Grounded voltage transformers with build-in protection device ZNOLPM (ЗНОЛПМ)

Grounded voltage transformers with build-in protection device ZNOLPM (ЗНОЛПМ)

Grounded voltage transformer ZNOLPMDescription

The transformers are intended for embedding in factory-assembled switchgears, conductors and are used for powering electrical measuring devises, protection, signaling and control circuits in 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 unit.

Mounting in any position

The position of primary winding tapping may be either on a front or back side of transformer (see transformer scheme below). 

Table 1. Technical data

Parameter

Normal value

ZNOLPM-6
ZNOLPMI-6

ZNOLPM-10
ZNOLPMI-10

Voltage class, kV

6

10

Maximum operating voltage. kV

7,2

12

Rated voltage of primary winding. V

6000/√3

6300/√3

6600/√3

6900/√3

10000/√3

10500/√3

11000/√3

Rated voltage of main secondary winding, V

100/√3

Rated voltage of additional secondary winding, V

100/3 or 100 or 100/√3*

Rated burden of main secondary winding, VA
in accuracy class:**

0,2
0,5
1

 


10
30
75

 


10
30
90

Rated burden of additional secondary winding in accuracy class 3, VA

200

Rated burden out of accuracy class, VA

400

Maximum allowed continuous current, A

0,12

0,11

0,07

0,06

Vector group of transformer

1/1/1-0-0

AC current frequency, Hz

50

Resistance of resistor installed in safeguard, Ohm

11

11

Rated power of resistor, Wt

0,25

0,125

Mass, kg

22±0,5

*) Is intended for usage as second main secondary winding (for powering measuring instruments). Burden of both secondary windings, as well as required accuracy classes should be specified in the order.

**)Required burden should be specified in the order.

General view of transformer (drawing)