1. Introduction
The TOMZN TOVPD3-63VAYA is an intelligent changeover switch designed to protect electrical circuits from over-voltage, under-voltage, and over-current conditions in a 3-phase system. It automatically cuts off the circuit when voltage or current deviates from set parameters and can automatically reset. This device also functions as an auto phase selector, ensuring continuous power supply by switching to an available phase if one fails.
2. Safety Information
WARNING: To avoid danger of suffocation, keep packaging away from babies and children. Do not use this packaging in cribs, beds, carriages, or playpens. This packaging is not a toy.
This product is CE certified, indicating compliance with European safety standards.
2.1. Precautions
- Do not place the device near flammable materials.
- Ensure adequate ventilation during operation.
- Disconnect from power and store properly when not in use for extended periods.
- Installation and operation must be performed by a qualified electrical professional.
- Connect the equipment strictly in accordance with the provided wiring diagram specifications.
- Adjust equipment parameters according to these instructions.
3. Product Features
- Over-voltage protection
- Under-voltage protection
- Over-current protection
- Phase selection (automatic changeover)
- Automatic reset function
- Adjustable action time
- Adjustable reset time
- Real-time display of current and voltage
- Flame retardant shell
- Built-in 63A/100A Magnetic Latching Relay for high current impact resistance.
4. Specifications
| Parameter | Value |
|---|---|
| Brand Name | TOMZN |
| Model Number | TOVPD3-63VAYA |
| Type | Voltage protector, Voltage relay |
| Rated Supply Voltage | AC220V (3-phase) |
| Rated Voltage | 220/380V |
| Max Load Current | 63A |
| Current Protection | 1-63A adjustable |
| Operation Voltage Range | AC140V-300V |
| Rated Frequency | 50/60Hz |
| Hysteresis (Over voltage & asymmetry) | 5V |
| Hysteresis (Under voltage) | 3V |
| Asymmetry Trip Delay | 10s |
| Voltage Measurement Accuracy | ≤1% (over the whole range) |
| Rated Insulation Voltage | 450V |
| Output Contact | 1NO (Normally Open) |
| Electrical Life | 100,000 operations |
| Mechanical Life | 100,000 operations |
| Protection Degree | IP20 |
| Pollution Degree | 3 |
| Altitude | ≤2000m |
| Humidity | <50% at 40°C (without condensation) |
| EU LVD Voltage | High voltage: Above 50Vac or 75Vdc |
| High-concerned chemical | None |
| Is Smart Device | No |
| Origin | Mainland China |
| Certification | CE |
4.1. Product Dimensions
5. Panel Introduction
- Digital Displays: Show real-time voltage for L1, L2, L3 phases and current (A).
- Manual Switch (Power Button): Used to manually turn the device on/off.
- Menu Key (SET Button): Used to enter settings mode and navigate through parameters.
- Adjustment Key + (Up Arrow): Used to increase parameter values.
- Adjustment Key - (Down Arrow): Used to decrease parameter values.
- Fault Indicator: Illuminates when a fault condition is detected.
- L1, L2, L3 Indicators: Show which phase is currently active or powered on.
6. Setup and Installation
6.1. Wiring Diagram
The device is designed for DIN rail mounting. Ensure proper wiring according to the diagram below. All connections should be secure and made by a qualified electrician.
6.2. Initial Installation Steps
- After receiving the product, have an electrical professional perform the installation and operation.
- Connect the equipment in accordance with the wiring diagram specifications provided above.
- According to the instructions, adjust the equipment parameters as detailed in the "Parameter Settings" section.
7. Operating Instructions
7.1. Function Overview
The device automatically cuts off the circuit when the voltage in any phase is too high or too low, or when the current exceeds the set limit. It also features an auto phase selector to maintain power supply.
7.2. Real-time Monitoring
The digital displays on the front panel provide real-time readings of voltage for each phase (L1, L2, L3) and the total current (A). You can manually calibrate voltage and current if they are not correct using the adjustment keys.
7.3. Parameter Settings
Use the (SET) button to enter the settings menu and the (Up) and (Down) buttons to adjust values. Refer to the table below for detailed parameter descriptions and setting ranges.
Key Settings Explained:
- Power-on delay time: Time needed for power-on after external power cut or recovery. (Setting range: 1s-500s, Factory setting: 10s, Step: 1s)
- Over-voltage protection value: When voltage of one phase exceeds this value, the protector cuts off the line and switches to the next phase. If all three phases exceed, it cuts off all lines. (Setting range: 230V-300V, Factory setting: 270V, Step: 1V)
- Over-voltage recovery value: When voltage is 5V or more than 5V lower than the over-voltage protection value, the protector automatically resets. This parameter changes with the over-voltage protection value and does not need to be set independently. (Setting range: 225V-295V, Factory setting: 265V)
- Under-voltage protection value: When voltage of one phase drops below this value, the protector cuts off the line and switches to the next phase. If all three phases are under, it cuts off all lines. (Setting range: 140V-210V, Factory setting: 170V, Step: 1V)
- Under-voltage recovery value: When voltage is 5V or more than 5V higher than the under-voltage protection value, the protector automatically resets. This parameter changes with the under-voltage protection value and does not need to be set independently. (Setting range: 145V-215V, Factory setting: 175V)
- Over-current protection value: When current exceeds this value, the protector cuts off the line. Setting to OFF disables this function. (Setting range: 3A-63A-OFF, 3A-100A-OFF; Factory setting: 40A/60A, Step: 1A)
- Times of continuous over current protection: If continuous over-current protection exceeds the set value, the protector disconnects the line, requiring manual reset. (Setting range: OFF-1-20, Factory setting: OFF, Step: 1)
- Phase sequence switching detection time: Time to detect if the voltage of the priority phase is stable before switching. OFF means no wait. (Setting range: OFF-1S-500S, Factory setting: 10S, Step: 1S)
- Phase sequence recovery switching settings: ON means when the priority phase returns to normal, it will switch to the priority phase. OFF means it will not switch back. (Setting range: ON/ON-OFF, Factory setting: ON)
- Phase sequence recovery time: Time required to switch to priority phase. (Setting range: OFF-1S-500S, Factory setting: 1S, Step: 1s)
- Over-current protection action time: Time needed for protection action when over current occurs. (Setting range: 0.1s-30s, Factory setting: 1.0s, Step: 0.1s)
- Voltage calibration: Corrects voltage error. (Setting range: -9.5%-9.5%, Factory setting: 0, Step: 0.5)
- Current calibration: Corrects current error. (Setting range: -9.5%-9.5%, Factory setting: 0, Step: 0.5)
- Input phase priority selection: Sets the input priority for each phase (e.g., A:L1, B:L2, C:L3). Options include ABC, ACB, BAC, BCA, CAB, CBA. (Factory setting: ABC)
8. Maintenance
- Regularly check for secure connections and any signs of wear or damage.
- Ensure the device area is clean and free from dust and debris to maintain proper ventilation.
- If the device is not in use for extended periods, disconnect it from power and store it in a dry, safe place.
- Do not attempt to repair the device yourself. Contact a qualified technician for service.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on | No input power; incorrect wiring; internal fault. | Check power supply. Verify wiring against diagram. If problem persists, contact support. |
| "Fault" indicator is lit | Over-voltage, under-voltage, or over-current detected. | Check input voltage and current. Device should automatically switch phases or cut off. If manual reset is needed for continuous over-current, press the power button. |
| Incorrect voltage/current readings | Calibration error. | Use the voltage/current calibration setting to adjust readings. |
| Device does not switch phases | Phase sequence switching detection time too long; phase sequence recovery settings are OFF. | Adjust "Phase sequence switching detection time" to a shorter duration or OFF. Ensure "Phase sequence recovery switching settings" is ON if automatic recovery is desired. |
10. User Tips
- Single-Phase Operation: While designed for 3-phase, some users inquire about single-phase use. The device is primarily for 3-phase systems (e.g., L1 at 127 VAC in a 3-phase context). For dedicated single-phase protection, a different model might be more suitable. Consult an electrician for specific application requirements.
- Calibration: If you notice discrepancies in voltage or current readings, utilize the calibration feature in the settings menu for accurate monitoring.
- Priority Phase: Carefully consider and set your input phase priority selection (ABC, ACB, etc.) based on your specific electrical setup to ensure optimal power continuity.
11. Regulatory Compliance
This product complies with the following directives and standards:
- Low Voltage Directive 2014/35/EU
- Electromagnetic compatibility Directive 2014/30/EU
- Restriction of the use of certain hazardous substances (RoHS) Directive 2011/65/EU
12. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.
A comprehensive user manual (PDF) is available for download here.
