, TRANSFORMERS WG/WGP



LED indicator

• Power supply voltage• Leakage trip• Pre-alarm• Interlocked earth leakage self-reclosing

Display View

• 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 %) 50 ... 60 Hz






Weight 236 g


Standards

IEC 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN 61000-6-3, 61000-6-1, 61010-1

Application

FeaturesDescription

}} Unit equivalent to 4 earth leakage protec-tion 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).

The CBS-4 earth leakage unit associated to the transformers of the WG / WGC Series al-lows an smart earth leakage protection. Its design features guarantee maximum security and continuity of the electrical service, avoid-ing unwanted tripping.


In addition, version CBS-4 C with RS-485 communications is used with the PowerStu-dio software, which allows the centralised supervision of the system in real time, with a record log that can be analysed later on.

WG Series


P1-24

Size Communications No. of Relays In (A) Type Code

3 modules - 4 0.03 ... 30 s CBS-4 P12711

3 modules RS-485 4 0.03 ... 30 s CBS-4 C P12712

References

Dimensions

Connections


CBS-4 / CBS-4 CWG Series


P1-25

Earth leakage monitoring and signaling unit of the external transformer of the WG / WGP / WGC Series

CBS-8

Protection

No. of protections 8



Sensitivity 0.03 A ... 6.3 A external transformers WG / WGS / WGC0.03 A ... 63 A external transformers WGP/WGSP

Delay Time defined: 0,02 ... 10 sInverse curve: instantaneous or selective

Earth leakage transformer External, TRANSFORMERS WG / WGP / WGC



Self-reclosing

No. of reclosures 0 Programming option ... 10

Time between reclosures 0 Programming option ... 900 s

Partial counter reset time Double the reclosing time

LED indicator

• Power supply voltage• Leakage trip• Pre-alarm• Interlocked earth leakage reclosing• Automatic self-reclosing enabled

Display View• Instantaneous leak level indicator in each channel• Parameter programming• Self-reclosing status

Features

Auxiliary power supply 230 Vac (± 20 %) 50 ... 60 Hz






Weight 609 g


Standards

IEC 664, VDE 0110, IEC 801, UL 94, IEC 348, IEC 571-1, EN 61000-6-3, 61000-6-1, 61010-1

Application

FeaturesDescription

}} Unit equivalent to 8 earth leakage protec-tion networks. 8 independent programmable relays available}} 8 inputs to connect the external toroidal

transformers of the WG / WGP / WGC}} 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).

The CBS-8 earth leakage station associated to the transformers of the WG / WGP / WGC Series allows an smart earth leakage protec-tion. Its design features guarantee maximum security and continuity of the electrical ser-vice, avoiding unwanted tripping.


In addition, RS-485 communications are used with the Power Studio software, which allows the centralised supervision of the sys-tem in real time, with a record log that can be analysed later on.

WG Series


P1-26

References

Dimensions

Connections


CBS-8WG Series

CBS-8

45

110

140 70

Size Communications No. of Relays In (A) Type Code

8 modules RS-485 8 0.03 ... 63 A CBS-8 (*) P12811

(*) In the case of the 0.3 ... 63 A scale, use earth leakage transformers of the WGP / WGSP


P1-27

References

Earth leakage Transformers of the WGP Series (only for CBS-8)

WGP

WGSP Dimensions

WGP Dimensions

Type A B C D E

WGP-35 100 79 26 48,5 35

WGP-70 130 110 32 66 70

WGP-105 170 146 38 94 105

WGP-140 220 196 48,5 123 140

WGP-210 299 284 69 161 210


WGP-70X175 70 175 225 85 22 46 261 176 7,5

WGP-115X305 115 305 360 116 25 55 402 240 8

WGP-150X350 150 350 415 140 28 55 460 285 8

WGSP-20

WGSP-30

Useful diameter (mm) Weight (g) In (A) Type Code

20 Ø 76 0,3 ... 63 WGSP-20 P10141

30 Ø 95 0,3 ... 63 WGSP-30 P10142

35 Ø 181 0,3 ... 63 WGP-35 P10121

70 Ø 274 0,3 ... 63 WGP-70 P10122

105 Ø 545 0,3 ... 63 WGP-105 P10123

140 Ø 1 222 0,3 ... 63 WGP-140 P10124

210 Ø 2 040 0,3 ... 63 WGP-210 P10125

70 x 175 2 400 0,3 ... 63 WGP-70x175 P10126

115 x 305 5 450 0,3 ... 63 WGP-115x305 P10127

150 x 350 7 400 0,3 ... 63 WGP-150x350 P10128

WG Series

Description

The earth leakage transformers of the WGP Series have been de-signed to work only with the CBS-8 relay unit and a sensitivity of 0.3 ... 63 A. These transformers have a 1/5000 ratio.


P1-28

Relé diferencial con transformador incorporado con display (tipo A)

WRU-10

Protección

Clase A superinmunizada

Medida Verdadero valor eficaz, TRMS

Sensibilidad PROGRAMABLE 0,03 ... 3 A, ampliable hasta 30 A por SETUP

Retardo PROGRAMABLETiempo definido: 0,02 ...1 s, ampliable hasta 10s por SETUP. Curva inversa: INStantánea / SELectiva. (IEC 60947-2)

Test y Reset Mediante pulsadores T y R

Control Remoto Posibilidad de TEST externo, disparo por entrada libre de tensión.

Elemento de corte asociado Contactor o interruptor automático con bobina de disparo

Indicación por LED/DISPLAY

- Tensión de alimentación- Disparo por fuga- Prealarma

- Parámetros de protección- Lectura corriente de fuga/disparo.- Estados de TEST y disparo externo.

Control de elemento de corte Relé de contacto conmutado NA/NC según elementode 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 -20 ...+70 ºC

Características mecánicas

Fijación Carril DIN 46722 (EN 50022)

Dimensiones 3 módulos

Peso 275 g

Grado de protección IP 20, transcuadro IP 41

Normas

IEC 60947-2, IEC 60755, IEC 62020, IEC 61008

Application

FeaturesDescription

Electronic differential protection relay with built-in 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 con-

tact 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 trigge-

ring and re-arming.}} Assembly on DIN Rail 46277 (EN 50022)}} Reduced three-module size.}} Connection by pluggable terminals.

Los relés WRU-10 permiten una protección difencial inteligente. Por sus características de diseño aseguran la máxima seguridad t conti-nuidad en el servicio eléctrico, evitándose dis-paros intempestivos.

El poder visualizar el valor de fuga instantánea en el display, conjuntamente con las indicacio-nes de prealarma, permite tener información del estado de las líneas que protegen, y reali-zar un buen mantenimiento preventivo.


P1-29

References‏

Dimensions

ConnectionsWRU-10 WRU-10

Differential relay with built-in transformer and display (type A)

WRU-10

Size Net section (mm) In (A) Delay Type Code

3 modules 28 ∅ 0.03 ... 3 A extendible to 30 A

0.02 ... 1 s extendible to 10s Curve(Inverse): INS/SEL

WRU-25P2

45

44

52,5

n2827

,25

73

1022,75

75

85


P1-30

Earth leakage relay with built-in transformer (type A)

WRU

Protection



Sensitivity 0.03 ... 3 A

Delay 0.02 ... 1 s

Earth leakage transformer Internal


Remote Control (inputs) External test


Relay signaling• Power supply voltage• Trip due to leakage• Pre-alarm

Remote signaling (outputs) Leak control signal (proportional alternating voltage) (only in WRU-25)


Features





Fixing DIN rail

Dimensions 4 modules (WRU-25), 6 modules (WRU-35)

Weight 228 g (WRU-25), 403 g (WRU-35)


Standards

IEC 1008, IEC 255-5, UNE 801-2, UNE 801-3, UNE 801-4, UNE 60730-1

Application

FeaturesDescription

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 0.03 ... 3 A}} The delay in the trigger can be adjusted

to 0.02 ... 1 s}} LED indicator of the leak level (% sensi-

tivity):}y 1 flash every 2 s: between 25 and 50 %}y 1 flash every 1 s: between 50 and 75 %}y 1 flash every 0.5 s: between 75 and 90 %}} Adjustable to the DIN profile 46277 (EN

50022)

The WRU Series allows a reliable and im-munised 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 protec-tion, with the optional adjustment of the sen-sitivity and time.


P1-31

References

Dimensions

Connections

WRU-25 WRU-35

Earth leakage relay with built-in transformer (type A)

WRU

SizeUseful diameter

(mm) In (A) Delay Type Code

4 modules 25 0,03 ... 3 0.02 ... 1 s WRU-25 P14011

6 modules 35 0,03 ... 3 0.02 ... 1 s WRU-35 P14021

The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A.

WRU-25

WRU-35

1

1

22


P1-32

Transformer with built-in earth leakage relayWGBU

Earth leakage Protection



Sensitivity 0.03 ... 3 A

Delay 0.02 ... 1 s

Earth leakage transformer Built-in transformers of the WG



LED indicator• Power supply voltage• Trip due to leakage• Pre-alarm

Remote Control (inputs) External Test Option


Features





Fixing DIN Panel / Rail

Dimensions Depending on the type

Weight Depending on the type


Standards

IEC 61008-1, IEC 755, IEC 255-5

Application

The WGBU series offers a reliable earth leakage protection, with simpler cabling and savings in the assembly time. In addition, in-stallation is very simple, thanks to its compact dimensions.

FeaturesDescription

The WGBU Series is a compact earth leak-age protection system. It is composed of a toroidal transformer with a built-in earth leak-age relay.

}} Multi-range electronic relay}y The sensitivity can be adjusted to 0.03 ... 3 A}y Trigger delay of 0.02 ... 1 ws, adjustable}} Type A relay with high frequency current

filtering and high immunity. Monitoring in true root mean square (TRMS).}} LED indicators:}y Grid connection LED}y Pre-alarm and trigger LED: 1 flash every

2 s, leak between 25 and 50 % of the sen-sitivity selected; 1 flash every 1 s, leak be-tween 50 and 75 % of the sensitivity select-ed; 1 flash every 0.5 s, leak exceeding 75 % of the sensitivity selected; permanently lit, trigger of the earth leakage protection.


P1-33

References

DimensionsTransformer with built-in earth leakage relayWGBU

Weight (g)Useful diameter (mm) In (A) Delay (s) Type Code

380 35 Ø 0,03 ... 3 0,02 ... 1 WGBU-35 P16011

474 70 Ø 0,03 ... 3 0,02 ... 1 WGBU-70 P16012

744 105 Ø 0,03 ... 3 0,02 ... 1 WGBU-105 P16013

1422 140 Ø 0,03 ... 3 0,02 ... 1 WGBU-140 P16014

2240 210 Ø 0,03 ... 3 0,02 ... 1 WGBU-210 P16015

380 35 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-35 P16021

474 70 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-70 P16022

744 105 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-105 P16023

1422 140 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-140 P16024

2240 210 Ø 0,03 ... 3 0,02 ... 1 WGBU-90-210 P16025

The delay is cancelled in all relays with a sensitivity adjustment of 0.03 A.

WGBU

WGBU-90

Type A1 A2 B C D E

WGBU-35 (A1) / WGBU-90-35 (A2) 166 100 79 26 48,5 35

WGBU-70 (A1) / WGBU-90-70 (A2) 196 130 110 332 66 70

WGBU-105 (A1) / WGBU-90-105 (A2) 236 170 146 38 94 105

WGBU-140 (A1) / WGBU-90-140 (A2) 286 220 196 48,5 123 140

WGBU-210 (A1) / WGBU-90-210 (A2) 365 299 284 69 161 210


P1-34

Shunt coil

Undervoltage coil

ConnectionsTransformer with built-in earth leakage relayWGBU


P1-35

Earth leakage relay with built-in transformerWRN-22

Protection

Class A


Sensitivity 0,01 A / 0,03 A / 0,30 A (depending on the type)

Delay 0.02 s

Earth leakage transformer Internal

Test With built-in button, TEST

Associated circuit breaker Circuit breaker + trigger coil

Relay signaling • Power supply voltage• Leakage trigger

Remote signaling (outputs) -

Remote Control (inputs) External test

Circuit breaker control Voltage 230 Vac

Features


Output contacts -



Fixing DIN rail


Weight 146 g


Standards

IEC 1008, IEC 255-5, UNE 801-2, UNE 801-3, UNE 801-4, UNE 60730-1

Application

The WRN-22 earth leakage protection is a very interesting solution for small-scale in-stallations with reduced space.

FeaturesDescription

The WRN-22 relay is an earth leakage relay with a built-in earth leakage transformer, with a diameter Ø 22 mm

}} DIN 46277 Symmetrical profile coupling (EN 50022)}} The leakage is detected by means of

sampling the earth leakage intensity and cal-culating its true root mean square (TRMS)}} Detection of the presence of voltage with

LEDs}} TEST button.


P1-36

References

Dimensions

Connections

Earth leakage relay with built-in transformerWRN-22

SizeUseful diameter

(mm) In (A) Delay (s) Type Code

3 modules 22 0,03 0,02 WRN-22-0.03 P14211

3 modules 22 0,3 0,02 WRN-22-0.3 P14212

3 modules 22 0,01 0,02 WRN-22-0.01 P14214


P1-37

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

M5ZZF1 P19921

TT-35 P19911

TT-70 P19912

TT-105 P19913

TT-140 P19914

TT-210 P19915

WG --

only for WG-35 up to WG-70

WG

P

-- only for WGP-35 up to WGP-70

RG

U-1

0

-- --

CB

S only CBS-4 -- --

WN --

only for WGC-25 up to WGC-55

RN

-10

-- --

WG

BU

-- --


P1-38

smart earth leakage protection - metartec ltd - smart earth leakage... · smart earth leakage...

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