1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your DIANQI Adjustable Over/Under Voltage and Current Protector Relay. This device is designed to protect your electrical appliances and circuits from damage caused by voltage fluctuations (over-voltage and under-voltage) and excessive current (over-current). It features a dual LED display for real-time monitoring of voltage and current, and adjustable protection parameters to suit various home usage scenarios.
2. Safety Information
- Electrical Hazard: Installation and maintenance should only be performed by qualified personnel. Ensure power is disconnected before any wiring or servicing.
- Proper Grounding: Ensure the electrical system is properly grounded according to local electrical codes.
- Operating Environment: Do not expose the device to moisture, extreme temperatures, or corrosive environments.
- Load Capacity: Do not exceed the maximum rated current (40A or 63A) of the device.
- Children Safety: Keep the device out of reach of children.
3. Product Overview
3.1 Features
- Dual LED display for simultaneous voltage and current monitoring.
- Adjustable over-voltage protection range (130-300V).
- Adjustable under-voltage protection range (80-210V).
- Adjustable over-current protection (1-63A).
- Power-on delay time setting (1-999S).
- Automatic recovery after fault clearance.
- DIN rail mounting for easy installation.
3.2 Components
The protector features a compact design with clear indicators and control buttons:
- Red LED Display: Shows voltage (V).
- Green LED Display: Shows current (A).
- Indicators: LEDs for Over Voltage (>V), Under Voltage (<V), Over Current (>A), and Power.
- Buttons: 'M' (Menu/Mode), Up Arrow, Down Arrow, Power (On/Off/Reset).
- Input Terminals (IN): N (Neutral), L (Live) for power input.
- Output Terminals (OUT): N (Neutral), L (Live) for protected load output.
4. Specifications
| Parameter | Value |
|---|---|
| Working Voltage | 230V~ (AC 80-300V) |
| Frequency Range | 40-70Hz |
| Rated Current | 40A / 63A (selectable) |
| Over-voltage Protection Range | 130-300V |
| Under-voltage Protection Range | 80-210V |
| Over-current Protection Range | 1-63A |
| Power-on Delay Time | 1-999S |
| Over-current Delay Time | 0.1-10.0S |
| Measurement Accuracy | 1% ± 3 |
| Installation | 35mm DIN Rail |
| Installation Dimension | 2P air switch position (38mm width, 86mm height, 66mm depth) |
| Power Consumption | <1W |
5. Setup and Installation
5.1 Mounting
The protector is designed for 35mm DIN rail mounting. It can be installed into a standard meter box with rails, similar to a 2P circuit breaker size.
5.2 Wiring Diagram
Follow the wiring diagram carefully. Ensure all connections are secure and correctly polarized (Live 'L' and Neutral 'N').
Wiring Steps:
- Ensure the main power supply is OFF.
- Connect the incoming Live (L) and Neutral (N) wires from your power source to the 'IN' terminals of the protector.
- Connect the outgoing Live (L) and Neutral (N) wires from the 'OUT' terminals of the protector to your load (e.g., distribution box, appliances).
- Double-check all connections for tightness and correctness before restoring power.
6. Operating Instructions
6.1 Initial Power-On
After correct installation and wiring, turn on the main power. The device will perform a self-check and then display the current voltage and current readings. The 'POWER' indicator will light up.
6.2 Display Toggle
Press the 'M' button to cycle through different display modes (e.g., voltage only, current only, alternating display).
6.3 Setting Parameters
To enter the setting menu, press and hold the 'M' button for approximately 3 seconds until the display changes to 'P1'. Use the Up and Down arrow buttons to navigate through the parameters (P1-P20) and adjust their values. Press 'M' again to confirm a setting and move to the next parameter. Press the Power button to exit the setting mode.
| Parameter | Description | Range | Default |
|---|---|---|---|
| P1 | Overvoltage Protection Value | 230-300V | 270V |
| P2 | Overvoltage Recovery Value | 225-295V | 265V |
| P3 | Overvoltage Delay Time | 1-30S | 30S |
| P4 | Undervoltage Protection Value | 130-210V | 170V |
| P5 | Undervoltage Recovery Value | 135-215V | 175V |
| P6 | Undervoltage Delay Time | 1-30S | 30S |
| P7 | Overcurrent Protection Value | 1-63A | 63A |
| P8 | Overcurrent Delay Time | 0.1-10.0S | 0.5S |
| P9 | Power-on Delay Time | 1-999S | 30S |
| P10 | Overcurrent Correction | -10% to +10% | 0% |
| P11 | Voltage Correction | -10% to +10% | 0% |
| P12 | Current Correction | -10% to +10% | 0% |
| P13 | Display Mode | 1: Manual, 2: Auto, 3: Cycle | 3 |
| P14 | Power-on State | ON/OFF | ON |
| P15 | Overcurrent Trip Count | 0-999 | 0 |
| P16 | Password | 000-999 | 000 |
| P17 | Restore Factory Settings | ON/OFF | OFF |
| P18 | Backlight | ON/OFF | ON |
| P19 | Display Refresh Rate | 1-999 | 1 |
| P20 | Protection Mode | 1: Voltage, 2: Current, 3: Both | 3 |
6.4 Other Functions
- Manual Power On/Off: Briefly press the Power button to manually turn the output on or off.
- Reset: Press and hold the Power button for at least 5 seconds to reset the device to its default parameters.
- Setting Error: The over-voltage protection value (P1) must always be set higher than the under-voltage protection value (P4).
- Accuracy Reference: For precise voltage and current measurements, it is recommended to use a multimeter for calibration reference.
7. Maintenance
- Cleaning: Use a dry, soft cloth to clean the device. Do not use abrasive cleaners or solvents.
- Connection Check: Periodically inspect wiring connections to ensure they are tight and free from corrosion.
- Environmental Conditions: Ensure the operating environment remains within specified temperature and humidity ranges.
- No User-Serviceable Parts: Do not attempt to open or repair the device yourself. Refer to qualified service personnel for any repairs.
8. Troubleshooting
- No Display/No Power: Check the main power supply and wiring connections. Ensure the device is receiving power.
- Device Trips Frequently: Review your set protection parameters (P1, P4, P7). Ensure they are appropriate for your load and power supply conditions. Check for actual over-voltage, under-voltage, or over-current conditions in your circuit.
- Incorrect Readings: If readings appear inaccurate, consider using a multimeter to verify the actual voltage and current. Adjust correction parameters (P10, P11, P12) if necessary, or perform a factory reset (P17).
- Device Does Not Recover: Check the recovery values (P2, P5) and delay times (P3, P6, P8, P9). Ensure the fault condition has cleared and the recovery parameters allow the device to re-engage.
9. User Tips
Based on available information, no specific user tips from reviews or Q&A were found regarding the operation or common usage scenarios of this product. Always refer to the detailed operating instructions and safety guidelines provided in this manual.
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.
11. Product Video
Watch a brief overview of the product:
Product showcase video (not an instructional video).
