600VAC System--> 575VAC motors
600VAC System--> 575VAC motors
(OP)
I requested a motor for a 600VAC 3-phase (Canada) system and received from the manufacturer a 575VAC 3-phase motor. I'm wondering if 575V is the right voltage in this case, and if so why?





RE: 600VAC System--> 575VAC motors
RE: 600VAC System--> 575VAC motors
For a nominal 480V system, motors are 460V, for a 240V system, 230V and for a 208V system, 200 volts.
RE: 600VAC System--> 575VAC motors
RE: 600VAC System--> 575VAC motors
5 x 120 = 600 V nominal system voltage
5 x 115 = 575 V motor voltage (utilisation equipment)
For the 480 V system , it is:
4 x 120 = 480 V nominal system voltage
4 x 115 = 460 V motor voltage (utilisation equipment)
I hope that is clear.
RE: 600VAC System--> 575VAC motors
600 modula 120 = 480 modula 120 = 575 modula 115 = 460 modula 115 = 0.
No, not really clearer. I just could resist using someone's handle in a valid equation.
RE: 600VAC System--> 575VAC motors
RE: 600VAC System--> 575VAC motors
RE: 600VAC System--> 575VAC motors
As far as nameplate voltages, ANSI C84.1-1995 has some historical information.
There may be a companion standard like ARI 110-2002.
RE: 600VAC System--> 575VAC motors
The motor terminal voltage is lower than the system voltage. It is assumed that there will be voltage drop in the motor feeder and upstream. Often, there is a reference to 2% voltage drop reserved for buses or feeders and 3% voltage drop reserved for branch circuit.
NEMA Std sets the motor terminal voltages. The European systems, e.g. 380V three phase has aligned motors with the motor terminal voltage of 380V. This means that the 380V is expected at the motor terminals, or receptacle for the motor cord.