1. Introduction
The SaNzia TOVPD1-63-EC is a Din Rail mounted adjustable over-voltage and under-voltage protective device, also featuring over-current protection. This relay is designed to safeguard electrical equipment from damage caused by voltage fluctuations and excessive current. It includes an automatic recovery function and displays real-time voltage and current measurements. This manual provides essential information for the safe installation, operation, and maintenance of your device.
2. Safety Information
WARNING: Installation and maintenance of this device must be performed by qualified personnel only. Failure to follow these instructions may result in electrical shock, fire, or serious injury.
- Always disconnect power before installing or servicing the device.
- Ensure proper grounding according to local electrical codes.
- Do not operate the device if it appears damaged.
- Verify that the voltage and current ratings of the device match your application requirements.
- Keep the device away from moisture and extreme temperatures.
3. Product Overview
The TOVPD1-63-EC features a digital display for real-time voltage and current monitoring, along with intuitive buttons for parameter adjustment.

Figure 1: Front view of the SaNzia TOVPD1-63-EC device. This image highlights the digital display, which shows real-time voltage and current readings, and the three control buttons used for setting parameters and navigating menus. The "IN" and "OUT" terminals are also visible at the top and bottom.
Key Functions:
- Over-voltage protection
- Under-voltage protection
- Over-current protection
- Automatic recovery
- Voltage display (voltage measurement)
- Current display (current measurement)
4. Setup and Installation
The TOVPD1-63-EC is designed for 35mm DIN rail installation. Ensure the power supply is disconnected before proceeding.

Figure 2: Side view of the SaNzia TOVPD1-63-EC device. This image provides a perspective of the device's physical dimensions and the location of the input and output terminals, which are clearly marked "IN" and "OUT" at the top and bottom respectively.
4.1. Mounting
- Locate a suitable 35mm DIN rail within your electrical panel.
- Align the device's mounting clip with the DIN rail.
- Press firmly until the device clicks securely into place on the rail.
4.2. Wiring
Connect the incoming power supply to the "IN" terminals (Line and Neutral) at the top of the device. Connect the protected load to the "OUT" terminals (Line and Neutral) at the bottom of the device. Ensure all connections are tight and secure.
- Input (IN): Connect the main power supply (230VAC, 50/60Hz) to the top terminals.
- Output (OUT): Connect the circuit or load to be protected to the bottom terminals.
4.3. Initial Power-on
After ensuring all wiring is correct and secure, restore power to the circuit. The device will perform a power-on delay (default: 10 seconds) before activating the output. The display will show real-time voltage and current.
5. Operating Instructions
The device features a digital display and three buttons for operation: SET, UP (▲), and DOWN (▼).
5.1. Display Modes
In normal operation, the device cycles through displaying the current voltage and current values.
5.2. Parameter Settings
To enter the setting mode, press and hold the SET button for approximately 3 seconds. Use the UP (▲) and DOWN (▼) buttons to adjust values. Press SET again to confirm a setting and move to the next parameter.
| Parameter | Description | Default (40A Model) | Adjustment Range |
|---|---|---|---|
| Over-voltage protection value | Voltage threshold above which protection activates. | 270V | 230V ~ 300V ~ OFF |
| Over-voltage recovery voltage | Voltage at which the device automatically recovers after over-voltage. | 250V | 225V ~ 295V |
| Over-voltage protection action time | Delay before protection activates after over-voltage detection. | 0.5s | 0.1s ~ 30s |
| Over-voltage recovery delay time | Delay before recovery after voltage returns to normal. | 30s | 1s ~ 500s |
| Under-voltage protection value | Voltage threshold below which protection activates. | 170V | 140V ~ 210V ~ OFF |
| Under-voltage recovery voltage | Voltage at which the device automatically recovers after under-voltage. | 190V | 145V ~ 215V |
| Under-voltage protection action time | Delay before protection activates after under-voltage detection. | 0.5s | 0.1s ~ 30s |
| Under-voltage recovery delay time | Delay before recovery after voltage returns to normal. | 30s | 1s ~ 500s |
| Over-current adjustment range | Current threshold above which protection activates. | 20A | 1A ~ 40A |
| Over-current action time | Delay before protection activates after over-current detection. | 0.5s | 0.1s ~ 30s |
| Over-current recovery delay time | Delay before recovery after current returns to normal. | 30s | 1s ~ 500s |
| Power-on delay time | Delay before output activates after power restoration. | 10s | 1s ~ 500s |
5.3. Special Functions
- Voltage Calibration: Voltage can be adjusted by +/-10%. (Specific procedure not detailed in source, typically involves a combination of button presses in setting mode).
- Restore Factory Settings: Press and hold the DOWN (▼) button for more than 12 seconds.
- Fault Inquiry: Press and hold the UP (▲) button for more than 12 seconds to view fault history.
6. Maintenance
The SaNzia TOVPD1-63-EC is designed for minimal maintenance.
- Periodically inspect the device and its connections for any signs of damage, loose wiring, or overheating.
- Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning.
- Do not use abrasive cleaners or solvents.
7. Troubleshooting
If the device is not functioning as expected, consider the following:
- No Display/No Power: Check the main power supply and all wiring connections. Ensure the device is properly seated on the DIN rail.
- Device Trips Frequently: Review your set over-voltage, under-voltage, and over-current protection values. They might be set too sensitively for your application. Use the fault inquiry function (hold UP (▲) for 12+ seconds) to identify the cause of the trip.
- Output Not Activating: Check if the power-on delay time has elapsed. Verify that the input voltage and current are within the normal operating range and not triggering any protection.
- Incorrect Readings: If voltage or current readings appear inaccurate, consider performing a voltage calibration if the option is available and you are qualified.
- Device Malfunction: If issues persist after basic troubleshooting, try restoring factory settings (hold DOWN (▼) for 12+ seconds). If the problem continues, contact qualified service personnel.
8. Specifications
| Parameter | Value (40A Model) |
|---|---|
| Model Number | TOVPD1-60-EC (Note: Product title indicates TOVPD1-63-EC, but description lists TOVPD1-60-EC for parameters. Assuming 40A variant of this series.) |
| Power Supply | 230VAC 50/60Hz |
| Max. Loading Power | 1~40A Adjustable (Default: 40A) |
| Over-voltage Protection Value Range | 230V~300V~OFF (Default: 270V) |
| Over-voltage Recovery Voltage Range | 225V~295V (Default: 250V) |
| Over-voltage Protection Action Time | 0.1s~30s (Default: 0.5s) |
| Over-voltage Recovery Delay Time | 1s~500s (Default: 30s) |
| Under-voltage Protection Value Range | 140V~210V~OFF (Default: 170V) |
| Under-voltage Recovery Voltage Range | 145V~215V (Default: 190V) |
| Under-voltage Protection Action Time | 0.1s~30s (Default: 0.5s) |
| Under-voltage Recovery Delay Time | 1s~500s (Default: 30s) |
| Over-current Adjustment Range | 1~40A (Default: 20A) |
| Over-current Action Time | 0.1s~30s (Default: 0.5s) |
| Over-current Recovery Delay Time | 1s~500s (Default: 30s) |
| Power-on Delay Time | 1s~500s (Default: 10s) |
| Power Consumption | <2W |
| Electrical Machinery Life | 100,000 times |
| Installation | 35mm DIN rail |
Note: The product description mentions "TOVPD1-60-EC" for parameters, while the product title is "TOVPD1-63-EC". The specifications provided here are based on the detailed parameter list for the 40A version as found in the product description.