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Power Transformer
Which tests do manufacturers of power transformers perform before shipping units to utilities?
Asked: January 23, 2026 at 2:31 am by Brandon Martin
- This topic has 1 reply, 2 voices, and was last updated 2 months, 3 weeks ago by Matthew Johnson.
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January 23, 2026 at 2:44 am by Matthew Johnson
Manufacturers perform routine tests (ratio, winding resistance, insulation resistance, tan-delta, impedance, no-load/load losses, induced and applied voltage withstand), type tests (lightning and switching impulse, temperature rise), and sometimes special tests (partial discharge, FRA, sound level, OLTC mechanical tests). Oil tests (BDV, moisture, DGA baseline) and leak checks are also carried out. Test reports are provided to utilities as part of FAT documentation before shipment.
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