Fittings

Transformers Fittings

• Each transformer is supplied with the following standard fittings.
• Rating Plate giving all technical details.
• Two earth connections.
• Oil Filling Plug.
• LV Bushings.
• HT Bushing.
• Carriage with bi-directional wheels for ratings 100KVA and above.
• Lifting Lugs.
• Off circuit tap charger with handle on cover.
• Drain valve with conservator tank transformer.
• Thermometer pocket with conservator tank transformer.
• Security valve (with Power Transformer.)
• Buchholz Rely single or double float and dial type transformer on request.

Routine Tests

The following routine tests are carried out on each transformer before leaving the factory.

• Include Voltage test (Insulation test.)
• Separate source over voltage test (high voltage test.)
• Iron loss test (no load test.)
• Copper loss test (full load test.)
• Turn ratio test.
• Vector Group test.
• Oil testing of transformer as per IEC-296.

Cable and Boxes

Every new design of transformer is subject to the following type tests.

• Short circuit test.
• Temperature rise test.
• Impulse voltage withstand test.
• The design of all transformers in distribution range has been tested against the short circuit test at:
• High voltage and short circuit Laboratory.
• Rawat (Islamabad).
• N.V.KEMA Laboratory, Netherlands