1. Introducció
This manual provides comprehensive instructions for the installation, operation, and maintenance of the Walfront Over Under Voltage Protector. This device is designed to safeguard electrical appliances and circuits from damage caused by voltage fluctuations, including over-voltage i sota-voltage conditions, as well as providing current protection.
Please read this manual thoroughly before installation and operation to ensure proper use and to prevent potential hazards or damage to the device and connected equipment.

Figura 1: Frontal view of the Walfront Over Under Voltage Protector, showing the digital display and control buttons.
2. Característiques del producte
- Pantalla digital: Supports digital display to show working voltage, real-time current value, and other relevant parameters.
- Protecció integral: Offers overload protection, short circuit protection, over-voltage protecció, sota-voltage protection, and leakage alarm functions.
- Construcció duradora: El casing is primarily made of flame-retardant PC material, ensuring durability and resistance to breakage for long-term use.
- Aplicació àmplia: Suitable for various environments including homes, markets, hotels, offices, power distribution systems, industrial equipment, and general mechanisms.
- Fàcil instal·lació: Compact and lightweight design facilitates convenient wiring and installation.

Figure 2: Product features highlighted, including digital display and PC material construction.
3. Especificacions
| Paràmetre | Valor |
|---|---|
| Tipus d'element | Over Under Voltage Protector |
| Material | PC (retardant de flama) |
| Current Setting Range | 1A ~ 63A |
| Més del voltage Interval ajustable | Fins a 500V |
| Sota el voltage Interval ajustable | Down to 140V |
| Temps de retard | De 1 a 300 segons |
| Dimensions del paquet | 4.72 x 3.94 x 3.15 polzades |
| Número de model | WALFRONT5o0v7i13gr |
4. Informació de seguretat
Adherence to safety guidelines is paramount when installing and operating electrical devices. Failure to follow these instructions may result in electric shock, fire, or damage to the product and connected equipment.
- Perill de descàrrega elèctrica: After the product is powered on, do not touch any live parts to avoid electric shock. Always ensure power is disconnected before performing any wiring or maintenance.
- Protecció contra curtcircuits: This product requires working in conjunction with micro-interrupts (circuit breakers) for short circuit protection. Without proper external short circuit protection, the device cannot provide load limiting protection if a short circuit occurs at the input or load end.
- Cablejat adequat: Ensure all wiring is correct and secure. Incorrect wiring, especially of the neutral wire (N), can prevent the protector from functioning properly and may cause damage.
- Compatibilitat de càrrega: Verify that the load current is less than the maximum current value of the product (63A). Mismatching load size can lead to product damage.
5. Instal·lació i configuració
Follow these steps carefully for correct installation of the Over Under Voltage Protector:
- Connectar els terminals: Connect the input and output terminals correctly according to the product markings. Ensure the load current is less than the current value of the product (e.g., 63A).
- Neutral Wire Connection: The neutral wire (N) must be connected correctly and reliably. Incorrect connection of the neutral wire will prevent the protector from functioning properly.
- Comprovació prèvia a l'alimentació: Before connecting to the main power supply, carefully check all wiring. Verify that the wiring is correct, the load size matches the product's current rating, and all wiring screws are tightened. Failure to do so may damage the product.

Figure 3: Wiring diagram and connection points for the voltagi protector.
6. Funcionament
Once properly installed and powered on, the Walfront Over Under Voltage Protector will display real-time voltage and current values on its digital screen.
- Pantalla digital: The device features a clear digital display that shows the working voltage (L1(V), L2(V), L3(V)) for each phase and the current value.
- Configuració ajustable: The protector allows for adjustment of over-voltage i sota-voltage thresholds, as well as delay time. Refer to the on-device labels for "设置" (Settings), "查询" (Query), "上调" (Up), "下调" (Down), and "开关" (Switch) buttons to configure these parameters. Specific adjustment procedures are typically detailed on the device itself or in supplementary quick-start guides.
- Protecció automàtica: The device automatically disconnects the load when voltage or current exceeds the set limits, and automatically reconnects when conditions return to normal after the set delay time.

Figure 4: Digital display showing voltage readings and control buttons for settings adjustment.
7. Manteniment
The Walfront Over Under Voltage Protector is designed for reliable operation with minimal maintenance. However, regular checks and adherence to safety protocols are recommended.
- Circuit Inspection: Due to the product's automatic reset function, if the device frequently connects and disconnects the load, immediately remove the load from electrical appliances and thoroughly check the circuit. Frequent overload connection and disconnection for prolonged periods can damage the product or the electrical circuit.
- Condicions ambientals: Assegureu-vos que el dispositiu funciona dins de les condicions ambientals especificades (temperatura, humitat) per evitar un funcionament incorrecte.
- Neteja: Keep the device clean and free from dust. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
8. Solució De Problemes
If you encounter issues with your Walfront Over Under Voltage Protector, consider the following common scenarios:
- El dispositiu no s'encén:
- Check the main power supply to ensure it is active.
- Verify all wiring connections, especially the neutral wire (N), are secure and correct.
- Ensure the load current does not exceed the product's rated capacity.
- Frequent Disconnection/Reconnection:
- This indicates that the voltage or current is frequently fluctuating outside the set parameters.
- Immediately disconnect the load and inspect the connected circuit for faults, overloads, or unstable power supply.
- Adjust the over-voltage/sub-voltage thresholds or delay time if the fluctuations are within acceptable operational limits for your equipment but triggering the protector too often.
- No Protection Function:
- Ensure the device is correctly wired and powered.
- Confirm that external micro-interrupts (circuit breakers) are installed and functioning for short circuit protection, as this device relies on them for comprehensive protection.
Si els problemes persisteixen després de seguir aquests passos, poseu-vos en contacte amb l'atenció al client.
9. Aplicacions
The Walfront Over Under Voltage Protector is versatile and can be used in a wide range of settings to protect electrical systems and appliances:
- Ús residencial: Ideal for protecting home appliances and entire household electrical systems from voltage fluctuacions.
- Commercial Establishments: Suitable for markets, hotels, and offices to ensure stable power supply for various equipment.
- Aplicacions industrials: Can be integrated into industrial equipment and mechanisms for enhanced electrical safety and reliability.
- Distribució d'energia: Useful in power distribution systems to monitor and regulate voltage i corrent.


Figura 5: Examples of diverse applications for the voltage protector in various settings.
10. Garantia i Suport
For warranty information and customer support, please refer to the documentation provided with your purchase or visit the official Walfront weblloc web. Conserveu el rebut de compra com a comprovant de compra per a qualsevol reclamació de garantia.
For technical assistance or inquiries, please contact Walfront customer service through their official channels.
