Megga readings on a motor

Using my hand cranked megger; I would expect > 20MOhm for both. I would imagine this is < 500 V as it's an old bakelite cased Megger model.

Alan

When I borrow a megga it has nice instructions in the lid, and the dial has a green section on it for each test.

hth Dave

hi it sounds like you have a open delta if your motor wont run you have to mark the three wires from the star point A1/B1/C1 find the other end that was used as the input side of the 415v and mark these as A2/B2/C2 for star 415v you link a1,b1,c1 and put power on a2,b2,c2.for 220v you link a1 to c2/ b1 to a2/c1 to b2 and then you can run you inverter hope this helps kevin

Thanks for making me think.

I had brought the star point out and cut the wires but connected eac coil to one phase of the output. Sorted now though. Really iratating as i have set them up as work in a old job 15 years ago no problem. Always had the benifit of 6 termina motors with links then.

Steve Larne

-- Steve Larne

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