Motor oveload protection

[relbas]

My aplication is: 1 hp, 3 phase 208 v sump-pump inside the elevaitor pit.
Pump is automatic (internal float)
I do requier to protect the motor with overload relays.
Do I need to use magnetic starter? or I can wire my overloads in series with the cuircuit conductor without the contactor?

 

[augie47]

I can see no reason that this motor would not need overload protection.
It might be integral with the motor.
If not, you could use any means listed in 430.32B

 

[jim dungar]

Do I need to use magnetic starter? or I can wire my overloads in series with the cuircuit conductor without the contactor?

Very few, if any, motor overload relays actually open the power circuit when they operate; they are intended to be used with a contactor or starter.

For your application I would use a manual starter instead. The IEC style manual starters are physically not much bigger than an overload relay.

 

[CIECO]

Check the pump it probably has an internal overload