--- title: "Automatic Voltage Stabilizer (AVR) | Entogo" description: "Entogo supplies industrial automatic voltage stabilizers for loads exposed to supply variation." url: https://entogo.ca/products/automatic-voltage-stabilizer/ lang: en type: website image: https://entogo.ca/_astro/automatic-voltage-stabilizer.Y3f17WR8.webp alternates: en: https://entogo.ca/products/automatic-voltage-stabilizer/ fr-CA: https://entogo.ca/fr/products/automatic-voltage-stabilizer/ fr: https://entogo.ca/fr/products/automatic-voltage-stabilizer/ es: https://entogo.ca/es/products/automatic-voltage-stabilizer/ ar: https://entogo.ca/ar/products/automatic-voltage-stabilizer/ pl: https://entogo.ca/pl/products/automatic-voltage-stabilizer/ ro: https://entogo.ca/ro/products/automatic-voltage-stabilizer/ ru-KZ: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-UZ: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-KG: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-TJ: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-TM: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-AZ: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-AM: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ ru-GE: https://entogo.ca/ru/products/automatic-voltage-stabilizer/ site: https://entogo.ca/ llms: https://entogo.ca/llms.txt --- Products › Voltage Regulation & Power Quality › Automatic Voltage Stabilizer (AVR) Voltage Regulation & Power Quality # Automatic Voltage Stabilizer (AVR) ![Automatic Voltage Stabilizer (AVR)](https://entogo.ca/_astro/automatic-voltage-stabilizer.Y3f17WR8_1cqfMM.webp) Representative configuration. The offered model, dimensions and interfaces are confirmed with the technical proposal. Overview Entogo supplies industrial automatic voltage stabilizers for loads exposed to supply variation. Specify the full input-voltage range, output tolerance, load current, starting duty and bypass arrangement before selecting the kVA. Entogo supplies this project equipment through manufacturing partners. Entogo Inc. in Toronto coordinates technical selection, supply scope and order support. | Specification | Value | | --- | --- | | Function | Automatic regulation of the supply voltage to connected loads | | Phase arrangement | Single- or three-phase configuration selected for the installation | | Frequency | 50 / 60 Hz design options | | Input envelope | Minimum/maximum sustained voltage and duration of excursions | | Output requirement | Target voltage, tolerance and permissible recovery time | | Load rating | Continuous kVA plus motor starting, overload and phase imbalance | | Bypass and protection | Maintenance bypass, over/undervoltage trip and interlocks to agree | | Installation | Neutral arrangement, ventilation, enclosure and ambient conditions | Reference configurations and selection criteria are shown together. The technical offer defines the matched ratings, tests and guaranteed performance for the ordered unit. ## Describe the disturbance before choosing the stabilizer A voltage log is more useful than a single low-voltage reading. Record sustained variation, short dips, unbalance and the load operating when each event occurs. These conditions determine whether stabilization is the appropriate remedy. The stabilizer does not provide stored energy during an outage. Where a process must ride through loss of supply, assess UPS or storage separately and coordinate their interfaces. ## Applications - Industrial equipment - Commercial loads - Sites with variable supply voltage ## Selection & project requirements - **Can an AVR replace a UPS during a power failure?**: No. A voltage stabilizer regulates an available supply; it does not inherently store energy to maintain output during an outage. A ride-through requirement needs an appropriately designed UPS or energy-storage solution. - **Why does the minimum input voltage matter for sizing?**: Supplying the same output power at lower input voltage requires more input current. The acceptable kVA across the operating envelope must therefore be confirmed, rather than assuming the nominal-voltage rating applies under every supply condition. - **What is the difference between accuracy and response?**: Output tolerance states the acceptable voltage deviation. Response or correction time describes how the equipment reacts to a change. Specify both against the load sensitivity; a tight steady-state tolerance does not by itself guarantee fast dip correction. - **What should be checked on a three-phase installation?**: Identify line-to-line and line-to-neutral loads, neutral requirements, phase imbalance and motor starting. Agree phase control, protection and bypass operation so the selected unit fits the actual plant distribution system. For Canadian and US projects, include the utility specification, service frequency and required approvals. State whether the order is for the transformer alone or an integrated equipment package. ## Discuss your equipment requirements Send your single-line diagram, load or process data, target market and required schedule. We will identify the configuration and documents needed for a technical quotation. ## Design references [![Power transformer at an electrical substation with an on-load tap changer for voltage regulation](https://entogo.ca/_astro/transformer-voltage-regulation-tap-changers.LSKEj7V-_xljGw.webp) Power & Distribution ### De-energized taps or a load tap changer? Specifying transformer voltage regulation Transformer regulation is %R cos θ + %X sin θ plus a small quadratic term. A 1500 kVA, 5.75 %Z unit at 0.85 PF drops 3.85 %, so a 13.3 to 14.0 kV primary needs the 13 455 V tap to hold 456 to 504 V. The full ANSI C84.1 Range A primary swing needs an OLTC or a step regulator. View](https://entogo.ca/insights/transformer-voltage-regulation-tap-changers/) ## Related equipment [![Entogo automatic power-factor-correction capacitor bank](https://entogo.ca/_astro/Entogo-Low-Voltage-Reactive-Power-Compensation-Cabinet.2RVOaNzv_ZsiHQU.webp) Products ### Automatic Power-Factor-Correction Capacitor Bank An automatic power-factor-correction (PFC) capacitor bank for 480 V, 60 Hz systems — stepped, controller-switched kVAR with detuned harmonic-filter reactors to raise power factor, cut demand charges and free up transformer capacity. Designed to UL 810, IEEE 18 and NEMA CP-1; UL/CSA certifiable. View](https://entogo.ca/products/power-factor-correction-capacitor-bank/)[![Dead Tank Circuit Breaker](https://entogo.ca/_astro/dead-tank-circuit-breaker.BA5Nfi_h_mU0IX.webp) Products ### Dead Tank Circuit Breaker Entogo supplies outdoor dead-tank circuit breakers for substation switching and protection. A 72.5 kV SF6 configuration is a reference enquiry point; continuous current, breaking duty, insulation and site conditions are specified together. View](https://entogo.ca/products/dead-tank-circuit-breaker/)[![Step Voltage Regulator (SVR)](https://entogo.ca/_astro/step-voltage-regulator.Ci6fH5B-_6gguI.webp) Products ### Step Voltage Regulator (SVR) Entogo supplies step voltage regulators for feeder voltage control. Reference configurations span 2.5–19.92 kV; select line current, insulation, connection and controller together rather than treating regulator kVA as total feeder capacity. View](https://entogo.ca/products/step-voltage-regulator/)[![Entogo metal-clad medium-voltage switchgear with drawout vacuum circuit breakers](https://entogo.ca/_astro/Entogo-Armored-Removable-AC-Metal-Enclosed-Switchgear.DuhYnxGM_1rPQtT.webp) Products ### Metal-Clad Switchgear (Drawout MV) Metal-clad medium-voltage switchgear with drawout vacuum circuit breakers for 5/15/27/38 kV class systems, 60 Hz — compartmentalized, insulated-bus construction up to 4000 A and 50 kA, with optional arc-resistant rating. Designed to ANSI/IEEE C37.20.2; UL/CSA certifiable. 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