Automatic Voltage Regulators,
AVR, voltage regulator

We are a manufacturer and exporter of Automatic Voltage Regulators (AVRs) with over 25 years of experience in the industry. Our manufacturing facility is located in the Okhla Industrial Area, one of the most developed industrial hubs in New Delhi.

The primary purpose of an Automatic Voltage Regulator is to control incoming voltage fluctuations and deliver a stable, regulated output. To ensure long-lasting and reliable performance, we manufacture our AVRs using advanced technology and high-quality components.

Before introducing our range of Automatic Voltage Regulators, it is important to understand some basic facts about power distribution systems. In most countries, electricity is generated and transmitted through a three-wire balanced supply system. The connected load typically includes both single-phase and three-phase equipment, all operating on this balanced system.

To support such loads, a Deltaโ€“Star configuration transformer is used at the final stage of the distribution network. This converts the three-wire system into a three-phase, four-wire system. A critical factor in this setup is that the neutral point on the star side must be properly grounded to prevent neutral floating or oscillation. A stable and well-grounded neutral is essential for maintaining reliable electrical conditions.

If the neutral is not properly managed, it can lead to unbalanced single-phase voltages, a common issue in many distribution networks. Even in such cases, the line-to-line voltages generally remain balanced, which is why three-phase loads experience fewer issues compared to single-phase loads.

Our Automatic Voltage Regulators are designed and supplied in both single-phase and three-phase configurations, ensuring stable performance across a wide range of applications.

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Types of Servo Voltage Stabilizers &
Servo Voltage Regulators

Unbalanced Type AVR

The unbalanced type Automatic Voltage Regulator (AVR) is a widely accepted design suitable for a variety of operating conditions. In this type, each phase is independently sensed and corrected. It is essentially a combination of three single-phase units integrated into one system.

This type is suitable for both balanced and unbalanced loads, as well as balanced and unbalanced incoming voltages. When the load consists of a mix of three-phase and single-phase equipment, or is entirely single-phase in nature, the unbalanced type AVR is strongly recommended. Due to its flexibility and reliability, unbalanced type AVRs are widely used across most industries and applications.

Balanced Type AVR

In a balanced type Automatic Voltage Regulator, one phase (master phase) is sensed, and the remaining two phases are corrected based on the master phase.

This type is suitable only for balanced loads and balanced incoming voltages. When all connected loads are purely three-phase, a balanced type AVR can be used effectively.

How to Decide the Right KVA Rating for an Automatic Voltage Regulator (AVR)

Below are some commonly used thumb-rule conversion factors to help select the correct KVA rating for an Automatic Voltage Regulator:

  • KVA of Stabilizer = HP of lift ร— 3

  • KVA of Stabilizer = Tonnage of AC plant ร— 2

  • KVA of Stabilizer = HP for resistive loads

  • KVA of Stabilizer = (HP or KW) รท Power Factor for reactive loads

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Customer Service & Quality
Our products are all made in India

As part of our engineering and manufacturing services, we help our customers customize scheduling, packaging, shipping, billing, and communication processes to meet their specific inventory management, product handling, and delivery requirements. We are committed to delivering a level of quality and service that enables our customers to become leaders in their respective markets. We take pride in being the only transformer company our customers need. Driven by a spirit of unity, selflessness, and single-minded focus, we provide customer service that truly stands out.

Countries Where
We are Regularly Exporting

Our Happy Customers

We were looking for some high quality and reliable DC to AC inverter for commercial use for our appliances. My verdict is that the products were of excellent quality and support from the Purvolt was professional. Product pricing was also reasonable. Highly recommended. Kudos to the team.

โ€“ Ankita, Faridabad, India

I am one of the oldest clients of Purevolt India and what i like about is communication and product quality as promised over the call. I couldn't thank more to the Sumit for meeting our expectations. The quality of the product was satisfactory, it met our requirements, and it was delivered on time, as promised by the team.

- Ahmed from Saudi Arabia

Our factory required some DC to AV inverter. I must say that the product quality was beyond our expectations. I couldn't thank more to the Purevolt Team for delivering high quality product. Communication with team was also smooth. The team has done an excellent job managing delivering process.

- Dola from Nigeria