ALTERNATOR SALES
At Central Group, our certified alternator specialists will assess your application requirements to recommend and supply the optimal alternator solution. Whether you’re operating in challenging industrial environments or standard conditions, we ensure reliable performance, and maximum uptime backed by our 50+ years of expertise and official partnership with Leroy-Somer alternators UK.
We can supply alternators from all leading manufacturers including Leroy-Somer, Stamford and Mecc Alte.
LEROY-SOMER ALTERNATORS
LSA SERIES
Built for premium power generation, the LSA range delivers high efficiency, Class H insulation, and robust design, making it suitable for marine, grid-connected, and critical industrial systems.
TAL SERIES
Designed for telecom, commercial, and industrial markets, the TAL range offers compact, cost-effective alternators with optimised electrical performance, ideal for prime and standby power applications.
Alternator phases are determined by the number of coils in the stator. Three-phase-alternators produce more consistent power than single-phase alternators. Which one you need should be determined by the load or application.
Your alternators voltage determines
the types of devices or systems it can power.
Common voltage include:
480/277V, 440/254V,
220/127V, 208/120V
Single phase 240/120V 220/110V
Common voltage include:
346/600, 4100/2100, 13800/7620
Common voltage include:
3 phase 4160/2402V, 13800/7968V
INDUSTRIAL AND COMMERCIAL ALTERNATOR APPLICATIONS
• Data Centres
• Utilities
• Waste to energy
• Rental
• Universities
• Commercial Farms
• Marine
ALTERNATOR SERVICING
WE ARE THE UK’S ONLY KEY SERVICE PARTNER FOR LEROY-SOMER ALTERNATORS
At Central Group we have direct access to a full range of genuine OEM products, components and spare parts – all fully compliant with Leroy-Somer specifications – This privilege, combined with our team of authorised engineers results in fast and certified repairs, improved maintenance and service as well as an increased dependability on your asset in the long run.
We offer both on-site and off-site alternator repair services, delivered by our team of fully trained engineers. Repairs are carried out either on your site or in our fully equipped workshop at Kitling Road, Knowsley, Merseyside.
REPAIRS & SERVICING
- Re-fitting, installation & commissioning
- Preventative & remedial maintenance
- Vibration measurements & investigations
- Investigations & diagnostics
- Inspection & repair
- Bearings – Replacement & mechanical checks
- Windings – Visual inspection & resistance measurement
- Reconditioning – stator rewinding, dipping impregnation / VPI
- Finish – External cleaning, overhaul acceptance testing, complete repaint.
- Re-fitting, installation & commissioning
- Cleaning & oven drying
- Preventative & remedial maintenance
- Vibration measurements
- Investigations & diagnostics
- Inspection & repair
- Dynamic Balancing
RENTAL MARKET – REPAIRS AND SERVICING
Central Group is certified to repair and service rented Leroy-Somer alternators, trusted across industries for their reliability and performance. Rental alternators often operate in demanding environments and are often pushed to their limits – making regular servicing essential to prevent unexpected failures and downtime.
Our repair and servicing process is built around stringent timelines and high standards, ensuring your alternator is restored quickly and efficiently. Backed by the legacy and expertise of Leroy-Somer, we guarantee fast turnaround times without compromising on quality—so your assets are back up and running with minimal disruption.
SERVICE DETAILS
INSPECTION LEVEL 1
- Offload at Central Group workshop
- Visual inspection and photograph, recording damaged or missing parts
- Removal of rotor
- Basic Static Tests (rotor and stator) with Megger & Digital Multimeter
- Remove bearing(s) and check for signs of wear and/or mechanical looseness
- Provide Inspection Level 1 report findings
STANDARD REPAIRS
- Supply and fit replacement bearing(s)
- Supply and fit replacement diodes
- Supply and fit replacement varistors
- Apply enveloping varnish
- Assemble unit
- Final testing of assembled unit
- Repair report
- Palletise unit ready for collection
INSPECTION LEVEL 3
- Items listed in Inspection Level 1 process
- Pressure wash, stove, stator and rotor windings
- Mechanical tolerance checks on housing, journals, keyways and couplings as required
- Baker surge test on rotor and stator windings
- Provide Inspection Level 2 report findings
OPTIONAL EXTRAS
(not included as standard)
- Remove alternator from canopy and refit on completion of work
- Store canopy / store canopy for repair period
- Rewind rotor
- Rewind exciter
- Dynamically balance rotor
- Remedial mechanical repairs as identified in Inspection Level 2
- Double impregnate and stove (rotor and stator)
- Epoxy coat windings
- Addition requested work
ALTERNATOR REPAIRS &
SERVICING FORM
Please click on the image to download and print our Rental Alternators Repairs & Servicing Form. Fill it out and attach it to your alternator before delivering it to our workshop.
