Transformer windings basic insulation tests (IR)

3 basic insulation resistance tests on a 1.25MVA 3.3/0.69kV Dyn1 dry type transformer. About to energise a new transformer for the first time or investigate an overcurrent or earth fault HV trip event, then these basic tests could be useful.
From design through to certification, let's give you a glimpse inside the world of the industrial electrical environment covering systems, networks & apparatus up to 33kV and down to 24VDC!
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