Overview

The Leroy Somer D700 AVR (Automatic Voltage Regulator) represents a premium solution for maintaining consistent electrical output in generator systems. Manufactured in France by Leroy Somer, a division of Emerson Electric, this genuine OEM voltage regulator is engineered to deliver precise voltage control for industrial, commercial, and standby power applications. The D700 AVR continuously monitors generator output voltage and automatically adjusts the excitation current to the alternator's rotor, ensuring stable voltage delivery regardless of load fluctuations or engine speed variations. This critical component protects sensitive electrical equipment from damaging voltage spikes, brownouts, and power irregularities that can lead to equipment failure, data loss, and costly downtime.

Designed with robust electronics and field-proven circuitry, the Leroy Somer D700 voltage regulator provides reliable performance in demanding environments where power quality cannot be compromised. Whether you're maintaining backup power systems for hospitals, data centers, manufacturing facilities, or telecommunications infrastructure, the D700 AVR ensures your generator delivers clean, regulated power when it matters most. This authentic Leroy Somer component features advanced sensing technology, overcurrent protection, and superior build quality that sets it apart from aftermarket alternatives. When you invest in a genuine D700 AVR, you're choosing the same component trusted by OEM generator manufacturers worldwide, backed by Leroy Somer's decades of engineering excellence in rotating electrical machinery.

Key Specifications

Compatible Alternator Models

The Leroy Somer D700 automatic voltage regulator is specifically designed for use with a wide range of Leroy Somer brushless alternators and generator sets. This AVR is commonly found in Leroy Somer LSA series alternators, including LSA 40, LSA 42.2, LSA 43.2, LSA 44.2, LSA 46.2, LSA 47.2, and LSA 49.2 models, depending on specific generator configurations and power ratings. The D700 regulator is engineered to work seamlessly with both single-bearing and double-bearing alternator designs across various power outputs ranging from small standby generators to larger industrial generator sets. It is compatible with three-phase synchronous alternators operating at standard frequencies of 50 Hz and 60 Hz, making it suitable for global applications. Generator manufacturers who integrate Leroy Somer alternators into their gensets—including brands such as FG Wilson, SDMO, Broadcrown, AKSA, and many others—frequently specify the D700 AVR as original equipment. When replacing your voltage regulator, it's essential to verify compatibility with your specific alternator model and configuration. Check your generator's technical documentation or the existing AVR label to confirm the D700 is the correct replacement for your application. If you have questions about compatibility with your particular Leroy Somer alternator or generator set, our technical support team is available to assist you in identifying the right voltage regulator for your equipment.

Why Buy from General Power

When you purchase your Leroy Somer D700 AVR from General Power, you're partnering with an authorized dealer committed to providing genuine OEM parts and exceptional customer service. We stock only authentic, factory-new Leroy Somer voltage regulators manufactured in France—never aftermarket copies or refurbished units that compromise reliability and performance. Every D700 AVR we ship comes factory-sealed with full manufacturer backing, ensuring you receive the exact component specified by Leroy Somer engineers. Our extensive inventory allows us to offer same-day shipping worldwide, minimizing your generator downtime and getting your critical power systems back online fast. Whether you're located in North America, South America, Europe, Asia, or anywhere else in the world, we can expedite your AVR shipment to meet urgent repair schedules.

At General Power, we understand that technical support is just as important as fast parts delivery. Our bilingual technical support team (English and Spanish) is available to answer installation questions, troubleshoot voltage regulation issues, and help you verify compatibility with your specific alternator model. We're generator parts specialists with deep knowledge of Leroy Somer products and AVR technology. Quantity discounts are available for contractors, fleet managers, and maintenance facilities purchasing multiple units—contact us for volume pricing. Need immediate assistance? Call us toll-free at 1-888-769-3758 to speak with a knowledgeable parts specialist who can confirm stock availability, provide technical guidance, and process your order quickly. When generator reliability matters, trust General Power for authentic Leroy Somer parts, expert support, and the fast shipping that keeps your operations running.

Installation Overview

Installing a Leroy Somer D700 AVR requires basic electrical knowledge and adherence to proper safety procedures. Before beginning any work, ensure the generator is completely shut down, cooled, and disconnected from all power sources including battery connections. Here's a general overview of the installation process:

• Step 1 - Access and Remove Old AVR: Locate the existing voltage regulator, which is typically mounted inside the generator's control panel or on the alternator terminal box. Carefully photograph or document all wire connections before disconnecting them. Remove the mounting screws and extract the failed AVR, taking note of its orientation and position.
• Step 2 - Prepare New D700 AVR: Unpack your new Leroy Somer D700 voltage regulator and inspect it for any shipping damage. Compare the terminal layout with your original unit to confirm compatibility. Review the wiring diagram specific to your alternator model, which should be available in your generator's technical manual or from the manufacturer.
• Step 3 - Connect Wiring: Carefully connect all wires to the corresponding terminals on the new D700 AVR, following the documented configuration from the original unit or the wiring diagram. Typical connections include sensing inputs (voltage measurement), excitation outputs (to the alternator rotor), and any auxiliary connections for droop compensation or remote voltage adjustment. Ensure all connections are tight and properly seated to prevent arcing or voltage regulation issues.
• Step 4 - Mount, Test, and Adjust: Securely mount the D700 AVR in the same position as the original regulator, ensuring adequate ventilation and protection from moisture or contaminants. Reconnect the battery and perform a no-load start test, monitoring output voltage with a multimeter. The generator should build voltage properly and stabilize at the rated output (typically 208-480V depending on configuration). Make fine adjustments using the voltage adjustment potentiometer on the AVR if necessary to achieve the desired output voltage. Test under load conditions if possible to verify stable regulation across varying loads.

Important Note: This is a general installation overview. Always consult your specific generator's service manual and follow all manufacturer guidelines and local electrical codes. If you're not qualified to work on generator electrical systems, contact a certified technician. Improper installation can result in equipment damage, poor voltage regulation, or safety hazards.

Frequently Asked Questions

Q: What does the Leroy Somer D700 AVR do?
A: The D700 Automatic Voltage Regulator continuously monitors your generator's output voltage and automatically adjusts the excitation current supplied to the alternator's rotating field. This feedback control system maintains stable voltage output (typically within ±1% of setpoint) regardless of load changes, engine speed variations, or power factor fluctuations. Without a functioning AVR, your generator would produce unstable voltage that could damage connected equipment or fail to power loads properly.

Q: How do I know if my AVR is failing?
A: Common symptoms of a failing voltage regulator include: fluctuating voltage output under load, inability to maintain stable voltage, no voltage build-up when starting the generator, overvoltage conditions that trip protective devices, undervoltage that prevents equipment from operating, or erratic voltage behavior. You may also notice unusual surging, poor load acceptance, or visual signs of component damage such as burnt areas on the AVR circuit board. If you're experiencing any of these symptoms, testing and potentially replacing the AVR is recommended.

Q: Is this an OEM Leroy Somer part or an aftermarket replacement?
A: This is a 100% genuine OEM Leroy Somer D700 voltage regulator, manufactured by Leroy Somer in France. It is not an aftermarket copy, compatible replacement, or refurbished unit. You're receiving the exact same component that comes as original equipment on new Leroy Somer alternators, with full factory quality control and specifications. We guarantee authenticity on all Leroy Somer parts we sell.

Q: What warranty coverage is included with the D700 AVR?
A: As an authorized dealer of genuine Leroy Somer parts, we provide warranty coverage in accordance with Leroy Somer's standard warranty terms for replacement components. Warranty specifics may vary based on your location and application. Contact our sales team at 1-888-769-3758 for detailed warranty information applicable to your purchase. We stand behind every product we sell with responsive support if any issues arise.

Q: Can I get technical support for installation and troubleshooting?
A: Absolutely! General Power provides complimentary technical support for all products we sell. Our experienced, bilingual support team (English/Spanish) can help you verify compatibility, answer installation questions, assist with voltage adjustment procedures, and troubleshoot regulation issues. Call us at 1-888-769-3758 during business hours, or email us with your technical questions. We're here to ensure your generator repair or maintenance project is successful.

Order Today

Don't let a failed voltage regulator keep your critical generator offline. The Leroy Somer D700 AVR is in stock now at General Power and ready to ship the same day you order. With worldwide shipping capabilities, genuine OEM quality, competitive pricing, and expert technical support, we make it easy to get the exact part you need when you need it most. Whether you're a facility maintenance manager replacing a failed regulator, a generator technician stocking essential repair parts, or a fleet operator maintaining multiple generator sets, we have the inventory and expertise to support your operation. Quantity discounts available—contact us for pricing on multiple units. Order online now or call our parts specialists at 1-888-769-3758 for immediate assistance. Trust General Power for authentic Leroy Somer generator parts, delivered fast, backed by the knowledgeable support that keeps your power systems running reliably.