The cost-effective and reliable alternative to new motor construction. Modernization, overhaul, and efficiency upgrading up to 25 MW & 13.8 kV.
When routine maintenance and basic repairs are no longer sufficient to keep severe-duty industrial drives running, purchasing a newly constructed motor can be both capital-intensive and time-consuming. MENZEL Elektromotoren provides global industrial operators with a proven, highly efficient solution: precision reconditioning and complete engineering overhauls for high-voltage, low-voltage, and direct current (DC) electric motors.
As an established German manufacturer of large electric drive systems since 1927, MENZEL combines specialized OEM expertise with an advanced in-house motor factory in Berlin. Our engineers precisely diagnose component wear, recalculate active parts, and execute complete overhauls that match or exceed original factory parameters — backed by full manufacturer guarantees.
Every reconditioned motor undergoes a rigorous engineering and quality-assurance protocol within our state-of-the-art manufacturing facility in Germany.
Complete mechanical teardown followed by industrial high-pressure and chemical cleaning of stators, rotors, housings, and terminal boxes to clear all surface contaminants.
Thermal drying in vacuum-circulated furnaces, complete rewinding of stator and rotor coils, and high-voltage Vacuum Pressure Impregnation (VPI) with Class H insulation systems.
Dynamic dynamic multi-plane balancing of assembled rotors and shafts, re-turning and micro-finishing of slip rings or commutators, and complete bearing re-dimensioning.
Custom adaptations including shaft diameter re-machining, foot-to-flange conversions, terminal box repositioning, and retrofitting external cooling fans (IC01, IC411, IC611, IC81W, IC511).
Installation of modern condition monitoring devices including PT100 / PTC temperature sensors, SPM vibration monitoring sensors, and digital incremental encoders for variable speed operation.
Complete electrical and mechanical routine/load testing at our internal test bay in compliance with EN 60034, followed by customized industrial protective painting for harsh environments.
MENZEL overhauls, modernizes, and tests heavy industrial electric drives matching international compliance standards.
| Parameter | AC Squirrel Cage Motors | AC Slip Ring Motors | Industrial DC Motors |
|---|---|---|---|
| Power Output Range | 75 kW up to 25,000 kW (25 MW) | 75 kW up to 20,000 kW (20 MW) | 20 kW up to 2,000 kW |
| Voltage Range | 220 V up to 13,800 V (13.8 kV) | 220 V up to 13,800 V (13.8 kV) | 160 V up to 1,000 V |
| Cooling Types | IC 01, IC 411, IC 611, IC 81W, IC 511 | IC 01, IC 411, IC 611, IC 81W, IC 511 | Fully enclosed, forced-ventilated |
| Enclosure Protection | IP23, IP55, IP56, IP65, IP67 | IP23, IP55, IP56, IP65 | IP23, IP54, IP55 |
| Explosion Protection | Ex ec, Ex tc, Ex p (Pressurized) | Ex ec, Ex tc | Custom hazardous area designs |
| Compliance Standards | IEC / EN 60034, VDE 0530, DIN, ISO 9001:2015 Certified Manufacturing | ||
All mechanical, electrical, and thermal processes are performed in-house at our Berlin plant to minimize overall lead time.
By recalculating stator/rotor magnetic circuits, legacy motors are retrofitted to meet higher energy efficiency ratings.
Experienced field technicians available worldwide for on-site disassembly, commissioning, alignment, and vibration testing.
Clients are invited to inspect live motor load testing at our state-of-the-art test bay prior to dispatch.
Submit your motor rating plate details, fault descriptions, or mechanical drawings. Our senior drive engineers will promptly provide a technical assessment and competitive quote.
Send an Inquiry