Alternator Parts
OEM-grade AVRs, diodes, rotors, bearings and excitation parts — supplied for Delcot, Stamford, Leroy-Somer and other major alternator makes from 10 kVA to 2500 kVA.
100mm Stainless Steel Canopy T Type Door Lock with Key Set Replacement for Generator Spare Parts
3-Point Generator Canopy Door Lock 35 mm with Keys
50mm Stainless Steel Canopy T Type Door Lock | Replacement for Kirloskar Bliss Generator
A035F403 – Multi Functional Monitor Cummins (0302-2098) Controller Cummins Replacement Spare Parts
AS 540 Automatic Voltage Regulator Replacement AVR for Diesel Generators
The AS540 is a sophisticated, 2-phase sensing, self-excited analogue AVR designed specifically for brushless diesel generators. It is the standard regulation component for the STAMFORD® S0 and S1 range, ensuring your alternator maintains a steady output voltage regardless of load changes.
Key Features
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Precision Regulation: Maintains voltage accuracy within $\pm$1.0%, protecting sensitive electronics from fluctuations.
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Enhanced Motor Starting: Supports an optional auxiliary winding to improve motor starting performance and sustain short-circuit currents.
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Under-Frequency Protection: Features a built-in Under-Frequency Roll-Off (UFRO) circuit with an LED indicator to prevent engine overload during speed drops.
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Durable Design: Built with high-quality electronic components and a rugged, vibration-resistant casing for long-term reliability in harsh environments.
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Universal Compatibility: A direct replacement for many Cummins and Stamford parts
AS440 AVR Automatic Voltage Regulator Replacement for Stamford Alternators S4 HC5 UC22 UC27
Key Features
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Direct replacement for AS440 AVR
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2-Phase sensing system for accurate voltage regulation
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Self-excited AVR design
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Built using Surface Mount Technology (SMT)
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Ensures stable generator voltage output
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Helps prevent over/under voltage conditions
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Durable design for diesel generator applications
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Easy installation and wiring compatibility
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Reliable performance for industrial and backup power generators
Key Features
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Direct replacement for AS440 AVR
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2-Phase sensing system for accurate voltage regulation
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Self-excited AVR design
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Built using Surface Mount Technology (SMT)
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Ensures stable generator voltage output
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Helps prevent over/under voltage conditions
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Durable design for diesel generator applications
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Easy installation and wiring compatibility
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Reliable performance for industrial and backup power generators
Key Features
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Direct replacement for AS440 AVR
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2-Phase sensing system for accurate voltage regulation
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Self-excited AVR design
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Built using Surface Mount Technology (SMT)
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Ensures stable generator voltage output
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Helps prevent over/under voltage conditions
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Durable design for diesel generator applications
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Easy installation and wiring compatibility
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Reliable performance for industrial and backup power generators
Key Features
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Direct replacement for AS440 AVR
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2-Phase sensing system for accurate voltage regulation
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Self-excited AVR design
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Built using Surface Mount Technology (SMT)
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Ensures stable generator voltage output
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Helps prevent over/under voltage conditions
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Durable design for diesel generator applications
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Easy installation and wiring compatibility
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Reliable performance for industrial and backup power generators
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AS480 Replacement AVR Generator Voltage Regulator with PMG Excitation
Key Features
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PMG excitation power supply
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Stable voltage regulation (±1%)
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Supports parallel generator operation
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Low frequency protection adjustment
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Voltage frequency tilt adjustment
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DROOP parallel connection capability
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Single-phase voltage detection
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Durable ABS protective housing
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Suitable for 50/60Hz generator systems
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Reliable replacement for AS480 AVR modules
AVR (Automatic Voltage Regulator) – LOREY SOMER D510C (Replacement Part)
Technical Specifications
- Make: LOREY SOMER (Replacement Compatible)
- Part Number: D510C
- Type: AVR (Automatic Voltage Regulator)
- Application: Diesel Generator Control Systems
AVR / Diode / Surge Protection Kit – STAMFORD kVA (Replacement Part)
Kit Contents
- High-performance diodes
- Surge suppressor components
- Heavy-duty connecting leads with terminals
- Mounting accessories (if applicable)
AVR 250V 220μF, for 2KW-3KW 168F Repacement Parts Automatic Voltage Regulator for Generator
AVR DVR 2000E – Automatic Voltage Regulator (Replacement Part for Diesel Generators)
Technical Specifications
- Model: DVR 2000E
- Type: Automatic Voltage Regulator (AVR)
- Application: Diesel Generator Voltage Control
- Function: Maintains constant generator output voltage
- Compatibility: Suitable replacement for DVR 2000E AVR systems
AVR Replacement Part Slipring Alternator 0-380 V DC 10 AMPS Generator Spare Parts
AVR SX460 Automatic Voltage Regulator E000-24602-1P Replacement For Cummins Stamford AVR Diesel Generator Spare Parts
AVR TT09-4 Automatic Voltage Regulator Replacement Parts for Single Phase for 5KW Generator
AVR TT09-4C Three Phase Automatic Voltage Regulator Replacement Parts for 5KW to 6.5KW Generator
AVR-12A 7Amp 1/2 Wave Self Excited Dip-Switch Programmalbe Replacement Part Automatic Voltage Regulator Universal Fit
Leroy Somer R449 Replacement AVR – Digital Upgrade & High-Performance Analog Alternative for AREP/PMG Alternators
Technical Specifications
| Feature | Specification |
| Voltage Sensing | 85V to 520V (50/60 Hz) |
| Output Current | 7A Continuous (15A for 10 seconds during overload) |
| Regulation Accuracy | ±0.5% at steady state |
| Response Time | 500 ms (Normal) to 300 ms (Fast) |
| Compatible Alternators | LSA 50.2, 51.2, 53, 54, and others |
| Operating Temp | -30°C to +65°C |
R250 Replacement AVR Generator Voltage Regulator (Alternator AVR)
Key Features
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Precise Voltage Regulation – Maintains consistent generator output voltage.
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Micro-Controller Numeric Regulation – Improves accuracy and system performance.
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Transistor Controlled Power Circuit – Ensures reliable excitation control.
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Simple Installation & Adjustment – User-friendly setup and configuration.
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High Reliability – Designed for continuous generator operation.
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Standalone Operation Mode – Suitable for independent alternator systems.
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Compact & Durable Design – Built for long service life.
R450T AVR Replacement Automatic Voltage Regulator Compatible with Leroy-Somer R450T for Generator
Key Features
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Compatible replacement for R450T AVR
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Maintains stable generator output voltage
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High reliability electronic components
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Efficient heat sink design for cooling
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Easy installation and terminal connections
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Designed for industrial generator applications
Replacement for Leroy-Somer R150 AVR | Automatic Voltage Regulator for TAL040 TAL042 TAL044 | 6 Amp Excitation
The R150 is engineered for durability and precision control in demanding industrial environments.
| Feature | Specification |
| Compatibility | Leroy-Somer TAL Series (TAL040, TAL042, TAL044, etc.) |
| Excitation Current | Continuous 6A (Maximum) |
| Input Voltage | 180V - 240V AC |
| Regulation Accuracy | $\pm 0.8\%$ at rated speed |
| Operating Temp | -30°C to +70°C |
Replacement for Leroy-Somer R450 Automatic Voltage Regulator (AVR)
Technical Specifications
| Feature | Specification |
| Voltage Regulation | ± 0.5% |
| Nominal Excitation Current | 6A |
| Maximum Excitation Current | 10A (for 10 seconds) |
| Supply Range | 150V (50Hz / 60Hz) |
| Voltage Detection | ≤ 530V |
| Protection | 10A Fast-acting Fuse |
| U/F Modes | U/F (LAM: OFF), Mode 1, and Mode 2 (Auto-adapting) |
Replacement for MX321 Automatic Voltage Regulator (AVR)
The MX321 features several trimmers (potentiometers) to fine-tune the generator's behavior:
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VOLTS: Adjusts the main generator output voltage.
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STABILITY: Prevents "hunting" or voltage fluctuations by adjusting the damping effect.
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UFRO (Under-Frequency Roll Off): Sets the "knee point" where the voltage begins to drop if the engine slows down, protecting the exciter.
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DROOP: Used for parallel operation to ensure the generator shares the reactive load correctly.
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I LIMIT: Sets the maximum stator current limit (if using a Current Transformer).
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OVER V / EXC: Sets the trip levels for over-voltage and over-excitation protection to prevent damage to the generator.
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RAMP: Adjusts the "soft start" time for the voltage to build up upon startup.
