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VTDOR 38 Voltage transformers VTDOR 38 are single-phase transformers isolated with double-poles. They are designed for outdoor mounting in the high voltage systems of 6 kV. They are designed above all ...
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Voltage transformers VTDOR 38 are single-phase transformers isolated with double-poles. They are designed for intdoor (or outdoor in shelter) mounting in the high voltage systems of 6 kV. They are designed above all for power supply of automatic track safety appliances with power take-off of 220 V,0-1.2 kVA at 50-75 Hz and furthermore as the sources for general use. The construction of instrument is basedon the requirements of Czech Railways for the transformers supplying safety appliances and also on the measuring transformers.The instruments satisfy the tests of standards ČSN EN 60044-2. Technical parameters are listed in the previous table.
Transformers are fixed by the means of four screws M12 in the holes in the basic frame. For the mounting of transformers into thetransformation stations that have already been built it is possible to use auxiliary suspension frame. This frame can be supplied as fixings.
Metal parts of transformer are cold-galvanized, electrically conductive areas are nickeled. The outlets of primary windings “A” and “X” are brought out by the means of screw bolts M10. For contacting them we recommend use conductors of maximumdiameter of 6 mm2 and terminal ends by reason of suspension of 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. We recommend use terminal ends corresponding to the used cross-section of the conductor for attaching to the secondary outlets.
The secondary terminal board is covered with the waterproof cover. It is possible to seal the cover.
The transformers were developed especially for the purposes of the Czech Railways.
