Answer / wareagle

Because the motor starting current and the other loaad is
more that the breaker can handle. You did not list the
motor size of the breaker size.

Answer / asif.k64@hotmail.com

Also check if the motor starter is working properly and APFC
panel is off while generator starts, check the fault codes
on the breaker if you have an ACB connected in the AMF panel.

Though there could be many other reasons as well but I would
rather check these things as well.

Answer / r.shanmugasundaram

Induction furnace controller is basically a rectifier cum
Inverter. Generally Rectifiers will generate Harmonics.
Suppose if the DG is not selected to accomodate this non
linear load then the sinusoidal wave form gets distorted
and will trip the DG set or other connected loads which
involves electronic circuitry. May be you can check
with an oscilloscope how the sinusoidal wave pattern
changes when Furnace is switched On. Suppose if the wave
form distortion does not happen then ther could be some
other reason

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