Ungrounded voltage transformers NOL.08 (НОЛ.08)

Ungrounded voltage transformers NOL.08 (НОЛ.08)

Grounded voltage transformer NOL.08Description

The transformers are intended for embedding into the factory-assembled switchgears and closed switchgears and are used for powering electrical measuring devices, protection and signaling circuits in electrical devices of alternate current with 50 Hz or 60 Hz frequency. Transformers are manufactured in compliance with the standard requirements of GOST 15150 in climatic version "УT" (moderate-tropical) 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 is from minus 45 °C to plus 60 °C;
  • ambient air humidity is 100 % at 35 °C;
  • environment should be non-explosive, without reactive steams in concentrations that are likely to destroy metal or insulation no direct influence of solar radiation;
  • mounting in any position.

The transformer is patented
Patent Publication №6267 

Table 1. Technical data

Parameter

Normal values for design versions 

NOL.08-3

NOL.08-6

NOL.08-10

Voltage class, kV

3

6

10

Maximum operating voltage, kV

3,6

7,2

12

Rated voltage of primary winding , V

3000, 3300

6000, 6300, 6600, 6900

10000, 11000

Rated voltage of secondary winding , V

100 or 110*

Rated frequency, Hz

50 or 60

Rated burden, VA: **

in accuracy class 0,2***

10; (15)

10; 15; 25; (30)

10; 15; 25; 30; (50)

                          0,5

10; 15; (30)

10; 15; 25; 30; (50)

10; 15; 25; 30; 50; (75)

                          1,0

50

75

150

                          3,0

75

200

300

Maximum burden out of accuracy class, VA 

160

400

630

Vector group of transformer

1/1-0

Table 2.

Transformer type D, mm Mass, kg
NOL.08-3 188±3 25,6
NOL.08-6 26,2
NOL.08-10 212±3 28,2

General view of transformer (drawing)