Overhaul

Overhaul of low voltage/high voltage AC motors and generators

SNR provides overhaul services for all brand of AC motors and generators with rating from fraction to 15MW at in-house and on-site service up to 950MW.

It conducts all electrical tests such as PI Megger, HIPOT, surge, insulation resistance, winding resistance and ring test on stator coil for hot spot. It also conducts no load run test with high voltage. All the tests results are presented with service reports to customers.

SNR conducts other tests such as radiograph test on rotor bars, trueness test on rotor shaft and dynamic balance test on rotor.

Overhaul/Rewinding of DC shunt, series motor, traction motor and generator

SNR provides overhaul and rewinding services for all brand of DC shunt, series motor and generators particularly GE 752, Toshiba, Gulf, SIEMENS, Mitsubishi traction DC Motor and other brand of DC shunt, series motor and generator.

It conducts all electrical test such as voltage drop test on field & interpole coils, bar to bar test on armature, DC HIPOT test (after overhaul and varnish), neutral position check on other DC motors, bearing play test and no load test run.

It uses 15% silver alloy for brazing the joints after rewind/overhaul of the field coil, interpole coils and armature, under cut and deburr the commutator after machine off. It also services the carbon brush holder and ARMs. All the frames are treated with 40,000psi water jet and applied with epoxy primer & epoxy painting.