Servo Stabilizer Manufacturer,
Servo Controlled Voltage Stabilizer, Centralized Voltage Stabilizer

We are constantly faced with the problem of electrical voltage fluctuations in the incoming power supply, which can cause serious damage to electrical and electronic equipment. For optimal performance, long equipment life, and full utilization of production systems, the incoming supply voltage must remain stable and within a defined range.

Purevolt Products Pvt. Ltd. is a reliable and leading manufacturer and exporter of servo voltage stabilizers and a trusted supplier of centralized voltage stabilizers for a wide range of applications. Our servo-controlled voltage stabilizers are available in two construction designs:

  • Balanced Type Servo Stabilizers – suitable for three-phase load applications

  • Unbalanced Type Centralized Voltage Stabilizers – ideal for single-phase or mixed single- and three-phase load applications

These servo-type voltage stabilizers are manufactured using high-quality components and are offered at competitive prices, reflecting our strong commitment to safety, reliability, and compliance with quality standards.

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Why should you install Servo Voltage Stabilizer
for your Plant and Machinery?

Input voltage variation is a common issue in many developing regions such as India, Africa, the Middle East, and other Asian countries. Power transmission systems step down high-tension (HT) voltages from 11 kV or 33 kV to low-tension (LT) voltages of 415 V AC. However, due to various unavoidable factors, even HT transmission voltages fluctuate, which directly affects the LT supply and causes unstable voltage at the consumer end.

Impact on Residential, Commercial, and Industrial Equipment

Most residential, commercial, and industrial equipment is designed to operate efficiently at around 400–415 V AC. When the incoming voltage rises above or drops below this range, it leads to unstable output voltage. These fluctuations cause frequent equipment failures, machine breakdowns, and unexpected plant shutdowns, severely impacting productivity.

Losses Caused by Voltage Fluctuations

High or low voltage conditions result in losses that go far beyond financial damage. They lead to production downtime, increased risk of electrical hazards such as short circuits, higher repair and maintenance costs, reduced equipment lifespan, and deterioration in overall plant efficiency. Voltage fluctuations also negatively affect the power factor, ultimately increasing electricity bills.

Why Servo Voltage Stabilizers Are Essential

To prevent these issues, it is strongly recommended to install a servo voltage stabilizer from a reputed manufacturer like Purevolt. Servo stabilizers act as a long-term protective solution, safeguarding expensive machinery and ensuring uninterrupted operations. They are available in various kVA and kW ratings, allowing users to select the most suitable model based on their application requirements.

Purevolt Servo Voltage Stabilizers

Purevolt has been manufacturing servo voltage stabilizers since 1994. Our stabilizers are built using the latest microcontroller-based technologies, are easy to service, and require minimal maintenance. Designed to handle severe voltage fluctuations, they deliver a constant and stable output voltage with ±1% regulation, ensuring that your machinery always receives reliable power.

Choosing the Right Servo Stabilizer

Now that the importance of servo stabilizers is clear, the next crucial step is selecting the right servo stabilizer for your specific needs. To simplify this process, Purevolt provides easy-to-follow guidelines to help you choose the most suitable servo stabilizer for your application.

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How does this
Servo Voltage Stabilizer Operates and Functions ?

Servo controlled voltage stabilizers utilize a solid-state electronic control circuit, designed using a glass epoxy PCB, to monitor and control the servo motor operation as per system requirements. An AC synchronous servo motor is electrically connected and mechanically coupled to the arm of a dimmerstat (variable auto transformer), which feeds the primary winding of a series-controlled buck–boost transformer.

Any variation in the input voltage generates an error signal that is sent to the PCB control card. This signal is suitably amplified and used for corrective action—either increasing or decreasing the output voltage as required. The output voltage of the servo stabilizer is continuously compared with a reference voltage, and the resulting error signal precisely controls the AC synchronous servo motor. This ensures true proportional voltage control, unlike conventional on/off type control circuits.

Types of Servo Voltage Stabilizer Constructions

Servo type voltage stabilizers are available in two standard construction topologies, depending on the installation site and environmental conditions:

Air-Cooled Servo Voltage Stabilizers

In air-cooled models, exhaust fans and louvers are used to provide effective natural and forced air cooling to the internal assembly. These models are suitable for moderate ambient temperature conditions.

Oil-Cooled Servo Voltage Stabilizers

In oil-cooled models, the entire internal assembly is housed inside a metal sheet tank filled with fresh mineral insulating oil, commonly known as transformer oil. This oil efficiently dissipates heat generated by the internal transformer during load operation, making oil-cooled stabilizers ideal for high-load and high-temperature environments.

Oil-cooled servo stabilizers are especially recommended for regions with extreme climatic conditions such as Africa, the Middle East, and other hot regions worldwide, including countries like Nigeria, Kenya, Tanzania, Iraq, UAE, Saudi Arabia, Oman, South Africa, Australia, and Mauritius.

Air-Cooled vs Oil-Cooled Stabilizers

Both air-cooled and oil-cooled servo voltage stabilizers offer distinct advantages and benefits. The choice depends on application requirements, ambient conditions, and load characteristics. Due to differences in construction and cooling mechanisms, there is also a cost variation between these two types of voltage stabilizers.

Fields of Applications for these
servo voltage stabilizers & servo voltage regulators :

Servo-based voltage stabilizers and regulators are essential wherever a controlled and constant voltage supply is critical for safe and efficient operation. These systems are widely used across a broad range of applications, including hospitals, laboratories, life-saving and testing equipment, pharmaceutical units, research institutes, defense facilities, telecommunications, air conditioning systems, data processing centers, electronics-based industries, and educational institutions.

They are also extensively used in food processing units, paper plants, footwear and leather industries, cement plants, textile industries, molding units, hotels, farmhouses, offices, and residential or housing apartments.

Countries Where
We are Regularly Exporting