Ungrounded voltage transformers NOLP (НОЛП) with build-in ptotection device

Ungrounded voltage transformers NOLP (НОЛП) with build-in ptotection device

Description

The transformers are intended for embedding in factory-assembled switchgears and conductors and are used for powering electrical protection, signaling and control circuits of alternating current electrical systems with 50 or 60 Hz frequency.

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

Mounting in any position.

The transformer is patented
Patent Certificate № 2208860
Patent certificate № 53160 on industrial unit. 

Table 1. Technical data

Parameter

Normal value

Electro-magnetic portion (transformer)

Built-in protection device

Voltage class, kV

6

10

10

Maximum working voltage, kV

7,2

12

12

Rated voltage of the primary winding, V

6000
6300
6600
6900

10000
11000

-

Rated voltage of the secondary winding, V

100 or 110*

-

Rated power of the main secondary winding, VA in accuracy class**:
0,2***
0,5
1
3

30
50
75
200

50
75
150
300

-

Maximum power out of accuracy class, VA

400

630

-

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


32
60
70


42
75
90

-

Rated frequency, Hz

50 or 60

-

Resistance of resistor in the protection device, Ohm

-

36/18

Resistor rated power, W

-

0,25/0,125

Vector group of transformer

1/1-0

-

Notes:
Transformers for Automated Systems of Commercial Calculations of Electrical Energy are supplied at the special order with single accuracy class and rated power specified in the order.

*) Rated voltage of secondary winding of 110 V, only for transformers with rated voltage of primary winding of 6600 and 11000V.
**) Highest accuracy class should be specified in the order.
***) Highest accuracy class of 0,2 is only available for transformers with rated voltage of secondary winding of 100 V. 

General view of transformer (drawing)