Suitable replacement for THERMAL MAGNETIC OVERLOAD SWITCH on pottery wheel

Thread Starter

jimjam12345

Joined Oct 12, 2023
4
Hello, fairly new to all this but done my best to get to this stage!
Im repairing a pottery wheel and am looking for a modern replacement for a STOPCIRCUIT GDU-2U-73-P1. As i understand this is a panel mount 2a, trip curve c, circuit breaker with an auxiliary contact.
Looking through spec sheets this e-t-a 3400-P10-H-SI-2A seems to be very similar but has a slightly different trip curve. If anyone could advise me if this would function similarly or recommend a more suitable part, I'd greatly appreciate it!

Circuit diagram included below if that helps!
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MaxHeadRoom

Joined Jul 18, 2013
28,513
What is some times done to achieve this is to use the O/L that fits on the bottom of a 3ph contactor which may be more readily available.
The N goes through one of the phases, and the other two use the L1 conductor to go through the second termination and loop up to go through the third phase terminal.
Both exiting the bottom of the unit.
The O/L's are settable, you would need to know the current range required for your motor.

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Thread Starter

jimjam12345

Joined Oct 12, 2023
4
Ah I see thank you, I'll take a look tomorrow work out which one would be appropriate! Would I then use an auxiliary contact to turn off the feild coils or do I not need to worry about them staying on in the event of the armature tripping?
 

MaxHeadRoom

Joined Jul 18, 2013
28,513
If the field coils remain powered it should be OK,
The reverse could be a disaster!
If you lose the fields, the motor can run away to destruction! :oops:
 
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