1. Introduction and Overview
The EOENKK JJVPD1-63F series is an advanced adjustable digital over/under voltage and over-current protector designed to safeguard your electrical appliances from harmful power fluctuations. This device features dual digital displays for real-time voltage and current monitoring, along with user-configurable protection parameters and automatic recovery functions. It is suitable for DIN rail mounting in various electrical distribution systems.

Figure 1: Front view of the JJVPD1-63F Protector
2. Safety Information
- Always disconnect power before installing or performing any maintenance on the device.
- Installation should be performed by a qualified electrician to ensure compliance with local electrical codes and safety standards.
- Do not operate the device if it appears damaged or malfunctioning.
- Ensure proper grounding to prevent electrical shock.
- This device is designed for 230VAC 50/60Hz systems. Do not use it with 120V systems or other incompatible voltages.
3. Product Features
- Over-voltage Protection: Protects against excessively high voltage.
- Under-voltage Protection: Protects against dangerously low voltage.
- Over-current Protection: Guards against excessive current draw.
- Automatic Recovery: Automatically restores power once conditions return to normal.
- Dual Digital Display: Shows real-time voltage and current measurements.
- Adjustable Parameters: Allows users to set custom protection values and delay times.
- Voltage Calibration: Fine-tune voltage readings by +/-10% (A13 setting).
- Current Calibration: Fine-tune current readings by +/- 9/5% (A15 setting).
- Fault Inquiry: Press the UP button for more than 12 seconds to check fault history.
- Factory Reset: Press the DOWN button for more than 12 seconds to restore default settings.

Figure 2: Key Functional Selling Points
4. Specifications
| Function | Technical Parameter | Function | Technical Parameter |
|---|---|---|---|
| Input Voltage | AC 140-300V | Power-on Delay Time | 1-500s (default 10s) |
| Over-voltage Protection Value | 230-300V (default 270V) | Over-voltage Recovery Value | 225-295V (default 250V) |
| Under-voltage Protection Value | 140-210V (default 170V) | Under-voltage Recovery Value | 145-215V (default 190V) |
| Over-current Protection Value | 40A Model: 1-40A (default 20A) 63A Model: 1-63A (default 40A) 80A Model: 1-80A (default 60A) | Over-current Recovery Value | 0.5-39.5A (for 40A model) 0.5-62.5A (for 63A model) 0.5-79.5A (for 80A model) |
| Recovery Delay Time | 1-500s (default 30s) | Action Time (Protection) | 0.1-30s (default 1s) |
| Continuous Over Current Faults Times | 1-20 times (default OFF) | Power Consumption | <2W |
| Electrical and Mechanical Life | ≥100,000 cycles | Installation | 35mm DIN rail |
| Boundary Dimension | 86mm (H) x 38mm (W) x 68mm (D) |
Figure 3: Main Technical Parameters

Figure 4: Product Dimensions
5. Installation
5.1 Mounting
The protector is designed for standard 35mm DIN rail mounting. Simply clip the device onto the DIN rail in your electrical panel.

Figure 5: DIN-Rail Mounting
5.2 Wiring
Ensure all power is disconnected before wiring. Connect the input (IN) and output (OUT) terminals as shown in the diagram below. The 'N' terminal is for Neutral and 'L' for Live. When inserting power lines through the L and N terminals, ensure to screw down firmly to penetrate the insulating layer of the power lines for a secure connection.

Figure 6: Wiring Diagram
- IN: Power input terminals (L for Live, N for Neutral).
- OUT: Protected power output terminals (L for Live, N for Neutral).
6. Operation
6.1 Initial Power-On
After connecting the product, there will be a power-on delay. You must wait approximately 10 seconds (default power-on delay time, adjustable from 1s to 500s). The device will begin normal operation once the red light turns off.
6.2 Button Functions

Figure 7: Function Button Display
- Power Button (⑂): Toggles the protection function ON/OFF.
- SET Button: Enters and confirms parameter settings.
- Up Arrow (▲): Increases parameter values or navigates menus.
- Down Arrow (▼): Decreases parameter values or navigates menus.
6.3 Parameter Setting
To adjust protection parameters:
- Press the SET button to enter the setting mode. The display will show a parameter code (e.g., A1, A2).
- Use the Up (▲) and Down (▼) arrow buttons to navigate through the parameters (A1 to A15, R5, R6).
- Once the desired parameter is displayed, press SET again to modify its value.
- Use the Up (▲) and Down (▼) arrow buttons to adjust the value.
- Press SET to confirm the new value and move to the next parameter, or press and hold SET to exit the setting mode.

Figure 8: Product Setting Parameters (A1-A12)

Figure 9: Product Setting Parameters (R5-R6) and Manual Switch
6.4 Restore Factory Settings
To restore the device to its default factory settings, press and hold the Down (▼) button for more than 12 seconds.
6.5 Fault Inquiry
To inquire about past faults, press and hold the Up (▲) button for more than 12 seconds.
7. Troubleshooting
- No Display/No Power: Ensure the input power is connected correctly and within the specified voltage range (AC 140-300V). Check all wiring connections.
- Device Not Activating: After initial power-on, allow for the default 10-second power-on delay. If the issue persists, check input voltage and current.
- Frequent Tripping: Review your set over-voltage, under-voltage, and over-current protection values. They might be set too sensitively for your load or power supply conditions. Adjust the action and recovery delay times if necessary.
- Incorrect Voltage/Current Readings: Use the voltage calibration (A13) and current calibration (A15) features to fine-tune the readings if you have a known accurate reference meter.
- Device Not Protecting: Ensure the protection function is enabled (not manually switched OFF). Check if the fault inquiry (press UP for 12s) indicates any issues.
8. Maintenance
The EOENKK Voltage & Current Protector is designed for minimal maintenance. However, regular checks can ensure optimal performance and longevity:
- Visual Inspection: Periodically inspect the device for any signs of physical damage, loose connections, or discoloration.
- Cleaning: Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connection Check: Ensure all terminal screws remain tight to prevent arcing or overheating.
9. User Tips
- Voltage Compatibility: This device is specifically designed for 230V AC systems. It is not compatible with 120V AC systems. Using it with an incorrect voltage may damage the device or connected appliances.
- Setting Defaults: If you are unsure about specific parameter settings, it is often best to start with the default values and adjust them gradually based on your system's requirements and stability.
- Power-on Delay: Remember the initial power-on delay. This is a normal function to allow the system to stabilize before power is supplied to your appliances.
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.





