Can I run a 230V, 1ph motor by 230V derived from 440V Ph to Ph ?

Question

In some places the phase voltage drops so much that it becomes impossible to operate 230V 1phase motor. Some people derive 230V by connecting a 440/230V transformer. The primary side is connected in between phase to phase. Lighting loads are operated this way. My question is whether inductive loads can be operated this way without harming the motor/equipment ?

Thank Mr Kerry. I request you to go thru my question again. 230V derived from 440/415V by some means say transformer. The derived 230V is phase to phase and not phase to neutral. My question is whether a 230V single phase motor will operate at a 230V phase to phase voltage ?

I am sorry. The phase to phase voltage is 400V. The motor voltage is 230V.

Answer 1

No, 440 volts is not going to work with motors. I have to ask if you are referring to 440 volts 3 phase, from which electrical power is being derived for lighting. That is generally done in a 'Y' configuration, and the voltage is for fluorescent lighting, and is about 277 volts. To solve your problem I recommend that you buy a copy of "Ugly's Electrician Handbook". It will give you the information that you need. It is a yellow book, about 3"x5" in size.

Answer 2

If the source of your 230 V is a 460-230V transformer, you should be OK, but you keep referring to 440 V. If your phase voltage is indeed 440 V you will get 220V out of the transformer, which is about 10% under-voltage for a 230V motor. The motor will draw more than rated current, hand heat more, but should be able to handle the voltage OK, If your transformer has 5% taps below normal, or better yet a 10% tap below normal you would do well to make use of the taps to get closer to the motor's rating.
edit:
BTW 2:1 1φ transformers are used all the time for just this purpose. They usually have a center tap so you can get 110V out of them as well.

Answer 3

Yes!
You can run provided the transformer VA matches your motors VA ( thumb rule it should be 20% higher)

.........running. bye

Answer 4

you need a star connected 3 phase transformer,than you tap between the common point of all 3 phases (neutral) and pick any phase this will give you 240v