Bus-bar current transformers ТНШЛ-0,66 (TNSHL-0,66)

Bus-bar current transformers TNSHL-0,66

Current transformer TNSHLApplication

The transformers are intended for embedding in factory-assembled switchgears (KRU) and for transmitting measuring information signal to measuring instruments and to protection, automatic control and signaling devices of the alternate current with the frequency 50 or 60 Hz and rated voltage up to 0,66 kV inclusive. The transformers for differential protection are delivered at the special order.

The transformers for the currents 600 - 2000 A are manufactured in bodies of hard inflammable self-extinguishing plastics.

Current transformer TNSHLThe transformers are manufactured in climatic versions "Y" (temperate) 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 within operation period is from minus 45 to plus 50 °C;
  • within transportation and storage period - from minus 50 to plus 50 °C;
  • 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 for the currents 600-5000 A;
  • in vertical position for the currents 8000-10000.

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

The transformer is patented
Patented Certificate № 6271

Table 1. Technical data (TNSHL-0,66 on currents 150-500A) 

Parameter

Normal value

Rated voltage, kV

0,66

Maximum operating voltage, kV

0,8

Rated frequency of alternate current, Hz

50; 60

Rated primary current. A

150; 200; 300; 400; 500 

Rated secondary current, A

1; 5

Rated burden of the winding with the power factor of cos φ = 1, VA

Rated burden of the winding with the power factor of cos φ = 0.8, VA, at the rated primary current, A
50, 200
300, 400
500

1; 1,25; 2,5*


3; 5*
3; 5; 10*
3; 5; 10; 15; 20*

Rated accuracy class, at hte rated primary current, A:
150
200
300
400; 500 

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

Three-second thermal current - 3 sec., not less:
150-600 A, (multiplicity)

25 

Short-circuit current ratio, at the rated primary current, A:
200, 300
400, 500

4
8

Notes:
1. * Rated burden should be specified in the order.
2. ** At rated secondary burden of 5VA. 

Table 2. Technical data (TNSHL-0,66 on currents 600-10 000 A) 

Parameter

Normal value

Rated voltage, kV

0,66

Maximum operating voltage, kV

0,8

Rated frequency of alternate current, Hz

50; 60

Rated primary current. A

600; 800; 1000; 1500; 2000; 3000;
4000; 5000; 8000; 10000

Rated secondary current, A

1; 5

Rated burden of the winding with the power factor of cos j = 0.8, VA,

20

Rated accuracy class, at hte rated primary current, A:
600-2000
3000-5000
8000-10 000

0,5S; 0,5; 10P
0,2S; 0,5S; 0,5; 10P
3; 10P

Three-second thermal current, not less:
600-2000 A, (multiplicity)
3000-10 000 A, (kA)

25
75

Short-circuit current ratio, at the rated primary current, A:
600
800
1000
1500-3000
4000-5000
8000-10 000

6
7
10
11
12
2

Notes:
One-minute test voltage of the industrial frequency of the secondary winding – 3 kV for the versions У2 and 3,3 kV for T2. 

Table 3.

Rated primary current, А

Pic.

Dimensions, мм

Mass, кг, max

H

B

L

L1

3000-5000

3

320

86

318

180

9,8

8000-10000

5

432

134

422

340

31

Table 4.

Rated primary current, А

Pic.

Mass, кг, max

600-2000

2

4,0

4

5,3

General view of transformer (drawing)