Support-type current transformers ТОЛ-10-IM (TOL-10-IM)

Support-type current transformers ТОЛ-10-IM (TOL-10-IM)

Current transformer TOL-10-IMApplication

The transformers are intended for transmitting measuring information signal to the measuring instruments and to protection and monitoring devices as well as for insulation of secondary connections circuits from high voltage factory-assembled switchgears of inside and outside mounting of alternate current electric appliances for the voltage class up to 10 kV with 50 or 60 Hz frequency. The transformers for differential protection are delivered at the special order.

The transformers are produced in climatic versions "M" (moderate) and "T" (tropical) according to the standard requirements of GOST 15150 location category 2 and are intended for usage under the following operating conditions:

  • altitude above sea level is not higher than 1000 m;
  • ambient air temperature considering overheating inside switchgear is given in the table;
  • air humidity for location category 2 is not more than 100% at 25 °C for "M" version and at 35 °C for "T" version;
  • environment should be non-explosive, without corrosive steams in concentrations that are likely to destroy metal or insulation (atmosphere type II as to GOST 15150);
  • mounting in any position.

Transformers are supplied with protective transparent covers for separate sealing of secondary winding's tappings (example of sealing).

The transformer is patented
Patent Publication No 2089955

Table 1. Technical data 

Parameter

Normal value

 

 TOL-10-IM-2

TOL-10-IM-3

TOL-10-IM-4

Rated voltage, kV

10

Maximum operating voltage, kV

12

Rated frequency of alternating current, Hz

50

Rated primary current, A

5; 10; 15; 20; 30; 40; 50; 75; 80; 100; 150; 200; 300; 400; 600; 750; 800; 1000; 1200; 1500; 2000 

Rated secondary current, А

1 or 5 

Number of secondary windings

Accuracy class:
of secondary winding for measurement
of secondary winding for protection


0,2S; 0,5S; 0,2; 0,5
5Р; 10Р 

Rated secondary power at power factor cos j = 0,8 VA:
of secondary winding for measurement
of secondary winding for protection


from 1 up to 30*
from 1 up to 30*

Short-circuit current ratio of secondary windings for protection rated primary current no less then 5-2000 A

10

Instrument security factor of measuring winding, no more then

15

Test voltage, kV:
one-minute of industrial frequency


42

of lighting impulse

75

Climatic version

YHL (moderate cold) or Т (tropical)

Location category

2

Dimensions:
- length


270


300


375

- width

148

- height

256

Mass max., kg

20

23

30

One-second thermal current, kA:
at rated primary current, A

5
10
15
20
30
40
50
75
80
100
150
200
300; 400
600 - 2000



0,4
0,78
1,2
1,56
2,5
3,0
5,0
5,85
6,23
10,0
12,5
20,0
31,5
40,0

Dynamic current, kA:
at rated primary current, A

5
10
15
20
30
40
50
75
80
100
150
200
300; 400
600 - 2000

 

1,0
1,97
3,0
3,93
6,25
7,56
12,8
14,7
15,7
25,5
31,8
51,0
81,0
102,0

Notes:
1. Transformers may be manufactured with parameters differing from the nominal values
2. *-should be specified in the order 

Table 2. Dimensions

Transformer's type

Rated primary current

Pic.

Dimensions, mm

Weight max, kg

L

B

B1

B2

h

TOL-10-IM-2

5-400

1

270

40

100

72

26

19

600-1000

32

1200-2000

2

60

132

104

36

21

TOL-10-IM-3

5-400

3

300

40

100

72

26

22

600-1000

32

1200-2000

4

60

132

104

36

25

TOL-10-IM-4

5-400

5

375

40

100

72

26

29

600-1000

6

32

1200-2000

7

60

132

104

36

32

General view of transformer (drawing)

General view of transformer with mounting plate (drawing)