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Variable resistor 3 labeled R3 adjusts the relay circuit which trips the main breaker CB1. Adjustment is covered in the -34 manual. A 5 hp compressor on 240 volts should not trip CB1 on a MEP 003a. That is less than 20 amps running, the generator will drive 50+ amperes constant...

The breakers on the 002/003a units are adjustable. It is possible some units may be out of adjustment. Breakers protect wiring from shorts, an 003 should be able to start an unloaded 10 hp three phase motor without tripping breakers. Most tools start unloaded, even air compressors. Air...

Easily. Inrush is the response to inertia, the 003a has a huge rotor permanently coupled to that 140 cubic inch Onan diesel. There are two huge flywheels on this engine, all of which will power through the inrush. As long as the equipment powered by the motors isn't loaded!! The only issue...