ABB - IMZ Prospect

CURRENT TRANSFORMERStype IMZ 10

Catalogue card A29/16/00/E

ABB Power Distribution

APPLICATIONThe cast − resin insulated, single−phase, supporting current transformers type IMZ 10 are intended for supplyingmeasuring instruments and protective circuits of electrical power devices with maximum operating voltage of the powernetwork up to 12 kV and frequency 50 Hz.The range of rated primary currents: 5 ÷ 1500 A and 2 × 15 ÷ 2 × 600 A.Version with one, two or three cores.

CHARACTERISTICS− small overall dimensions,− the width of transformer, which enables the installation with distance between phases t =150 mm,− all of mounting dimensions enable the interchangeability of transformers of this type with other transformers

manufactured by well−known firms,− the reliability of operation.

OPERATING CONDITIONSThe current transformers type IMZ 10 are designed for operation in indoor equipment, in temperate and tropical climateconditions, and in aggressive environmental conditions. Thanks to the increased impulse test voltage strength and tothe increased rated thermal strength the current transformers type IMZ 10 are able to operate at altitudes up to 2600 mabove sea level. Long−duration thermal current and limits of deviations of transformers in class of accuracy 0,5 corre−spond to extended current range for 120% × Ipn. The lowest permissible temperature during transportation and storageamounts to 218 K (−55oC). The current transformers type IMZ 10 are designed for operation at temperatures from 268 K(−5oC) to 313 K (+40oC).

DESIGN AND PRINCIPLE OF OPERATIONThe cast − resin insulated current transformers type IMZ 10 are single−phase, low power transformers, operating inquasi short−circuit conditions, transforming the primary current flowing through the high voltage circuit to the secondarycurrent at low potential with the accuracy according to their class.The basic structural components of the current transformers are: primary winding, secondary winding or windings,magnetic core and steel base. The primary winding is cast in epoxy−resin mixture. The resinous casting constitutes themain insulation of the transformer. The secondary windings, wound on the insulating spools, are placed together with themagnetic cores in the window of the resinous casting. The steel base is screwed down to the resinous casting. There isthe terminal box in the base, in which there are installed the terminal plates with the leads of secondary windingsconnected to them. The grounding of no matter which of the terminals of secondary winding is made by screwing in abolt, which is present in a small foil bag placed in the terminal box.We deliver, on Customer’s request, the cover for current transformers with two and three cores, which enables thesealing of the terminals of measuring windings only.

COMPLIANCE WITH STANDARDS− PN−IEC 185− IEC 185− GOST 7746 − 89− VDE 0414/12.70

THE EXAMPLE OF ORDERThe current transformer type IMZ 10, 2 × 100/5/5 A/A/A, Ith = 200 × Ipn

I core:10 VA, class 0,5; FS 10II core: 5 VA, 10 P 10

WARRANTYThe factory warranty is twenty four months since the day of putting the apparatus into operation, but not longer thanthirty six months since the date of purchase.

TECHNICAL DATA

The approximate mass of current transformer type IMZ 10 amounts to 24 kg.

IMZ 10 1210 50 60 150 2,5 × Ith

kAkAkAHzkVkV

28

kV

75

kV

Type

Maximumpermissiblevoltage of

transformer

Ratedvoltage

Rated test votage ofinsulation

powerfrequency lightning dynamic thermal

(1− sec.)

Ratedfrequency

Maximum short−time current

Ratedshort−time dynamic current

The first windings The second windings The third windings1S1 − 1S2 2S1 − 2S2 3S1 − 3S2(S1 − S2)

10VA cl.0,5 FS10

15VA cl.0,5 FS10

30VA cl.0,5 FS10

45VA cl.0,5 FS10

10VA 10P10

15VA 10P10

20VA 10P10

30VA 10P10

45VA 10P10

10VA cl.0,5 FS10 5VA 10P10

10VA cl.0,5 FS10 10VA 10P10

10VA cl.0,5 FS10 15VA 10P10

15VA cl.0,5 FS10 15VA 10P10

15VA cl.0,5 FS10 20VA 10P10

15VA cl.0,5 FS10 30VA 10P10

30VA cl.0,5 FS10 30VA 10P10

30VA cl.0,5 FS10 45VA 10P10

5VA cl.0,5 FS10 5VA 10P10 5VA 10P10

10VA cl.0,5 FS10 5VA 10P10 10VA 10P10

10VA cl.0,5 FS10 10VA 10P10 15VA 10P10

10VA cl.0,5 FS10 15VA 10P10 15VA 10P10

15VA cl.0,5 FS10 5VA 10P10 5VA 10P10

15VA cl.0,5 FS10 10VA 10P10 10VA 10P10

15VA cl.0,5 FS10 10VA 10P10 15VA 10P10

15VA cl.0,5 FS10 15VA 10P10 15VA 10P10

30VA cl.0,5 FS10 15VA 10P10 15VA 10P10

The switchable current transformers

A kA kA kA kA2x1 0,1−0,2 0,2−0,4 0,3−0,6 0,5−1

2x2 0,2−0,4 0,4−0,8 0,6−1,2 1−22x5 0,5−1 1−2 1,5−3 2,5−52x10 1−2 2−4 3−62x15 1,5−3 3−6 7,5−15

2x20 2−4 4−8 6−12 10−202x25 2,5−5 5−10 7,5−15 12,5−252x30 3−6 6−12 9−18 15−30

2x40 4−8 12−242x50 5−10 10−20 15−30 25−502x60 6−12 12−24

2x75 7,5−15 15−30 22,5−40 37,5−402x100 10−20 20−40 30−402x120 12−242x125 37,5−40

2x150 15−30 30−40 40−402x200 20−40 40−402x250 25−40 40−40

2x300 30−40 40−402x400 40−402x500 40−40

2x600 40−40

Rated primarycurrent

Ipn

Rated short−time thermal current (1 − sec.) Ith

100×Ipn 200×Ipn 300×Ipn 500×Ipn

A kA kA kA kA1 0,1 0,2 0,3 0,5

2 0,2 0,4 0,6 15 0,5 1 1,5 2,510 1 2 3

15 1,5 3 7,520 2 4 6 1025 2,5 5 7,5 12,530 3 6 9 15

40 4 8 12 2050 5 10 15 2560 6 12 18 30

75 7,5 15 22,5 37,580 8 24

100 10 20 30 40

120 12 24125 37,5150 15 30 40 40200 20 40 40

250 25 40300 30 40 60400 40 60

500 40 60600 40 60750 40

800 601000 601200 60

1500 60


Ipn


The not switchable current transformers

Parameters related to primary circuit

Range of production

Rated short−time thermalcurrent (1 − sec.) Ith

100×Ipn 200×Ipn 300×Ipn 500×Ipn

1 co

re2

core

s3

core

s

Parameters of secondary windingsversion not recommended

version recommended

impossible to make

* except Ipn = 800; 2×400 [A]** except Ipn = 1; 5; 25; 50; 800; 1000; 2×1; 2×5; 2×25;

2×50; 2×250; 2×400; 2×500 [A]

***

*

*****

Ver

sion

100×Ipn 200×Ipn 300×Ipn 500×Ipn

Rated secondary current Isn = 5 [A]


Parameters of secondary windings

Minimum installation distances for current transformerstype IMZ 10 in consideration of test voltage

Publ

icat

ion

04.2

000

Manufacturer reserves for itself the right to train the changes resulting from the technological progress.

DIMENSIONAL DRAWING


APPLICATIONThe cast−resin insulated single phase, supporting current transformers type IMZ 15 are intended for supplying mea−suring instruments and protective circuits of electrical power devices with the maximum permissible voltage of thepower network up to 17,5 kV and frequency 50 Hz.The range of rated primary currents: 5 ÷ 1500 A and 2 × 15 ÷ 2 × 600 A.

CHARACTERISTICS− small overall dimensions,− the width of the transformer enables its installation with the distance between phases t = 150 mm,− all of mounting dimensions enable the interchangeability of these transformers with the transformers of such kind

manufactured by other well−known firms, producers of current transformers,− very low level of partial discharges ensures the durability of insulation and the reliability of operation.

OPERATING CONDITIONSThe current transformers type IMZ 15 are designed for operation in indoor equipment, in temperate and tropicalclimate conditions, and in aggressive environmental conditions. Thanks to the increased impulse test voltage strengthand to the increased rated thermal strength the current transformers type IMZ 15 can operate at altitudes up to2600 m above sea level. The long−duration thermal current and the limits of errors of the transformers in class ofaccuracy 0,5 correspond to the extended current range for 120% × Ipn. The current transformers type IMZ 15 aredesigned for operation at temperatures from 268 K (−5oC) to 313 K (+40oC). The lowest permissible temperatureduring transportation and storage is 218 K (−55oC).

DESIGN AND PRINCIPLE OF OPERATIONThe cast−resin insulated current transformers type IMZ 15 are the single−phase, low power transformers working inconditions close to the short−circuit state, transforming the primary current flowing trough the high voltage circuit intothe secondary current of low potential with the accuracy according to their class. The basic structural components ofthe current transformers are: the primary winding, the secondary winding or windings, the magnetic core and thesteel base. The primary winding is cast in epoxy − resin mixture. The resinous casting makes the main insulation of thetransformer. The secondary windings, wound on the insulating spools are placed together with the magnetic cores inthe window of the resinous casting. The steel base is screwed down to the resinous casting. There is the terminal boxin the base, in which there are installed the terminal plates with the leads of secondary windings connected to them.

COMPLIANCE WITH STANDARDS− PN−IEC 185 + A1:1994− IEC 185− DIN/VDE 0414 Teil 1/01.94− GOST 7746−89

THE EXAMPLE OF ORDER:The current transformer type IMZ 15; 2 × 10/5/5 A/A/A; Ith = 200 × Ipn

I core: 10 VA; class 0,5; FS10II core: 5 VA; 10P10

WARRANTYThe factory grants 24 months of warranty since the day of putting the apparatus into operation, but no longer than 36months since the date of sale.

ADDITIONAL INFORMATIONThe secondary terminals of measuring windings of the currnet transformers type IMZ 15 can be sealed separately.

TECHNICAL DATA

IMZ 15 17,5 50 60 150 2,5 × Ith

kAkAkAHzkV

38

kV

95

kV

Type


transformer



(1− sec.)

Ratedfrequency


Ratedshort−time dynamic current

The approximate mass of current transformer type IMZ15 amounts to 24 kg.


PARAMETERS RELATED TO PRIMARY CIRCUIT

100×Ipn 200×Ipn 300×Ipn

15VA cl. 0,5 FS10

1 core30VA cl. 0,5 FS10

30 VA 10P10

45VA 10P10

10VA cl. 0,5 FS10 5VA 10P10

2 cores 10VA cl. 0,5 FS10 10VA cl. 0,5 FS10

15VA cl. 0,5 FS10 30VA 10P10

3 cores 15VA cl. 0,5 FS10 15VA 10P10 15VA 10P10

Version

Parameters of secondary windings Range of production


The firstwindings

1S1 − 1S2(S1 − S2)

The secondwindings

2S1 − 2S2

The thirdwindings

3S1 − 3S2

Rat

ed s

econ

dary

cur

rent

I sn =

5 A

Range of catalogue productionexcept Ipn = 1; 5; 25; 50; 800; 1000; 2×1; 2×5; 2×50; 2×250; 2×400; 2×500 A*

*

Note: There is a possibility making the transformer with parameters relating to current circuit and with parametersof secondary windings the same like in the transformers IMZ10.


100×Ipn 200×Ipn 300×Ipn

A kA kA kA5 0,5 1 1,510 1 2 315 1,5 320 2 4 630 3 650 5 10 1575 7,5 15

100 10 20 30150 15 30200 20 40 40300 30 40400 40600 40800 60

1000 601200 601500 60



Ipn


100×Ipn 200×Ipn 300×Ipn

A kA kA kA

2×15 1,5−3 3−6

2×50 5−10 10−20 15−30

2×75 7,5−15 15−30

2×100 10−20 20−40 30−40

2×150 15−30 30−40

2×200 20−40

2×300 30−40

2×400 40−40

2×600 40−40



Ipn

Minimum installation distances forthe current transformers type IMZ 15

The current circuit for the transformerstype IMZ 15 (for type tests)

Notes:

1. Steel base.2. Insulating housing.3. Plastic cover.4. Standardised machine elements: Fe−Zn 12 µm.5. For switchable transformers only.6. Union pieces: brass for version N3, Cu−Ni 10 µm for version T3

(for Ith>30/60 kA: Cu for version N3, Cu−Ni 10 µm for version T3).7. Fasteners: Cu−Ni 10 µm.8. For version N3 − mandrels M8 and standardised machine elements M8:

Fe−(Cu 3 µm + Sn 10 µm).For version T3 − mandrels M8:Fe−(Cu 10 µm + Ni 5 µm + Cr 0.3 µm).

− spring washers: as for version N3.− remaining standardised machine elements brass−Ni 10 µm.

9. For version N3 − bolt M12 and standardised machine elements M12:Fe−(Cu 3 µm + Sn 10 µm).

For version T3 − bolt M12 and standardised machine elements M12:Fe−(Cu 10 µm + Ni 5 µm + Cr 0.3 µm).

− spring washers: as for version N3.− remaining standardised machine elements

brass−(Cu−Ni 5 µm).10. Primary terminals: brass for version N3, brass−Ni 10 µm for version T3 (for cooper

terminals: Cu for version N3, Cu−Ni 10 µm for version T3).11. Secondary terminals: brass−Ni 10 µm.

Standardised machine elements M6: spring washer: Fe−(Cu 3 µm+Sn 10 µm).Remaining standardised machine elements: brass−Ni 10 µm).

Publ

icat

ion

04.2

000


APPLICATIONThe cast − resin insulated, single−phase, supporting current transformers type IMZ 20 are intended for supplyingmeasuring instruments and protective circuits of electrical power devices with maximum operating voltage of thepower network up to 24 kV and frequency 50 Hz. The range of rated primary currents: 5 ÷ 1500 A and 2 × 15 ÷ 2 × 600 A.Version with one, two or three cores.

CHARACTERISTICS− small overall dimensions,− all of mounting dimensions enable the interchangeability of transformers of this type with other transformers

manufactured by well−known firms,− the reliability of operation.

OPERATING CONDITIONSThe current transformers type IMZ 20 are designed for operation in indoor equipment, in temperate and tropicalclimate conditions, and in aggressive environmental conditions. Thanks to the increased impulse test voltage strengthand to the increased rated thermal strength the current transformers type IMZ 20 are able to operate at altitudes up to2600 m above sea level. Long−duration thermal current and limits of deviations of transformers in class of accuracy0,5 correspond to extended current range for 120% × Ipn. The lowest permissible temperature during transportationand storage amounts to 218 K (−55oC). The current transformers type IMZ 20 are designed for operation at tempera−tures from 268 K (−5oC) to 313 K (+40oC).

DESIGN AND PRINCIPLE OF OPERATIONThe cast − resin insulated current transformers type IMZ 20 are single−phase, low power transformers, operating inquasi short−circuit conditions, transforming the primary current flowing through the high voltage circuit to the second−ary current at low potential with the accuracy according to their class.The basic structural components of the current transformers are: primary winding, secondary winding or windings,magnetic core and steel base. The primary winding is cast in epoxy−resin mixture. The resinous casting constitutesthe main insulation of the transformer. The secondary windings, wound on the insulating spools, are placed togetherwith the magnetic cores in the window of the resinous casting. The steel base is screwed down to the resinous casting.There is the terminal box in the base, in which there are installed the terminal plates with the leads of secondarywindings connected to them. The grounding of no matter which of the terminals of secondary winding is made byscrewing in a bolt, which is present in a small foil bag placed in the terminal box.We deliver, on Customer’s request, the cover for current transformers with two and three cores, which enables thesealing of the terminals of measuring windings only.

COMPLIANCE WITH STANDARDS− PN−IEC 185− IEC−185− VDE 0414/12.70

THE EXAMPLE OF ORDERThe current transformer type IMZ 20, 2×100/5/5 A/A/A, Ith= 200 × Ipn

I core:10 VA, class 0,5; FS 10II core: 5 VA, 10 P 10

WARRANTYThe factory warranty is twenty four months since the day of putting the apparatus into operation, but not longer thanthirty six months since the date of purchase.

TECHNICAL DATA

The approximate mass of current transformer type IMZ 20 amounts to 33 kg.

IMZ 20 2420 50 60 150 2,5 × Ith

kAkAkAHzkVkV

50

kV

125

kV

Type


transformer

Ratedvoltage



(1− sec.)

Ratedfrequency


Rated short−timedynamic current


The first windings The second windings The third windings1S1 − 1S2 2S1 − 2S2 3S1 − 3S2(S1 − S2)

10VA cl.0,5 FS10

15VA cl.0,5 FS10

30VA cl.0,5 FS10

45VA cl.0,5 FS10

10VA 10P10

15VA 10P10

20VA 10P10

30VA 10P10

45VA 10P10

10VA cl.0,5 FS10 5VA 10P10

10VA cl.0,5 FS10 10VA 10P10

10VA cl.0,5 FS10 15VA 10P10

15VA cl.0,5 FS10 15VA 10P10

15VA cl.0,5 FS10 20VA 10P10

15VA cl.0,5 FS10 30VA 10P10

30VA cl.0,5 FS10 30VA 10P10

30VA cl.0,5 FS10 45VA 10P10

5VA cl.0,5 FS10 5VA 10P10 5VA 10P10

10VA cl.0,5 FS10 5VA 10P10 10VA 10P10

10VA cl.0,5 FS10 10VA 10P10 15VA 10P10

10VA cl.0,5 FS10 15VA 10P10 15VA 10P10

15VA cl.0,5 FS10 5VA 10P10 5VA 10P10

15VA cl.0,5 FS10 10VA 10P10 10VA 10P10

15VA cl.0,5 FS10 10VA 10P10 15VA 10P10

15VA cl.0,5 FS10 15VA 10P10 15VA 10P10

30VA cl.0,5 FS10 15VA 10P10 15VA 10P10


100×Ipn 200×Ipn 300×Ipn 500×Ipn

A kA kA kA kA2×1 0,1−0,2 0,2−0,4 0,3−0,6 0,5−1

2×2 0,2−0,4 0,4−0,8 0,6−1,2 1−22×5 0,5−1 1−2 1,5−3 2,5−52×10 1−2 2−4 3−62×15 1,5−3 3−6 7,5−15

2×20 2−4 4−8 6−12 10−202×25 2,5−5 5−10 7,5−15 12,5−252×30 3−6 6−12 9−18 15−30

2×40 4−8 12−242×50 5−10 10−20 15−30 25−502×60 6−12 12−24

2×75 7,5−15 15−30 22,5−40 37,5−402×100 10−20 20−40 30−402×120 12−242×125 37,5−40

2×150 15−30 30−40 40−402×200 20−40 40−402×250 25−40 40−40

2×300 30−40 40−402×400 40−402×500 40−40

2×600 40−40

100×Ipn 200×Ipn 300×Ipn 500×Ipn

A kA kA kA kA1 0,1 0,2 0,3 0,5

2 0,2 0,4 0,6 15 0,5 1 1,5 2,510 1 2 3

15 1,5 3 7,520 2 4 6 1025 2,5 5 7,5 12,530 3 6 9 15

40 4 8 12 2050 5 10 15 2560 6 12 18 30

75 7,5 15 22,5 37,580 8 24

100 10 20 30 40

120 12 24125 37,5150 15 30 40 40200 20 40 40

250 25 40300 30 40 60400 40 60

500 40 60600 40 60750 40

800 601000 601200 60

1500 60


Parameters related to primary circuit

1 co

re2

core

s3

core

s

Parameters of secondary windingsversion not recommended

version recommended

impossible to make

* except Ipn = 800; 2×400 A** except Ipn = 1; 5; 25; 50; 800; 1000; 2×1; 2×5; 2×25; 2×50;

2×250; 2×400; 2×500 A

***

*

*****

Ver

sion

Rated secondary current Isn

= 5 A

Range of production

100×Ipn 200×Ipn 300×Ipn 500×Ipn

Parameters of secondary windings


Ipn


Ipn


Rated short−time thermal current(1 − sec.) Ith


Publ

icat

ion

04.

2000

ABB - IMZ Prospect

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