1. Introduction
The EARU EAL-18 Residual Current Circuit Breaker (RCCB) is designed to provide essential leakage protection in electrical circuits. This device is suitable for AC 50Hz systems with rated voltages of 2P 230V or 4P 400V and rated currents ranging from 1A to 63A. Its primary function is to quickly disconnect the power supply in the event of an electric shock or when the grid leakage current exceeds a specified safe value, thereby protecting both personnel and electrical equipment. The EAL-18 is a Type AC RCCB, specifically engineered to detect and respond to power frequency sinusoidal leakage currents, including those that are suddenly applied or slowly rising. It also supports infrequent switching and starting functions for the line. This product complies with the IEC/EN61008-1 standard.
2. Safety Information
Please read and understand all safety instructions before installing, operating, or maintaining this device. Failure to follow these instructions may result in serious injury or property damage.
- Installation and maintenance should only be performed by qualified electricians.
- Always disconnect power before working on electrical circuits.
- Ensure the device's specifications (voltage, current, sensitivity) match your electrical system requirements.
- Do not operate the device if it appears damaged.
- Regularly test the RCCB using the integrated test button to ensure proper functionality.
- This device provides residual current protection but does not protect against overcurrent (overload or short circuit). Additional overcurrent protection devices (e.g., MCBs) may be required.
3. Product Overview
3.1 Key Features
- Type AC RCCB: Designed for power frequency sinusoidal leakage current.
- Leakage Protection: Protects against electric shock and earth leakage faults.
- Anti-Electromagnetic Interference: Enhanced stability in various environments.
- Flame Retardant Material: Constructed from materials that resist combustion.
- Compliance: Meets IEC/EN61008-1 standards.
- Bilateral Busbar Wiring: Offers flexible wiring options.
- High Connecting Ability: Maximum connecting ability of 35mm² with a wiring torque of 3.5N*m.
3.2 Components
This image displays the key parts of the RCCB: the insulated terminal block for secure wiring, the test button for verifying functionality, the EARU brand logo, a window indicating leakage tripping, and a widened handle for easier operation. A basic wiring diagram is also visible.
- Insulated Terminal Block: For secure and safe electrical connections.
- Test Button: Used for manual testing of the leakage protection function.
- Brand Logo: "EARU" and model "EAL-18".
- Leakage Tripping Indicator Window: Visually indicates when the device has tripped due to a leakage current.
- Handle: For switching the device ON/OFF and resetting after a trip.
- Wiring Diagram: Printed on the device for correct installation.
4. Specifications
This image provides physical dimensions and a summary of key product parameters for the EAL-18 RCCB, including pole configuration, frequency, breaking capacity, and rated voltage.
This image details the types of leakage current waveforms the device can detect (AC Type) and provides a table for recommended nominal section areas of copper wire based on rated current.
This image presents a comprehensive table of technical specifications, including rated current, poles, voltage, frequency, sensitivity, breaking capacity, installation details, and environmental operating conditions.
| Attribute | Value |
|---|---|
| Model Number | EAL-18 (RCCB) |
| Type | Residual Current (RCD) |
| Rated Voltage | 2P 230V / 4P 400V |
| Rated Frequency | 50/60Hz |
| Rated Current Options | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Poles | 2P, 4P |
| Rated Sensitivity | 10mA, 30mA, 100mA, 300mA |
| Breaking Capacity | 6KA (Icn=Iac=6000A) |
| Standard | IEC61008-1 |
| Mounting | 35mm Din Rail |
| Insulation Voltage | 500V |
| Dielectric Test Voltage | 2.5kV for 1 min |
| Electrical & Mechanical Life | 4000 cycles |
| Protection Degree | IP20 |
| Ambient Temperature | -5°C to +40°C (with daily average ≤35°C) |
| Storage Temperature | -25°C to +70°C |
| Terminal Connection Type | Cable/U-type busbar/Pin-type busbar |
| Terminal Size Top/Bottom for Cable | 35mm² (18-3) |
| Tightening Torque | 3.5 N·m |
5. Setup and Installation
The EAL-18 RCCB is designed for mounting on a 35mm DIN rail. Ensure all connections are secure and comply with local electrical codes.
5.1 Mounting
- Ensure the main power supply is OFF before installation.
- Attach the RCCB to a standard 35mm DIN rail using its fast clip device.
- Verify that the device is securely fastened and cannot move.
This image illustrates how the RCCB is securely mounted onto a standard DIN rail, highlighting the integrated clip for easy installation and removal.
5.2 Wiring Connections
Connect the incoming and outgoing wires to the insulated terminal blocks. The connection can be made from the top or bottom.
- Use copper wires with a nominal section area appropriate for the rated current (refer to Table 2 below).
- Ensure all connections are tight with a wiring torque of 3.5 N·m.
- The device supports Cable, U-type busbar, and Pin-type busbar connections.
This image displays both the 2-pole (2P) and 4-pole (4P) versions of the EAL-18 RCCB, with their respective wiring diagrams clearly visible on the front panel. The 2P model shows connections for N and L, while the 4P model shows connections for N, 1, 3, 5 and N, 2, 4, 6.
| Rated Current | Nominal Section Area of Copper Wire (mm²) |
|---|---|
| 1~6A | 1 |
| 10A | 1.5 |
| 16, 20A | 2.5 |
| 25A | 4 |
| 32A | 6 |
| 40, 50A | 10 |
| 63A | 16 |
| 80A | 25 |
| 100A | 35 |
6. Operation
6.1 Switching ON/OFF
- To turn the power ON, push the handle upwards to the 'I-ON' position.
- To turn the power OFF, push the handle downwards to the 'O-OFF' position.
6.2 Testing the RCCB
It is crucial to regularly test the RCCB to ensure its proper functioning. A monthly test is recommended.
- Ensure the RCCB is in the 'I-ON' position.
- Press the blue 'TEST' button. The RCCB should immediately trip to the 'O-OFF' position.
- If the RCCB does not trip, it may be faulty and should be replaced immediately by a qualified electrician.
- To reset the RCCB after a test or trip, push the handle fully downwards to 'O-OFF' and then upwards to 'I-ON'.
This video demonstrates the operation of the RCCB, including how to switch it on and off, and how to perform the crucial test function using the test button. It shows the device tripping when the test button is pressed, confirming its leakage protection capability.
7. Maintenance
The EAL-18 RCCB requires minimal maintenance. Regular checks are essential to ensure continued safety and performance.
- Monthly Testing: As described in Section 6.2, press the test button monthly to verify the tripping mechanism.
- Visual Inspection: Periodically inspect the device for any signs of physical damage, discoloration, or loose connections.
- Cleaning: If necessary, gently clean the exterior of the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Professional Inspection: It is recommended to have a qualified electrician inspect your electrical system, including RCCBs, periodically.
8. Troubleshooting
This section addresses common issues you might encounter with your RCCB.
| Problem | Possible Cause | Solution |
|---|---|---|
| RCCB trips frequently without apparent reason. |
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| RCCB does not trip when test button is pressed. |
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| RCCB cannot be reset after tripping. |
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9. User Tips
- Bipolar Configuration: The EAL-18 is available in both 2-pole (bipolar) and 4-pole configurations, allowing for flexibility in various single-phase and three-phase applications. Ensure you select the correct pole configuration for your specific electrical system.
- Complementary Protection: Remember that this RCCB provides residual current protection but does not offer overcurrent protection. For comprehensive circuit protection, it should be installed in conjunction with Miniature Circuit Breakers (MCBs) or other appropriate overcurrent protective devices.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's specific terms and conditions or contact the point of purchase. Keep your purchase receipt as proof of purchase.