“If I were to use it more heavily I think I would install an IEC type bimetal starter and back off the current adjustment until it tripped in normal
use, then turn it up a little.....? Is this sound thinking?”
Not entirely. You might have to wait a LONG LONG time for it to trip in normal use.
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For most IEC overloads, the value you set the dial to? IS the nameplate FLA. The dial it up a bit is “built in”.
I am attaching in line a graphic (I am not sure how it will display in the group)
a curve set for a typical Class 10 Motor overload (set at 3A), with a motor start curve for a 3A motor.
Also shown is a typical 15Amp circuit breaker, and cable damage curve for Awg 12 wire.
The adjustment on the MOL moves that curve set L-R, and not up and down.
The motor curve assumes the motor is essentially stalled for ~2 seconds.
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R James (Jim) Klessig P.E. | Senior Power Systems Engineer |
Electrical Reliability Services, VERTIV
jim.klessig@...,
jim_klessig@...
1876 Gwin Rd, Mckinleyville | CA | 95519 | USA
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Cell (707) 497-9611 |
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