Overview

The AVK COSIMAT C2.2 Automatic Voltage Regulator (AVR) is a precision-engineered voltage control solution specifically designed for synchronous alternators operating in demanding conditions with nonlinear loads. As a compact and reliable AVR, the COSIMAT C2.2 ensures stable voltage output by continuously monitoring and adjusting the excitation current to the alternator's rotor. This advanced regulator features an effective value measuring system (true RMS) that sets it apart from the standard C2.1 model, making it particularly suitable for applications where generators supply power to nonlinear loads such as variable frequency drives, uninterruptible power supplies (UPS), rectifiers, and modern electronic equipment. The COSIMAT C2.2 delivers consistent voltage regulation even when powering sensitive equipment that can create harmonic distortion and waveform irregularities, ensuring your generator system maintains optimal performance across diverse operating conditions.

Engineered by AVK, a globally recognized leader in alternator and generator technology, the COSIMAT C2.2 AVR incorporates sophisticated voltage regulation algorithms that account for alternator frequency variations through its integrated U/F function and under-speed protection features. These capabilities allow the regulator to automatically adjust voltage output proportionally to frequency changes, protecting both the alternator and connected loads during startup, load changes, and varying operating conditions. The true RMS measuring system provides superior accuracy compared to standard average-sensing regulators, ensuring precise voltage control regardless of waveform distortion caused by nonlinear loads. Whether you're operating standby power systems, prime power applications, or specialized industrial generator sets, the COSIMAT C2.2 delivers the reliability and precision required to maintain consistent electrical output and protect valuable equipment from voltage fluctuations, under-voltage conditions, and over-excitation scenarios.

Key Specifications

Compatible Alternator Models

The AVK COSIMAT C2.2 AVR is specifically designed for use with AVK synchronous alternators and is compatible with a wide range of AVK alternator series commonly found in industrial, commercial, and standby power generation applications. This voltage regulator is engineered to work seamlessly with AVK alternators in the DSG, DIG, DIH, DSL series, and other brushless synchronous alternator models that require precise voltage regulation with true RMS sensing capabilities. The COSIMAT C2.2 is particularly recommended for generator sets powering data centers, hospitals, telecommunications facilities, manufacturing plants, and other critical applications where nonlinear loads are prevalent. Compatible alternator power ratings typically range from 10 kVA to several hundred kVA, depending on the specific alternator configuration and excitation system design. This AVR supports both single-bearing and two-bearing alternator designs and works with various excitation configurations including shunt, separately excited, and PMG (permanent magnet generator) systems when properly configured. When replacing an existing AVR or specifying a voltage regulator for a new alternator installation, always verify compatibility with your specific AVK alternator model number and review the technical documentation to ensure proper electrical connections and configuration settings. The COSIMAT C2.2's true RMS measurement capability makes it the preferred choice for modern generator applications where electronic loads, LED lighting, inverter-driven motors, and other nonlinear equipment create harmonic distortion that can affect voltage regulation accuracy with standard average-sensing AVRs.

Why Buy from General Power

When you purchase the AVK COSIMAT C2.2 AVR from General Power, you're partnering with an authorized dealer committed to providing genuine OEM parts, expert technical support, and exceptional customer service. As a trusted distributor of AVK products and generator components, General Power maintains extensive inventory of automatic voltage regulators, ensuring same-day shipping on most orders placed before our cutoff time. Every COSIMAT C2.2 AVR we sell is 100% genuine OEM equipment sourced directly from authorized AVK distribution channels, guaranteeing authenticity, full manufacturer warranty coverage, and compliance with all original specifications. Our bilingual technical support team (English and Spanish) is available to assist with product selection, compatibility verification, installation guidance, and troubleshooting support—simply call us at 1-888-769-3758 to speak with a knowledgeable generator parts specialist. We understand that downtime is costly, which is why we prioritize rapid order processing and work with reliable shipping carriers to get your voltage regulator delivered quickly. Whether you're a service technician, facility manager, dealer, or end-user, General Power offers competitive pricing, volume discounts for multiple units, and the peace of mind that comes from working with a reputable supplier who stands behind every product we sell. Don't risk equipment damage or extended downtime with counterfeit or incompatible voltage regulators—trust General Power for genuine AVK COSIMAT C2.2 AVRs backed by factory warranty and our commitment to customer satisfaction.

Installation Overview

Installing the AVK COSIMAT C2.2 Automatic Voltage Regulator requires careful attention to electrical connections and proper configuration to ensure optimal performance and safety. While complete installation should be performed by qualified electrical technicians familiar with generator systems, the general process involves these key steps:

• Step 1: Safety Preparation and Removal – Before beginning installation, completely shut down the generator set and disconnect all power sources including battery connections. Lock out and tag out the system according to safety protocols. If replacing an existing AVR, carefully document or photograph all wire connections before disconnecting the old regulator. Remove the failed or outdated voltage regulator from its mounting location, taking note of the mounting hardware and orientation.
• Step 2: Physical Mounting and Connections – Mount the COSIMAT C2.2 in the designated location using appropriate mounting hardware, ensuring adequate ventilation and protection from moisture, excessive heat, and vibration. The regulator should be positioned to allow easy access to adjustment potentiometers and connection terminals. Following the wiring diagram provided with your specific alternator model, connect the sensing input wires (voltage sensing), excitation output wires (to the alternator's rotor field), and any auxiliary connections such as under-frequency protection or remote voltage adjustment circuits. Ensure all connections are tight and secure, with properly sized wire gauges according to the technical specifications.
• Step 3: Configuration and Adjustment – Once all electrical connections are verified, configure the COSIMAT C2.2 settings according to your alternator specifications and application requirements. This includes setting the voltage regulation level using the voltage adjustment potentiometer, configuring the stability setting for your specific alternator characteristics, and adjusting the U/F function and under-speed protection thresholds if applicable. For alternators with specific excitation requirements, ensure that any internal jumpers or DIP switches are set according to the installation manual.
• Step 4: Testing and Commissioning – After installation and configuration, restore power connections and start the generator under no-load conditions. Monitor the output voltage and verify that it stabilizes within the specified range (typically 400-480V for three-phase systems, or as required for your application). Gradually apply load to the generator while observing voltage stability, regulation accuracy, and response to load changes. Fine-tune the voltage and stability adjustments as needed to achieve optimal performance. Test all protection features including under-speed protection and verify that voltage regulation remains stable under both linear and nonlinear load conditions.

Frequently Asked Questions

Q: What does the AVK COSIMAT C2.2 AVR do, and why is it important for my generator?
A: The COSIMAT C2.2 is an automatic voltage regulator that continuously monitors your generator's output voltage and automatically adjusts the excitation current to the alternator's rotor to maintain stable, consistent voltage output. It's essential for protecting sensitive electrical equipment from voltage fluctuations, preventing damage to connected loads, and ensuring your generator delivers reliable power within acceptable voltage tolerances. The C2.2's true RMS measurement system makes it particularly effective when powering modern electronic equipment and nonlinear loads that can create harmonic distortion, providing more accurate voltage regulation than standard average-sensing AVRs.

Q: How do I know if my AVR is failing and needs to be replaced with a new COSIMAT C2.2?
A: Common signs of AVR failure include unstable or fluctuating generator voltage output, inability to maintain voltage under load, over-voltage or under-voltage conditions, erratic voltage readings on monitoring instruments, failure to build voltage during startup, or complete loss of generator output voltage. You may also notice flickering lights, equipment shutdowns, or tripping of voltage-sensitive protective devices. If you've ruled out other causes such as faulty wiring, defective alternator components, or load issues, and symptoms point to voltage regulation problems, replacing the AVR with a new COSIMAT C2.2 is typically the most effective solution. Always test with proper instrumentation and consult with a qualified technician if you're uncertain about the diagnosis.

Q: Is this an OEM part, or is it an aftermarket replacement?
A: The AVK COSIMAT C2.2 AVR sold by General Power is 100% genuine OEM (Original Equipment Manufacturer) equipment produced by AVK. This is not an aftermarket substitute or third-party equivalent—it is the authentic factory part designed specifically for AVK alternators. Purchasing genuine OEM parts ensures proper fit, optimal performance, full compatibility with your alternator's specifications, and coverage under the manufacturer's warranty. While aftermarket AVRs may be available at lower prices, they often lack the precision, reliability, and true RMS measurement capability of the genuine COSIMAT C2.2, and may void your alternator warranty or cause compatibility issues.

Q: What warranty coverage comes with the COSIMAT C2.2, and what does it cover?
A: The AVK COSIMAT C2.2 AVR comes with the standard manufacturer warranty provided by AVK for new, genuine OEM components. Warranty coverage typically includes protection against defects in materials and workmanship under normal use and proper installation conditions. The specific warranty duration and terms are provided with the product documentation and may vary by region and application. Warranty coverage generally requires that the AVR was installed correctly according to manufacturer specifications, operated within rated parameters, and not subjected to damage from external causes such as improper wiring, lightning strikes, over-voltage conditions, or environmental factors beyond normal operating conditions. For specific warranty terms and to initiate a warranty claim if needed, contact General Power at 1-888-769-3758, and our team will assist you with the process.

Q: Can I get technical support for installation and troubleshooting of the COSIMAT C2.2?
A: Yes! General Power provides comprehensive technical support for all products we sell, including the AVK COSIMAT C2.2 AVR. Our bilingual technical team (English and Spanish) can assist with compatibility verification, installation guidance, wiring questions, configuration settings, and troubleshooting support. Whether you need help identifying the correct connections for your specific alternator model, adjusting voltage regulation settings, or diagnosing performance issues, our knowledgeable specialists are available to help. Call us at 1-888-769-3758 during business hours to speak directly with a technical support representative. For complex installations or commissioning of new generator systems, we recommend working with a qualified generator service technician who has experience with AVK alternators and voltage regulation systems.

Order Today

Don't let a failed or underperforming voltage regulator compromise your generator's reliability or put your valuable equipment at risk. The AVK COSIMAT C2.2 Automatic Voltage Regulator delivers the precision, stability, and true RMS measurement capability required for modern generator applications with nonlinear loads. When you order from General Power, you receive genuine OEM quality, competitive pricing, fast shipping, and the expert support you need to keep your power generation system running at peak performance. Our extensive inventory and same-day shipping capability mean you can get your generator back online quickly, minimizing costly downtime and ensuring continuous power availability for your critical applications. Whether you're replacing a failed AVR, upgrading from an older model, or stocking spare parts for preventive maintenance, General Power is your trusted source for authentic AVK components. Call our technical team at 1-888-769-3758 today to verify compatibility with your alternator model, place your order, or get answers to any questions about the COSIMAT C2.2 AVR. Order now and experience the General Power difference—authorized OEM parts, expert support, and the reliability your business demands.