1. Introduction
The TOMZN TOVPD1-60-EC is an intelligent dual-display voltage and current protective device designed to safeguard your electrical appliances and circuits from damage caused by over-voltage, under-voltage, and over-current conditions. This device features automatic recovery and real-time monitoring of voltage and current, ensuring stable and safe power supply.
Figure 1: Front view of the TOMZN TOVPD1-60-EC device, showing digital displays for voltage and current, and control buttons.
2. Safety Information
Please read and understand all safety instructions before installing or operating this device. Failure to follow these instructions may result in electrical shock, fire, or serious injury.
- Installation should only be performed by a qualified electrician.
- Ensure the power supply is completely disconnected before any installation or maintenance.
- Do not operate the device if it appears damaged.
- Verify all wiring connections are secure and correct according to the wiring diagram.
- This device is designed for indoor use in dry environments.
3. Product Overview & Functions
The TOVPD1-60-EC provides comprehensive protection and monitoring capabilities:
- Over-voltage protection: Automatically disconnects power when voltage exceeds a set limit.
- Under-voltage protection: Automatically disconnects power when voltage drops below a set limit.
- Over-current protection: Automatically disconnects power when current exceeds a set limit.
- Automatic recovery: Restores power automatically after voltage/current returns to normal range and a set delay time.
- Voltage display: Real-time display of the working voltage.
- Current display: Real-time display of the working current.
- Voltage calibration: Allows for fine-tuning of voltage readings (±10% adjustable).
- Restore factory settings: Press the 'down' button for more than 12 seconds.
- Fault inquiry: Press the 'up' button for more than 12 seconds to check fault history.
Figure 2: Detailed view of the device's display and control buttons, including indicators for Over Voltage, Under Voltage, Over Current, and Power.
Figure 3: Overview of the protective functions provided by the device.
4. Specifications
| Function | Technical Parameter | Function | Technical Parameter |
|---|---|---|---|
| Input voltage | AC 140-300V (230V version) / 110VAC 50/60Hz (110V version) | Power-on delay time | 1-500s (default 3s) |
| Over-voltage protection value | 230-300V (default 270V) / 80-300V (default 145V for 110V) | Over-voltage recovery value | 225-295V (default 250V) / 75-295V (default 140V for 110V) |
| Under-voltage protection value | 140-210V (default 170V) / 80-300V (default 90V for 110V) | Under-voltage recovery value | 145-215V (default 190V) / 85-305V (default 95V for 110V) |
| Over-current protection value | 40A: 0.5-40A (default 20A) / 63A: 0.5-63A (default 40A) | Over-current recovery value | 0-39.5A / 0-62.5A |
| Recovery delay time | 1-500s (default 30s) | Action time | 0.1-30s (default 1s) |
| Power consumption | ≤2W | Electrical and mechanical life | ≥100000 cycles |
| Boundary dimension | 86×38×68MM | Wiring | Over-entering down-out |
Note: Default values and ranges may vary slightly between 230V and 110V versions. Always refer to the specific model's markings.
Figure 4: Main Technical Parameters table.
Figure 5: Device dimensions (85mm height, 35mm width, 45mm depth from rail, 65mm total depth).
5. Installation
The TOVPD1-60-EC is designed for 35mm DIN rail installation, making it simple and convenient to integrate into your electrical panel.
Figure 6: DIN rail mounting for easy installation.
Wiring Instructions:
Connect the device according to the following diagram. Ensure all connections are tight and properly insulated.
Figure 7: Easy wiring diagram. When connecting the power line (L and N), screw down to penetrate the insulating layer of the power lines.
Important: Connect the neutral (N) wire correctly. Incorrect wiring can lead to malfunction or damage.
6. Operation and Settings
The device features a user-friendly interface with digital displays and adjustment keys.
Initial Power-On:
Upon initial power-on, the device will typically have a power-on delay (default 10 seconds) before supplying power to the load. This delay helps protect connected equipment from power fluctuations during startup.
Adjusting Protection Values:
The over-voltage, under-voltage, and over-current protection values, along with recovery and action times, are adjustable to suit your specific electricity demand. Use the 'SET' button and the adjustment keys (up/down arrows) to navigate and modify parameters.
Figure 8: Product Setting Flowchart. Press 'SET' to enter settings, use up/down keys to change values, and press 'SET' again to confirm and move to the next parameter. Press the ON/OFF key to turn off protection functions.
Real-time Monitoring:
The device continuously displays the working voltage and current. If the displayed voltage is not correct, you can manually calibrate it using the voltage calibration function (A13).
Figure 9: Real-time clear display of working voltage and current.
Demonstration Video:
Video 1: A demonstration of the TOMZN TOVPD1-60-EC device undergoing overcurrent and undervoltage protection tests on a specialized test bench, showing its tripping and recovery mechanisms.
7. Maintenance
- Keep the device clean and free from dust and moisture.
- Periodically check wiring connections for tightness and signs of wear.
- Ensure proper ventilation around the device to prevent overheating.
- Do not attempt to repair the device yourself. Contact qualified personnel for service.
8. Troubleshooting
- Device not powering on: Check the input power supply and wiring connections.
- Device trips frequently: Review your set over-voltage, under-voltage, and over-current protection values. They might be set too sensitively for your load or power conditions.
- Device does not re-engage after a trip: Ensure the voltage/current has returned to the normal operating range. Check the recovery delay time setting. If the issue persists, verify the voltage range settings, as some units might not re-engage if the voltage is outside a specific recovery range.
- Incorrect voltage/current readings: Use the voltage calibration function (A13) to adjust the display. If calibration doesn't resolve it, the sensor might be faulty.
- Settings not saving after power off: Some devices may require a specific procedure to save settings permanently, or settings might reset if power is completely lost. Consult the fault inquiry function (press UP button >12s) for any error codes.
- Device malfunctions after some time (e.g., incorrect voltage readings, unexpected tripping): This could indicate internal component degradation. Professional inspection is recommended.
9. User Tips
- Proper Configuration is Key: Take the time to correctly configure all protection parameters (over-voltage, under-voltage, over-current, and delay times) to match your specific electrical system and connected loads. This ensures optimal performance and protection.
- Check Neutral Connection: Always ensure the neutral wire is correctly connected. An improper neutral connection can lead to unexpected behavior or failure of the protective functions.
- Understand Power Limits: Be aware of the maximum loading power (e.g., 60A = 13000W, 40A = 8800W for 230V systems) to avoid overloading the device.
- Monitor for Stability: If you experience frequent voltage fluctuations, this device can be very effective. However, if the device starts to show inconsistent readings or unexpected trips over time, it's advisable to check its functionality and settings.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
This device is CE certified, indicating compliance with European safety, health, and environmental protection requirements.
