Indoor current transformers support type ТОЛ-35 (TOL-35)

Indoor current transformers support type ТОЛ-35 (TOL-35)

Outdoor current transformer TOL-35Description

The transformers are intended for transmitting measuring information signal to measuring instruments and/or to protection, automatic control and signaling devices for secondary connection circuit insulation from high voltage in alternate current electrical devices for voltage class up to 35 kV with 50 or 60 Hz frequency.
The transformers for differential protection are manufactured in compliance with the order.
The transformers are designed for embedding in opened factory-assembled switchgears.
The transformers are manufactured in climatic versions "УХЛ1" (moderate cold outside mounting) and "T1" (tropical) according to the standard requirements of GOST 15150.
Creepage distance length III as to GOST 9920.

Table 1. Technical data

Parameter

Value for transformer type

II, II-1

III, III-1

V-4

V-5

Rated voltage, kV

35

Maximum operational voltage, kV

40,5

Rated frequency of alternating current, Hz

50 or 60

Rated primary current, A 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000 500, 1000, 1500, 2000, 3000 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 3000 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 3000
Rated secondary current, A 5 or 1

Number of secondary windings:
for measurement
for protection


1
2


1     2
3 or 2


2
3

Accuracy class of secondary windings:
for measurement
for protection


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

Rated secondary burden at cos φ = 0,8, VA:
of secondary winding for measurement
of secondary winding for protection


30
30


30
50


30
30


15
20

Short-circuit current ratio of secondary winding for protection, no less

20

Rated instrument security factor of secondary winding for measurement, no more
at a given primary current:
15-400; 600; 800
500
1000; 1500
2000
3000



5
-
5
5
-



-
5
5
5
5



5
-
5
5
5



6
-
6
7
7

Table 2. Thermal and dynamic currents

Transformer type

Rated primary current, A

Three-second thermal stability current, kA

Electrodynamics stability current, kA

II, II-1

V-4, V-5

15
20
30
40
50
75
100
150
200
300
400
600
800
1000
1500
2000

0,7
1
1,5
2,1
2,3
3,5
4,7
7
10,5
15
21
31
30
37
41
57

3
4
6
8
10
15
21
31
42
63
84
127
107
134
106
220

V-4, V-5

3000

57

220

III, III-1

500
1000
1500
2000
3000

49
49
49
57
57

125
125
125
145
145

Table 3. Dimensions

Transformer type

Rated primary current, A

L1,mm

L2 ,mm

L3 ,mm

L4, mm

Pic.

II

15–500
600, 800, 1000, 1500, 2000

630

652

512

552

2
1

III

500
1000, 1500, 2000, 3000

630

652

512

552

2
1

 II - 1

15-500
600, 800, 1000, 1500, 2000 

 540

598

494

470 

2
 1 

 III - 1

 500
1000, 1500, 2000, 3000

 540

 598

494

470

2
1

V - 4 15-800
1000, 1500, 2000, 3000
630 652 512 552 2 and 4
1 and 4
V - 5 15-800
1000, 1500, 2000, 3000
630 652 512 552 2 and 5
1 and 5

Table 3(continuation). Dimensions

Rated primary current, A S, mm
600, 800, 1000 12
1500 15
2000, 3000 20

General view of transformer (drawing)