Abstract: A dynamoelectric machine 20 includes a rotor assembly 24 and a main lead insulating assembly 26. The rotor assembly 24 includes a shaft 28 having a main lead receiving recess 32 in its outer surface, a rotor 30 mounted to the shaft 28, and a stator 22 surrounding the rotor 30. The main lead insulating assembly 26 lines the main lead receiving recess 32 and includes at least one insulating bottom block 34 axially secured to the shaft 28 and at least one insulating sidewall block 40 secured to the at least one insulating bottom block 34 with at least one interlocking joint 42. A main lead 35 is received in the main lead insulating assembly 26.

Abstract: A dynamoelectric machine 20 includes a rotor assembly 24 and a main lead insulating assembly 26. The rotor assembly 24 includes a shaft 28 having a main lead receiving recess 32 in its outer surface, a rotor 30 mounted to the shaft 28, and a stator 22 surrounding the rotor 30. The main lead insulating assembly 26 lines the main lead receiving recess 32 and includes at least one insulating bottom block 34 axially secured to the shaft 28 and at least one insulating sidewall block 40 secured to the at least one insulating bottom block 34 with at least one interlocking joint 42. A main lead 35 is received in the main lead insulating assembly 26.

Abstract: A method for repairing stress-induced cracks in a generator rotor keyway is disclosed. The method comprises disassembling the retaining ring and ring key from the rotor, and machining away the crack and surrounding rotor metal from the rotor keyway. The machining step may be performed in a lathe or milling machine. This method diminishes the labor cost, equipment cost, and down time required for crack repairs because the slot contents may remain in the slots during the entire repair process. A spacer ring and an enlarged key that may be inserted into the machined, enlarged keyway are also disclosed.