SINOTIMER SVP912 Series Adjustable Over/Under Voltage Protector User Manual

1. Introduction

The SINOTIMER SVP912 series automatic over-voltage and under-voltage protector is designed to safeguard single-phase AC 110V/120V, 50/60Hz electrical equipment from damage caused by voltage fluctuations. This device is suitable for residential household box entry or for protecting distribution lines. When the circuit experiences over-voltage or under-voltage conditions, the protector will instantaneously cut off the power supply. Once the voltage returns to normal, the protector will automatically restore power, ensuring continuous protection for your electrical appliances.

2. Safety Information

• Installation and maintenance should only be performed by qualified electricians to prevent electric shock or damage to the device.
• Ensure the power supply is completely disconnected before any installation, wiring, or maintenance work.
• Verify that the voltage and current ratings of the protector match your electrical system requirements.
• Do not operate the device if it appears damaged or malfunctioning.
• Keep the device away from water, moisture, and extreme temperatures.

3. Product Features

• Over-voltage protection
• Under-voltage protection
• Voltage display (voltage measurement)
• Adjustable over-voltage protection value
• Adjustable over-voltage recovery value
• Adjustable over-voltage protection action time
• Adjustable under-voltage protection value
• Adjustable under-voltage recovery value
• Adjustable under-voltage protection action time
• Adjustable fault recovery delay time
• Adjustable delay time after power-on
• Reset mode selection (Automatic/Manual)
• Fault inquiry function
• Restore Factory settings option

4. Specifications

5. Installation and Wiring

The SVP912 series protector is designed for DIN rail installation. Follow the wiring diagram carefully to ensure correct and safe connection.

Wiring Steps:

1. Ensure all power is OFF at the main breaker before starting any wiring.
2. Mount the SVP912 protector onto a standard DIN rail.
3. Connect the incoming Live (L) and Neutral (N) wires from your power source (e.g., Power Switch) to the 'IN' terminals of the Voltage Protector.
4. Connect the outgoing Live (L) and Neutral (N) wires from the 'OUT' terminals of the Voltage Protector to your load circuit, typically through an Air Circuit Breaker.
5. Double-check all connections for tightness and correctness before restoring power.

6. Operating Instructions

Setting Parameters:

1. Enter Setting Mode: Press and hold the SET button for 3 seconds. The digital display will start flashing, indicating you are in setting mode.
2. Navigate Settings: Press the SET button repeatedly to cycle through the different parameters.
3. Adjust Values: Use the ▲ (Up) and ▼ (Down) buttons to adjust the value of the currently selected parameter.
4. Save Settings: After adjusting all desired parameters, continue pressing SET until "END" appears on the display. Press SET one more time to save the data and exit the setting mode. The device will then return to its normal operating state, displaying the current voltage.

Adjustable Parameters (for 110V/120V models):

LED Indicators:

• Over-voltage: The 'Over(V)' indicator flashes quickly.
• Under-voltage: The 'Under(V)' indicator flashes slowly.
• Normal Operation: Both 'Over(V)' and 'Under(V)' indicators are steadily ON.

Reset Mode Selection (AU/HA):

• AU (Auto Reset): The protector will automatically restore power once the voltage returns to normal after a fault.
• HA (Manual Reset): After a fault, the protector will not automatically restore power. You must manually press the SET button to restore power once the voltage is stable.

Fault Inquiry:

In setting mode, navigate to the 'Fault inquiry code' parameter. The display will show 'IUL' for the latest fault. Press the ▲ or ▼ buttons to view the last 5 recorded faults. 'UL' indicates an under-voltage fault, and 'UH' indicates an over-voltage fault. If no fault is recorded, only 'I' will be displayed.

Restore Factory Settings:

To restore the device to its default factory settings, press and hold both the ▲ and ▼ buttons simultaneously for 3 seconds. The 'Under(V)' indicator LED will turn off for 1 second, confirming that the factory settings have been restored.

7. Maintenance

• Regularly inspect the device for any visible damage or loose connections.
• Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning.
• Do not use abrasive cleaners or solvents.
• Ensure proper ventilation around the device to prevent overheating.

8. Troubleshooting

• Device not powering on: Check the incoming power supply and ensure all wiring connections are secure. Verify the main breaker is on.
• Device constantly tripping: Check the current voltage displayed. If it's outside the set over-voltage or under-voltage protection range, the device is functioning as intended. Adjust the protection values if necessary, or consult an electrician to check your power supply stability.
• Cannot configure settings: Ensure you are pressing and holding the SET button for the full 3 seconds to enter setting mode. If the device is unresponsive, try performing a factory reset (see Operating Instructions).
• No power output after a fault: If the reset mode is set to 'HA' (Manual Reset), you must manually press the SET button to restore power after a fault. Check the fault inquiry to understand the cause of the trip.

9. User Tips

• After installation, it is recommended to test the device's functionality by simulating voltage fluctuations (if safely possible) or observing its behavior during normal operation.
• Familiarize yourself with the setting parameters and their ranges to customize the protection according to your specific needs and local voltage conditions.
• If you encounter difficulties with configuration or believe the device is not functioning correctly, refer to the 'Restore Factory Settings' procedure and then re-attempt configuration.

10. Warranty and Support

For detailed warranty information, technical support, or further inquiries, please refer to the official user manual PDF available at User manual (PDF). You may also contact the distributor: