REPAIR OF LOW-VOLTAGE ELECTRIC MOTORS

"Mechanic Pavlograd" LLC carries out capital and average repairs of all types of electric machines up to 6 kV of domestic and imported production of general industrial and explosion-proof design, both with "bulk" and with rigid winding.

High-quality and timely repair of electric motors allows you to maintain its technical parameters in accordance with the requirements of TU U 33.1-40610832-002:2021 and extend the service life of the electric motor.
Strict compliance with technological standards is an integral part of performing electrical machine repair work.
The complex of repair works includes:
• dismantling, cleaning, defecting of assembly units and parts;
• dismantling of the old winding without deterioration of the magnetic properties of the active iron;
• restoration of the case (explosion-proof shell) and parts to the required level of explosion protection;
• restoration of the level of explosion protection of the case and parts of the explosion-proof shell;
• hydraulic testing of explosion-proof electric motor casings;
• repair or manufacture of stator and armature winding sections, their arrangement;
• repair of the package of active iron of the stator and rotor;
• repair or manufacture of pole coils;
• repair or manufacture of the collector;
• repair of the brush assembly in crane electric motors with a phase rotor and DC machines;
• restoration of the geometric shape of the shaft surface, keyway, cutting or making a new rotor shaft (if necessary);
• repair or manufacture of bearing shields;
• replacement of bearings; • repair or manufacture of the fan and fan casing; rotor balancing;
• impregnation of windings with varnish or compound (insulation class B, F you H)
• assembly of the electric motor with replacement of bearings, through insulators, brushes and brush holders, plastic or rubber elements, fasteners;
• acceptance tests: measurement of DC winding resistance, measurement of the insulation resistance of the winding relative to the case and between the windings and the absorption coefficient, conducting high-voltage insulation tests, checking for the absence of inter-turn short circuits, idle test.
We eliminate all kinds of mechanical damage, winding breaks and phase-to-phase short circuits, destruction of the track or the rolling element, incorrect position of the stator and rotor, as well as the brush and many other malfunctions.
At the request of the customer

– modernization of engines with power changes, rotation frequency and supply voltage.

NOMENCLATURE OF REPAIR OF LOW VOLTAGE MOTORS:

Asynchronous electric motors of general industrial performance: with a short-circuited rotor AT, A02,4AN, 4AR, 4FOOD, DP, AIR, AIRU, AMU, MTKN, MTKF; multi-speed three-phase AMU series, 4AMU; with MTF phase rotor, MTN, AKI, MTM.
Explosion-proof for voltage up to 1140 AT: with a short-circuited rotor of the 2VR series, GRP, ZVR, VRM, AIU, Media, BA02, ONE, EDCOF, MA, AIUM, WHO, COM, EDKR(AT); with a phase rotor of the VRK series, VAOK, MA-36.
Explosion-proof electric motors for driving coal mining machines (combine harvesters, plows, etc): EDC, EQ, EDCO.
Direct current electric motors: DRT, MEAT, EDR, DP, P, DTN, 4PFM, PM, D, 2P, PC.
Roller electric motors: ARM, ARF, VRR, AUG, AZRF, AR.
Quarry electric motors and generators: SDE, DPE, D, VAT, DE, DP E, AE, ED, NB, DPA, MEAT.
Electric motors, aggregates and generators for railway transport: DT-701-4, DT-708-4, MW-25-9, MW-25-11, P-41, TMN-10B, GS225M4, ED-118, ED-107 , DP-300B.