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Three-phase motor faults — windings, bearings and the supply problems that destroy otherwise healthy machines. Most burnt-out motors were killed by something outside them, so these guides diagnose the installation as well as the machine, and set out honestly when a rewind is worth it and when it is not.
Three-phase squirrel-cage induction motors on direct-on-line, star-delta, soft-start and variable-speed drives
9 diagnostic steps · advanced · qualified electrician
Three-phase motors on direct-on-line, star-delta and soft-start control, with thermal or electronic overload protection
8 diagnostic steps · intermediate · qualified electrician
Three-phase squirrel-cage induction motors, foot and flange mounted, direct-on-line and drive-fed, driving pumps, fans, compressors and conveyors
8 diagnostic steps · intermediate · technician
Filed under another category, but they cover part of the scope above.
These guides are written so you can diagnose the fault yourself. If you would rather an engineer handled it, our mobile workshop covers all 47 counties.