3 Phase Motors

Servicewiz_2

I am very interested in any information that can be obtained on the resistance reading (OHMS) on three Phase A/C motor windings.Any help is greatly appreciated!!!
Servicewiz

Dave_22

Resistance

It kind of hard to say an exact number. Typically low .5 to 2 ohms phase to phase. And you BETTER read infinite from phase to ground or extremely high if your using a megger.

Victor H Plank

> I am very interested in any information that can

> be obtained on the resistance reading (OHMS) on

> three Phase A/C motor windings.Any help is

> greatly appreciated!!!

> Servicewiz




The readings L1-L2, L1-L3, L2-L3 should all be the same and above zero...also check the three legs to ground.
Not really sure what you are looking for or why.


Vic Plank
Lancaster PA

John Starcher_4

> > I am very interested in any information that

> can _BR_ > be obtained on the resistance

> reading (OHMS) on _BR_ > three Phase A/C

> motor windings.Any help is _BR_ > greatly

> appreciated!!! _BR_ > Servicewiz

> _BR_ _BR_

>

> The readings L1-L2, L1-L3, L2-L3

> should all be the same and above zero...also

> check the three legs to ground. Not really sure

> what you are looking for or why.

>

> Vic

> Plank Lancaster PA

oil-2-4-6-gas

why do you want to know the ohms--test it static then test after operating and windings have expanded ----if you are trying to diagnos a motor going off on overload -there are a few more things to look at --contacts in line starter,wires going to it ,control panel ,wire connections,motor load ,phase inbalance----use the middle contact for the low leg --correct voltage within 10% of rating -etc...