· wgbu differential transformers with ... produced by capacitive effects in the ... in a pc line....

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Page

Introduction 3

Earth leakage protection 4

Immunized earth leakage protection 5

Measurement in TRMS and Class A 6

Immunity against transient events 7

High frequency current fi ltering 7

I∆n setting at 85 % 8

Inverse curve 8

Remote control and self- resetting 9

Monitoring the protection 9

WG Series earth leakage relays with external transformer 10-11

CBS-4 / CBS-8 Multipoint earth leakage relays 12-13

WN Series earth leakage relays with external transformer 14

WGBU Differential transformers with front side 15

WRU / WRN Earth leakage relays with built in transformer 16-17

Dimensions / Connections 18

CONTENTS

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CIRCUTOR offers you the protection you require

Protection and continuity of electrical supply are two terms which cannot be separated if we want to guarantee the safety of users and electrical installations.

The increasing inclusions of receivers or loads which generate distortion in the electrical system make the use of protection necessary. These must discriminate between faults in the installation and electrical disturbances which simulate faults, creating unforeseen tripping of the protection.

The new range of earth leakage protection includes the highest performance to guarantee continuity and safety:

Measurement true effective valueHigh-frequency fi ltering Delay by inverse curve (instant and selective)Setting the trip to rated sensitivityDisplay of default current

Monitoring the status of the protection allows:

Knowing the installation’s status Prevention and maintenance in an installationReducing production downtimeDecresing maintenanceRapid fault fi nding

•••••

•••••

Protection

Immunized protection

Immunized protection Monitoring

Immunized protectionMonitoringremote controlself-resetting

4 forms of earth leakage protection

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When a faulty current is present in the electrical installation being protected, the earth protection equipment will work breaking the circuit and interrupting the electrical energy supply. This prevents danger when the faulty current reaches dangerous values which may electrocute people, either by direct or indirect contact and damaging property.

An earth leakage protection comprises three very different parts:

Sensor (transformer)RelayBreaking element

•••

Earth leakage protection

Sensor (transformer): current transformer which detects earth leakage current in the installation’s active conductors, giving a proportional signal to the relay. This may be geometrical, toroidal or rectangular, according to the layout of the plates or cabling which have been installed. For those sensors to work perfectly, passage through the conductors has to be as central as possible.

Relay: this is the intelligent part of the protection, the brain. It prepares and handles the signal delivered from the transformer and decides if it has to give a trip signal or not to the associated breaking element, depending on the preset sensitivity values and delay time.

Breaking element: This part back the up the current being cut. It may be a switch, an overload switch or contactor, etc.

•

•

•

These three parts may be found in different confi gurations in CIRCUTOR products:

All parts separated.Relay which includes an internal transformer.

••

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Nowadays it is common to have inopportune and unexpected trips in the installations. In these situations can be produced a trip of an earth leakage relay, or the simultaneous trips of several relays that are protecting an installation can appear. The reason is the presence of leakage currents through the earth conductor produced by capacitive effects in the installation.

These capacitive effects are caused by two main reasons:The wiring of the installation produces the effect of an earthed

capacitor. As longer as the wiring is, higher capacitive effect will be obtained.

The capacitors of the EMI fi lters, that are used in the equipment with electronic regulation of Power

•

•

Immunized Earth Leakage Protection

Different loads or consumption in an installation may be classifi ed into two broad groups depending on the type of earthing immunized:

Loads without earthing capacitors.

The immunized between the equipment and the ground may be represented by a pure ohm resistance. If resistance is suffi ciently high, current does not earth. Leakage current is zero (earth current under normal operating conditions).If an immunized fault occurs, the current would then earth. This is called an earth current fault (Id). See Fig.1

Loads without earthing capacitors:

In this case an earth current is produced by the equipment operating via its capacitors. Also, the length of the cables in an electrical installation may create capacitive earthing effects which would give rise to this sort of situation.There are two types of injecting this current.

- Permanent leakages.

The equipment permanently injects an earth current. This type of behaviour is very closely linked to the use of EMI fi lters which are built into the majority of electronically power controlled machines or loads in order to comply with the electro-magnetic compatibility directives. This type of fi lter prevents high frequency distortion generated by the receiver being returned to the system. Nevertheless it stems from the earth capacitors. It indirectly stems from the fundamental frequency and their corresponding harmonics in such a way that the leakage is usually a superimposition of high and low frequency. Therefore this increases the risk of an earth leakage trip without having an actual faulty earth current. See Fig.2

Fig.1

Fig.2

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earth

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Nowadays there are voltage and current wave forms which are no longer completely senoidal due to the fact that the loads distributed within the installation are not lineal. The appearance of continuous components and harmonics distort the waveforms and force a more rigorous measurement procedure.

Electronic earth leakage determines the true effective value of the leakage current by sampling it.

Waveforms in lineal, resistive loads are purely senoidal. On the other hand, as can be seen in the diagram, when they are no longer completely senoidal, the average value is no longer useful for measuring effective value with any degree of accuracy.

In order to solve this problem the earth leakage standards IEC 61008-1 determine the operating types for this waveform. There are two classes; Class AC and Class A.

Measurement in TRMS and A class

CLASS ACEarth leakage protection used here is for domestic situations or for protecting loads which do not produce AC distortions. The earth leakage protectors are marked with a symbol under the IEC 61008-1 standard.

CLASS AIf there are non lineal receivers present, earth leakage protection has to be type A. This means that they can measure d.c. components up to 6 mA, as well as non distorted currents (Type AC). They are marked with the corresponding IEC 61008-1 standard.

CIRCUTOR’s immunized earth leakage protection has been developed on the basis of fi ve factors to be able to meet our customers’ current requirements in terms of safety and continuity of electrical supply:

• MEASUREMENT IN TRMS AND CLASS A• IMMUNITY AGAINST TRANSIENT EVENTS• HIGH FREQUENCY FILTERING• I∆n TRIP SETTING• INVERSE CURVE

Transient leakages

The cables and the fi lters have the same capacitive effects as mentioned above due to transient over-voltages caused by system switching, circuit connection-disconnection or simply from the lightiyng.

For loads with earth capacitors, the basic problem for protection is to discern which earth current corresponds to the operation of the equipment itself and which earth current corresponds to an immunized fault. The electro-mechanical earth leakage relays do not usually resolve this type of situation. Fig.3

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earth

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Immunized against transient eventsThe IEC 61008-1 standard defi nes two types of lightning strike curves to be able to check the proper operation of the earth leakage protection: overcurrent wave and overvoltage wave. The overcurrent wave sees the effects produced in the measurements from the earth leakage device.The measurements from the overvoltage device are seen in the power supply.

The behaviour of the earth leakage protection when the transient overvoltages and overcurrent occur is very important in the maintenance of continuity of supply. For this reason CIRCUTOR immunized earth leakage protection relays are capable of withstanding signifi cant peaks.

Current → Curve 8 / 20 µs: ≈ 5 kAVoltage → Curve 1,2 / 50 µs: ≈ 4 kV

High frequency current

The IEC 479-1 / UNE 20-572-92 standard indicates the effects of a current passing through the human body at a frequency of 50 Hz. As can be seen, the effect depends on the effective value of the current through the body and the time which it happens. Given these effects, safety zones are set as area 1 (no perception area) and area 2 (perception area). Therefore earth leakage protection must operate in these areas to protect people.

a -Perception thresholdb -Non releasing thresholdc1 / c2 / c3 -Fibrillation threshold

1 - No perception2 - Perception3 - Reversible effects. Muscular tetany4 - Possible irreversible effects

When the frequency is increased the curves are moved to the right on the previous graph indicating that the current is less dangerous.

See the attached table according to IEC 479-2/ UNE 20-572-93, indicating that a fault current of 45 mA at 300 Hz as a same effect as a 30 mA at 50 Hz, for example. For receivers with the EMI filters, it may be considered that these inject a high-frequency earth current (>2 kHz) and a low frequency current. In this situation, class A Earth leakage protection devices is advised

Freq

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f f

Frequency f

Del

ay ti

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Sensitivity

Dur

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-fl ow

(ms)

Current passing through the body (mA)

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I∆n Settings

The IEC 61008-1 standard specifi es that both leakage switches must trip when the leak current is between 50% and 100% of the selected sensitivity value (I∆n). This means that above 50% the earth leakage switch may trip. This usually occurs in electromagnetic types. As stated previously, electrical installations have developed in such a way that this protection setting creates large problems by being too low installations.

CIRCUTOR electronic earth leakage protection sets the trip at around 100% of I∆n.Therefore there is less risk of tripping and therefore fewer cut outs in the installation when the default current is less than I∆n.

As can be seen in the two graphs, the earth leakage switch behaves differently during the same development of a faulty earthing current, although the I∆n sensitivity level is the same in both cases.

This I∆n setting allows more loads to be concentrated including earth capacitors on the same line to be protected; for example, in a Pc line. Each PC creates a 2 mA leakage current through its built in EMI fi lters in the capacitors. For a 30 mA I∆n sensitivity setting, seven PC may be installed with electromechanical earth leakage switches, but with CIRCUTOR Electronics type, 12 PC may be installed.

Inverse curve

The IEC 61008-1 allows the option of delaying the breaking action, depending on the leakage current level. Therefore with a higher faulty current the delay will be less. Two types of curve are specifi ed defi ned in the table below:

InstantSelective

When these curves are applied in our earth leakage protection, continuity of supply may be increased to avoid unforeseen tripping in the installation.

••

Type I∆n (A)Standardised operating time values (s)

I∆n 2 . I∆n 5 . I∆n 500 A

Instant All values 0,3 0,15 0,04 0,04Maximums

Selective > 0,03 0,5 0,2 0,15 0,15

Ear

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Ear

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akag

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rren

t Id

100 % I∆n 100 % I∆n

50 % I∆n

85 % I∆n

Time, t Time, t

t

Id I∆n

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In many applications, the value of the leakage current should be known at all times. This information is very useful for preventive and corrective maintenance in the installation, because action may be taken before a trip occurs.

For example,if the electrical insulation of a production machine becomes degradated, the earth leakage current will increase. If this information is known, suitable corrective actions may be taken to avoid tripping.

The idea is to build earth leakage currents into the installation’s energy control system as one more parameter to be checked.

Information may be presented in various ways depending on the type of product:In the earth leakage relay display.Via RS-485 Communications.Using auxiliary measurement equipment.

It is also possible to carry out recordings and histogrammes of the installation’s behaviour.

•••

Remote control and self-resetting

When earth leakage protections are required in installations with continuous electrical energy supply, but where there are no maintenance staff, remote control and self-resetting (or self-reclosing) is very useful .

Remote contro l is possib le through communications (RS-485, Ethernet, etc.), using the CIRCUTOR's PowerStudio Scada software.

This consists in checking the status of a protection and using it via a computer and communications.

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RGU-10 Electronic relay

Type Display Size Mounting Communications /n (A) Delay Code

RGU-10 Display 3 modules DIN rail -0,03 … 3 A0,03 …30 A

(PROGRAMMING)0,02...10 s, INS, SEL P11941

RGU-10C Display 3 modules DIN rail RS-4850,03 … 3 A0,03 …30 A

(PROGRAMMING)0,02...10 s, INS, SEL P11944

2 signalling LED’s- ON / Fault trip- Pre-alarm

RS-485 Communications (MODBUS protocol) (*)

Display to monitor:- Sensitivity- Delay time- Instant leakage current - Trip leakage current (red backlight when trip occurs)

Test and Reset buttons

Breaking element status monitoring

Display in TRMS: - Instant leakage current.- Trip leakage current.

Parameter setting via rotating menu. 5 buttons

Other electronic relays

Display Size Mounting /n (A) Delay Type CodeLED 2 modules DIN rail 0,03 0,02 s RGE-0,03 P12201LED 2 modules DIN rail 0,3 0,02 s RGE-0,3 P12211

LED 2 modules DIN rail 0,03...3 0,02...1 s RGE-R1 P12231

LED 2 modules DIN rail 0,03...5 0,02...5 s RGE-R P12231LED 4 modules DIN rail 0,03...3 0,02...1 s RGU P12011LED 4 modules DIN rail 0,03...30 0,02...1s RGUL 0,03-30 P12041

Display 72 x 72 panel 0,03...3 0,02...1 GU-72D P12311Display 72 x 72 panel 0,03...10 0,02...1 GUL-72D P12321

Earth leakage transformers, WG Series

Weight (g) Useful diameter (mm) Type Code

76 20 ø WGS-20 P10131

95 30 ø WGS-30 P10132

181 35 ø WG-35 P10111

274 70 ø WG-70 P10112

545 105 ø WG-105 P10113

1.222 140 ø WG-140 P10114

2.040 210 ø WG-210 P10115

2.400 70x175 WG-70 x 175 P10116

5.450 115x305 WG-115 x 305 P10117

7.400 150x350 WG-150 x 350 P10118

13.400 200x500 WG-200 x 500 P10119

Earth leakage relay with external transformer, WG Series

RGERGU

GU-72D

(*) according to type

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5 AAccesories

PA-TC/WGP19921

Adapter panel for RGU-10 and CBS-4

Electrical features

Auxiliary power supply 230 V a.c. (± 20%) 50 / 60 Hz (*)

Output contacts 250 V a.c. 6 A

Operating temperature -10 ºC / + 50 ºC

Mechanical features

Mounting DIN rail Panel

Dimensions 2 modules 3 modules 4 modules 72 x 72 mm

Weight 163 g 236 g 261 g 349 g

Protection grade Terminals: IP 20, Front side: IP 41

(*) Other values, on request

Features

Operating features

RGE 0,03 / 0,3 / 0,5 / R / R1 RGU-10 / RGU-10C RGU / RGUL GU72-D / GUL-72D

Protection

Class A superimmunized

Measuring True effective value (TRMS)

Sensitivity0,03 A / 0,30 A / 0,50 A /

0,03 … 3 A (R1) / 0,03 … 5 A (R)

0,03 … 3 A0,03 …30 A

(PROGAMATION)

0,03 … 3 A0,03 … 30 A

(RGUL)

0,03 … 3 A0,03 … 10 A (GUL-72D)

Delay0,02 / 0,02 … 1 s (R1) /

0,02 …5 s (R)Defi ned time: 0,02 … 10 s

Inverse curve: Instant or selective 0,02 … 1 s

Differential transformer External WG Series

Test and Reset Using built in buttons, T & R

Remote control Possible external test

Associated breaking element Contactor or circuit breaker + trip coil

LEd indicator

• In voltage. • Trip from leakage. • External Trans disconnection.• Pre-alarm (R-R1).

• In voltage. • Trip from leakage. • External Trans disconnection. • Pre-alarm.

• In voltage. • Trip from leakage. • Pre-alarm.

Display -

• Trip leakage current (red backlight when trip occurs)• Parameter programming. • Instant trip current.• External Trans disconnection.

- Instant trip current

Remote signalling -·• Pre-alarm.• Parameter display via RS485 communications (RGU-10C).

Leakage control signal(proportional alternating voltage)

Breaking element control Via switched relay NO/NC according to breaking element connection.

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FEATURES

CBS-4 CBS-8

Protection Earth leakage

Number of protection 4 8



Sensitivity 0,03 … 30 A 0,03…6 A with external transformers WG / WGS0,03…60 A with external transformers WGP / WGPS

Delay Defi ned time: 0,02 … 10 sInverse curve : Instant or selective

Defi ned time: 0,02 … 10 sIntensive curve: Instant or selective

Diferential transformer External, WG / WGP Series transformers


Associated breaking element Contactor o circuit breaker + trip coil

Self-reclosing

Number of reclosures Option for programming 0 … 10

Time between reclosures Option for programming 0 … 900 s

Return to zero time of partial counter Double of reconnection time

LED indicator

· In voltage· Trip from leakage· Prealarm· Sealed earth leakage reclosure· Self-reclosure enabled (CBS-8 only)· RS-485 Communication

Display

. Trip leakage current (red backlight when trip occurs)

. Display of instant leakage level in each channel

. Parameter programming

. Reclosure status

. External transf. disconnected display (CBS-4 only)

. Self-reclosing enabled (CBS-4 only)

Remote signalling (outputs)

Remot signalling contact Confi gurable output NO/NC on pre-alarm display/sealing (model with reclosure) Confi gurable output NO/NC on pre-alarm display

Communications Option for RS-485 communications. Supervision Software and POWERSTUDIO remote control

Breaking element control NC (normally open). One relay per channel.

NO/NC switched according to connection with breaking element. One relay per channel

Number of relays Relay operation I∆n (A) Delay Type Code

4 Protection 0,03...30 Programmable CBS-4 P12711

8 Protection 0,03...63 Programmable CBS-8 P12811

The CBS-4 / CBS-8 are multipoint earth leakage relays.They archieve simultaneous control of 4/8 points.

• 4 / 8 Class A earth leakage protection programmable relays• Frequency fi ltering• Disconnection delay via Inverse curve• Independent programming per channel

CBS-4 / CBS-8 Multipoint earth leakage relay

Reduction of unforeseen tripping

Increases the continuity of the production process

Reduce space

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CBS-4 CBS-8

Electrical features

Auxiliary power supply 230 V a.c.. (±20 %) 50 … 60 Hz


Operating temperature -10 oC / +50ºC

Mechanical features

Mounting DIN rail

Dimensions 3 modules 8 modules

Weight 236 g 609 g


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

CBS-4

2 signalling LED’s- ON / Fault trip- Pre-alarm / Reclosure status

Parameter setting via a rotating menu. 5 buttons.

Connection display with associated breaking element for earth leakage protection

Test and Reset buttons

Option for RS-485 communications. MODBUS protocol. Displays programming values, leak values, and each channel status.

Display in TRMS: - Instant trip current- Leakage current trip (red backlight when trip occurs)

Parameter display:- Sensitivity- Delay- Channel to be set.

5 AAccesories

WGP differential transformers

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WN Series, differential transformer

Weight Useful diameter∅ (mm) Type Code

82 g 20 ø WNS-20 P10221

100 g 30 ø WNS-30 P10222

148 g 35 ø WN-35 P10211

281 g 70 ø WN-70 P10212

433 g 105 ø WN-105 P10213

574 g 140 ø WN-140 P10214

1.201g 210 ø WN-210 P10215

RN Series, electronic relayDisplay Mechanism I∆n (A) Delay (s) Type Code

LED electronic 0,03 0,02 RN-0,03 P12101

LED electronic 0,3 0,02 RN-0,3 P12111

LED electronic 0,03...3 0,02...1 RN-R1 P12131

LED electronic 0,03...5 0,02...5 RN-R P12132

Features Serie RN


Class A Superimmunized


Sensitivity

0,03 A0,30 A

0,03 … 3 A (R1)0,03 … 5 A (R)

Delay0,02 s

0,02 … 1 s (R1) 0,02 …5 s (R)

Diferential transformers External, WN Series transformers


Associated breaking element Contactor or Overload+ trip coil

LED indicator

• In voltage• Trip from leakage• External transformer disconnection• Pre-alarm (R - R1)

Breaking element control Via switched relay NO/NC according to connection with breaking element

Remote control External test option

Electrical features

Auxiliary power supply 230 V a.c. (± 20%) 50 … 60 Hz


Operating temperature -10 ºC / +50 ºC

Mechanical features

Mounting DIN rail

Dimensions 2 modules

Weight 163 g



Earth leakage relays with external transformer, WN Series

5 AAccesories

PA-TC/WGP19921

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Features

WGBU




Sensiitivity 0,03...3 A

Delay 0,02...1 s

Diferential transformers External, WN Series transformers

Test and Reset Using built in button

Associated breaking element Contactor or Overload+ trip coil

LED indicator • In voltage • Trip from leakage • Pre-alarm

Remote control (inputs) External test option

Breaking element control Via switched relay NO/NC according to connection with breaking element

Electrical features WGBU

Auxiliary power supply 230 V a.c. (± 20 %) 50 … 60 Hz


Operating temperature -10 ºC / +50 ºC

Mechanical features

Mounting Panel / DIN rail

Dimensions According to type

Weight According to type



Earth leakage transformers with built-in relay, WGBU Series

Display Weight (g)

Useful diameter∅ (mm) I∆n (A) Delay (s) Type Code

LED 380 35 0,03...3 0,02...1 s (*) WGBU-35 P16011

LED 474 70 0,03...3 0,02...1 s (*) WGBU-70 P16012

LED 744 105 0,03...3 0,02...1 s (*) WGBU-105 P16013

LED 1422 140 0,03...3 0,02...1 s (*) WGBU-140 P16014

LED 2240 210 0,03...3 0,02...1 s (*) WGBU-210 P16015

(*) When sensitivity is adjusted at 0.03 A, tripping delay becames 0,02 s.

Display Weight (g)

Useful diameter∅ (mm) I∆n (A) Delay (s) Type Code

LED 380 35 0,03...3 0,02...1 s (*) WGBU-90-35 P16021

LED 474 70 0,03...3 0,02...1 s (*) WGBU-90-70 P16022

LED 744 105 0,03...3 0,02...1 s (*) WGBU-90-105 P16023

LED 1422 140 0,03...3 0,02...1 s (*) WGBU-90-140 P16024

LED 2240 210 0,03...3 0,02...1 s (*) WGBU-90-210 P16025

(*) When sensitivity is adjusted at 0.03 A, tripping delay becames 0,02 s.

WGBU

90o mounted relay. Reduces mounting space.

WGBU-90

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Earth leakage relays with built-in transformer

DisplayUseful

diameter (mm)

I∆n (A) Delay Type Code

LED 25 0,03...3 0,02...1 s (*) WRU-25 P14011

LED 35 0,03...3 0,02...1 s (*) WRU-35 P14021

(*) When sensitivity is ajusted at 0.03 A, tripping delay is 0 s

WRN-22 earth leakage is a very interesting solution for those solutions where high level protection is required, but where space is at a premium.In this situation any MCCB on the market may be used as a breaking element for earth leakage protection solely by associating it with an emission coil (if available)The following features are highlighted:

• Type A• Measurement in TRMS• Built-in transformer Ø = 22 mm• Sensitivity: 10 mA a 300 mA, according to type• Delay time: Fixed at 20 ms• Voltage presence detection• Suitable for installations up to 63 A• Small size: 3 modules• 230 V a.c. output.• May be associated with any 2 pole, 3 pole or 4 pole overload protection device

INPUT OUTPUT

Display Useful diameter (mm) I∆n (A) Delay Type Code

LED 22 0,03 0,02 s WRN-22-0,03 P14211

LED 22 0,3 0,02 s WRN-22-0,3 P14212

LED 22 0,01 0,02 s WRN-22-0,01 P14214

Breaking element: Overload + trip coil

WRU Series , earth leakage relay

WRN-22 Series, earth leakage relay

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Features

WRU-25 WRU-35 WRN-22 0,01/0,03/0,3

Protection Earth leagake



Sensitibity 0,03...3 A0,01 A0,03 A0,30 A

Delay 0,02...1 s 0,02 s

Diferential transformer Internal


Associated breaking element Contactor or circuit breaker + trip coil Circuit breaker + trip coil

Signalling in the relayPower

Trip from leakagePrealarm

••

•

PowerTrip from leakage

••

Remote signalling (outputs)Leakage control signal

(proportional a.c. voltage)- -

Remote control (inputs) Test External

Breaking element controlVia switched relay NO/NC according to

connection with breaking elementVoltage 230 V a.c.

Electrical features

Auxiliary power supply 230 V a.c. (± 20 %) 50 ... 60 Hz

Output contacts 250 V a.c. 6 A -

Operating temperature - 10 oC / +50 ºC

Mechanical features

Mounting Din rail

Dimensions 4 modules 6 modules 3 modules

Weight 228 g 403 g 146 g


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

5 AAccesories

WGP differential transformers (Only for CBS-8)

Useful diameter (mm) Type Code

20 ø WGSP-20 P10141

30 ø WGSP-30 P10142

35 ø WGP-35 P10121

70 ø WGP-70 P10122

105 ø WGP-105 P10123

140 ø WGP-140 P10124

210 ø WGP-210 P10125

Useful diameter (mm) Type Code

70x175 WGP-70x175 P10126

115x305 WGP-115x305 P10127

150x350 WGP-150x350 P10128

Blinding toroidal pipe

Type Code

TT-35 P19911

TT-70 P19912

TT-105 P19913

TT-140 P19914

TT-210 P19915

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Dimensions / Connections

RGE / RN

RGU-10

RGU

GU-72

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45110

140 70

WG / WGP / WN

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

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

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

Type A B C D E F G H I

WG-200 X 500 200 500 - 120 - 40 556 239 -

WGS / WGSP / WNS WRN-22

CBS-4

CBS-8

P1-20P1-20

P.1In

du

str

ial

Ea

rth

Le

ak

ag

e P

rote

ctio

n

Type A B C D E

WGBU-90-35 100 79 26 48,5 35

WGBU-90-70 130 110 32 66 70

WGBU-90-105 170 146 38 94 105

WGBU-90-140 220 196 48,5 123 140

WGBU-90-210 299 284 69 161 210

Type A B C D E

WGBU-35 166 79 26 48,5 35

WGBU-70 196 110 332 66 70

WGBU-105 236 146 38 94 105

WGBU-140 286 196 48,5 123 140

WGBU-210 365 284 69 161 210

WRU-25

WRU-35

WGBU WGBU-90


· wgbu differential transformers with ... produced by capacitive effects in the ... in a pc line....

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