Industrial Alternator Maintenance & Service

Secure performance, reliability and long-term availability of your power systems

Nidec Power supports operators of critical power systems with reliable, customer‑focused industrial alternator maintenance services. Our approach combines OEM expertise, on‑site flexibility, and data‑driven diagnostics to help you reduce downtime, extend asset lifetime and secure production continuity.

What this means for you:

• Fewer unplanned shutdowns
• Clear visibility on the condition of your alternator
• Maintenance decisions based on facts, not assumptions

Nidec Power provides comprehensive industrial alternator maintenance services, covering the full lifecycle of your equipment - from initial commissioning to annual preventive maintenance, advanced diagnostics, mechanical interventions, and 24/7 emergency repair.

Our services are delivered on‑site or in workshop, by experienced specialists with OEM expertise on Leroy‑Somer™ and Kato Engineering™ alternators.

Request an intervention

 

Commissioning of Your Alternator

Starting with a properly commissioned alternator is the first step toward long‑term reliability.
We perform a complete on‑site commissioning service to confirm that your alternator is correctly installed, aligned and ready to operate safely under load.

What we do

• Mechanical and electrical installation checks
• Load tests under real operating conditions
• Static electrical measurements
• Dynamic measurements

Customer benefits

• Reduced risk of early‑life failures
• Immediate detection of installation or coupling issues
• A clear baseline reference for future maintenance and trending

You receive a documented snapshot of your alternator’s initial condition, enabling better lifecycle management from day one.

Request commissioning support

 

Annual Preventive Maintenance

Annual preventive maintenance helps you stay in control of your equipment - before issues impact production.

We carry out regular alternator health checks, combining static and dynamic measurements.
Recommended interval: every year or 8,000 operating hours

When your alternator is equipped with GenOSys, our connected monitoring system, some dynamic measurements may be reduced while maintaining a high level of condition visibility.

What we do

• Static electrical measurements
• Dynamic measurements during operation

Customer benefits

• Early detection of insulation, mechanical or thermal deviations
• Better planning of shutdowns and spare parts
• Lower total cost of ownership through predictive maintenance

Instead of reacting to failures, you gain time to decide.

Schedule annual maintenance

Bearing and Bushing Replacement

Bearings and bushings are critical wear components that directly impact reliability.
Based on measurement trends or as a preventive action every 3 years or 24,000 hours, we perform bearing replacement and bushing inspection under our service.



What’s included

• Alternator disassembly
• Replacement of bearings, seals and gaskets
• Inspection and servicing of bushings
• Optional shaft alignment

Customer benefits

• Reduced vibration and mechanical stress
• Lower risk of catastrophic failure
• Extended alternator service life

This intervention helps you avoid forced outages caused by progressive mechanical degradation.

Request bearing replacement

Partial Discharge Testing

Partial discharge (PD) testing provides deep insight into the health of your alternator insulation system.
We use PD measurements to evaluate deterioration in the insulation wall of stator windings and identify early warning signs.

Customer benefits

• Early identification of insulation ageing
• Clear assessment of operational risk, early deterioration or localised defects
• Actionable recommendations (monitor, clean, repair, rewind planning)

Partial discharge testing is a key tool for predictive maintenance, helping to prevent unexpected failures and costly downtime. This allows you to act before insulation failure occurs, rather than after.

Request partial discharge testing

On‑site Disassembly and Cleaning

When workshop overhaul is not possible, we offer on‑site disassembly, cleaning and full servicing of your alternator.
This solution is typically used for large units or constrained installations. 
Depending on operating hours, results of previous maintenance operations and annual trend evolution, it is recommended when the alternator cannot be transported to a workshop.

What to expect

• Heavy on‑site maintenance intervention
• Coordination with lifting contractors if required
• Maintenance depth adapted to site conditions & maintenance of the prime mover (for instance, no VPI)

Customer benefits

• Avoids complex and costly transport logistics
• Restores performance in highly contaminated environments
• Extends operational lifetime when workshop overhaul is not feasible

On‑site servicing can significantly restore performance and extend operational life in complex installations. We help you get the best possible outcome within your site constraints.

Important considerations
The maintenance level achievable on site is lower than in our workshops (e.g. no VPI process)

Discuss on‑site maintenance options

Emergency Rescue Intervention (24/7)

When your alternator is down, time matters.

Our teams switch immediately to emergency mode, combining rapid engineering analysis with fast field deployment to restore production as quickly as possible, bringing spare parts when required.

Examples of emergency interventions

• Temporary isolation of a faulty stator coil to allow degraded operation until the new stator is ready
• Full recovery after flooding, including disassembly, inspection, cleaning and recommissioning

Customer benefits

• Fast response supported by OEM engineering expertise
• Temporary solutions to keep production running
• Clear recovery and long‑term action plan

After the intervention, you receive a comprehensive report with measurements, conclusions, historical trends and recommendations - so you know exactly what comes next.

Request an emergency intervention