Buyers Guide Oil Insulated Outdoor Instrument Transformers Ed 7 En

7/28/2019 Buyers Guide Oil Insulated Outdoor Instrument Transformers Ed 7 En

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Oil insulatedOutdoor Instrument TransormersBuyers Guide


2/722 Outdoor Instrument Transormers | Buyers Guide

Table o content

Products

Technicalinormation

Page

Introduction 3

Explanations 4

Silicone Rubber (SIR) Insulators 7

Design features and Advantages

Current transormers IMB 8

Inductive voltage transormers EMF 10

Capacitor voltage transormers CPB 12

Coupling capacitors CCB 14

Technical catalogues:

Current transormers IMB 17

Inductive voltage transormers EMF 33

Capacitor voltage transormers CPB 41

Coupling capacitors CCB 53

Optional

PQSensor 60

Cable entry kits - Roxtec CF 16 64

Quality, control and testing 66

Inquiry and ordering data 68


3/72Buyers Guide | Outdoor Instrument Transormers 3

Day ater day, all year aroundwith ABB Instrument Transormers

ABB has been producing instrument transformers for

more than 70 years. Thousands of our products perform

vital functions in electric power networks around the

world day after day, all year round.

Their main applications include revenue metering, control,

indication and relay protection.

All instrument transformers supplied by ABB are tailor-

made to meet the needs of our customers.

An instrument transformer must be capable of

withstanding very high stresses in all climatic conditions.

We design and manufacture our products for a service life

of at least 30 years. Actually, most last even longer.

Product range Type Highest voltage for equipment (kV)

Current Transformer IMB

Hairpin/Tank typePaper, mineral oil insulation, quartz illing

IMB 36 - 800 36 - 800

Inductive Voltage Transformer EMF

Paper, mineral oil insulation, quartz illing EMF 52 - 170 52 - 170

Capacitor Voltage Transformer CPB

CVD: Mixed dielectric polypropylene-ilm and synthetic oil.

EMU: Paper, mineral oil

CPB 72 - 800 72.5 - 800

Coupling Capacitors CCB

Mixed dielectric polypropylene-ilm and synthetic oil. CCB 72 - 800 72.5 - 800

We are exible and tailor make each instrument transormer to our customers needs.

Sizes other than those mentioned above can be supplied upon request.


4/724 Explanations | Buyers Guide

Explanations

Technical specifcations - GeneralStandard/Customer specification

There are international and national standards, as well as cus-

tomer specifcations. ABB High Voltage Products can meet most

requirements, as long as we are aware o them. When in doubt,

please enclose a copy o your specifcations with the inquiry.

System voltage

The system voltage is the maximum voltage (phase-phase),

expressed in kV rms, o the system or which the equipment is

intended. It is also known as maximum system voltage.

Rated insulation level

The combinat ion o voltage values which characterize the

insulation o an instrument transormer with regard to its ca-

pability to withstand dielectric stresses.

The rated value given is va lid or alt itudes 1000 m above sea

level. A correction actor is introduced or higher altitudes.

Lightning impulse test

The lightning impulse test is perormed with a standardized

wave shape 1.2/50 s or simulation o lightning overvoltage.

Rated Power Frequency Withstand Voltage

This test is to show that the apparatus can withstand the

power requency over-voltages that can occur.

The Rated Power Frequency Withstand voltage indicates the

required withstand voltage. The value is expressed in kV rms.

Rated SIWL

For voltages 300 kV the power-requency voltage test is

partly replaced by the switching impulse test. The wave shape

250/2500 s simulates switching over-voltage.

The rated Switching Impulse Withstand Level (SIWL) indi-

cates the required withstand level phase-to-earth (phase-

to-ground), between phases and across open contacts. The

value is expressed in kV as a peak value.

Rated Chopped Wave Impulse Withstand voltage,

Phase-to-earth

The rated chopped wave impulse withstand level at 2 s

and 3 s respectively, indicates the required withstand level

phase-to-earth (phase-to-ground).

Rated frequencyThe rated (power) requency is the nominal requency o the

system expressed in Hz, which the instrument transormer is

designed to operate in.

Standard requencies are 50 Hz and 60 Hz.

Other requencies, such as 16 2/3 Hz and 25 Hz might be ap-

plicable or some railway applications.

Ambient temperature

Average 24 hours ambient temperature above the standard-

ized +35 C inluences the thermal design o the transormers

and must thereore be speciied.

Installation altitude

I installed >1000 m above sea level, the external dielectricstrength is reduced due to the lower density o the air. Always

speciy the installation altitude and normal rated insulation

levels. ABB will make the needed correction when an altitude

higher than 1000 meters ASL is speciied. Internal insulation is

not aected by installation altitude and dielectric routine tests

will be perormed at the rated insulation levels.

Creepage distance

The creepage distance is deined as the shortest distance

along the surace o an insulator between high voltage and

ground.

The required creepage distance is speciied by the user in:

mm (total creepage distance)

mm/kV (creepage distance in relation to the highest system

voltage).

Pollution level

Environmental conditions, with respect to pollution, are some-

times categorized in pollution levels. Five pollution levels are

described in IEC 60815-1.

There is a relation between each pollution level and a corre-

sponding minimum nominal speciic creepage distance.

Pollution level Creepage distance

Phase - Ground voltage

Creepage distance (Old)

Phase - Phase voltage

mm/kV mm/kV

a - Very light 22.0 -

b - Light 27.8 16

c - Medium 34.7 20

d - Heavy 43.3 25

e - Very Heavy 53.7 31

Wind loadThe specifed wind loads or instrument transormers intended or

outdoor normal conditions are based on a wind speed o 34 m/s.


5/72Buyers Guide | Explanations 5

Current transormersCurrents

The rated currents are the values o pr imary and secondary

currents on which perormance is based.

Rated primary current

The rated current (sometimes reerred to as rated current,

nominal current or rated continuous current) is the maximum

continuous current the equipment is allowed to carry.

The current is expressed in A rms.

The maximum continuous thermal current is based on average24 h ambient temperature o +35 C.

It should be selected about 10 - 40% higher than the esti-

mated operating current. Closest standardized value should

be chosen.

Extended current ratings

A actor that mult iplied by the rated current gives the maxi-

mum continuous load current and the limit or accuracy. Stan-

dard values o extended primary current are 120, 150 and

200% o rated current. Unless otherwise speciied, the rated

continuous thermal current shall be the rated primary current.

Rated secondary current

The standard values are 1, 2 and 5 A. 1 A gives an overall

lower burden requirement through lower cable burden.

Rated short-time thermal current (Ith)

The rated short-time wi thstand current is the maximum cur-

rent (expressed in kA rms) which the equipment shall be able

to carry or a speciied time duration.

Standard values or duration are 1 or 3 s. Ith

depends on the

short-circuit power o the grid and can be calculated rom theormula: I

th= P

k(MW) / U

m(kV) x 3 kA.

Rated dynamic current (Idyn

)

The dynamic short-time current is according to IEC,

Idyn

= 2.5 x Ith

and according to IEEE, Idyn

= 2.7 x Ith

Reconnection

The current t ransormer can be designed with either primary

or secondary reconnection or a combination o both to obtain

more current ratios.

Primary reconnectionThe ampere-turns always remain the same and thereby the

load capacity (burden) remains the same. The short-circuit ca-

pacity however may be reduced or the lower ratios. Primary

reconnection is available or currents in relation 2:1 or 4:2:1.

Secondary reconnection

Extra secondary terminals (taps) are taken out rom the sec-

ondary winding. The load capacity drops as the ampere-turns

decrease on the taps, but the short-circuit capacity remains

constant. Each core can be individually reconnected.

Burden and Accuracy Class (IEC)

Burden

The external impedance in the secondary circuit in ohms at

the speciied power actor. It is usually expressed as the ap-

parent power in VA -, which is taken up at rated secondary

current. It is important to determine the power consumptiono connected meters and relays including the cables. Unnec-

essarily high burdens are oten speciied or modern equip-

ment. Note that the accuracy or the measuring core, accord-

ing to IEC, can be outside the class limit i the actual burden

is below 25% o the rated burden.

Accuracy

The accuracy class or measuring cores is according to the

IEC standard given as 0.2, 0.2S, 0.5, 0.5S or 1.0 depending

on the application. For protection cores the class is normally

5P or 10P. Other classes are quoted on request, e.g. class

PR, PX, TPS, TPX or TPY.

Rct

The secondary winding resistance at 75 C

Instrument Security Factor (FS)

To protect meters and instruments rom being damaged by

high currents, an FS actor o 5 or 10 is oten speciied or

measuring cores. This means that the secondary current will

increase maximum 5 or 10 times when the rated burden is

connected. FS10 is normally suicient or modern meters.

Accuracy Limit Factor (ALF)The protection cores must be able to reproduce the ault cur-

rent without being saturated.

The overcurrent actor or protection cores is called ALF.

ALF = 10 or 20 is commonly used.

Both FS and ALF are valid at rated burden only. I lower bur-

den the FS and ALF will increase.

Burden and Accuracy Class for other standards, such as

ANSI, IEEE, etc.

More detailed inormation about standards other than IEC

can be ound in our Application Guide, Outdoor InstrumentTransormers, Catalog Publication 1HSM 9543 40-00en or in

the actual standard.


6/726 Explanations | Buyers Guide

Voltage transormersVoltages

The rated voltages are the values o pr imary and secondary

voltages on which the perormance is based.

Voltage factor (FV)

It is important that the voltage transormer, or thermal and

protection reasons, can withstand and reproduce the continu-

ous ault overvoltages that can occur in the net. The over-

voltage actor is abbreviated as FV.

The IEC standard speciies a voltage actor o 1.2 cont inu-ously and simultaneously 1.5/30 sec. or systems with eec-

tive grounding with automatic ault tripping, and 1.9/8 hrs or

systems with insulated neutral point without automatic ground

ault systems.

Accuracy, according to IEC, or measuring windings is uli lled

between 0.8 and 1.2 x rated voltage and or protection wind-

ings up to the voltage actor (1.5 or 1.9 x rated voltage).

Reconnection

The voltage transormer can be designed with secondary

reconnection.Secondary reconnection means that extra secondary termi-

nals (taps) are taken out rom the secondary winding(s).

Burden and accuracy class

Burden

The externa l impedance in the secondary circuit in ohms at

the speciied power actor. It is usually expressed as the ap-

parent power in VA -, which is taken up at the rated sec-

ondary voltage.

(See Current Transormers above).

The accuracy class or measuring wind ings, according to IEC,is given as 0.2, 0.5 or 1.0 depending on the application. A

rated burden o around 1.3-1.5 times the connected burden

will give maximum accuracy at the connected burden.

For protection purposes the class is normally 3P or 6P

Simultaneous burden (IEC)

Metering windings and protection windings not connected in

open delta are considered as simultaneously loaded. A pro-

tection winding connected in open delta is not considered as

a simultaneous load.

Thermal limit burden

Thermal limi t burden is the total power the transormer can

supply without excessively high temperature rise. The trans-

ormer is engineered so that it can be loaded with the imped-

ance corresponding to the load at rated voltage, multiplied by

the square o the voltage actor. This means that at a voltage

actor o 1.9/8h, or example, the limit burden = total rated

burden x 1.92.

The transormer cannot be subjected to a higher limit burden

without being loaded higher than the rated burden. Conse-

quently, because o loading considerations, it is unnecessary

to speciy a higher thermal limit burden.

Voltage drop

The voltage drop in an external secondary circuit (cables and

uses) can have a signiicantly larger inluence on the system

ratio error than incorrect burden.

Ferroresonance

Ferroresonance is a potential source o transient overvoltage.

Three-phase, single-phase switching, blown uses, and bro-

ken conductors can result in overvoltage when erroresonance

occurs between the magnetizing impedance o a transormer

and the system capacitance o the isolated phase or phases.For example, the capacitance could be as simple as a length

o cable connected to the ungrounded winding o a trans-

ormer. Another example o erroresonance occurring is when

an inductive voltage transormer is connected in parallel with

a large grading capacitor across the gap o a circuit breaker.

Ferroresonance is usually known as a series resonance.

Additional for Capacitor Voltage Transformers (CVT) and

Capacitor Voltage Divider (CVD)

Capacitance phase - ground

Requirements or capacitance values can be applicable whenusing the CVT or communication over lines (or relay unc-

tions or remote control).

PLC = Power Line Carrier.

Higher capacitance => Smaller impedance or signal.

The ABB line matching unit can be adjusted to any capaci-

tance within requency range 50-500 kHz.

The lower applied requency decide the minimum capacitance

o coupling capacitor.

More information regarding instrument transformers

More detailed inormation about instrument transormers canbe ound in our Application Guide, Outdoor Instrument Trans-

ormers. Catalog Publication 1HSM 9543 40-00en

Explanations



Silicone Rubber Insulators

Wide range of instrument transformers with silicone rubber

(SIR) insulators

ABB can supply most o our instrument t rans ormers with

patented helical extrusion-moulded silicone rubber insulation.

CT IMB 36 - 800 kV

VT EMF 52 - 170 kV

CVT CPB 72 - 800 kV

CC CCB 72 - 800 kV

Why Silicone Rubber Insulators?Ceramic (porcelain) insulators have perormed well or several de-

cades, but one o the disadvantages with porcelain is its ragility.

Listed below are some o the advantages o silicone rubber

insulators compared to porcelain:

Non-brittle

Minimum risk or handling and transport damages

Minimum risk or vandalism

Light-weight

Explosion saety

Excellent pollution perormance Minimum maintenance in polluted areas

Hydrophobic

There are several polymeric insulator materials available,

of which silicone has proven to be superior.

Comparison of polymeric insulators

Epoxy EP-rubber Silicone

Brittle Low Excellent Excellent

Insulation Fair Good Excellent

Weight Good Excellent Excellent

Mechanical strength Excellent Good Excellent

Saety Good Good Excellent

Earthquake Good Excellent Excellent

Handling Good Excellent Excellent

Maintenance Fair Fair Excellent

Ageing Fair Good Exce llent

UV-resistance Good Good Excellent

Experience of material

ABB has used silicone rubber (SIR) insu lators s ince 1985,

starting with surge arresters, and has gained considerable

experience thereo.

ABB manufacturing technique

The patented helical extrusion moulded silicone rubber insula-

tors without joints (chemical bonds between spirals) mini-

mizes electrical ield concentrations and reduces build-up o

contamination. The cross-laminated iberglass tube inside the

insulator provides high mechanical strength.

Completed tests

The silicone material used or ABB Inst rument Transormers is

approved according to IEC and ANSI/IEEE standards.

Tests perormed: Acce lerated ageing test (1000 h)

Lightning impulse test, wet power requency test and wet

switching impulse test

Short circuit test

Temperature rise test

Color

The (SIR) insulators or the instrument transormers are sup-

plied in a light gray color.

Deliveries

ABB in Ludvika has supplied instrument transormers with(SIR) insulators or the most severe conditions, rom marine

climate to desert and/or polluted industrial areas.

A reerence l ist can be provided on request.



IMBDesign eatures and advantages

ABBs oil minimum current transformers type IMB is based

on a hairpin design (shape of the primary conductor) also

known as tank type. The basic design has been used by

ABB for more than 70 years, with more than 170 000 units

delivered.

The design corresponds with the demands o both the IEC

and IEEE standards. Special design solutions to meet other

standards and/or speciications are also available.

The unique illing with quartz grains saturated in o il gives a

resistant insulation in a compact design where the quantity ooil is kept to a minimum

The IMB transormer has a very lexible design that, or ex-

ample, allows large and/or many cores.

Primary winding

The primary winding consists o one or more parallel conduc-

tor o aluminum or copper designed as a U-shaped bushing

with voltage grading capacitor layers.

The insu lation technique is automated to give a simple and

controlled wrapping, which improves quality and minimizes

variations.

The conductor is insulated with a special paper with high

mechanical and dielectric strength, low dielectric losses and

good resistance to ageing.

This design is a lso very suitable or pr imary windings with

many primary turns. This is used when the primary current is

low, or instance unbalance protection in capacitor banks.

(Ex. ratio 5/5 A)

Cores and secondary windings

The IMB type current transormers are lexib le and can nor-mally accommodate any core coniguration required.

Cores or metering purposes are usually made o nickel alloy,

which eatures low losses (= high accuracy) and low satura-

tion levels.

The protection cores are made o high-grade oriented stee l

strip. Protection cores with air gaps can be supplied or spe-

cial applications.

The secondary winding consists o double enamelled cop-

per wire, evenly distributed around the whole periphery o thecore. The leakage reactance in the winding and also between

extra tapping is thereore negligible.

Impregnation

Heating in a vacuum dries the windings. Ater assembly all

ree space in the transormer (approx. 60%) is illed with clean

and dry quartz grain. The assembled transormer is vacuum-

treated and impregnated with degassed mineral oil. The trans-

ormer is always delivered oil-illed and hermetically sealed.

Tank and Insulator

The lower section o the transormer consists o an aluminum

tank in which the secondary windings and cores are mounted.

The insu lator, mounted above the transormer tank, consists

as standard o high-grade brown-glazed porcelain. Designsusing light gray porcelain or silicon rubber can be quoted on

request.

The seal ing system consists o O-ring gaskets.

Expansion system

The IMB has an expansion vessel placed on top o the insula-

tor. A hermetically sealed expansion system, with a nitrogen

cushion compressed by thermal expansion o the oil, is used

in the IMB as the standard design. An expansion system with

stainless steel expansion bellows can be quoted on request.

On request Capacitive voltage tap

The capacitive layers in the h igh voltage insu lation can be

utilized as a capacitive voltage divider. A tap is brought out

rom the second to last capacitor layer through a bushing on

the transormer tank (in the terminal box or in a separate box,

depending on the IMB tank design). An advantage o the ca-

pacitive terminal is that it can be used or checking the condi-

tion o the insulation through dielectric loss angle (tan delta)

measurement without disconnecting the primary terminals.

The tap can also be used or voltage indication, synchronizing

or similar purpose, but the output is limited by the low capaci-

tance o the layers.

The load connected must be less than 10 kohms and the tap

must be grounded when not in use.

One model o IMB 72 - 123 is provided with a DDF (Dielectric Dis-

sipation Factor) terminal in the secondary terminal box. The

terminal must be connected to ground during normal service, but

can be disconnected rom ground and used or checking the

dielectric dissipation actor o the internal high voltage insulation

between primary terminals and ground



Climate

The transormers are designed or, and are insta lled in, widely

shiting conditions, rom polar to desert climates all over the

world.

Service life

The IMB transormer is hermetically sealed and the low and

even voltage stress in the primary insulation gives a reliable

product with expected service lie o more than 30 years. The

IMB and its predecessors have since the 1930s been supplied

in more than 170 000 units.

Expansion system

The expansion system, with a ni trogen gas cushion, increases

operating reliability and minimizes the need o maintenance

and inspections. This type o expansion system can be used

in the IMB since the quartz illing reduces the oil volume and a

relatively large gas volume minimizes pressure variations.

For higher rated currents an expansion vessel with external

cooling ins is used to increase the cooling area and heat dis-

sipation to the surrounding air.

An expansion system with gas- illed stainless stee l expansionunits surrounded by the oil and compressed by oil expansion

can be quoted on request.

Quartz filling

Minimizes the quantity o oil and provides a mechanical sup-

port or the cores and primary winding during transport and in

the event o a short-circuit.

Flexibility

The IMB covers a wide range o primary currents up to 4 000 A.

It can easily be adapted or large and/or many cores by in-

creasing the volume o the tank.

Resistance to corrosion

The selected aluminum alloys give a high degree o resistance

to corrosion, without the need o extra protection. Anodized

parts or IMB 36-170 kV can be oered on request, or use in

extreme environments.

IMB >170 kV can be delivered with a protective painting.

Seismic strength

The IMB has a mechanical ly robust construction, designed to

withstand high demands o seismic acceleration without the

need o dampers.

Current Transformer IMB

1

3

4

8

9

10

11

5

7

6

2

1 Gas cushion

2 Oil i ll ing uni t (hidden)

3 Quartz illing

4 Paper-insulated primary

conductor

5 Cores/secondary windings

6 Secondary te rminal box

7 Capac it ive vol tage tap

(on request)

8 Expans ion vessel

9 Oil sight glass

10 Primary termina l

11 Ground terminal



ABBs inductive voltage transformers are intended for

connection between phase and ground in networks with

insulated or direct-grounded neutral points.

The design corresponds with the requirements in the IEC and

IEEE standards. Special design solutions to meet other stan-

dards and customer requirements are also possible.

The transormers are designed with a low lux density in the

core and can oten be dimensioned or 190% o the rated

voltage or more than 8 hours.

Primary windingsThe primary winding is designed as a mult i-layer coil o double

enamelled wire with layer insulation o special paper.

Both ends o the windings are connected to metal shields.

Secondary and tertiary windings

In its standard design the transormer has a secondary

measurement winding and a tertiary winding or ground ault

protection, but other conigurations are available as required.

(2 secondary windings in a design according to IEEE standard)

The windings are designed with double enamelled wire and

are insulated rom the core and the primary winding with

pressboard (presspahn) and paper.The windings can be equipped with additional terminals or

other ratios (taps).

Core

The transormer has a core o careully selected materia l, to

give a lat magnetization curve. The core is over-dimensioned

with a very low lux at operating voltage.

Impregnation

Heating in a vacuum dries the windings. Ater assembly, all

ree space in the transormer (approximately 60%) is illed with

clean and dry quartz grains. The assembled transormer isvacuum-treated and impregnated with degassed mineral oil.

The transormer is a lways delivered oil- illed and hermet ical ly

sealed.

Tank and insulator

EMF 52-170: The lower section o the transormer consists o

an aluminum tank in which the winding and core are placed.

The tank consists o selected aluminum alloys that give a high

degree o resistance to corrosion, without the need o extra

protection. Anodized aluminum can be oered on request.

The seal ing system consists o O-ring gaskets.

The insu lator, in i ts standard design, consists o high qual ity,

brown glazed porcelain. The voltage transormers can also be

supplied with silicone rubber insulators.

Expansion system

The EMF has an expansion vessel placed on the top sect ion

o the porcelain. The EMF has a closed expansion system,

without moving parts and with a nitrogen cushion, that is

compressed by the expansion o the oil. A prerequisite or this

is that the quartz sand illing reduces the oil volume, and the

use o a relatively large gas volume, which gives small pres-

sure variations in the system.

Ferro-resonance

The design o the EMF notably counteracts the occurrence o

erro-resonance phenomena:

The low lux in the core at the operating voltage gives a

large saety margin against saturation i erro-resonance

oscillations should occur.

The lat magnetization curve gives a smooth increase o

core losses, which results in an eective attenuation o the

erro-resonance.

I the EMF transormer will be installed in a network with

a high risk or erro-resonance, it can, as a urther saety

precaution, be equipped with an extra damping burden, on a

delta connected tertiary winding. See the igure below.

EMFDesign eatures and advantages

Damping of ferro-resonance

a n a n a n

A N A N A N

da dn da dn da dn

60 ohm, 200 W

R

S

T



Climate

These transormers are designed or, and are installed in a

wide range o shiting conditions, rom polar to desert cli-

mates all over the world.

Service Life

The low and even voltage stresses in the primary winding give

a reliable product with a long service lie. EMF and its prede-

cessors have been supplied in more than 60 000 units since

the 1940s.

Expansion systemThe expansion system based on the nitrogen cushion gives

superior operating reliability and minimizes the need o main-

tenance and inspection o the transormer.

Quartz filling

Minimizes the quantity o oil and provides a mechanical sup-

port to the cores and primary winding.

Resistance to corrosion

EMF 52-170: The selected aluminum alloys give a high degree

o resistance to corrosion without the need o extra protection.

Anodized aluminum can be o ered on request.

Seismic strength

EMF is designed to withstand the high demands o seismic

acceleration.

Voltage transformer EMF 145

1 Primary terminal

2 O il level s ight glass

3 Oil

4 Quartz illing

5 Insulator

6 Liting lug

7 Secondary terminal box

8 Neut ral end terminal

9 Expansion system

10 Paper insulat ion

11 Tank

12 Primary w inding

13 Secondary windings

14 Core

15 Secondary te rminals

16 Ground connect ion

1

2

4

5

7

8

9

12

13

14

15

16

11

10

3

6



CPBDesign eatures and advantages

ABBs Capacitor Voltage Transformers (CVTs) are intended

for connection between phase and ground in networks

with isolated or grounded neutral.

ABB oers a world-class CVT with superior erro-resonance

suppression and transient response.

The design corresponds to the requirements o IEC and al l

national standards based upon them. Special designs to meet

other standards and customer unique speciications are also

available.

The high qual ity, state o the art, automated manuacture o

the capacitor elements provides consistent quality to ensure

long term reliability and perormance. Due to the optimized

proportions o the mixed dielectric, the capacitor elements

are subject to low electrical stress with high stability under

extreme temperature variations.

CPB portfolio features

The port olio consists o three versions o Capacitor Voltage

Dividers (CVDs), light, medium and heavy, combined with two

sizes o Electromagnetic Units (EMU). The two sizes o EMU

comprise a medium size optimized in respect to market re-quirements or number o windings and perormance. A lighter

EMU is available where customers have lower burden require-

ments. The light capacitance CVD is manuactured up to 245

kV and can only be incorporated with the lightweight EMU.

This special cost eective combination is in this document

designated CPB(L).

Capacitor Voltage Divider

The capacitor voltage divider (CVD) consists o one or more

capacitor units, assembled on top o each other, with each

unit containing the required number o series-connected, oil-

insulated capacitor elements. The units are completely illedwith synthetic oil, hermetically sealed with stainless steel bel-

lows and incorporate o-ring seals throughout the design.

The design o the capacitive elements is consistent with

requirements o revenue metering, with the active component

o aluminum oils insulated with polypropylene ilm and paper

and impregnated with PCB ree synthetic oil. The synthetic oil

has superior and consistent insulating properties when com-

pared to mineral oil.

The automated processing o the capacitor un its urther

contributes to the long term high reliability and perormance

o the CPB.

Electromagnetic Unit (EMU)The voltage divider and the electromagnetic unit are connect-

ed by internal bushings, which is necessary or applications

with high accuracy.

The EMU has double-enamelled copper windings and an i ron

core assembled with high quality magnetic core steel and is

oil impregnated and mounted in a hermetically sealed alumi-

num tank with mineral oil illing.

The primary winding is divided into a main part , and a set o

externally adjustable connected trimming windings. The nomi-

nal intermediate voltage is approximately 22/3 kV.

The EMU incorporates an inductive reactor, connected in

series between the voltage divider and the high voltage end

o the primary winding to compensate or the shit in phase

angle caused by the capacitive reactance o the CVD. This

inductive reactance is tuned individually on each transormer

to achieve the required accuracy.

For special applications, such as HVDC stations, measure-

ment o harmonics, etc an alternative EMU is available without

a separate compensating reactor. For this special type o EMU

the unction o the compensating reactor and primary wind-ing o the intermediate transormer are combined into one

device. This arrangement gives additional advantages such as

a wider requency operating range and urther improvement in

the transient response. This special type o EMU is limited to

lower burden requirements.



Climate

These transormers are designed or, and are installed in

widely varying conditions, rom arctic to desert climates, on

every continent.

Ferro-resonance

The low induction, combined with an eic ient damping circuit,

gives a sae and stable damping o erro-resonance at all

requencies and voltages up to the rated voltage actor; see

page 40.

Life timeThe low voltage stress within the capacitor elements ensures

a sae product with an expected service lie o more than 30

years. The long term reliability and perormance is urther

ensured by the state o the art, automated manuacture and

processing o the capacitor elements and units.

Transient properties

The high intermediate voltage and high capacitance result in

good transient properties.

Adjustment

The adjustment windings or ratio adjustment are accessiblein the terminal box, under a sealed cover.

Power Line Carrier (PLC)

The CPB is designed with the compensating reactor connect-

ed on the high voltage side o the primary winding, providing

the option o using higher requencies (> 400 kHz) or power

line carrier transmission.

Stray capacitance

The design with the compensating reactor on the high voltage

side o the main winding ensures less than 200 pF stray ca-

pacitance, which is the most stringent requirement in the IECstandard or carrier properties.

Stability

The CPB has a high Quali ty Factor as a resul t o the compara-

tively high capacitance combined with the high intermediate

voltage. The Quality Factor = Cequivalent

x U2intermediate

is a mea-

sure o the accuracy stability and the transient response. The

higher this actor, the better the accuracy, and the better the

transient response.

Capacitor Voltage Divider

1 Expansion system

2 Capac ito r elements

3 Intermediate vol tage bushing

8 Primary terminal, lat 4-hole Al-pad

10 Low voltage terminal (or carrier requency use)

Electromagnetic unit

4 Oil level glass

5 Compensat ing reactor

6 Ferro-resonance damping circuit

7 Primary and secondary windings

9 Gas cushion

11 Secondary termina l box

12 Core

2

10

712

3

5

9

4

6

1

8

11



CCBDesign eatures and advantages

ABBs coupling capacitors are intended for connection

between phase and ground in networks with isolated or

grounded neutral.

Application

ABB oers a world-class coupling capacitor wi th superior

properties or PLC application as well as iltering and other

general capacitor applications. ABBs coupling capacitors

(designated CCB) are intended or connection between phase

and ground in high voltage networks with isolated or ground-

ed neutral.

The design corresponds to the requirements o IEC 60358-1

and all national standards based on this standard. Special

designs to meet other standards and customer speciications

are also available. Due to the design o the capacitor units,

described below, the coupling capacitor elements are com-

bining both low voltage stress and high stability to tempera-

ture variations.

CCB portfolio features

The port olio consists o three versions o coupl ing capacitors

(CCs), light, medium and heavy, o which the light capaci-

tance CC is manuactured up to 245 kV.

Capacitor design

The coupling capacitor consists o one up to our capacitor

units, assembled on top o each other. Each unit contains

a large number o series-connected, oil-insulated capacitor

elements. The units are completely illed with synthetic oil,

hermetically sealed with stainless steel bellows and incorpo-

rated o-ring seals are used throughout the design.

The capacitor insulators and elements are designed with

respect to the same demands as or the capacitor part o

revenue metering CVT and thus also share the same conser-

vative design philosophy. This conservative philosophy resultsin a design with low voltage stress that makes the coupling

capacitors capable o handling a voltage actor up to 1.9/8

hrs although this is not required by the IEC coupling capacitor

standard.

Thei r active component consists o aluminum oi l, insulated

with paper/polypropylene ilm, impregnated by a PCB-ree

synthetic oil which has better insulating properties than min-

eral oil and is a perect matching or the mixed dielectric. Due

to its proportions between paper and polypropylene ilm this

dielectric has proven itsel much more insensitive to tempera-

ture changes in contradiction to e.g. ull ilm capacitors.

The automated processing o the capacitor units urther contrib-

utes to the long term high reliability and perormance o the CCB.



Climate

These coupling capacitors are designed or being installed in

widely varying conditions, rom arctic to desert climates, on

every continent.

Life time

The low voltage stress within the capacitor elements ensures

a sae product with an expected service lie o more than 30

years.


The CCB are designed or use with in the entire power linecarrier transmission requency range rom 30 kHz to 500 kHz.

However, the light capacitance CCB 72 - 245 is not designed

or line trap on the top.

1

2

3

44

56

Coupling Capacitor CCB

1 Primary terminal, lat 4-hole Al-pad

2 Expansion system

3 Capacitor elements

4 Rating plate (For low capacitance CCB 72-245 its placed on the

expansion cover)

5 L- (low vol tage) terminal / Ground clamp

6 Support Insulators (mainly or PLC use)



For revenue metering and protection in high voltage

networks, the oil-paper insulated current transformer IMB

is the most sold transformer in the world.

Designed for widely shifting conditions, from polar to

desert climate

Flexible tank type design allows large and/or many

cores

The unique quartz filling minimizes the quantity of oil and

provides a mechanical support to the cores and primary

winding.Due to the low center of gravity the IMB is very suitable

for areas with high seismic activity.

From international studies we can see that the IMB design

is a reliable product (failure rate more than 4 times lower

than average) with no need for regular maintenance.

IMB 36-800 kVTank type current transormer

Brief performance data

Installation Outdoor

Design Tank (Hai rpin) type

Insulation Oil-paper-quartz

Highest voltage for equipment 36 - 800 kV

Max primary current Up to 4 000 A

Short-circuit current Up to 63 kA/1 sec

Insulators Porcelain

On request silicon rubber (SIR)

Creepage distance 25 mm/kV

(Longer on request)

Service conditions

Ambient temperatu re

Design altitude

-40 C to +40 C

(Others on request)

Maximum 1000 m

(Others on request)



Material

All external metal suraces are made o an a luminum alloy,

resistant to most known environment actors. Bolts, nuts,

etc. are made o acid-proo steel. The aluminum suraces do

not normally need painting. We can, however, oer anodized

aluminum or a protective paint.

Creepage distance

As standard, IMB is oered with creepage distance 25 mm/kV.

Longer creepage distance can be provided on request.

Mechanical stabilityThe mechanical stabi lity gives su icient saety margins or

normal wind loads and terminal orces. Static orce on primary

terminal may be up to 6 000 N in any direction. The IMB will

also withstand most cases o seismic stress.

Rating plates

Rating plates o stainless steel with engraved text and the wir-

ing diagram are mounted on the cover o the terminal box.

Transport - storage

The IMB 36 - 145 is normally transported (3-pack) and stored

vertically. I horizontal transport is required this must be statedon the order.

The IMB 170 - 800 is packed or horizontal transport (1-pack).

The transormer(s) must be stored on a lat and stable surace

with a suitable load capacity, and i possible, in its original

packaging.

For extended storage, the contact suraces should be pro-

tected rom corrosion. Beore placing in service, ensure that

all contact suraces are thoroughly cleaned.

I the transormer(s) is stored horizontally, under unavorableclimatic conditions, corrosion can occur on secondary termi-

nals and accessories in the terminal box due to drainage not

unctioning properly in the horizontal position. When stored

horizontally, the terminal box must be checked or conden-

sation and penetrating moisture. Beore long-term storage,

appropriate measures must be taken, such as connecting

heating elements, i available, or providing the terminal box

with silica gel or an equivalent drying agent. This applies or

storage o up to two years. For longer storage, up to ive

years, the transormer must be stored indoors or under roo.

The maximum time when stored in i ts orig inal crate wi thoutany protection is six months. I the transormer is stored pro-

tected, make sure the building is very well ventilated.

Make sure that the transormer(s) is put in vertical position at

least 48 h prior to energizing (96 h or 800 kV).

Arrival inspection - assembly

Please check the packaging and contents with regard to

transport damage on arrival. In the event o damage to the

goods, contact ABB or advice beore urther handling o the

goods. Any damage should be documented (photographed).

The transormer must be assembled on a lat surace. An un-

even surace can cause misalignment o the transormer, with

the risk o oil leakage.

Assembly instructions are provided with each delivery.

MaintenanceThe maintenance requirements are small , as IMB is hermeti-

cally sealed and designed or a service lie o more than 30

years. Normally it is suicient to check the oil level and that no

oil leakage has occurred. Tightening o the primary connec-

tions should be checked occasionally to avoid overheating.

A more detailed check is recommended ater 20-25 years o

service. A manual or conditional monitoring can be sup-

plied on request. This gives urther guarantees or continued

problem-ree operation.

The methods and the scope o the checks depend great ly onthe local conditions. Measurements o the dielectric losses o

the insulation (tan delta-measurement) and/or oil sampling or

dissolved gas analysis are recommended check methods.

Maintenance instructions are supplied with each delivery.

Oil sampling

This is normally done through the oil- ill ing terminal. I re-

quired, we (ABB, HV Components) can oer other solutions

and equipment or oil sampling.

Impregnation agentThe oil is according to IEC 60296 grade 2 and is ree o PCB

and other heavily toxic substances and has a low impact on

the environment.

Disposal

Ater separating the oil and quartz the oil can be burned in an

appropriate installation. Oil residue in the quartz can be burnt,

whereater the quartz can be deposited.

The disposal should be carried out in accordance with local

regulatory requirements.

The porcelain can, ater it has been crushed, be used aslandill.

The metals used in the t ransormer can be recycled. To recy-

cle the aluminum and copper in the windings, the oil-soaked

paper insulation should be burnt.




Primary terminals

IMB 36 800 is as standard equipped with aluminum bar

terminals, suitable or IEC and NEMA speciications. Other

customer speciic solutions can be quoted on request.

Maximum static and dynamic orce on the terminal is up to

6 000 and 8 400 N respectively, depending on type o IMB.

Maximum torsional moment is 1 000 Nm.

Secondary terminal box and secondary terminals

The transormer is equipped with a secondary terminal box,

protection class IP 55, according to IEC 60529. This box is

equipped with a detachable, undrilled gland plate, which on

installation can be drilled or cable bushings.

The terminal box is provided with a drain.

The standard terminal box can accommodate up to 30 (16)

terminals o the type Phoenix UK10N or cross section




Maximum continuous primary current and short-time current

Type Normal current Cooling flanges Cooler Maximum short-time

current 1 sec

Maximum short-time

current 3 sec

Maximum dynamic

current

A A A kA kA kA peak value

IMB 36-72 1) 1200 - - 40 31.5 108

IMB 36-72 1) 2000 - - 40 31.5 108

IMB 84-123 1) 720 - - 31.5 12.5 78.8

IMB 84-123 1) 1440 - - 40 31.5 108

IMB 36-170 2) 2400 - 3150 63 40 170

1200 - 1500 40 40 108

400 - - 31.5 18 85

150 - - 16 9 43IMB 245 2) 1600 - 2000 40 40 108

IMB 245 3) 2000 2400 3150 63 63 170

1000 1200 1500 40 40 108

300 - - 31.5 18 85

150 - - 16 9 45

IMB 300-420 3) 2500 - 3150 63 63 170

1200 - 1500 40 40 108

IMB 420-550 4, 5) 2500 - 4000 63 40 170

1200 - 2000 40 40 108

IMB 800 5) - - 4000 63 40 1701) Light tank, 2) Standard tank, 3) Heavy tank, 4) Octagon tank, 5) HV tank

Other types o primary conductors can be supplied on requestMaximum continuous primary current = load actor x primary rated current related to a daily mean temperature that does not exceed 35 C

Primary winding can be designed with reconnection alternative between two or three primary rated currents with a ratio o 2:1 or 4:2:1



Nominal flashover and creepage distance (Porcelain)

Normal creepage distance 25 mm/kV

(Min. values)

Long creepage distance 31 mm/kV

(Min. values)

Type Flashover

distance

Total creepage

distance

Protected creepage

distance

Flashover

distance

Total creepage

distance

Protected creepage

distance

mm mm mm mm mm mm

IMB 361) - - - 660 1813 800

IMB 361) - - - 635 1813 762

IMB 721) 660 1813 800 1005 3075 1300

IMB 721) 635 1813 762 980 3160 1307

IMB 841) - - - 1005 3075 1300

IMB 841)

- - - 980 3160 1307IMB 1231, 6) 1005 3075 1300 1215 3625 1600

IMB 1231) 980 3160 1307 1190 3880 1634

IMB 362) - - - 630 2248 1020

IMB 722) - - - 630 2248 1020

IMB 842) 630 2248 1020 - - -

IMB 1232) 1120 3625 1400 1120 4495 1860

IMB 1452) 1120 3625 1400 1120 4495 1860

IMB 1702) - - - 1330 5270 2200

IMB 1702, 7) - - - 1600 6525 2740

IMB 2452, 3) 1915 6740 2850 2265 8490 3685

IMB 3003) 2265 8250 3495 2715 10430 4645

IMB 3623) 2715 10430 4645 3115 12480 5630IMB 4203) 3115 12480 5630 3635 14325 6465

IMB 4204, 5) 3215 11550 4800 3820 15280 6870

IMB 5504, 5) 3820 15280 6870 4715 18944 8340

IMB 8005) 5520 20000 8405 - - -

1) Light tank, 2) Standard tank, 3) Heavy tank, 4) Octagon tank, 5) HV tank6) 25 mm/kV or 29 mm/kV or 123 kV system voltage.7) 38 mm/kV or 170 kV system voltage and 45 mm/kV or 145 kV system voltage is available.

Note: Long creepage distance eects dimensions A, B, D (see dimensions)




Test Voltages IEC 61869-2

Type Highest voltage for

equipment (Um)

AC voltage tes t,

1 minute, wet/dry

Lightning impulse

1.2/50 s

Switching impulse

250/2500 s

RIV test

voltage

Max RIV

level

kV kV kV kV kV Max. V

IMB 36 36 70/70 170 - - -

IMB 72 72.5 140/140 325 - - -

IMB 123 123 230/230 550 - 78 2500

IMB 145 145 275/275 650 - 92 2500

IMB 170 170 325/325 750 - 108 2500

IMB 245 245 460/460 1050 - 156 2500

IMB 300 300 -/460 1050 850 191 2500

IMB 362 362 -/510 1175 950 230 2500IMB 420 420 -/630 1425 1050 267 2500

IMB 550 550 -/680 1550 1175 334 2500

IMB 800 800 -/975 2100 1550 486 2500

Test voltages above applies at 1000 meters above sea level

Test Voltages IEEE C 57.13, RIV test values according to IEEE C 57.13.5

Type Highest system

voltage

Power frequency

applied voltage test

AC-test Wet,

10 sec

Lightning impulse

(BIL) 1.2/50 s

Chopped

impulse

RIV test

voltage

Max RIV

level1)

kV kV kV kV Max. kV kV V

IMB 36 36.5 70 70 200 230 - -

IMB 72 72.5 140 140 350 400 - -

IMB 123 123 230 230 550 630 71 200IMB 145 145 275 275 650 750 84 200

IMB 170 170 325 315 750 865 98 200

IMB 245 245 460 445 1050 1210 142 250

IMB 362 362 575 - 1300 1500 209 250

IMB 550 550 800 - 1800 2070 303 350

IMB 800 800 920 - 2050 2360 462 5001) Test procedure according to IEC. Test voltages above applies at 1000 meters above sea level



Burdens

Our current transormer IMB has a very lexible design allow-

ing large burdens. However, it is important to determine the

real power consumption o connected meters and relays in-

cluding the cables. Unnecessary high burdens are oten speci-

ied or modern equipment. Note that the accuracy or the

measuring core, according to IEC, can be outside the class

limit i the actual burden is below 25% o the rated burden.

Over-voltage protection across primary winding

The voltage drop across the primary winding o a current

transormer is normally very low. At rated primary current itis only a couple o volts and at short-circuit current a ew

hundred volts.

I a high requency current or voltage wave passes through

the primary winding can, due to the winding inductance,

high voltage drops occur. This is not dangerous or a current

transormer with a single-turn primary winding, but or multi-

turn primaries may it lead to dielectric puncture between the

primary turns.

It is thereore ABBs practice to protect the primary winding in

multi-turn designs with a surge arrester connected in parallel

with the primary.

Standard design o IMB current transormer is without surgearrester. Surge arrester o type POLIM C 1.8N will however

be included when needed.

Standard accuracy Classes.

Current transormers o the type IMB are designed to comply with the ollowing accuracy classes.

Other classes can be quoted on request.

IEC 61869-2 IEEE C57.13 / IEEE C57.13.6

Class Application Class Application

0.2 Precision revenue metering 0.15 Precision revenue metering

0.2S Precision revenue metering 0.15S Precision revenue metering0.5 Standard revenue metering 0.3 Standard revenue metering

0.5S Precision revenue metering 0.6 Metering

1.0 Industrial grade meters 1.2 Metering

3.0 Instruments C100 Protection

5.0 Instruments C200 Protection

5P Protection C400 Protection

5PR Protection C800 Protection

10P Protection X Protection

10PR Protection

PX Protection

PXR Protection

TPS Protection

TPX Protection

TPY Protection



IMB 36-800 kVDesign and shipping data

Dimensions

A B C D E F G H J K

Type Total

height

Height to

primary

terminal

Ground

level

height

Flashover

distance

Length across

primary terminal

bushing

Dimension of

bottom tank

Height to

terminal box

Spacing for

mounting holes

mm mm mm mm mm mm mm mm mm mm

IMB 36 1) 1718 1424 611 660 359 197.5 279 395 138 335

IMB 36 1) 1718 1424 636 635 359 197.5 279 395 138 335

IMB 72 1) 1718 1424 611 660 359 197.5 279 395 138 335

IMB 72 1) 1718 1424 636 635 359 197.5 279 395 138 335

IMB 84 1) 2063 1769 611 1005 359 197.5 279 395 138 335

IMB 841)

2063 1769 636 980 359 197.5 279 395 138 335IMB 123 1) 2063 1769 611 1005 359 197.5 279 395 138 335

IMB 123 1) 2063 1769 636 980 359 197.5 279 395 138 335

IMB 36 2) 2000 1635 840 630 470 235 335 595 110 410

IMB 72 2) 2000 1635 840 630 470 235 335 595 110 410

IMB 84 2) 2000 1635 840 630 470 235 335 595 110 410

IMB 123 2) 2490 2125 840 1120 470 235 335 595 110 410

IMB 145 2) 2490 2125 840 1120 470 235 335 595 110 410

IMB 170 2) 2700 2335 840 1330 470 235 335 595 110 410

IMB 245 2) 3320 2950 865 1915 440 235 335 595 110 410

IMB 245 3) 3640 3050 965 1915 440 270 370 750 475 450

IMB 300 3) 4150 3405 965 2265 490 270 370 750 475 450

IMB 362 3) 4600 3855 965 2715 490 270 370 750 475 450IMB 420 3) 5000 4255 965 3115 490 270 370 750 475 450

IMB 420 4) 5505 4760 1365 3215 490 320 380 1040 783 500

IMB 420 5) 5580 4790 1390 3215 526 360 410 1105 805 600

IMB 550 4) 6100 5360 1365 3820 490 320 380 1040 783 500

IMB 550 5) 6180 5390 1390 3820 526 360 410 1105 805 600

IMB 800 5) 8840 7090 1390 5520 526 360 410 1105 805 600

1) Light tank, 2) Standard tank, 3) Heavy tank, 4) Octagon tank, 5) HV tank



IMB 36 - 123 IMB 36 - 170

A

B

J2

0

G F

K

K

C

D

E

J

C

D

E

A

B

KH

K

K

G

F




IMB 245 2)IMB 245 1)

E

D

C

J

K

A

B

H

K

K

G

F

H

K

F

G

C

D

K

E

25

A

B

K

J



K

J

E

C

D

BA

K

F G

H

K

30

IMB 300 - 420 2) IMB 420 - 550 3)

C

D A

B

E

K K25

J

H

K

F

G




30

E

D

B

A

C

J

K K

KH

F G

IMB 420 - 550 4)



30

K

K

F G

H

E

C

B

D

A

K

J

IMB 800 4)




Changes, special design of dimensions

A, B , C A A A A

Tank-type Increased tank height Cooling flange Cooler Three primary ratios Horizontal transport

mm mm mm mm mm

Light tank - - - - 10

Standard tank 210 - 255 193 -

Heavy tank 210 or 420 210 35 / 240 *) - -

Octagon tank 150 - 440 - -

HV tank 200 or 400 - 400 **) - -

*) 35 mm or IMB 245, 240 mm or IMB 300 - 420**) 400 mm or IMB 420 - 550, IMB 800 is always equipped with cooler

Shipping data for standard IMB

Type Net weight incl. oil Oil Shipping weight Shipping dimensions Shipping volume

1-pack/3-pack 1-pack/3-pack 1-pack/3-pack

kg kg kg LxWxH m m3

IMB 36 1) 200 25 340 / 730 1.97x0.65x1.08 / 1.73x0.79x1.93 1.4 / 2.6

IMB 36 1) 240 26 380 / 850 1.97x0.65x1.08 / 1.73x0.79x1.93 1.4 / 2.6

IMB 72 1) 200 25 340 / 730 1.97x0.65x1.08 / 1.73x0.79x1.93 1.4 / 2.6

IMB 72 1) 240 26 380 / 850 1.97x0.65x1.08 / 1.73x0.79x1.93 1.4 / 2.6

IMB 84 1) 240 27 395 / 870 2.31x0.65x1.08 / 1.73x0.79x2.42 1.6 / 3.3

IMB 84 1) 290 28 445 / 1020 2.31x0.65x1.08 / 1.73x0.79x2.42 1.6 / 3.3

IMB 123 1) 240 27 395 / 870 2.31x0.65x1.08 / 1.73x0.79x2.42 1.6 / 3.3IMB 123 1) 290 28 445 / 1020 2.31x0.65x1.08 / 1.73x0.79x2.42 1.3 / 3.3

IMB 36 2) 420 45 530 / 1350 2.26x0.6x0.94 / 1.67x0.8x2.21 1.3 / 3

IMB 72 2) 420 45 530 / 1350 2.26x0.6x0.94 / 1.67x0.8x2.21 1.3 / 3

IMB 84 2) 420 45 530 / 1350 2.26x0.6x0.94 / 1.67x0.8x2.21 1.3 / 3

IMB 123 2) 490 50 620 / 1580 2.75x0.6x0.94 / 1.67x0.8x2.7 1.5 / 3.6

IMB 145 2) 490 50 620 / 1580 2.75x0.6x0.94 / 1.67x0.8x2.7 1.5 / 3.6

IMB 170 2) 550 55 700 / - 2.96x0.6x0.94 / - 1.7 / -

IMB 245 2) 750 80 970 / - 3.48x0.6x0.94 / - 2.0 / -

IMB 245 3) 1100 110 1460 / - 3.91x1.06x1.26 / - 5.2 / -

IMB 300 3) 1400 170 1815 / - 4.5x1.06x1.26 / - 5.2 / -

IMB 362 3) 1500 180 1915 / - 4.7x1.06x1.26 / - 6.3 / -

IMB 420 3) 1600 190 2050 / - 5.1x1.05x1.31 / - 7.0 / -

IMB 420 4) 2500 300 3120 / - 5.82x1.23x1.22 / - 8.8 / -

IMB 420 4) 2600 290 3220 / - 5.74x1.06x1.47 / - 9.0 / -

IMB 550 4) 2800 330 3480 / - 6.42x1.23x1.22 / - 9.7 / -

IMB 550 5) 3500 510 4180 / - 6.34x1.06x1.47 / - 9.9 / -

IMB 800 5) 4200 670 6400 / - 8.71x1.06x1.47 / - 13.5 / -1) Light tank2) Standard tank3) Heavy tank4) Octagon tank5) HV tank

IMB 36 - 145 is normally packed or vertical transport in a 3-pack.

Vert ical transport in a 1-pack can be quoted on request.

IMB 170 - 800 is always packed or horizontal transport in 1-pack.

Additional weights

Weight indicated in table above is or standard IMB.

Additional weights may occur depending on requirements and coniguration.



IMB 36-800 kVReconnection

General

The current t ransormer can be reconnected to adapt or vary-

ing currents. The IMB type can be delivered in a coniguration

that permits reconnection either on primary or secondary side,

or a combination o the two.

Connection above is for the lower current Connection above is for the higher current

The unused taps on the reconnectable secondary winding

must be let open.

I windings/cores are not used in a current transormer they

must be short-circuited between the highest ratio taps (e.g.

S1 - S5) and shall be grounded.

Secondary reconnection

Two primary ratios for two turns Two primary ratios, connected for one turn

C2C1C2

C1

P1 P2

S1 S5S4S3S2

Caution!

Never leave an unused secondary winding open.

Very high-induced voltages are generated across the

terminals and both the user and the transormer are

subjected to danger.

Primary reconnection

The advantage o pr imary reconnection is that the ampere-

turns remains the same and thereby the output (VA). The dis-

advantage is that the short-circuit capability may be reduced

or the lower ratio(s).



EMF 52-170 kVInductive voltage transormer

For revenue metering and protection in high voltage

networks, the oil-paper insulated voltage transformer

EMF is the most sold inductive voltage transformer in the

world.

Designed for widely shifting conditions, from polar to

desert climate.

Low flux in the core at operating voltage gives a wide

safety margin against saturation and ferro-resonance.

The unique quartz filling minimizes the quantity of oil and

allows a simple and reliable expansion system.



Design Inductive type

Insulation Oil-paper-quartz


Voltage fac tor (Vf) Up to 1.9/8 hrs

Insulators Porcelain

On request silicon rubber (SIR)

Creepage distance 25 mm/kV

(Longer on request)

Service conditions


Design altitude

-40 C to +40 C

(Others on request)

Maximum 1000 m

(Others on request)



EMF 52-170 kVInductive voltage transormer

Material

EMF 52-170: All external metal suraces are made o an

aluminum alloy, resistant to most known environment actors.

Bolts, nuts, etc. are made o acid-proo steel. The aluminum

suraces do not normally need painting. We can, however, o-

er a protective paint or anodized aluminum.

Creepage distance

EMF is available as standard with normal or long creepage

distances according to the table on page 36. Longer creep-

age distances can be quoted on request.

Mechanical stability

The mechanical stabi lity gives a suic ient saety margin or

normal wind loads and stress rom conductors. EMF can also

withstand high seismic orces.

Rating plates

Rating plates o stainless steel, with engraved text and wiring

diagrams are mounted on the transormer enclosure.

Transport - storage

The EMF 52-84 is always transported (3-pack) and stored

vertically.

The EMF 123-170 is normal ly t ransported (3-pack) and stored

vertically. I horizontal transport is required this must be stated

on the order.



packaging.




I the transormer(s) is stored horizontally (only EMF 123-170),

under unavorable climatic conditions, corrosion can occur on

secondary terminals and accessories in the terminal box due

to drainage not unctioning properly in the horizontal position.

When stored horizontally, the terminal box must be checked

or condensation and penetrating moisture. Beore long-term

storage, appropriate measures must be taken, such as con-

necting heating elements, i available, or providing the terminal

box with silica gel or an equivalent drying agent. This applies

or storage o up to two years. For longer storage, up to ive

years, the transormer must be stored indoors or under roo.

The maximum time when stored in i ts orig inal crate wi thout

any protection is six months. I the transormer is stored pro-

tected, make sure the building is very well ventilated.

Make sure that the transormer(s) is put in vertical position at

least 48 h prior to energizing.

Arrival inspection - assembly

Please check the packaging and contents with regard to

transport damage on arrival. In the event o damage to the

goods, contact ABB or advice, beore urther handling o the

goods. Any damage should be documented (photographed).

The transormer must be assembled on a lat surace. An un-

even surace can cause misalignment o the transormer, with

the risk o oil leakage.Assembly instructions are provided with each delivery.

Maintenance

Maintenance requirements are insigniicant as EMF is de-

signed or a service lie o more than 30 years.

Normally it is only necessary to check that the oil level is cor-

rect, and that no oil leakage has occurred. The transormers are

hermetically sealed and thereore require no other inspection.

A comprehensive inspection is recommended ater 30 years.

This provides increased saety and cont inued problem-reeoperation. The inspection methods and scope very signiicant-

ly depending on the local conditions. As the primary winding

is not capacitive graded, the measurement o tan-delta gives

no signiicant result. Thereore oil sampling or dissolved gas

analysis is recommended or checking the insulation.

Maintenance instructions are supplied with each delivery.

ABB, High Voltage Products is at your disposal or discus-

sions and advice.

Impregnation agent

The oil is according to IEC 60296 grade 2 and is ree o PCBand other heavily toxic substances and has a low impact on

the environment.

Disposal

Ater separating the oil and quartz the oil can be burned in an

appropriate installation. Oil residue in the quartz can be burnt,

whereater the quartz can be deposited.

The disposal should be carried out in accordance with local

regulatory requirements.

The porcelain can, ater it has been crushed, be used as

landill.The metals used in the t ransormer can be recycled. To recy-

cle the copper in the windings, the oil-soaked paper insulation

should be burnt.



Primary terminals

EMF 52-170 is as standard equipped with an aluminum bar

terminal, suitable or IEC and NEMA speciications.

The primary terminal is a voltage terminal and should thereore,

according to standards, withstand static orce o 1 000 N or Um

(system voltage) 123 170 kV and 500 N or lower voltages.

Withstand dynamic orce is 1 400 and 700 N respectively.

Secondary terminal box and

Secondary terminals

The terminal box or the secondary winding terminal is mounted

on the transormer enclosure. As standard the terminal box is

manuactured o corrosion resistant, cast aluminum.

This box is equipped with a detachable, undr illed gland plate,

which on installation can be drilled or cable bushings. It can, on

request, be quoted with cable glands according to the custom-

ers speciication.

The terminal box is provided with a drain.

EMF 52-170: Secondary terminals accept wires with cross-

sections up to 10 mm2.

Protection class or the terminal box is IP 55.

Ground (Earth) connections

The transormer is normally equipped with a ground terminal

with a clamp o nickel-plated brass.

For conductors =5-16 mm (area 20-200 mm2), see the igure.

A stain less stee l bar, 80 x 145 x 8 mm, can be quoted on

request. The bar can be supplied drilled according to IEC or

NEMA standards.

Grounding o the secondary circuits is made inside the terminal

box.

EMF 52-170

EMF 52-84 EMF 123-170

EMF 52-84

EMF 123-170



EMF 52-170 kVDesign data

Nominal flash-over and creepage distance

Normal porcela in (min. nom. va lues) Porce lain with long c reepage distance (min . nom. values)

Type Flash-over

distance

Creepage

distance

Protected creepage

distance

Flash-over

distance

Creepage

distance

Protected creepage

distance

mm mm mm mm mm mm

EMF 52 630 2248 1020

Others on request.

Normally insulator or the nearest higher voltage.

EMF 72 630 2248 1020

EMF 84 630 2248 1020

EMF 123 1200 3625 1400

EMF 145 1200 3625 1400

EMF 170 1330 5270 2200

Test voltages IEC 61869-3, (SS-EN 60044-2)

Type Highest voltage for

equipment

(Um)

1 min

wet/dry

LIWL

1.2/50 s

RIV test

voltage

RIV level

kV kV kV kV Max. V

EMF 52 52 95 250 30 125

EMF 72 72.5 140 325 46 125

EMF 84 84 150 380 54 125

EMF 123 123 230 550 78 2500

EMF 145 145 275 650 92 2500

EMF 170 170 325 750 108 2500Test voltages above are valid or altit udes 1000 meters above sea level.

Test voltages IEEE C 57.13 (CAN/CSA 60044-2)

Type Highest voltage for equipment

(Um)

AC test

dry, 1 min

AC test

wet, 10 sec

BIL

1.2/50 s

kV kV kV kV Max.

EMF 52 52 95 95 250

EMF 72 72.5 140 175 350

EMF 123 121 (123) 230 230 550

EMF 145 145 275 275 650

EMF 170 169 (170) 325 315 (325) 750

Values wi thin bracke ts reer to CAN/CSA 60044-2. Test voltages above are valid or altitudes 1000 meters above sea level.



Secondary voltages and burdens according to IEC

Standards

International IEC 61869-3

Swedish Standard SS-EN 60044-2

All nationa l standards based on IEC

Rated data at 50 or 60 Hz, Voltage factor 1.5 or 1.9

The transormer normally has one or two windings or cont inu-

ous load and one residual voltage winding.

Other conigurations can be quoted according to require-

ments.

Standard accuracy classes and burdens

According to IEC

50 VA class 0.2 100 VA class 3P



For lower or higher burdens please contact us.

The standards state as standard values for rated voltage factor 1.5/30 sec.

for effectively earthed systems, 1.9/30 sec. for systems without effective

earthing with automatic earth fault tripping and 1.9/8 hrs for systems with

insulated neutral point without automatic earth fault tripping.Since the residual voltage winding is not loaded except dur-

ing a ault, the eect o its load on the accuracy o the other

windings is disregarded in accordance with IEC.

Please note that modern meters and protection

require much lower burdens than those above, and

to achieve best accuracy you should avoid speciying

burdens higher than necessary; see page 6.

Secondary voltages and burdens according to IEEE and

CAN

Standards

Amer ican IEEE C57.13-2008

Canadian CAN/CSA 60044-2

Rated data at 60 Hz, Voltage factor 1.4

The transormer normally has one or two secondary windings

or continuous load (Y-connected).

Example o turns ratios:

350-600:1 means one secondary winding with the ratio 350:1

and one tertiary winding ratio 600:1350/600:1:1 means one secondary winding and one tertiary

winding both with taps or ratios 350:1 and 600:1

Protective classes according to CAN/CSA (1P, 2P, 3P) can be

quoted on request.

Voltage actor 1.9 according to CAN/CSA can be quoted on

request.

Standard accuracy classes and burdens

According to IEEE and CAN/CSA

0.3 WXY 0.6 WXYZ 1.2/3P WXYZ

For lower or higher burdens please contact us.

Rated burdens:

W = 12.5 VA power actor 0.1

X = 25 VA power actor 0.7

Y = 75 VA power actor 0.85

YY = 150 VA power actor 0.85Z = 200 VA power actor 0.85

ZZ = 400 VA power actor 0.85



EMF 52-170 kVDesign data

Voltage transformers EMF

A B C D E F

Type Total

height

Flash-over

distance

Height to

terminal box

Fixing hole

dimensions

Ground level

height

Expansion

vessel diameter

mm mm mm mm mm mm

EMF 52 1464 630 114 335 x 335 540 324

EMF 72 1464 630 114 335 x 335 540 324

EMF 84 1464 630 114 335 x 335 540 324

EMF 123 2360 1200 65 410 x 410 760 416

EMF 145 2360 1200 65 410 x 410 760 416

EMF 170 2490 1330 65 410 x 410 760 416

EMF 52-84

Note: Primary terminal will be mounted at site

EMF 123-170

Note: Primary terminal will be mounted at site

A

B

E

C

D

F

135

D

20

C

B

E

D20

A

D

F

135



EMF 52-170 kVShipping data

Voltage transformers EMF (Vertical 3-pack)


Porcelain insulator 3-pack 3-pack, L x W x H 3-pack

kg kg kg m m3

EMF 52 300 40 1040 1.6 x 0.9 x 1.7 2.5

EMF 72 300 40 1040 1.6 x 0.9 x 1.7 2.5

EMF 84 300 40 1040 1.6 x 0.9 x 1.7 2.5

EMF 123 570 80 1975 2.0 x 1.0 x 2.6 5.2

EMF 145 570 80 1975 2.0 x 1.0 x 2.6 5.2

EMF 170 610 83 2130 2.0 x 1.0 x 2.7 5.4

EMF 52 - 84 must not be tilted more than 60 during transport and storage.

EMF 123 - 170 is normally packed or vertical transport (3-pack). However, it can be transported in a horizontal position and is

available on request or horizontal transport (1-pack).

Voltage transformers EMF (Horizontal 1-pack)


Porcelain insulator 1-pack 1-pack, L x W x H 1-pack

kg kg kg m m3

EMF 123 570 80 720 2.7 x 0.8 x1.1 2.0

EMF 145 570 80 720 2.8 x 0.8 x 1.1 2.1EMF 170 610 83 765 2.8 x 0.8 x 1.1 2.1

EMF 170 1) 670 86 810 3.1 x 0.8 x 1.1 2.21) Insulator with long creepage distance.



CPB 72-800 kVCapacitor voltage transormer

The CPB is designed for revenue metering and protection

in high voltage networks.

The high quality, state of the art, automated manufacture

of the capacitor elements provides consistent quality

to ensure long term reliability and performance. Due to

the optimized proportions of the mixed dielectric the

capacitor elements are subject to low electrical stress

with high stability under extreme temperature variations.

The CPB is designed for a wide range of shifting

conditions including polar and desert climates.



Design Capacitor type, complies with IEC

Insulation

CVD

EMU

Aluminum-oi l / paper /

polypropylene-ilm, synthetic oil

Paper - mineral oil


Voltage fac tor (Vf) Up to 1.9/8 hrs

Insulators Porcelain / Silicon rubber (SIR)

Creepage distance 25 mm/kV (Longer on request)

Service conditions


Design altitude

-40 C to +40 C (Other on request)

Maximum 1 000 m(Other altitude on request)



Material

All external metal suraces are made o an a luminum alloy,

resistant to most known environment actors. Bolts, nuts, etc.

are made o acid-proo stainless steel. The aluminum suraces

do not normally need painting. We can however oer anodiza-

tion or protective paint, (normally light gray).

Creepage distance

As standard the CPB is oered with creepage distance

25 mm/kV. Longer creepage distances can be oered on

request.

Silicone Rubber Insulators

The complete CPB range is available with silicone rubber

insulators. Our SIR insulators are produced with a patented

helical extrusion molding technique, which gives completely

joint-ree insulators wi th outstanding perormance. All CVTs

with this type o insulators have the same high creepage dis-

tance, 25 mm/kV phase-phase, as porcelain.

Mechanical stability

The mechanical stabi lity gives su icient saety margin or

normal wind loads and conductor orces. For all combinations

except CPB(L), it is possible to mount line traps on top o thecapacitor divider. The CPB will also withstand most cases o

seismic stress.

Ferroresonance damping circuit

All CVTs need to incorporate some kind o erro-resonance

damping, since the capacitance in the voltage divider, in

series with the inductance o the transormer and the series

reactor, constitutes a tuned resonance circuit.

This circuit can be brought into resonance, that may saturate

the iron core o the transormer by various disturbances in

the network. This phenomenon can also overheat the electro-magnetic unit, or lead to insulation breakdown.

The CPB use a damping ci rcuit, connected in parallel with

one o the secondary windings (see diagram on page 51). The

damping circuit consists o a reactor with an iron core, and

an oil-cooled resistor in series. Under normal use, the iron

core o the damping reactor is not saturated, yielding a high

impedance, so that practically no current is lowing through

this circuit.

The damping circuit has two bridged terminals; d1- d2, be-

hind a sealed covering hood in the terminal box. In particular

cases, and ater agreement, this bridge can be opened, to

check that the circuit is intact, by resistance measurement.

Ratio adjustment

The transormer o the electromagnetic unit has ive adjust-

ment windings on the earth side o the primary winding. The

numbers o turns o these windings have been chosen so that

the ratio can be adjusted 6.05% in steps o 0.05%. These

windings are externally accessible, behind a sealed cover-

ing hood in the secondary terminal box. The CVT is deliveredadjusted or a speciied burden and class, and normally no

urther adjustment is necessary.

I needed, the adjustment windings enable exchange o the

voltage divider on site, and readjustment o the transormer

or the new combination o voltage divider/electromagnetic

unit.

Rating plates

Corrosion resistant rating plates with text and wiring diagrams

are used. General data can be ound on the door o the termi-

nal box, connection diagrams and secondary winding data onthe inside.

Each capacitor unit is marked with measured capacitance at

the top.

Potential Grounding Switch

A potential grounding switch can be included in the EMU.


As an option al l CVTs can be equipped with Carr ier Acces-

sories. Modern PLC equipment are adapted or a wide range

o coupling capacitors. No speciic capacitance is required.Only minimum capacitance must be speciied due to choice o

requency.

CPB 72-800 kVCapacitor voltage transormer



Standard terminal box

The transformer can also be equipped with larger

terminal box with space for power line carrier equipment.

Primary terminal

The CPB is normally delivered with a lat 4-hole a luminum pad,

suitable or bolts with C-C rom 40 to 50 mm and or connecting

normal aluminum cable clamps.

Other primary terminals can be oered on request, such as a

round aluminum studs, =30 mm.

Test orces at the primary terminal as per IEC 61869-5

Highest voltage for

equipment Um (kV)

Static withstand test load FR

(N)

CPB(L) CPB

72.5 to 100 500 2500123 to 170 1000 3000

245 1250 2500

300 to 362 - 1250

420 - 1500

Secondary terminal box and secondary terminals

The transormer is equipped with a secondary terminal box,

protection class IP 55. This box is equipped with a detachable,

undrilled gland plate, which on installation can be drilled or cable

bushings. It is also provided with a drain. The terminal box can

also be equipped with uses or micro circuit breakers.

The secondary terminals normally consist o Phoenix UK10N

standard terminal blocks or wire cross-section 10 mm.

In the terminal box are also terminals (d1-d2) or damping circuit,

terminals or the adjustment windings (B1 to B11) and the capac-

itor low voltage terminal L (or power line carrier equipment).

Terminals d1 - d2 and B1 - B11 are intended or actory sett ings

and thus located behind a sealed covering hood to prevent inad-

vertent reconnection.

The L terminal must always be grounded i no

carrier equipment is connected.

Ground terminals

The transormer is normally equipped with a ground clamp wi th a

cap o nickel-plated brass or IEC conductors 8 16 mm

(area 50 200 mm2) and or ANSI conductors # 2 SOL to 500

MCM, which can be moved to either mounting oot.

A stainless steel bar, 80 x 145 x 8 mm, can be quoted on request.

The bar can be supplied drilled according to IEC or NEMA standards.

Grounding terminals or the secondary circuits are placed inside

the terminal box.

14

40

50

135

40

20

75100



Unpacking

Please check the crates and their contents or damage during

transportation upon receipt. Should there be any damage,

please contact ABB or advice beore the goods are handled

urther. Any damage should be documented (photographed).

Storage

The ollowing have to be considered during storage:



packaging.




I the transormer(s) is stored horizontally, under unavorable

climatic conditions, corrosion can occur on

Documents

Buyers Guide Oil Insulated Outdoor Instrument Transformers Ed 7 En