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I have installed a 16 amp variable voltage regulator to control the voltage for a DC generator running at 6 amps, each time when I switched on the regulator, it trips both the breakers at the generator unit 32a) and also the house breaker and blows the fuse in the plug. If I disconnect the regulator and hard wire it from mains to the bridge rectifier (35a), everything works fine. Did I used the wrong voltage regulator or do I need something else like a speed controller etc ?