Hello and good day to all technology and electric motor repair enthusiasts. Today, we present you with an exceptional video that delves into the precise reconstruction of a massive MV electric motor from the renowned brand ABB. This electric motor, which faced a connection failure in one of the rotor coils, underwent a complex repair operation.
We have captured this process from the moment the electric motor enters our workshop until it returns to peak performance. You will witness the replacement of the defective copper screw, the reconstruction of the rotor connections, and the replacement of the NU238 roller bearing. Additionally, all the insulation stages with HI VOLTAGE tape are meticulously displayed.
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Important video timings:
00:00 Removing the defective copper screw
01:18 Manufacturing the replacement copper screw
06:12 Cutting the defective parts of the previous connection
07:28 Removing the roller bearing NU238
08:26 Insulating the new copper screw
09:37 Installing the new connecting screw
10:02 Megger test
10:25 Welding the connection between the new copper screw and the coils
12:33 Insulating the rotor connection
21:54 Installing the new NU238 roller bearing
25:19 Installing the rear cover of the electric motor
31:38 Installing the ring on the shaft
33:59 Installing the carbon brush holders
35:52 Fitting the carbon brushes
36:06 Installing the rotor connections
37:46 Insulating the connections
43:10 Installing the end cap
44:15 Installing the cooling fan
46:55 Installing the end filters
Join us on this repair journey and witness our team’s unparalleled skills in bringing this electric motor back to life. Enjoy the video!

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