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The following is the technical analysis and application guide of the AVP63 Overvoltage and Undervoltage Protector. Combining industry standards and the characteristics of mainstream products in the market, it provides you with comprehensive technical parameters, functional features, and selection suggestions:
- Core Technical Parameters
| Parameter Name | Typical Index | Technical Significance |
| Rated Voltage | 220V AC (Compatible with wide voltage input of 180 | Suitable for mainstream singlephase power grids worldwide (such as 220V in China, 230V in Europe, 100V in Japan, etc.) |
| Rated Current | 63A (Maximum continuous load capacity) | Supports highpower devices in households and small commercial places (such as air conditioners, water heaters, charging piles, etc.) |
| Protection Threshold | Overvoltage protection: 240300V (Adjustable) | Set through a knob or button to meet the voltage fluctuation requirements in different regions (such as the scenario of large voltage fluctuations in rural power grids) |
| Undervoltage protection: 170210V (Adjustable) | ||
| Response Time | ≤20ms (Typical value 15ms) | Quickly cuts off the circuit to prevent the equipment from running for a long time under abnormal voltage (such as instant protection during lightning surges) |
| Reset Mode | Automatic reset (within 530 seconds after the voltage recovers) or manual reset (Optional) | Supports unattended scenarios (such as remote monitoring systems) or critical equipment that requires manual confirmation (such as medical equipment) |
| Contact Capacity | 16A/250V AC (Resistive load) | Directly drives small contactors or relays, reducing intermediate links (such as controlling the start and stop of motors below 3kW) |
| Electrical Life | ≥100,000 operations (Resistive load) | Longlife design, suitable for scenarios with frequent actions (such as industrial areas with frequent voltage fluctuations) |
| Mechanical Life | ≥1,000,000 operations (Noload action) | High reliability, reducing maintenance costs (such as installation in outdoor distribution boxes) |
# II. Functional Features and Design Highlights
- Multiple Protection Mechanisms
Overvoltage protection: When the voltage exceeds the set threshold (such as 240V), the circuit is cut off within 0.02 seconds to prevent electrical insulation breakdown (such as TVs, refrigerators, etc.).
Undervoltage protection: When the voltage is lower than the set value (such as 170V), the power is automatically cut off to avoid motor stalling and burning (such as air conditioner compressors).
Phase failure protection: When a singlephase phase failure is detected, the protection is immediately triggered (suitable for the scenario of threephase to singlephase power supply).
Surge suppression: Builtin MOV (Metal Oxide Varistor) absorbs the instantaneous overvoltage generated by lightning strikes or switch operations (such as induced lightning).
- Intelligent Diagnosis and Indication
LED indicator lights
Green: Normal power supply.
Red: Overvoltage or undervoltage alarm.
Fault memory: Records the types and occurrence times of the last 3 faults (such as overvoltage at 245V, occurring at 10:30).
- Environmental Adaptability
Operating temperature: 20°C to +60°C (Adapts to extreme environments such as cold storage and high outdoor temperatures).
Protection level: IP20 (Dustproof, suitable for installation in indoor distribution boxes).
Electromagnetic interference resistance: Passes the EN 550142 standard test to avoid misoperation (such as near strong interference sources like frequency converters).
- Installation and Maintenance
Rail installation: 35mm DIN rail, supporting quick plugging and unplugging (such as dense installation of multiple devices in a distribution box).
Toolfree wiring: Screw terminals support 6mm² wires, reducing installation time (such as rapid deployment by construction personnel).
Contact cleaning: Check the oxidation condition of the contacts every 2 years and polish them with sandpaper if necessary (such as in highhumidity coastal areas).
III. Typical Application Scenarios
| Industry Field | Load Type | Protection Requirements | Installation Location |
| Home/Apartment | Air conditioner, water heater, refrigerator | Electrical appliances damaged due to voltage fluctuations | Inlet terminal of the distribution box |
| Commercial Building | Server, POS machine, LED screen | Data loss or hardware failure | Floor distribution box |
| Industrial Equipment | Small motor, electric welding machine | Motor overheating caused by undervoltage | Equipment control cabinet |
| New Energy | Charging pile, energy storage system | Battery life affected by abnormal power grid | Inside the charging pile |
| Agricultural Irrigation | Water pump, greenhouse controller | Equipment shutdown due to unstable voltage | Field distribution box |
- Selection and Alternative Solutions
- Model Comparison
| Model | Rated Current | Protection Function | Applicable Scenarios |
| AVP63 | 63A | Overvoltage/Undervoltage/Phase failure | 家, small commercial places |
| AVP40 | 40A | Overvoltage/Undervoltage/Surge | Ordinary residential buildings, lowpower devices |
| AVP100 | 100A | Overvoltage/Undervoltage/Overload | Industrial equipment, highpower loads |
| AVP63C | 63A | Overvoltage/Undervoltage/Phase failure/Phase sequence | Threephase to singlephase power supply scenarios |
- Brand Alternative Suggestions
Schneider: iC65N Vigi overvoltage and undervoltage accessory (Needs to be used with a circuit breaker).
ABB: S200 series overvoltage and undervoltage release (Modular design).
Chint: NXB63 overvoltage and undervoltage protector (High costperformance).
- Installation and Wiring Guide
- Wiring Steps
- Poweroff operation: Turn off the main switch of the distribution box to ensure safety.
- Connect the power supply: Connect L (live wire) to terminal 1 and N (neutral wire) to terminal 2.
- Connect the load: Connect the live wire of the load to terminal 3 and the neutral wire of the load to terminal 4.
- Set the threshold: Set the overvoltage/undervoltage protection value through a knob or button (such as overvoltage at 240V, undervoltage at 170V).
- Test the function: Simulate overvoltage/undervoltage situations and observe the actions of the indicator lights and contacts.
- Precautions
The neutral wire must be connected: Some models rely on the neutral wire to detect the voltage, otherwise they cannot work.
Load matching: The maximum load power of the 63A model is approximately 13.8kW (220V×63A), avoid overloading.
Grounding requirements: It is recommended that the grounding resistance of the distribution box ≤ 4Ω to enhance safety performance.
- Fault Troubleshooting and Maintenance
| Fault Phenomenon | Possible Reasons | Solutions |
| Indicator light not on | Power supply not connected or fuse blown | Check the wiring and replace the fuse |
| Frequent tripping | Voltage fluctuations exceed the protection range or the threshold is set improperly | Measure the actual voltage and recalibrate the threshold |
| Contact sticking | Load current exceeds the rated value or contact oxidation | Reduce the load and clean the contacts |
| Reset failure | Voltage has not recovered or the reset time is set too short | Wait for the voltage to stabilize and extend the reset time |
VII. Purchase and Compliance Suggestions
- Certification Requirements
Domestic market: Needs to pass the CCC certification (such as Ganrui AVP63).
Export market: CE (YRO brand), CB (Keqiang brand) certification.
- Price Reference
Unit price: Approximately 2050 yuan per unit (Bulk purchase is negotiable).
Accessory cost: Fuse (Approximately 5 yuan per piece), Rail (Approximately 10 yuan per meter).
VIII. Industry Standards and Trends
- Related Standards
IEC 6164311: Standard for lowvoltage surge protective devices.
GB/T 18802.21: Standard for overvoltage protective devices for household and similar applications.
- Technical Trends
Smart networking: Supports WiFi or Bluetooth and enables remote monitoring through a mobile APP (such as products in the Xiaomi ecosystem).
Energysaving design: Standby power consumption < 0.5W, in line with the EU ERP directive.
For further verification of parameters or to obtain a customized solution, it is recommended to provide specific application scenarios (such as load type, ambient temperature, installation method, etc.) to facilitate the recommendation of the optimal configuration.
