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Technicians performing electrical rewinding and repair on a motor

HT & LT Motor Rewinding and Industrial Repair Services

HT/LT motor rewinding, DC machine repair, generator and alternator rewinding for critical industrial equipment.

Punjab Electric Industries provides workshop-based and site-supported electrical repair, rewinding, refurbishment and testing services for industrial motors, generators, alternators and rotating electrical machines.

Complete Electrical Rewinding & Repair Capability

Repair, rewinding and refurbishment support for industrial rotating electrical machines.

Electrical machines used in power plants, cement plants, refineries, chemical plants, sugar units, mining operations, utilities and manufacturing facilities operate under heavy electrical, thermal and mechanical stress. Over time, winding insulation, coils, bearings, rotors, stators, commutators and associated assemblies may fail due to overheating, moisture ingress, contamination, overloading, vibration, insulation ageing or repeated operational stress.

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PEI supports such requirements through structured inspection, fault assessment, rewinding, insulation rebuilding, mechanical correction, testing and final quality clearance. The focus is not only on restoring the machine, but on improving reliability wherever technically possible through correct winding practices, insulation selection, VPI / varnishing support, mechanical checks and testing-backed repair.

Complete Electrical Rewinding & Repair Capability

KEY SERVICE AREAS

DC Motor Repair

HT Motor
Rewinding

Rotor Repair

LT Motor
Rewinding

Squirrel Cage Motor Repair

DC Motor
Repair

Interpole Coil Repair

AC/DC Generator
Repair & Rewinding

Field Coil Rewinding

Alternator
Rewinding

Brush Gear Inspection & Repair

Slip Ring Motor
Repair

Armature Rewinding

Stator
Rewinding

Stator Rewinding

Squirrel Cage Motor Repair

Slip Ring Motor Repair

Rotor
Repair

Alternator Rewinding

Armature
Rewinding

AC/DC Generator Repair & Rewinding

Field Coil
Rewinding

Repair, rewinding and refurbishment support for industrial rotating electrical machines.

Schrage Motor 
Repair

HT Motor Rewinding

Interpole Coil
Repair

LT Motor Rewinding

Commutator Repair / Maintenance

MACHINE-SPECIFIC SERVICE COVERAGE

Focused repair and rewinding support based on machine type and failure condition.

Electrical Rewinding Services For motors, generators and alternators requiring repair, rewinding, refurbishment or performa

01

HT Motor Rewinding

Suitable For:

High-tension motors used in power, cement, refinery, chemical, mining and heavy industrial applications.

PEI Can Handle:

  • HT stator rewinding

  • Coil replacement

  • Insulation rebuilding

  • Slot insulation and phase insulation

  • Class F / Class H insulation systems

  • VPI / varnishing / baking support

  • Rotor inspection support

  • Bearing and mechanical checks

  • Surge, IR, PI, HV & other applicable tests

  • No-load testing, where applicable

  • Final inspection and documentation

Common Requirements:

  • Earth fault

  • Shorted turns

  • Insulation failure

  • Overheating

  • Low IR value

  • Winding burnout

  • Repeated tripping

  • Moisture ingress

  • Shutdown-based repair

Industrial alternators used in captive power, backup generation and heavy electrical applications.

05

Generator Rewinding

Suittable For:

Industrial generators used in power generation, backup power and process-critical applications.

PEI Can Handle:

  • Generator stator rewinding

  • Rotor and field winding support

  • Coil replacement

  • Insulation rebuilding

  • VPI / varnishing / baking support

  • Winding resistance check

  • IR / PI testing

  • HV testing, where applicable

  • Surge testing, where applicable

  • Final inspection and documentation

Common Requirements:

  • Winding insulation failure

  • Generator heating

  • Earth fault

  • Low IR value

  • Coil damage

  • Failure after long operation

  • Shutdown repair requirement

Commutator Repair / Maintenance

02

LT Motor Rewinding

Suitable For:

Low-tension industrial motors used in pumps, fans, blowers, conveyors, compressors & auxiliary plant equipment.

PEI Can Handle:

  • LT stator rewinding

  • Winding removal and rewinding

  • Slot preparation

  • Insulation replacement

  • Varnishing and baking

  • Bearing inspection

  • End cover and mechanical checks

  • IR / Megger testing

  • Winding resistance checks

  • No-load test, where applicable

  • Final inspection

Common Requirements:

  • Burnt winding

  • Motor heating

  • Phase failure

  • Low insulation resistance

  • Bearing-related damage

  • Noise / vibration issue

  • Rewinding after overload condition

Industrial generators used in power generation, backup power and process-critical applications.

06

Alternator Rewinding

Suittable For:

Industrial alternators used in captive power, backup generation and heavy electrical applications.

PEI Can Handle:

  • Alternator stator rewinding

  • Rotor inspection support

  • Field winding repair support

  • Coil replacement

  • Insulation strengthening

  • Varnishing / baking support

  • Electrical testing and inspection

  • No-load / operational checks, where applicable

Common Requirements:

  • Alternator not generating proper output

  • Stator winding failure

  • Rotor field issue

  • Insulation breakdown

  • Heating

  • Low IR value

  • Coil damage

High-tension motors used in power, cement, refinery, chemical, mining and heavy industrial applications.

03

DC Motor
Repair

Suitable For:

Industrial DC motors used in variable-speed drives, process lines, cranes, mills and heavy-duty applications.

PEI Can Handle:

  • Armature rewinding support

  • Field coil rewinding

  • Interpole coil repair

  • Commutator inspection and

  • maintenance

  • Brush gear inspection and repair

  • Insulation checks

  • Bearing and mechanical inspection

  • Armature balancing support

  • Electrical testing after repair

  • Assembly and final inspection

Common Requirements:

  • Sparking at brushes

  • Commutator wear

  • Flashover

  • Field coil failure

  • Armature winding fault

  • Brush gear issues

  • Low insulation resistance

  • Heating or vibration

DC generators used in industrial, auxiliary and specialised electrical applications.

07

Slip Ring Motor Repair

Suittable For:

Slip ring induction motors used in cranes, mills, crushers, conveyors and heavy starting-torque applications.

PEI Can Handle:

  • Stator rewinding

  • Rotor winding inspection and repair support

  • Slip ring inspection

  • Brush gear inspection

  • Insulation checks

  • Bearing and shaft inspection

  • Rotor balancing support

  • Testing after repair

​

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Common Requirements:

  • Burnt winding

  • Motor heating

  • Phase failure

  • Low insulation resistance

  • Bearing-related damage

  • Noise / vibration issue

  • Rewinding after overload condition

Low-tension industrial motors used in pumps, fans, blowers, conveyors, compressors & auxiliary plant equipment.

04

DC Generator Repair

Suitable For:

DC generators used in industrial, auxiliary and specialised electrical applications.

PEI Can Handle:

  • Armature winding repair

  • Field coil repair

  • Interpole coil repair

  • Commutator maintenance

  • Brush gear inspection

  • Insulation rebuilding

  • Mechanical inspection

  • Testing and final quality checks

Common Requirements:

  •  Armature fault

  • Field failure

  • Commutator damage

  • Brush sparking

  • Insulation weakness

  • Bearing or mechanical noise

Industrial DC motors used in variable-speed drives, process lines, cranes, mills and heavy-duty applications.

08

Squirrel Cage Motor Repair

Suittable For:

Squirrel cage induction motors used in pumps, fans, compressors, blowers, conveyors & industrial applications.

PEI Can Handle:

  • Stator rewinding

  • Rotor condition inspection

  • Bar / end-ring observation, where applicable

  • Bearing replacement support

  • Shaft and end cover checks

  • Varnishing / baking

  • IR / Megger testing

  • No-load testing, where applicable

​

​

Common Requirements:

  • Burnt stator winding

  • Motor heating

  • Bearing damage

  • Rotor rubbing

  • Low insulation resistance

  • Noise / vibration

  • General overhauling requirement

COMMON FAILURE CONDITIONS HANDLED

Electrical and mechanical issues that commonly require rewinding or repair intervention.

Slip ring induction motors used in cranes, mills, crushers, conveyors and heavy starting-torque applications.

Electrical Failures

  • Winding burnout

  • Earth fault

  • Shorted turns

  • Phase-to-phase fault

  • Phase failure damage

  • Low insulation resistance

  • Poor Polarization Index

  • Insulation ageing

  • Corona / tracking-related insulation stress, where applicable

  • Coil damage

  • Loose winding / coil movement

  • Moisture ingress

  • Contamination inside winding

Squirrel cage induction motors used in pumps, fans, compressors, blowers, conveyors & industrial applications.

Mechanical / Operational Issues

  • Bearing failure

  • Rotor rubbing

  • Shaft-related issue

  • End cover / end shield damage

  • Fan or cooling issue

  • Excessive vibration

  • Abnormal noise

  • Overheating

  • Air gap irregularity

  • Coupling / fitment issue

  • Brush and commutator sparking in DC machines

HT motor rewinding for winding burnout, earth fault, shorted turns, insulation failure and coil damage.

Site /
Maintenance Conditions

  • Emergency breakdown

  • Planned shutdown repair

  • Repeated tripping

  • High temperature operation

  • Long-idle machine revival

  • Pre-commissioning inspection

  • Preventive maintenance repair

TESTING & QUALITY CHECKS

Relevant inspections and tests are selected based on machine type, voltage class and repair scope.

HT motor repair for bearing failure, rotor rubbing, overheating, vibration, shaft damage and cooling issues.

Electrical
Tests

  • Insulation Resistance/Megger Test

  • Polarization Index Test

  • Winding Resistance Test

  • Surge Comparison Test

  • AC High Voltage Test

  • DC Hi-Pot Test

  • Tan Delta Test, where applicable

  • Capacitance Test, where applicable

  • Coil Testing

  • No-Load Test, where applicable

  • Current Balance Check

  • Final electrical inspection

Mechanical and operational checks after HT motor rewinding, including bearing inspection, air-gap verification, rotor movemen
HT motor rewinding and repair support for emergency breakdowns, shutdown maintenance, repeated tripping and machine revival.

Mechanical & Operational Checks

  • Visual inspection

  • Dimensional checks

  • Air gap checking

  • Bearing condition check

  • Shaft condition observation

  • End cover / end shield inspection

  • Coupling fitment observation

  • Vibration check

  • Noise observation

  • Heating observation

  • Rotation direction verification

HT motor-specific quality checks covering coil connections, phase balance, insulation integrity, slot fitment, winding cleara
HT motor rewinding and repair support for emergency breakdowns, shutdown maintenance, repeated tripping and machine revival.

DC Machine Specific Checks

  • Commutator condition inspection

  • Brush gear inspection

  • Brush holder condition

  • Brush contact observation

  • Spring pressure observation

  • Interpole and field coil checks

  • Armature inspection and balancing support

Final quality clearance of an HT motor after rewinding, electrical testing, mechanical inspection and documented performance
Electrical testing of an HT motor after rewinding, including insulation resistance, polarization index, winding resistance, s

Quality Clearance

  • Repair scope verification

  • Test result recording

  • Final inspection clearance

  • Customer inspection support, where required

  • Dispatch readiness confirmation

HT motor electrical testing after industrial motor rewinding, including insulation resistance, polarization index, winding re
Inspection of HT motor stator windings, formed coils, slot insulation, phase separation, coil overhangs, lacing, wedges and t
Mechanical and operational inspection after HT motor rewinding, including rotor rotation, bearing condition, shaft alignment,
Surge comparison and winding resistance testing of a rewound HT motor stator to detect shorted turns, coil imbalance, incorre
Testing of HT motor winding insulation using insulation resistance, PI and high-voltage test procedures after rewinding, insu

Send Motor Details for Technical Review

Share nameplate photos, machine rating, voltage, RPM, fault condition and required timeline for a technical response.

Email

punelect@gmail.com

Call PEI Team

9610447170
7678133758

Address

F-50,Opp. Multimetals Ltd., Chambal Industrial Area, Kota, Rajasthan - 324003

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© 2026 by Punjab Electric Industries.

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