Grounded voltage transformers with build-in protection device ZNOLP (ЗНОЛП)

Grounded voltage transformers with build-in protection device ZNOLP (ЗНОЛП)

Grounded voltage transformer ZNOLPDescription

The transformers are intended for embedding in factory-assembled switchgears, conductors and are used for powering electrical measuring devises, protection, signaling and control circuits of 50 or 60 Hz networks with insulated neutral .

The transformers are manufactured in climatic design version У (moderate) and T (tropical) according to the standard requirements of GOST 15150 location category 2 with built-in protection device.

The transformer is patented
Patent Certificate №2208860 and №47968 on industrial unit. 

Table 1. Technical data

Parameter

Normal value

ZNOLP-3

ZNOLP-6

ZNOLP-10

Voltage class, kV

3

6

10

Maximum operating voltage, kV

3,6

7,2

12

Rated voltage of the primary winding, V

3000/√3

3300/√3

6000/√3
6300/√3
6600/√3
6900/√3

10000/√3
10500/√3
11000/√3

Rated voltage of the main secondary winding, V

100/√3 or 110/√3

Rated voltage of the additional secondary winding, V

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

Rated power of the main secondary winding , 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 additional secondary winding in accuracy class 3, V•A

150

200

300

Maximum power out of accuracy class, V•A

250

400

630

Maximum allowed continuous primary current, A

0,14

0,11

0,10

AC current frequency, Hz

50 or 60

Resistance of resistor in the protection device, Ohm

9,1

13

Rated power of resistor , Wt

0,25

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


24
40


32
60


42
75

Weight, kg

32±1,5

*Maximum accuracy class should be specified in the order.
** Is intended for usage as second main secondary winding for powering of measuring instrument. Burden of both secondary windings, as well as accuracy classes should be specified in the order.

Table 2. Dimensions

Rated voltage of primary winding

В,mm

H1,mm

H2,mm

Mass,kg

6000/√3, 6300/√3, 6600/√3, 6900/√3, 10000/√3, 10500/√3

175±3

295±3

330±3

32±1

11000/√3 (ZNOLP-10 for nuclear power plants)

195±3

315±3

350±3

37±1

General view of transformer (drawing)