Products

INSTRUMENTS VOLATGE TRANSFORMERS INDOOR

MODEL NO:AV-PT-33KV-01

Technical Description

Voltage instrument transformers VT’s are single-phase transformers isolated with one pole. They are designed for the use in the high voltage systems. They are designed for measuring and protection of high voltage distributing equipment for indoor design. The instruments can be equipped with high voltage fuse protecting the surrounding distributing system.

The values of secondary voltage are 100/√3, 110/√3, 120/√3, 100/3, 110/3, 120/3 V. The accuracy classes for measuring winding are 0.2, 0.5, 1, 3, for the securing winding are 3P and 6P. The transformers satisfy required accuracy class at intervals from 25% to 100% of rated load.

Magnetic circuit of voltage transformers VT’s is made of oriented transformer strips in the shape of “C” of core.

All active parts of transformer are compound-insulated with epoxy-mixture. This material performs both the electrical insulating and the mechanical functions.
Transformers are fixed by the means of four screws M12 in the holes in the base plate.
The outlet of primary winding “A” is brought out by the means of bolt M10.

We recommend use terminal ends corresponding to the used cross-section of the conductor for attaching to the secondary outlets. The secondary terminal plate is provided with the cover with sealing screw. Inside, there is the set with jumpers and small screws for the possibility of earth connection and short circuiting of the wiring.

In cases where the substitution for the older types of transformers (various producers) is required, we supply transformers VT’s with modified basic plates that have identical mounting spacing to spacing of the substituted types.