Is there a specific direction of generator shaft rotation, clockwise or counter clockwise, that needs to be adhered to for Marathon generators to operate properly?
A. All standard Marathon synchronous generators products including LIMA®MAC, MAGNAPLUS, MAGNAMAXDVR, MAGNAPOWER, and Pancake are fitted with bi-directional fans, and are designed to operate properly without harm, with the shaft rotating in either a clockwise or counter clockwise direction. However, for three phase operation, all standard three phase Marathon generators have an A – B – C phase sequence when the generator shaft is rotating counter clockwise as viewed from opposite the generator drive end (viewed from the exciter end) unless otherwise required by a customer’s generator specification, or purchase order. For this reason, it is always a good and safe electrical practice to check the generator’s phase sequence to assure phase sequence compatibility with any electrical distribution system prior to initial closure onto the electrical load. If the generator’s phase sequence is opposite to the desired system phase sequence, the generator phase sequence can be changed (ie. From A
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