Current transformers support type ТОЛК-10-1 (TOLK-10-1)

Current transformers support type  ТОЛК-10-1 (TOLK-10-1)

Трансформатор тока ТОЛК-10-1Description

Transformers are intended for embedding in high-voltage explosive-proof switchgears in 10 kV networks of coal and slate mines, dangerous in gas and dust. The transformers are used for measuring of current, poweting of relay protection, as well as for checking operation of instruments of maximum current protection in situations when there is no load in primary circuit.

Transformer has additional winding for measurement.

Transformers are manufatured according to the standard rerquirements of GOST 15150 in climatic version "O" location category 5.1.

Embidient environment inside switchgear - atmosphere of underground coal and slate mines, dustiness according to the standard "Rules of safety in coal and slate mines".

Atmosphere corrosivity according ti the GOST 15150 expluation group 7.

Mounting in any position.

Transformers TOLK-10-1 are supplied with protective transparent cover for separate sealing of secondary winding's tappings (example of sealing). 

 Table 1. Technical data

Parameter

 Value

Rated voltage, kV

10

Maximum operating voltage, kV

12

Rated frequency of AC current, Hz

50

Rated secondary current, A

1; 5

Rated primary current, A

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

Number of secondary windings

2

Accuracy class of secondary winding

for measurement
for protection

 

0,2; 0,2S; 0,5; 0,5S; 1
5P; 10P

Rated secondary burden, VA
of secondary winding for measurement at cos φ= 1
(active-inductive load) at cos φ= 0,8
of secondary winding for protection at cos φ= 0,8


1-2,5*
3-30*
30

Short-circuit current ratio of of secondary winding for protection, no less than
at the rated burden of 15 VA
at the rated burden of 30 VA


8
5,5

Instrument security factor of the winding for measurement for given accuracy classes**:
0,2; 0,2S; 0,5S, no more than
0,5, no more than



10
16

Rated supply voltage of additional winding, V

100 (+/-) 20

One-second thermal current, kA, at a given primary current:
10-15
20
30
40
50
75
80
100
150
200
300
400-600


1,28
1,92
3,2
3,84
5,76
8,32
8,96
12,8
15,36
22,4
35,2
38,4

Dynamic current, kA
10-15
20
30
40
50
75
80
100
150
200
300
400-600


3,2
4,8
8,1
9,7
14,7
21,2
22,8
32,6
39
57
89
98

* According to the order
**At the rated burden of 10 VA

General view of transformer (drawing)