UL508A about Servo Motors.

[MIG]

Hello, do 3 PH AC Servo Motors ( 1S Omron) follow the same rules as regular AC servo Motors? can I use Table 50.1 (UL508) to calculate FLC of Servo Motor? Thank you.

 

[tortuga]

Good question, Ill take a wag and say for three phase yes just use the three phase column.
50.2 for DC,
I have no idea what you'd use for Two Phase (windings which are displaced from each other by 90 degrees electrical) as 508A has always been silent on two phase.

 

[MIG]

Why DC? It is a 3PH AC Servo

 

[tortuga]

Why DC? It is a 3PH AC Servo

I was noting table 50.2 is for DC motors.

 

[MIG]

I was noting table 50.2 is for DC motors.

Yepp Table 50.1 for AC

 

[petersonra]

I suggest it should follow the same rules as variable frequency drives. A lot depends on why you are asking the question in the first place. Normally the answer is not going to impact the design of the panel anyway.