Name: GY-AVC Unified Power Quality Control Device - GEYA Electrical Equipment Supply
SKU: GY-AVC

Description

GY-AVC Unified Power Quality Control Device Overview

System Diagram

The GY-AVC is a Unified Power Quality Control Device (AVC) consisting of an AC-DC-AC converter, a circuit breaker QF, a contactor KM and a compensation transformer, available in 220V single-phase and 380V three-phase versions with rated capacity from 30kVA to 400kVA. This automatic voltage regulation device samples the grid voltage in real time and, once a deviation from the set value is detected, controls the AC-DC-AC converter to output a voltage with the same or opposite polarity as the grid voltage, adjusting the compensation transformer connected in series in the main circuit to keep the load-side voltage stable.

Working Principle

The AC-DC-AC converter employs fully-controlled power electronic devices, enabling bidirectional power flow. The bypass switch switches to the bypass state during maintenance, and the contactor KM disconnects or connects the load under the compensation state. The device monitors whether the grid voltage deviates from the set value in real time and adjusts the magnitude and polarity of the voltage across the series compensation transformer to ensure stability of the load-side voltage.

Key Features

Real-Time Control — controls AC-DC-AC converter output voltage to keep the load terminal voltage stable.
Stepless Regulation — high regulation accuracy with an uninterrupted regulation process.
Phase-Separate Output — compensation amplitude and speed controllable, adapting to severely unbalanced loads.
High Efficiency — efficiency ≥95% with harmonic distortion controlled within ≤3%.
Modular Converter — easy to maintain with good scalability.
Fault Records — fault alarm and memory functions, storing fault records for up to 30 fault days.
7-inch Touch Screen — parameter settings, power information display, fault records and historical curves.

Protection

Integrated protection covers input overvoltage/undervoltage protection, output overvoltage/undervoltage protection, input overcurrent protection, transformer overtemperature protection and output overload protection, improving the reliability of power supply.

Installation

Cabinet-type (integrated) installation with three-phase four-wire (4L) wiring for three-phase models. Cooling by forced air, protection rating IP20, and noise level ≤65dB.

Applications

Suitable for industrial and commercial power systems requiring stable load-side voltage, particularly sites subject to voltage fluctuation or severe three-phase load unbalance.

Technical Parameters

Parameter	220V (Single Phase)	380V+N (Three-Phase)
Input Voltage	220V (Single Phase)	380V+N (Three-Phase)
Input Range	±20% (rated voltage)
Input Frequency	50Hz/60Hz ±1.5Hz
Current Harmonic Distortion Rate	Increment ≤3%
Voltage Harmonic Distortion Rate	Increment ≤3%
Output Voltage	220V±1%
Output Voltage Setting Range	±20% of input voltage
Voltage Regulation Method	Stepless and contactless
Adjustment Method	Single-phase regulation
Harmonic Distortion	≤3%
Efficiency	≥95%
Power Factor	0.5 lag to 0.7 lead*
7-inch Touch Screen	Parameter settings, power information display, fault records, historical curves, etc.
Protection Function	Input overvoltage/undervoltage, output overvoltage/undervoltage, input overcurrent, transformer overtemperature, output overload protection, etc.
Relative Humidity	≤90%, monthly minimum temperature 25°C, no condensation on the surface
Altitude	Below 2000m
Pollution Level	Below Level III
Noise	≤65dB
Operating Temperature	-10°C~+50°C
Storage Temperature	-30°C~+70°C
Cooling Method	Forced air cooling
Protection Level	IP20

1. What is the GY-AVC?

The GY-AVC is a Unified Power Quality Control Device (automatic voltage regulation device) consisting of an AC-DC-AC converter, a circuit breaker QF, a contactor KM and a series compensation transformer. It keeps the load-side voltage stable by real-time correction of grid voltage deviation.

2. What are its core functions?

Voltage Stabilization — regulated output at 220V±1%.
Stepless Regulation — contactless, uninterrupted regulation within ±20%.
Unbalance Handling — phase-separate control for severely unbalanced loads.
Low Distortion — harmonic distortion ≤3%, efficiency ≥95%.

3. Which key parameters affect selection?

Voltage Level — 220V single-phase or 380V+N three-phase.
Rated Capacity — from 30kVA up to 400kVA.
Input Range — ±20% of rated voltage.
Wiring Method — three-phase four-wire (4L) for three-phase models.

4. Which specifications / models are available?

Model coding example: GY-AVC-0.4-30k/4L-C (0.4 = 380V, 0.22 = 220V). Rated power options: 30, 45, 60, 90, 120, 150, 200, 300 and 400 kVA; wiring 4L (three-phase four-wire); installation type C (cabinet/integrated).

5. What standards and target markets does it suit?

Operating environment: altitude below 2000m, pollution level below Level III, humidity ≤90%, protection rating IP20. It targets industrial and commercial power systems requiring stable load-side voltage under fluctuation or unbalance.

6. What should be noted for installation and maintenance?

Installation — cabinet-type (integrated) with three-phase four-wire connection.
Cooling — forced air cooling; ensure adequate ventilation.
Environment — operating temperature -10°C~+50°C, storage -30°C~+70°C.
Maintenance — bypass switch allows switching to bypass state during servicing; modular converter for easy maintenance.

GY-AVC Unified Power Quality Control Device