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Current and voltage transformers

for

Low Voltage

Edition 05 07


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Operation manual

1. Mounting siteInstrument transformers of ALCE shall be mounted in

accordance with following conditions;

a) Ambient temperature: -20C~40C (Avarage temp.:

lower than 35C)

b) Altitude: lower than 1000 meters.

c) At the places not exposed to sea - breeze, rain,

snow and sunlight and kept under 90% humidity.

d) At places where the exceeded vapor, oil-vapor,

explosive flammable gas shall not occur.

e) At places not subject to exceeded dust & foreing

particles.

f) At places where exceeded oscillation and impact shall

not occur.

2. How to mount

a) Cable and busbar shall not be directly loaded onto

CT&PT.

b) Enough distance shall be taken that primary lead

wires and busbars do not approach the surface of

transformers except the connection terminals. Besides,

please draw your attention for corona and partial

discharge not to occur.

c) Secondary lead wires shall be correctly connected to

the terminals and shall not be approached to the surface

of transformers.

d) The connection shall be correctly done as per the

terminals marks and connection diagram on the name

plate.

e) The earthing terminal on primary side of grounding

type of instrument transformers shall be absolutely

grounded.

f) The earthing terminal on secondary side and the

mounted base (flame) on the body shall be absolutely

grounded.

g) Bolts & Nuts for the connection of cables, busbars

and lead wires shall be firmly fastened.

3.Maintenance and inspection

a) Please check instrument transformers once a month

and pay your attention for noise, over - heat, corrosion

and exceeded polluting. It is recommended to put the

thermo-labels on surface of transformers and terminals

portion.

b) The operation shall be stopped at least once a year

and the dust & foreing particles shall be wiped off with

dry cloth. At that time, please check the appearance,

the iron-core and looseness of bolts & nuts.


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General information

Current transformers for low voltage

Location : indoor

Standard, insulation level : IEC - 60044-1, DIN VDE 0414 edition 01/1994, Um: 0,72 kV

Frequency : 50 - 60 Hz

Insulation : thermoplastic casing, insulation class E

Rated continious thermal current : 1,2 In

Secondary rated current : 5A or 1A

Security factor : for class 0.5, at primary current


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General information


-all types are sealed or pivoted from inside, not openable

Types according to bar dimensions

120

mm

Types Descriptions

Plug-in current transformers. For bars or round conductor.

Wound current transformers (primary cable)

Wound current transformers (primary busbar 25x3 mm x mm)

ADS 20, A 20, ADS 30, ADB 30

ADS 40, ADB 40, A 50, A 61,

ADS 62, ADB 80, ADB 81, A 101,

ADB 111, ADB 120

ASS, ASK

ASB

Current transformer for differential protection.TDR

ARS-1, ARS-2

ARK-1, ARK-2

Bar or cable type. Protection current transformer for relays.ARD-2, ARD-3

Types and descriptions

Primary cable protection current transformer for relays.

Bar-type cast resin.A125

Summation current transformers with up to 6 separate independent primary input circuits.TA-2, TA-3, TA-4, TA-5, TA6

Bar-type. Protection current transformer for relays.

120

mm

Bar widths

20

mm

30

mm

40

mm

50

mm

60

mm

80

mm

100

mm

150

mm

ADS 20, A 20

ADS 30, ADB 30

ADS 40, ADB 40

A50

A61

ADS 62

ADB 80

ADB 81

A101

ADS 100, ADB 111

ADB120

Types

ADB120

A 125

(*)

200

mm

(*) (*)

(*) Upon request


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Tables and dimensions


ASS, ADS20, ADS30, ADS40, ADS62, ADS100

Types ASS ADS20 ADS30 ADS40 ADS62 ADS100

Primarycurrent

A

For secondary 5A or 1A

0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0

2,55

10

15

20

25

30

40

50

60

75

80

100

125

150

200

250

300

400

500

600

750

800

1000

1200

1250

1500

1600

1800

2000

2500

Cablemm

Windowmm x mm

Barmm x mm

1 2,5 2,5

2,5 2,55 5

5 5

5 5

() ()

() ()

() ()

() ()

() ()

() ()

- 2,5

- 2,5

2,5 5

3,75 5

30 30

30 30

15 15

15 15

30 30

30 30

10 10

10 10

10 10

10 10

2,5 5

3,75 5

5 5

5 5

5 10

-

-

-

15

21 x 5,5

20 x 5

23

31 x10,5

30 x 10

28

41 x 15

40 x 10

30

61 x 31

2(60 x 10)

52

101 x 53

3(100 x 10)

Class

) Penetration winding current transformers All types are protected against contact.

Rated power VA

5 5

() 2,5

() 2,5

10

10

10 15

10 15

10 15

30 30

30 30

30 30

15 15

15 15

15 15

30 30

30 30

30 30

5 5

3000

3200

30 30

30 30

ASS

ADS 20

ADS 30

ADS 40

ADS 62

ADS 100


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Current transformers low voltage

ASK, ASB, A20, ADB30, ADB40, A50, A61

ASK

ASB

A20

ADB30

ADB40

A50

A61

Types ASK ASB A20 ADB30 ADB40 A50

1

Primarycurrent

A

Rated power VA

0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0

2,5

5

10

15

20

25

30

40

50

60

75

80

100

125

150

200

250

300

400

500

600

750

800

1000

1200

A61

0,5 1,0

Barmm x mm

Windowmm x mm

Cable

mm

10 10

10 10

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

5 10

10 15

15 15

15 15

10 10

10 15

15 15

15 15

10 10

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

15 15

Class

-

-

-

-

-

-

16

21 x 11

20 x 10

31 x 11

30 x 10

41 x 11

40 x 10

51 x 11

50 x 10

-

62 x 12

60 x 10

26 30 40


15 15

5 5 (*) 5

(*) 10

15 15

15 15

(*) 10

10 10

15 15

15 15

15 15

10 15

10 10

5 10

10 10

10 15

1250 15 15

All types are protected against contact


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ADB80, ADB81, A101, ADB111, ADB120

ADB111

ADB120

* For primary currents >4000 A , only 5A secondary current is possible.All types are protected against contact

ADB80

ADB81

A101

Types ADB80 ADB81 A101 ADB111 ADB120

Primarycurrent

A

Rated power VA

0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0 0,5 1,0

400

500

600

750

800

1000

1200

1500

10 10

10 15

15 15

15 30

15 30

30 30

15 30

15 30

15 30

15 30

15 30

30 30 15 30 15 15

30 45

Barmm x mm

Windowmm x mm

Cablemm

61

82 x 32

2(80 x 10)

30

81 x 31

2(80 x 10)

30

102 x 32

2(100 x 10)

56

102 x 58

3(100 x 10)

70

121 x 72

4(120 x 10)

Class

For secondary 5A or 1A *

15 15

1600

1800

2000

2500

3000

4000

30 30

30 30

30 30

30 30

30 30

30 30

30 30

30 30

30 30

30 30 30 30 30 30

30 45

30 30

30 30

5000

30 30

30 30

30 30

10 15

10 15

10 10

30 30

30 30

30 30

30 30

10 15

15 15

30 30

30 30

30 30

30 30

30 30

30 30

30 30

30 45

30 30

30 30

30 30

30 30

30 30

30 4530 45


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ARS-1, ARS-2, ARK-1, ARK-2, ARD-2, ARD-3

ARS-1

ARS-2

ARK-1

ARK-2

ARD-2

ARD-3

Primary bars (for type ARK)

Primary currentA

25 - 200 5

Bar widthmm

Types ARS - 1 ARS - 2 ARK - 1 ARK - 2

Primarycurrent

A


5P510P5

5

10

15

20

25

30

40

50

60

75

80

100

125

150

200250

300

400

500

600

750

800

1000

1200

1250

1500

1600

1800

2000

2500

3000

4000

ARD - 2 ARD - 3

Barmm x mm

Windowmm x mm

Cable

mm

5P1010P10

5P510P5

5P1010P10

5P510P5

5P1010P10

5P510P5

5P1010P10

5P510P5

5P1010P10

5P510P5

5P1010P10

-

-

-

-

-

-

-

-

-

-

-

-

30

82 - 32

2(80 x 10)

30

102 - 32

2(100 x 10)

15

15

15

15

5

5

5

5

30

30

30

30

15

15

15

15

15 5

15 5

15 5

15 5

15 5

15 5

15 5

15 5

15 5

15 5

15 515 5

15 5

15 5

30 15

30 15

30 15

30 15

30 15

30 15

30 15

30 15

30 15

30 15

30 1530 15

30 15

30 15

15 5

15 5

15 5

15 5

30 15

30 15

30 15

30 15

30 30

30 30

30 30 30 30

30 30

30 30

30 15

30 15

30 15

30 15

30 15

30 15

30 15

30 15

45 30

45 30

45 30

Class

Rated power VA

All types are protected against contact


9/12


Summation current transformers for low voltage

TA-2, TA-3, TA-4, TA-5, TA-6

Important : Summation current transformers are

designed according to the ratios of the

main current transformers for summation.

Type 1

Type 2

Primary

A

TA-2

5+5 / 5

Rated power VA

Class 0,5

TA-3

5+5+5 / 5

TA-4

5+5+5+5 / 5

TA-5

5+5+5+5+5 / 5

Class 1

TA-6

5+5+5+5+5+5 / 5

Type1 Type 1 Type 2

5

10

5

10

30

30

1015

30

30

1530

1530

1530

510

1530

1530

1530

Connection diagram of summation current transformer ( Type TA-3 )One phase (R) of the three- phase A, B, C groups is shown in the picture

Type 2

R S T

R S T

Burden for measuring

K L

k l

K L

k l

K L

k l

AK AL BK BL CK CL

k l

R S T

A

B

C

Example :

Main currenttransformers :

Summation currenttranformers :

Result :

300A5

100A1

100A5

, ,

5 + 1 + 5

5

A

300 + 100 + 1005

: 100 Ratio

Burden of summation current transformerSummation currenttransformers

*

*

*

*

*

*

*

*

*

* Main currenttransformers


10/12

Table and dimensions

Current transformer for low voltage

A125

A125

A125

0,5 1,0

126 x 72

4(120 x 10)

30 45

60 100

30 45

45 60

Class


Rated power VA

Tip

Primarycurrent

A

5000

60007500

8000

Barmm x mm

Windowmm x mm

Indoor current transformerType A125cast resin, for busbar fastening


11/12

Table and dimensions

Voltage transformersfor measuring and protection

VM, 2VM

- Insulation level 0,72 kV and 1,2 kV

- Windings are cast resin.

For secondary voltage 100 V or 110 V

Secondary thermal burden current; Isth

Secondary voltage = 100 V 3 , 110 V 3

Rated voltage factor = 1.9 (30 sec.)

Secondary thermal burden current; Isth

Primary

voltage

0.72 kV, Isth=3A*

100 : 3

VA

15

110 : 3 30

Class

0.5

1

2

Class

1

1

1

Class

3

1

1

200 : 3 45 - 2 1220 : 3 60 - 2 1380 : 3 Rated output and

sizes as above.400 : 3500 : 3

1.2 kV, Isth=2A*

500 : 3 15600 : 3 30

1

-

1

1

1

1

750 : 3 45 - 2 11000 : 3 60 - 2 2

Type

1

2

L1

40

50

L2

90

100

Weight (kg)

6.6

8.3

2VMVM

* Isth = 1A with earth-fault winding

Earth-fault winding =100 V

3,

110 V

3

Primary

voltage

0.72 kV, Isth=2A

100 V

VA

30

110 V

Class

0.5

2

Class

1

1

Class

3

1

200 V

220 V 60 - 1 1

380 V Rated output and

sizes as above.400 V

500 V

1.2 kV, Isth=1A

500 V 15

600 V 30

1

2

1

1

1

1

750 V 45 - 2 1

1000 V 60 - 2 1

45 - 1 1


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