Grounded voltage transformers ZNOL (ЗНОЛ) for outside mounting

Grounded voltage transformers ZNOL-10 III (ЗНОЛ-10 III) for outside mounting

Description

The transformers are intended for embedding in opened factory-assembled switchgears and are intended for powering electrical measuring devices, protection, signaling and control circuits in alternating current electrical systems with 50 or 60 Hz frequency in networks with insulated neutral. At that the outside power of the transformer should not exceed maximum power and the load should be applied to the main secondary winding.
The transformers are manufactured in climatic versionы "УХЛ" (moderate) and "T" (tropical) according to the standard requirements of GOST 15150 location category 1 and are intended for usage under the following operating conditions:

  • altitude above sea level is not higher than 1000 m;
  • ambient air temperature from minus 60 °С to plus 50 °С with the air humidity 100 % at 35 °С for the УХЛ1 version and from 10°С to 55 °С with the air humidity 100°С at 35 °С for the T1 version;
  • creepage distance according to requirments of GOST 9920-III;
  • mounting in any position.

The transformer is patented
Patent certificate № 53930 on industrial unit 

Table 1. Technical data

Parameter

ZNOL-3

ZNOL-6

ZNOL-10

Voltage class, kV

3

6

10

Maximum operating voltage, kV

3,6

7,2

12

Rated voltage of primary winding, V

3000/√3
3300/√3

6000/√3
6300/√3
6600/√3
6900/√3

10000/√3
10500/√3

Rated voltage of main secondary winding, V

100/√З or 100 or 110/√3 or 110

Rated voltage of additional secondary winding, V

100/3 or 100 or 110/3 or 110 or 110/√3**

Rated power of the main secondary winding with power factor of active-inductive load 0,8, VA, in accuracy class*:
0,2
0,5
1
3



15
30
50
150



30
50
75
200



50
75
150
300

Rated power of the additional secondary winding with power factor of active-inductive load 0,8, in accuracy class 3, VA

150

200

300

Maximum power out of accuracy class, VA

250

400

630

Vector group of transformer

1/1/1-0-0

Rated frequency, Hz

50 or 60

Test voltage, kV:
one minute of industrial frequncy
of lighting impulse full
of lighting impulse cut

24
40
50

32
60
70

42
75
90

* The highest accuracy class should be specified in the order.
** Is used as second main secondary winding (for powering of measuring instruments). Burden of both secondary windings, as well as accuracy class should be specified in the order.

General view of transformer (drawing)