Indoor current transformers support type ТЛК-35 (TLK-35)

Indoor current transformers support type ТЛК-35 (TLK-35)

Indoor current transformer TLK-35Description

The transformers are intended for transmitting the measuring information signal to measuring instruments and to protection, automatic control and signaling devices of the alternate current with 50 or 60 Hz frequency for the rated voltage class up to 35 kV.
The transformers for differential protection are manufactured in compliance with the order.
The transformers are manufactured in climatic version "УХЛ" (moderate cold) according to the standard requirements of GOST 15150 location category 2.1 and are intended for usage under the following operating conditions:

  • altitude above sea level is not higher than 1000 m;
  • ambient air temperature, considering the overheating inside switchgear is from plus 55 °C to minus 60 °C;
  • the 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.

Table 1. Technical data

Parameter

Value

Rated voltage, kV

35

Maximum operating voltage, kV

40,5

AC current frequency, Hz

50 или 60

Rated primary current, A*

5, 10, 15, 20, 30, 40, 50, 75, 80, 100, 150; 200; 300; 400; 600; 800; 1000; 1500; 2000; 3000*

Rated secondary current, A

1 or 5

Number of secondary windings

2, 3, 4

Accuracy class at the rated primary current:
of the winding for measurement
of the winding for protection


0,2; 0,2S; 0,5; 0,5S
1; 3; 5Р; 10P

Rated secondary burden at power coefficient cos φ = 0,8, VA,
at the rated primary current:
of the winding for measurement:
of the winding for protection:



5; 10; 15; 20; 30
5; 10; 15; 20; 30

Short-circuit current ratio of the winding for protection, no less, at the rated primary current


3-12

Three-second thermal current, kA, no less, at  the rated primary current:
5
10, 15
20, 30
40
50, 75
80
100
150-1000
1500
2000
3000



0,6
1
2
6,1
8,1
15,3
20,1
31,5
50
50
100

Dynamic current, kA, at the rated primary current:
5
10, 15
20, 30
40
50, 75
80
100
150-1000
1500
2000
3000


1,5
2,6
5,2
15,6
20,8
39,1
51,3
80
125
125
250

Weight, kg, max,at rated primary current, A:
5-1500 A
2000, 3000 A


50**
70

Short-circuit current ratio of the winding for protection ata  given primary current, A:

150-1500                       in accuracy class 10Р
2000                             in accuracy class 5Р; 10Р
3000                             in accuracy class 5Р

 


10
12
8

Three-second thermal current, kA, no less than, at a given primary current, A:

150                              
200-1000
1500, 2000
3000

 


20
31,5
50
100

Dynamic current, kA, at a given primary current, A:

150
200-1000
1500, 2000
3000

 

51
80
125
250

Test voltage, kV:

of industrial frequency during one minute
of full lihting impulse

 

95
220

* Transformers on primary currents of 2000, 25000 and 3000A are available only for type TLK-35 with two secondary windings
** TLK-35-1 - 70 kg; TLK-35-2 - 85 kg.

Table 2.

Secondary burden, VA Accuracy classes at a given primary current, A
from 150 up to 1500 2000; 3000
40
75
3
-
1
3

Table 3. Dimensions

Transformer type Dimensions, mm Weight, kg
A B C H
TLK-35 245±2.5 300-3 80±1.2 336-3 50±2.5
TLK-35-1 335±2.5 390-3 170±1.2 426-3 70±2.5
TLK-35-2 410±2.5 465-3 245±1.2 401-3 85±2.5

General view of transformer (drawing)