Discuss one for tony. demag jib hoist in the Commercial Electrical Advice area at ElectriciansForums.net

joel89

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heyup tony, stripped one of our demag jib hoists down suspect contactor welded in, and i have found what appears to be a double "coil" contactor A1 , A2, B1, B2. the motor is a 2 speed hoist, with another contactor mounted at the side 2phase in from the double coil contactor dead side and 4 pole's or phases out of the bottom,

could you at all enlitement me seems a little over complicated for a 2 speed up and down? also these contactors guess they are a special with a double coil??

cheers
 

Reply to one for tony. demag jib hoist in the Commercial Electrical Advice area at ElectriciansForums.net

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