when meggering a 3ph,480v oil reservoir heater on a regen gas compressor, why

when meggering a 3ph,480v oil reservoir heater on a regen
gas compressor, why do I get a reading to ground when
meggering phase to ground? shouldn't it read opened or is
there something that makes it read closed? on the same
heater, when ohming, it reads open. thanx

Question Posted / jackman5181

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when meggering a 3ph,480v oil reservoir heater on a regen gas compressor, why do I get a reading t..

Answer / k.prakashchandra

The resistance between phase to ground is in mega ohms if
star point is not earthed.

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