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Wagner electric asincronous H 100L4 1982 motor MK-250. Compressor will start, get up to pressure okay, but once pressure drops it will stall on restart and trip out mains.

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The overload trip is is not rated high enough for the load. When the compressor starts form zero pressure their is little load on the motor. It then pumps ok to the cutout pressure under gradually increasing load. When it tries to start on the intermediate pressure the load is too great as the motor drawers a higher current on start-up and has the additional load of the higher pressure. You have a 15 amp appliance running on a 10 amp circuit or similar depending on your countries supply voltage.

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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