Ungrounded voltage transformers NOL.12 (НОЛ.12)

Ungrounded voltage transformers NOL.12 (НОЛ.12)

Ungrounded voltage transformer NOL.12Description

The transformers are intended for embedding in marine alternate current electrical appliances with 50 Hz frequency for powering electrical measuring and protection devices, as well as automated, signaling and control circuits and as component units. The transformers are manufactured in climatic version "OM" according the standard requirements of GOST 15150 location category 3 and are intended for usage under the following operating conditions:

  • ambient air temperature is from plus 45 °С to minus 40 °С;
  • mounting in any position.

Ungrounded voltage transformer NOL.12The transformers are patented
Patent Certificate № 6266, 6267 

Table 1. Technical data

Parameter

Normal value

NOL.12-0,38.ОМЗ

NOL.12-0,69.ОМЗ

NOL.12-6.ОМЗ

NOL.12-10.ОМЗ

Voltage class, kV

0,66

0,66

6

10

Rated voltage of the primary winding, V

380

690

6300

10500

Rated voltage of the secondary winding, V

127

100 and 127

Rated power, VA in accuracy class 1

30

Maximum power, VA

80

125

Rated frequency, Hz

50

Accuracy class

1,0

Voltage error at the maximum power, % no more

 4
Vector group of transformer 1/1-0

Picture

1

4

Table 2. Dimensions

Transformer type

Dimensions, mm

Mass, kg

Н

h

h1

L

L1

NOL.12-0,38 OM3

114 max

103-2

8±1,8

145 max

110±1

4,4±0,3

NOL.12-0,69 OM3

124 max

113-2

13±2,2

151 max

116±1

4,8±0,3

Table 3. Dimensions

Transformer type

Dimensions, mm

Mass, kg

Н

h

L

l1

l2

l3

NOL.12-6 OM3

207 max

20

248 max

180±1

185 max

231±3

15±1,5

NOL.12-10 OM3

222 max

28

268 max

200±1

207 max

242±3

20±1,5

General view of transformer (drawing)