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User Manual

（For AVR-S Series Voltage Stabilizer）

? Product Introduction.........................1/7

? Installation Wiring............................3/7

? Operation Guide............................4/7

? Equipment Cautions.........................5/7

? Maintenance & Fault........................6/7

Important Notice:

When the voltage stabilizer's LCD displays an alarm and the buzzer sounds, immediately save the device

data, shut down the equipment, and arrange for professionals to inspect the power grid lines and

troubleshoot. The voltage stabilizer will cut off the main power supply within 5 minutes!!!

1. Product Introduction

1-1. Overview and Characteristics

This product is a newly developed next-generation intelligent voltage stabilizer. It employs DSP-based measurement chip

control, fast AC sampling, zero-crossing current switching, and rapid compensation voltage stabilization technology, integrating

intelligent instrumentation, fast voltage stabilization, and fault diagnosis functions. The core configuration includes an isolation

transformer, SVC voltage stabilization module, MCU control core + high-precision sampling components, and safety protection

devices, offering advantages in safety, efficiency, precision, energy conservation, and environmental protection. (1) Smart LCD display: The smart meter provides real-time readings of line voltage, phase voltage, current, frequency, temperature, and operational status with high resolution. Featuring a thin-film button for intuitive operation, it ensures

safety and reliability. (2) Three-phase demodulation: The output voltage imbalance is less than 1%, ensuring the accuracy of the output voltage

for each phase remains constant. (3) Wide applicability: The voltage regulation range is broad, which can meet the needs of power supply and grid quality is

poor, voltage fluctuation range is large places and equipment. (4) Intelligent sampling: The microcontroller-based sampling circuit ensures precise sampling. (5) The protector features comprehensive protection: it displays and safeguards against faults including overload, overvoltage, undervoltage, short circuit, and overheating, ensuring safe operation of both the voltage stabilizer and its

load. (6) Powerful preset features: Protection limits can be set freely. (7) High overload capacity: The system employs premium components with excellent performance, capable of continuous

operation at 80% rated load and enduring a 1-minute instantaneous overload (1.5 times rated load) without damage. (8) Adaptability: It has strong adaptability to power grid and load, and can work reliably and continuously under various

harsh power grid and complex load conditions. (9) No distortion: Compensated voltage regulation method, no waveform distortion

(10)Low power loss: The system achieves minimal energy consumption with no-load loss below 0.5%, delivering

substantial savings on electricity bills for customers. (11)Bypass function for easy maintenance: Switches between 'voltage stabilization' and 'direct bypass power supply' for

convenient troubleshooting. 1-2. Environmental Requirements

(1) The voltage stabilizer should be used indoors with good ventilation and a flat, solid floor. (2) No conductive or explosive dust, no corrosive metals, or gases, vapors, or oil mists that may damage insulation. (3) The rated capacity decreases with altitude. (If the altitude exceeds 1000m, the rated capacity is reduced.)

(4) The ambient temperature ranges from-5℃ to +40℃, with a daily average ≤30℃ and an annual average ≤25℃. The

temperature variation rate of the working environment should be ≤5K/h. (Note: The overload capacity will decrease.)

(5) Relative humidity: ≤90%RH (no condensation at 40°C ± 2°C). (6) The waveform of the power supply voltage is approximately a sine wave (THD ≤ 4%). (7) The transient peak voltage (Vp-p) in the power grid is ≤2000V, and there are no lightning strikes. (8) Exposure to radioactive radiation should be avoided. (9) Avoid abnormal mechanical stresses such as impact and vibration. (10)Multiple voltage stabilizers should not be operated in parallel. (11)Sufficient space for heat dissipation and maintenance should be reserved around and on the top of the voltage stabilizer. ■ Note: If any special usage conditions that do not meet the above requirements apply, please negotiate with the seller

during ordering or contact us at any time during use

1-3. Technical Parameters

Rated capacity: See label Phase: See label Output voltage: See label

Input voltage range:

Three-phase V ±15% | Three-phase V ±20% | Three-phase V ±30%

Single-phase V ±15% | Single-phase V ±20% | Single-phase V ±30%

Voltage regulation accuracy: ±

Efficiency: ≥99% Frequency: The input/output frequency is 45 to 65Hz

Response time: <50 ms Stabilization speed: 100

Insulation resistance: The overall insulation resistance

to ground exceeds 5MΩ. Insulation class: E Display: LCD screen

digital display

Output waveform: The output waveform is

distortion-free and contains no harmonic distortion. Instantaneous overload

capacity: 1.5 times rated

current

Cooling method:

Temperature-controlled

forced air cooling

Protection functions: overload, overvoltage, undervoltage, phase loss, and short-circuit

protection

Mode: Long-term

continuous operation

Insulation strength: 2500V/sinusoidal AC voltage for 1 minute without flashover or

breakdown

2. Installation Wiring

● Before installing and wiring, always disconnect the power supply to prevent electric shock and accidents. ● The product must be installed and tested by trained electricians with proper certification. 2-1. Pre-installation Check

(1) Check if the product model and specifications match

your order details, especially capacity and input/output

voltage values. (2) Check whether the factory documents (manual, certificate of conformity, etc.) and the items agreed to

be delivered under the order are complete. (3) Check whether the electrical components in the voltage

stabilizer cabinet are damaged during transportation. (4) Ensure all fasteners are securely fastened and wiring

remains intact. Tighten the control plug to prevent poor

contact. (5) Upon delivery, users should unpack, inspect, and install

the voltage stabilizer within one month to prevent

quality degradation from prolonged storage. Attached wiring diagram:

2-2. Installation Wiring

(1) Positioning:

After passing inspection, the equipment shall be stably

positioned to prevent damage to the housing and internal

components; the chassis shall bear uniform loads, with

sufficient ventilation and maintenance space reserved around

it. (2) Cable selection:

Cable selection: Select compatible cables and

connectors (to ensure reliable connections), considering

factors such as load rate, current-carrying capacity, heat

dissipation, environmental conditions, installation method, and transmission length. The wire gauge should be

determined based on the voltage stabilizer's capacity (with

adequate margin). Copper wire is recommended, with a

selection standard of 3.5A/mm2. (3) Cable connections:

Cable connections: Connect the input line to the \"Input

(R/S/T)\" terminal, the load line to the \"Output (U/V/W)\"

terminal, and the neutral line to the \"N\" terminal (no neutral

connection required for no-load circuits). The chassis ground

wire should be connected to the \"〨\" marked position.

1. The wiring diagram is for reference only; the actual voltage stabilizer markings shall prevail. 2. Strictly follow terminal markings for wiring: Do not reverse input/output and phase/neutral wires, avoid

confusing neutral with ground, and never omit the ground wire. Incorrect connections may cause equipment

failure or damage. 3. The neutral wire must be properly connected (please specify any equipment that does not require a neutral wire when

placing your order). 4. The wiring and connections from the power supply to the voltage stabilizer and from the voltage stabilizer to the load

must ensure good contact, be sturdy and reliable, and be capable of carrying the equipment's rated current.

3. Operation Guide

3-1. Function Operation Instructions:

Main features:

① SET: Function key

② :Increase key

③ :Decrease key

④Man: Press and hold for 3 seconds to enter manual

mode. In manual mode, output voltage can be adjusted

using the Increase and Decrease keys. ⑤Pass: Press and hold for 3 seconds to enter manual

bypass mode.

⑥Switch: Short press to switch between three-phase

and single-phase display in sequence for easy viewing

of voltage and current for each phase. ⑦Input Voltage Display. ⑧Output Voltage Display. ⑨Output Current Display. 3-2. Control Panel Settings:

All voltage settings must be phase voltage settings. Do not use line voltage settings. Remember!

1) *Press and hold ② “Increase key” and ③ “Decrease key” simultaneously for 3 seconds to

enter function codes. Press SET key to switch function codes in sequence. Function code

descriptions are as follows:

*Actual usage code, see unit label.

? 1st code “Ab”: Input voltage flashes, indicating calibration of input voltage. ? 2nd code “A”: Output voltage flashes, indicating calibration of output phase A voltage. ? 3rd code “B”: Output voltage flashes, indicating calibration of output phase b voltage. ? 4th code “c”: Output voltage flashes, indicating calibration of output phase c voltage. ? 5th code “P0”: Setting of regulated voltage value. ? 6th code “P1”: Setting of voltage regulation accuracy. ? 7th code “P2”: Setting of voltage regulation speed; 0–5 represents slow to fast respectively. ? 8th code “C”: Setting of overcurrent protection value. ? 9th code “H”: Setting of overvoltage value. ? 10th code “L”: Setting of undervoltage value. ? 11th code “CON”: Relay output status (0 for contactor, 1 for trip). ? 12th code “CL”: Transformer selection (200 for 2000:1, 300 for 3000:1). ? After completing the above settings, press ⑥ “Switch key” to save and exit to the main interface. 4. Equipment Cautions

The following special precautions are essential for your personal safety and the safe use of the product and

connected devices. Please read them carefully before use and strictly follow them during use. (1) Only certified electricians may install, operate, or maintain this equipment. Unauthorized personnel are strictly

prohibited from handling it. (2) Before installation or maintenance, completely disconnect the input power supply. Ensure all wiring is securely

fastened to prevent disconnection, sparking, contact oxidation, or automatic bypass. Arrange the wiring rationally to

avoid tripping or abrasion. (3) Proper grounding must be ensured. The grounding wire must not be connected to public utilities such as heating, water

supply, or gas. Any safety incidents caused by failure to ground the wire shall be the user's sole responsibility. (4) Do not disassemble the chassis, touch internal components, or unplug cables during operation. Avoid handling the

device with wet hands. Never stand on the chassis or place heavy objects inside. Strictly prevent conductive debris from

entering the enclosure. (5) Unauthorized disassembly or modification is prohibited. Do not clean with corrosive or corrosive solvents. Do not pile

items around the equipment. Ensure good ventilation. (6) If the device is not used for a long time, the power switch should be turned off and the external wiring removed. (7) Select equipment based on actual power consumption with a margin, ensuring voltage harmonic content ≤10%. If the

power factor or voltage is too low, reduce the capacity. (8) The input voltage may fluctuate within ±15% to 30% (based on the product specifications). (9) Lightning protection devices must be installed in areas prone to lightning strikes. Please specify this requirement when

placing your order. 5. Maintenance & Fault

5-1. Daily Maintenance:

Before performing maintenance, always disconnect the power supply to prevent electric shock

or other safety hazards. ● Conduct regular inspections of the voltage stabilizer's operational status during use:

During inspection, verify whether the voltage displayed by the voltage stabilizer, the load (not exceeding the rated value), and the input voltage (not exceeding the allowable fluctuation range) are normal. If abnormalities are detected, address them

promptly. For issues that cannot be resolved immediately, notify the supplier or manufacturer to coordinate a solution to

prevent equipment damage. ● Regular maintenance of the voltage stabilizer is recommended, including:

Regularly clean the voltage stabilizer's stabilizing components (removing dust and dirt to prevent moisture-induced control

circuit failures), inspect the chassis's fasteners and connection terminals (address any looseness or poor contact promptly), and repair or replace faulty/damaged components immediately. 5-2. Fault Handling:

Before performing maintenance, always disconnect the power supply to prevent electric

shock or other safety hazards.

Phenomenon Cause Processing Method

The output voltage is unstable. ①Voltage stabilizer bypass, unable to

automatically stabilize voltage;

①Check if the system is bypassed, if so, switch to a stable voltage state. ②Is the neutral wire disconnected or

virtually connected;

①Check the neutral wire of the neutral

wire connection port;

②Check if the neutral line of the power

grid is connected;

Abnormal voltage or low voltage

occurs after manual bypass

① Input phase loss;

② The input voltage is too low;

①Check input phase. If phase loss

occurs, consult a professional. ②Check input voltage. If below minimum

range, replace with a wider-range unit. The fan does not operate. ①Simply reconnect the plug

②Replace the fan

①Simply reconnect the plug. ②Replace the fan. Abnormal odour from voltage

stabilizer. ①The coil overheats. ②Excessive load current. ③The transformer coil discolors due to

overcurrent. ①Replace protection relay. ②Replace protective resistor. ③Contact manufacturer for repair. Severe output voltage drop after

bypass. The bypass AC contactor is defective Replace the AC contactor. The display panel shows no data

after startup, but voltage regulation

is normal. ①Poor contact of the communication

cable between the display board and the

motherboard;

②Display panel malfunction;

①Reconnect the display cable;

②Replace the display panel;

Unstable voltage after new

installation. The wiring is incorrect, or the neutral wire

is not properly connected. Check if the phase and neutral wires are

properly connected and if the neutral wire

is properly connected. The circuit breaker trips. The trip protector operates. Check the overvoltage, undervoltage and

overcurrent alarm information.

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