i have 380/480volts 50-60 hz 7.5 kw 3 phase AC motor pump. my power supply is only 208 vac. while running it gives only 19 amps for each phase, but the motor is very very hot.
you are using the 'extra'' legg off the transformer to get the 208 volts. why? the motor takes 3 hot leggs not 2. Get an electrician to wire it correctly.
It could be many ... 1. in my mind is ..it's low on refrigerant. U need a service call from a qualify Tech for that . 2. Ur motor is worned. 3. Incorrect wiring. (The question is was it working ok, before? 4. Motors do get warm, are u sure it's running hot?
Three phase motors are suitable for any application where 3-ph power is available and the motor is intended to be permanently installed rather than plugged in when needed. Three phase motors are widely available in ratings from 1/4 horsepower to 500 horsepower. Smaller and larger 3-ph motors are available from some suppliers, but may need to be specially ordered. Three phase motors are more efficient, less complicated and more reliable than single phase motors. They provide higher starting torque, but that is not needed for fans or most pumps. Single phase motors are not easily available is sizes larger than about 10 horsepower. Three phase motors can be used with variable frequency drives (VFDs) to provide adjustable speed operation. Controlling air or liquid flow by controlling the speed of a fan or pump is more efficient than using dampers or throttling valves.
480V (3Phase)motor will not work in 208V (single phase)system
