Leroy Somer R250 Automatic Voltage Regulator (AVR) - 100% Original OEM

General Power is proud to offer the genuine Leroy Somer R250 AVR, a premium automatic voltage regulator engineered in France for SHUNT excitation alternators. This authentic OEM voltage regulator delivers precise voltage control, protecting your generator from voltage fluctuations and ensuring stable power output for critical applications. Whether you're replacing a failed AVR or upgrading your alternator's control system, the R250 represents the gold standard in voltage regulation technology. As an authorized dealer of Leroy Somer generator parts, General Power guarantees you receive factory-fresh, genuine components with full manufacturer support.

The Leroy Somer R250 automatic voltage regulator is designed for professional generator applications requiring reliable, long-term performance. This compact AVR module features advanced electronic circuitry that continuously monitors and adjusts alternator output voltage, maintaining consistent power regardless of load changes or speed variations. The R250's robust construction and superior component quality ensure extended service life even in demanding industrial environments, making it the preferred choice for contractors, rental companies, and facility managers worldwide.

Cross-Reference Compatibility - Same Exact AVR As:

• Leroy Somer AEM110RE019 - Direct factory equivalent
• SDMO 330410933 - SDMO branded version of R250
• SDMO R250330410345 - Alternative SDMO part number
• FG Wilson 10000-12943 - FG Wilson generator OEM part
• Olympian 10000-12943 - Olympian generator OEM part
• Perkins 10000-12943 - Used in Perkins powered generators

Technical Specifications

Compatible Alternator and Generator Models

The R250 AVR is specifically engineered for use with SHUNT excitation alternators from multiple manufacturers. This voltage regulator is the OEM-specified component for numerous industrial and commercial generator sets:

• Leroy Somer Alternators - LSA series alternators with SHUNT excitation systems
• SDMO Generators - Industrial and portable generator models using compatible alternators
• FG Wilson Generators - Various kW ratings across commercial and industrial ranges
• Olympian Generator Sets - Industrial standby and prime power applications
• Perkins Powered Units - Generator sets with compatible alternator configurations
• Kohler-SDMO Models - Select models in the SDMO product line
• Industrial Diesel Generators - From 20kW to 500kW+ with SHUNT alternators

Before ordering, verify your existing AVR model number or consult your alternator's technical documentation. The R250 is designed exclusively for SHUNT excitation systems and is not compatible with PMG (Permanent Magnet Generator) or other excitation types. General Power's technical support team is available to help confirm compatibility for your specific application.

Installation Overview

Installing the Leroy Somer R250 AVR is straightforward for qualified technicians familiar with generator maintenance. Always disconnect all power sources and discharge capacitors before beginning any AVR replacement:

Step 1: Safety First - Shut down the generator, disconnect the battery, and lockout/tagout all power sources. Allow the alternator to cool completely before working on electrical components.

Step 2: Remove Old AVR - Photograph existing wire connections for reference. Carefully disconnect all wiring harnesses from the old voltage regulator, labeling each wire if documentation is unavailable. Remove mounting screws or release mounting clips securing the AVR.

Step 3: Inspect Connections - Examine all terminals and wiring for signs of damage, corrosion, or burning. Clean terminals as needed and replace any damaged wiring before installing the new R250 AVR.

Step 4: Mount New R250 - Position the new voltage regulator in the mounting location, ensuring proper ventilation around the unit. Secure using the appropriate mounting method (clips or screws) according to your alternator's design.

Step 5: Connect Wiring - Reconnect all wiring harnesses according to your reference photos or the alternator's wiring diagram. Ensure all connections are tight and secure. Typical connections include sensing inputs, excitation output, and power supply terminals.

Step 6: Testing - Reconnect the battery and perform initial testing. Start the generator and monitor voltage output with a quality multimeter. Check voltage regulation under no-load and loaded conditions. Fine-tune voltage settings if adjustment potentiometers are accessible.

For optimal performance, the R250 should be installed in a location with adequate airflow and protected from moisture, excessive vibration, and extreme temperatures. If you're uncomfortable performing this installation, consult a qualified generator technician. General Power offers technical support to assist with installation questions.

Why Buy Your Leroy Somer R250 AVR from General Power?

Authorized Dealer Status - General Power is an authorized dealer of genuine Leroy Somer generator components. When you purchase from us, you receive authentic OEM parts backed by manufacturer warranties, not aftermarket imitations that may fail prematurely or damage your alternator.

100% Genuine OEM Parts - Every R250 AVR we sell is manufactured by Leroy Somer to exact factory specifications. We source directly from authorized distributors, ensuring you receive the same quality part that came with your generator from the factory. Counterfeit AVRs are a serious problem in the generator industry - protect your investment with genuine components.

Same-Day Shipping - We understand that generator downtime costs money. Orders placed before our cutoff time ship the same business day, getting your replacement AVR to you as quickly as possible. We stock the R250 and other critical generator components for immediate availability.

Expert Technical Support - Our team includes experienced generator technicians who can answer compatibility questions, provide installation guidance, and help troubleshoot voltage regulation issues. We're here to ensure you get the right part and install it correctly.

Competitive Pricing - As a high-volume dealer, General Power offers competitive pricing on genuine OEM parts. You get authentic Leroy Somer quality without the premium pricing often charged by generator manufacturers.

Easy Returns - If you accidentally order the wrong AVR or encounter any issues, our straightforward return process makes it easy to exchange or return unused parts.

Frequently Asked Questions About the Leroy Somer R250 AVR

Q: How do I know if the R250 is compatible with my alternator?

A: The R250 is designed for SHUNT excitation alternators. Check your existing AVR for model number markings - if you have an R250, AEM110RE019, or any of the cross-reference numbers listed above, this is the correct replacement. You can also consult your alternator's data plate or technical manual. If uncertain, contact General Power with your generator model and serial number, and we'll confirm compatibility.

Q: What's the difference between SHUNT and PMG voltage regulators?

A: SHUNT excitation AVRs like the R250 derive their power from the alternator's main output windings, making them simpler and more economical. PMG (Permanent Magnet Generator) AVRs use a separate permanent magnet generator for power, providing superior performance with nonlinear loads and welding applications. The two types are NOT interchangeable - always replace with the same excitation type.

Q: Can I adjust the voltage output on the R250?

A: Yes, the R250 typically includes adjustment potentiometers for voltage setting and stability tuning. However, these should only be adjusted by qualified technicians using proper test equipment. Incorrect adjustment can damage connected equipment or the alternator itself. Most installations require no adjustment beyond factory settings.

Q: What causes AVR failure and how can I prevent it?

A: Common AVR failure causes include moisture ingress, excessive vibration, overheating due to poor ventilation, voltage spikes from lightning or short circuits, and simple component aging. Prevent premature failure by ensuring proper mounting, adequate ventilation, using surge protection, maintaining clean electrical connections, and following recommended service intervals.

Q: Is this AVR covered by warranty?

A: Yes, genuine Leroy Somer R250 AVRs purchased from General Power include the manufacturer's standard warranty covering defects in materials and workmanship. Warranty terms vary by region and application - contact us for specific warranty information. Keep your purchase receipt and installation documentation for warranty claims.

Trust General Power for Genuine Leroy Somer Generator Parts

The Leroy Somer R250 automatic voltage regulator represents decades of French engineering excellence in power generation control systems. Whether you're maintaining a critical standby generator, servicing rental fleet equipment, or repairing an industrial prime power unit, choosing genuine OEM components ensures reliable performance and long service life. General Power's commitment to authentic parts, technical expertise, and rapid shipping makes us your trusted partner for all generator maintenance needs.

Don't risk your generator's performance with questionable aftermarket parts or uncertain suppliers. Order your genuine Leroy Somer R250 AVR from General Power today and experience the difference that authorized dealer service provides. Our knowledgeable staff is standing by to answer questions, confirm compatibility, and process your order for same-day shipping. Keep your generator running at peak performance with authentic OEM components from General Power - your complete source for professional generator parts and support.

Order your Leroy Somer R250 AVR now and get same-day shipping on this genuine OEM voltage regulator. Contact General Power today!