Leroy Somer Alternator Parts for Diesel Generators
Leroy Somer (part of Nidec Group) is a leading manufacturer of alternators for power generation, with over 50 years of experience. Their LSA series alternators are widely used in standby, prime, and continuous power generator sets from 10kVA to 6000kVA. At Huaquan Power, we supply a full range of Leroy Somer alternator parts for LSA42, LSA44, and LSA46 series alternators.
AVR and Voltage Regulation Parts
- Automatic Voltage Regulators — R130, R150, R180, and D510 AVR units for precise voltage control
- AVR Accessories — Droop kits, quadrature droop CTs, and paralleling accessories for multi-set operation
- Voltage Adjustment Potentiometers — Remote voltage adjustment rheostats and potentiometers
- AVR Fuses and Protection — Replacement fuses and protection modules for AVR circuits
Rotating Diode and Excitation Components
- Rotating Diode Assemblies — Complete rectifier wheel assemblies for LSA42, LSA44, LSA46 alternators
- Individual Diodes — Positive and negative diodes for diode wheel replacement
- Surge Suppressors — Voltage transient protection devices for diode protection
- Excitation Coils — Exciter stator and rotor winding assemblies
- PMG Assemblies — Permanent magnet generator assemblies for shunt and AREP excitation systems
Stator and Rotor Assemblies
- Stator Assemblies — Complete stator winding assemblies for all LSA series alternators
- Rotor Assemblies — Main rotor assemblies balanced and ready for installation
- Bearings — Drive-end and non-drive-end bearings for Leroy Somer alternators
- Seals and Gaskets — Bearing retainer seals and O-rings for bearing housing
Terminal Box and Connection Components
- Terminal Blocks — Main output terminal blocks and connection bars
- Current Transformers — Protection and metering CTs for alternator output monitoring
- Anti-Condensation Heaters — Space heaters for moisture prevention during standby operation
- Cable Glands — IP55-rated cable entry glands for terminal box connections
Mechanical and Cooling Parts
- Cooling Fans — Axial cooling fan assemblies for proper heat dissipation
- Coupling Adaptors — SAE housing adaptors and flexible coupling discs
- Vibration Mounts — Rubber and spring vibration isolators for generator set mounting
- Air Filters — Intake air filter elements for enclosed alternator installations
Frequently Asked Questions
1. What Leroy Somer alternator models do you support?
We supply parts for Leroy Somer LSA42 (10-50kVA), LSA44 (50-300kVA), and LSA46 (300-6000kVA) series alternators. We also support the older LSA40, LSA43, LSA45 series and industrial MAC/LSA series.
2. What is the difference between shunt and AREP excitation?
Shunt excitation draws power from the alternator output for field excitation — simpler but less suited for high starting kVA loads. AREP (Auxiliary Winding Regulation System) uses separate auxiliary windings providing more stable excitation, better short-circuit capability, and improved motor starting performance.
3. How do I select the correct AVR for my Leroy Somer alternator?
The AVR selection depends on your alternator model and excitation system. R130/R150 for basic shunt systems, R180 for AREP systems, and D510 for advanced paralleling applications. Check the alternator nameplate for the standard AVR reference or contact our technical team.
4. Do you carry Leroy Somer rotating diode assemblies?
Yes, we stock rotating diode assemblies for all LSA series alternators. We supply complete rectifier wheel assemblies as well as individual diodes and surge suppressors for component-level repair.
5. What is the typical lifespan of a Leroy Somer alternator?
With proper maintenance, Leroy Somer alternators can operate for 20-30+ years. Key maintenance includes regular bearing replacement (every 20,000-30,000 hours), diode inspection, AVR checks, and winding insulation testing. We supply all maintenance parts to keep your alternator running reliably.
Contact Us for Leroy Somer Alternator Parts
For pricing, availability, and technical support on Leroy Somer alternator parts:
- 📱 WhatsApp: +86 15905360672
- 📧 Email: huaquan@huaquanpower.com
- 🌐 Website: huaquanpower.net