Heater Overloads Keep Tripping During Startup

assuming 3-phase motor, i'd check to see if you're missing a leg or if the contactor has burnt up one of the contacts. amp each leg with clamp meter.
 
E100 is a solid state OL relay. There is a trip indicator red LED on the front, it flashes a code to tell you why it tripped; one flash is OL, 2 flashes is phase loss, 3 is ground fault, etc. What is it flashing?

If it’s not flashing and is solid red, that means it’s a hardware fault, which can happen if there is severe voltage drop on startup. The E100 is self powered off of the line, so if the source is too weak and starting the motor causes the voltage to drop too much, it will fault the OLR.

Side issue: there is no “trip delay” that you can set for 30 seconds, that is probably the trip CLASS, and you should NOT be setting it to Class 30 unless this is a mill duty motor. Also, you should be setting the current setting to the motor nameplate FLC, not higher, even if the motor has a 1.15SF. The higher pickup point of the IL curve is ALREADY built into the relay. You are going to smoke that motor if it really does overload!

You really should RTFM…
 
Jraef said:
E100 is a solid state OL relay. There is a trip indicator red LED on the front, it flashes a code to tell you why it tripped; one flash is OL, 2 flashes is phase loss, 3 is ground fault, etc. What is it flashing?

If it’s not flashing and is solid red, that means it’s a hardware fault, which can happen if there is severe voltage drop on startup. The E100 is self powered off of the line, so if the source is too weak and starting the motor causes the voltage to drop too much, it will fault the OLR.

Side issue: there is no “trip delay” that you can set for 30 seconds, that is probably the trip CLASS, and you should NOT be setting it to Class 30 unless this is a mill duty motor. Also, you should be setting the current setting to the motor nameplate FLC, not higher, even if the motor has a 1.15SF. The higher pickup point of the IL curve is ALREADY built into the relay. You are going to smoke that motor if it really does overload!

You really should RTFM…
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Agree on the OL setting. For some OLs it’s motor FLA x 1.2. Some OLs you set the dial to the motor FLA. I used an industrial labeler to print a label with hp, motor amps, SF, and OL setting this label goes on inside of panel door
 
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