1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your EARU AC Surge Protective Device (SPD). This device is designed to protect electrical systems and connected electrical apparatus from transient over-voltages caused by lightning strikes and other instantaneous voltage surges. Please read this manual thoroughly before installation and use.
2. Product Overview
The EARU AC SPD is a low-voltage arrester device available in various configurations to suit different electrical systems. It is certified to IEC/EN 61643-1 standards, ensuring reliable performance.
2.1. Variants
The device is available in different pole numbers and discharge current ratings:
- Poles: 1P, 2P, 3P, 4P
- Nominal Discharge Current (In): 20KA or 30KA
- Maximum Discharge Current (Imax): 40KA or 60KA
2.2. Visual Indicator Window
Each module of the SPD is equipped with a visual indicator window to reflect its working state:
- Green: Indicates normal operation.
- Red: Indicates a fault status, meaning the module needs replacement.
3. Specifications
The following table details the key technical parameters of the EARU AC Surge Protective Device:
| Parameter | Value |
|---|---|
| Product Name | Lightning Protection Device |
| Product Function | Lightning Protection |
| Product Material | PC flame retardant shell |
| Mounting | 35mm Rail Mounting |
| Nominal Discharge Current (In) | 20KA / 30KA |
| Rated Frequency | 50/60HZ |
| Maximum Discharge Current (Imax) | 40KA / 60KA |
| Degree of Protection | IP20 |
| Input Voltage | 385V/220V |
| Electric Ratings | 230/400V, AC50/60Hz |
| Standard | IEC/EN 61643-1 |
| Number of Poles | 1, 2, 3, 4 |
| Rated Voltage | 220/380V |
| Certification | CE |
4. Safety Information
WARNING: Electrical circuits are dangerous. Installation and maintenance of this device should only be performed by a qualified and professional electrician to prevent electric shock, fire, or other hazards.
- Always disconnect power before installing or servicing the device.
- Ensure proper grounding according to local electrical codes and standards.
- Do not operate the device if it appears damaged.
- Verify that the device's specifications match your electrical system requirements.
5. Installation (Setup)
The EARU AC SPD is designed for 35mm DIN rail mounting. Follow these general steps for installation. Refer to the wiring diagram for specific connection details.
5.1. Mounting
- Ensure the main power supply is OFF.
- Mount the SPD securely onto a standard 35mm DIN rail within your electrical panel.
5.2. Wiring Connections
The surge protector should be connected directly to the home's main air switch or leakage protection device. The connection involves pulling out the line in parallel and then connecting the grounding wire.
- Live Wire (L): Connect the live wire(s) from your electrical system to the 'L' terminals of the SPD.
- Neutral Wire (N): Connect the neutral wire to the 'N' terminal of the SPD (for 1P, 2P, 3P, 4P models as applicable).
- Grounding Wire: The ground line should be connected to the incoming main ground line. Ensure a robust and reliable ground connection.
Important Note: The ground line should be rented rather than created from the incoming line. Always ensure proper grounding for effective surge protection.
6. Operation
Once correctly installed and power is restored, the EARU AC SPD operates automatically. The visual indicator window on each module provides immediate feedback on its status:
- A green indicator signifies that the module is functioning normally and providing protection.
- A red indicator signifies that the module has absorbed a significant surge and is now in a fault state, requiring replacement.
7. Maintenance
Regular inspection of your EARU AC SPD is crucial to ensure continuous protection:
- Visual Inspection: Periodically check the visual indicator window on each module.
- Replacement: If any indicator window turns red, the corresponding module has reached its end-of-life and must be replaced immediately by a qualified electrician.
- Cleaning: Keep the device free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
8. Troubleshooting
8.1. Indicator is Red
Problem: The visual indicator window on one or more modules is red.
Solution: A red indicator means the module has been activated by a surge and is no longer providing protection. The module needs to be replaced. Contact a qualified electrician for replacement.
8.2. No Power After Installation
Problem: After installing the SPD and restoring power, there is no power to the protected circuit.
Solution:
- Immediately turn off the main power supply.
- Verify all wiring connections are correct and secure according to the diagram.
- Check if any circuit breakers or RCDs have tripped.
- If the issue persists, consult a qualified electrician.
9. User Tips
- Choosing for Three Phases: For three-phase electrical systems, you will typically need a 3P (3-pole) or 4P (4-pole) SPD, depending on your specific system configuration (e.g., 3-phase + neutral). Always consult with a qualified electrician to determine the correct pole configuration and current rating for your specific three-phase setup.
- Regular Checks: Make it a habit to periodically check the indicator windows, especially after severe weather conditions like thunderstorms.
10. Warranty and Support
For any questions, technical support, or warranty claims, please contact the seller or manufacturer directly. Ensure you have your purchase details and product model information available.
