Motor Voltage Operation

Status
Not open for further replies.

wonda

Member
Location
Barbados
What are the disadvantages of a motor rated at 220V/50Hz/3ph operating on a 208V/50Hz/3ph supply (assuming a vd of 2% to the motor)?
Can a 230-v (3ph) rated motor run on a 208-v (3ph) supply or do I have to use a buck/boost transformer?
 
motor specs

motor specs

you would have to check with the motor specifications, most motors are rated to operate at +/- 10% voltage, so a 230V motor would operate normally up to 253V and down to 207V. With that being said It would not be a good idea (in my opinion) just because the minimum operating voltage of a 208V system could be as low as 187V. nominal 208V +/- 5% for voltage drop within the facility plus +/- 5% utility variations, so if you have a 208V system either use a motor rated for a 208V system or provide a buck/boost transformer depending on the size you could probally use two transformers connected in an open delta configuration to power a three phase only load, if you run the motor on a 208V system you could run into problems on utility and building voltage anomoniles. Just my 2 cents.
 
Yea I am sure of the supply voltage and frequency. Some of the older electrical people here run their 220V 3phase motors on the 208V 3phase supply but my research show that this reduces the life of the motor. If this is true by what percentage is the life of the motor reduced?
 
Status
Not open for further replies.
Top