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We measure high voltage for you

using instrument transformers for both outdoor and indoor applications, special transformers, sensors and power transformers

 

as measuring tranformer supply transformer Insulating voltage 25 kV 25 kV Trial voltage 50 kV 50 kV Trial surge voltage 125 kV 125 kV Rated primary current 3000 – 22000 V 6000 – 22000 V Rated secondary current 100, 110, 120 V 100, 110, 120, 230 V Rated frequency 50 Hz 50 Hz Power 10, 30, 50, 75, 100, 150 VА 15 kV 22 kV 800 VA 500 VA Accuracy class 0.2, 0.5, 1, 3Р, 6Р 6% Maximum power 500 VА Lenght of surface path 930 mm Weight 49 kg Approval TCM 212/02-3636 drawing [ZIP, 214kB] in DXF format

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Voltage instrument transformers VPT 25 are single-phase transformers. They are designed for the use in the high voltage systems. They are designed for measuring and protection of high voltage distributing equipment for outdoor design. They are suitable for supplying of drives of remote-controlled section switches.

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

Magnetic circuit of voltage transformers VPT 25 is made of oriented transformer strips in the shape of “C” of core. The outlets of primary winding are brought out by the means of bolts M10. For contacting them we recommend use conductors of maximum diameter of 6 mm2 and terminal ends by reason of suspensionof dynamic forces and vibrations within the system.

ATTENTION! The isolators must not be pre-stressed mechanically in the direction away from the body of transformer during the other way of contacting.

All active parts of transformers VPT 25 are compound-insulated with epoxy-mixture resistant to the external effects (UV radiation, humidity, etc.) 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 basic frame. 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 waterproof cover. The cover can be sealed. Inside, there is the set with jumpers and small screws for the possibility of earth connection and short circuiting of the wiring. (See “ The Instructions for the mounting and operation”).

In cases where the substitution for the older types of transformers (various producers) is required, we supply transformers VPT 25 with modified basic plates that have identical mounting spacing to spacing of the substituted types.

Voltage instrument transformers VPT 25 complied all the tests according to the ČSN EN 600442.

For the customer’s request we provide official calibration.

It is possible to consult other technical parameters with the producer.