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

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

Current transformer TOL-10Application

The transformers are intended for embedding into factory-assembled switchgears (KRU) and for transmission of measuring information signal to the measuring devices and/or protection and monitoring appliances, as well as for insulation of secondary connections circuits from high voltage in alternate current electric appliances for the voltage class up to 10 kV of the frequency 50 or 60 Hz.. The transformers for differential protection are delivered at the special order.

The transformers are produced in climatic versions "T" (tropical) and "УXЛ" (moderate cold) according to the standard requirements of GOST 15150 location category 2.1 and are intended for usage in closed premises in accordance with the following operating conditions:

altitude above sea level is not higher than 1000 m; ambient air temperature considering overheating inside KRU is from minus 10 °C to plus 55 °C for "T" version and from minus 60°C to plus 50°C for "УXL" version; air humidity is 98% at 35°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.

The transformers are produced with one secondary winding for measuring and one secondary winding for protection. The transformers for the rated current 1000 and 1500 A can be manufactured with two secondary windings for protection.

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

The transformer is patented
Patent Certificate №6269

Table 1. Technical Data 

Parameter

Normal value at the rated primary current, A

 

Rated voltage, kV

10 or 11

Maximum operating voltage, kV

12

Rated frequency, Hz

50 or 60

Rated secondary current, A

1; 5

Rated secondary current, A

 10, 20, 30, 40, 50, 100, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000, 2500, 3000

Number of secondary windings

2
3 for transformer with with rated secondary current of 2500/3000A

Rated secondary burden, VA
for measurement
for protection


10
15

Accuracy class of secondary winding
for measurement
for protection


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

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

10

Dynamic current, kA
at the rated primary current, A
50
100-200
300-2000



17,5
52
100

One-second thermal stability current, kA,
at the rated primary current, A
50
100
150
200
300-2000

4,9
9,7
12,5
17,5
31,5

Test voltage, kV:
one-minute of industrial frequency
of full lighting impulse


42
75

Weight, kg

25

Notes:
*) on demand may be supplied with accuracy class 5P
**) should be specified in the order
 

General view of transformer (drawing)