1. Introduction
The DEWIN DEWD9L-R is an advanced 2P AC220V 30mA Automatic Reclosing Circuit Breaker designed to provide leakage and overload protection for electrical circuits. This smart electric circuit breaker (RCBO/MCB) automatically recloses when a fault condition, such as leakage or overload, causes it to trip, ensuring continuous power supply and reducing the need for manual intervention. It is suitable for various applications including home grids, smart homes, and new energy grids.
2. Safety Information
WARNING: Electrical work should only be performed by qualified personnel. Failure to follow these instructions can result in serious injury or death.
- Always disconnect power at the main circuit breaker before installing or servicing the device.
- Ensure the rated voltage and current of the circuit breaker match your electrical system requirements.
- Do not operate the device if it appears damaged.
- Verify all connections are secure and properly insulated.
- Test the leakage protection function regularly using the 'Test Monthly' button.
- This device is designed for indoor use in a dry environment.
3. Product Overview
The DEWD9L-R circuit breaker features several key components for its operation and safety. Understanding these components is crucial for proper installation and use.
Key Components:
- Leakage Switch: Initiates the leakage protection test.
- Status Indicator (PWR): An LED that indicates the working status of the device.
- Product Number (DEWD9L-R): Identifies the specific model.
- Working Mode Selection (AUTO/MANU): A switch to select between automatic reclosing mode and manual operation.
- Locking Device (LOCK): Provides mechanical locking for safety during maintenance.
- Operating Handle: Used for manual ON/OFF switching and resetting.
- Test Monthly Button: Used to manually test the leakage protection function.
4. Specifications
Below are the technical specifications and dimensions for the DEWIN DEWD9L-R Automatic Reclosing Circuit Breaker.
| Parameter | Value |
|---|---|
| Material | PC + Copper |
| Pole Number | 2P |
| Rated Voltage | AC 220V |
| Leakage Current | 30mA |
| Rated Current | 40A |
| Power Input (Standby) | AC max 1VA |
| Power Input (Action) | MAX 20VA |
| Power Voltage Tolerance | -10%, +10% |
| Indicator | Red light-emitting diode |
| Action Time | ≤ 1s |
| Automatic Reclosing Times | 3 times |
| Automatic Reclosing Interval Time | 10 - 60 - 300s |
| Reset Closing Time | No tripping or manual reset within 15 minutes after shutdown |
| Machine Lifespan | 10,000 times |
| Electrical Lifespan | 4,000 times |
| Operating Environment Temperature | -20°C to +55°C |
| Installation Method | 35mm DIN Rail |
| Dimensions (Width x Height x Depth) | 53.5mm x 82mm x 77mm (main body) |
| Auxiliary Part Depth | 45mm |
5. Installation
The DEWD9L-R circuit breaker is designed for installation on a standard 35mm DIN rail.
5.1 Mounting
- Ensure all power to the circuit is OFF at the main breaker.
- Attach the circuit breaker to a 35mm DIN rail by hooking the top edge onto the rail and pressing down until it clicks into place.
5.2 Wiring
Refer to the wiring diagram below for correct connection of power and load lines. The device is a 2-pole breaker, requiring connection to both Neutral (N) and Live (L) lines for both power input and load output.
- Connect the incoming power line (N and L) to the upper terminals of the circuit breaker.
- Connect the outgoing load line (N and L) to the lower terminals of the circuit breaker.
- Auxiliary Connections: The device includes auxiliary terminals (A1, A2, COM, NO) for external control or status indication. Refer to Figure 5 for the terminal layout and internal circuit diagram. These terminals can be used for remote signaling or integration with other control systems (e.g., for a maximum 100mA auxiliary current).
- Ensure all wire connections are tight and secure.
- Once wiring is complete, restore power to the main circuit.
6. Operation
6.1 Power On/Off
After installation and wiring, push the operating handle upwards to the 'ON' position to supply power to the circuit. Push it downwards to the 'OFF' position to cut power.
6.2 Working Mode Selection (AUTO/MANU)
Use the 'Working mode selection' switch (refer to Figure 2) to choose between:
- AUTO (Automatic Reclosing Mode): In this mode, if the circuit breaker trips due to leakage or overload, it will attempt to reclose automatically up to 3 times.
- MANU (Manual Mode): In this mode, the circuit breaker will not automatically reclose after tripping. Manual intervention is required to reset the operating handle.
6.3 Automatic Reclosing Logic
When in AUTO mode, the device follows a specific reclosing sequence:
- If a trip occurs, the device waits for a set interval before attempting to reclose.
- The automatic reclosing interval times are 10 seconds, then 60 seconds, then 300 seconds for subsequent attempts.
- If the fault persists after 3 reclosing attempts, the circuit breaker will remain tripped, and manual inspection and reset will be required.
- The 'Reset closing time' is 15 minutes: if no tripping or manual reset occurs within 15 minutes after a shutdown, the reclosing counter is cleared.
- The Status Indicator (PWR LED) provides visual feedback on the device's state.
7. Maintenance
7.1 Regular Testing
It is recommended to test the leakage protection function monthly by pressing the 'Test Monthly' button (refer to Figure 2). The circuit breaker should trip immediately. After testing, reset the operating handle to restore power.
7.2 Cleaning
Keep the device clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners or solvents.
7.3 Inspection
Periodically inspect the wiring connections for tightness and signs of wear or damage. Ensure the operating handle moves freely.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Circuit breaker trips frequently | Persistent leakage current or overload in the circuit. | Inspect the connected load for faults, damaged insulation, or excessive current draw. Reduce load if overloaded. Consult a qualified electrician. |
| Device does not reclose automatically in AUTO mode | Fault persists after 3 reclosing attempts, or device is in MANU mode. | Check the working mode selection switch. If in AUTO mode, a persistent fault is present. Manually inspect the circuit and reset. |
| Status Indicator (PWR LED) is off | No power supply to the device or internal fault. | Check incoming power supply. Ensure the operating handle is in the 'ON' position. If power is present and LED is off, the device may be faulty. |
| 'Test Monthly' button does not trip the breaker | Leakage protection mechanism is faulty. | The device may be faulty and requires replacement. Do not rely on it for protection. |
9. User Tips
This section is currently unavailable due to the absence of user reviews or Q&A data. For specific usage scenarios or common questions, please refer to the detailed operation section or contact customer support.
10. Warranty and Support
For warranty information, technical support, or any inquiries regarding your DEWIN DEWD9L-R Automatic Reclosing Circuit Breaker, please contact the seller or manufacturer directly. Ensure you have your product model number (DEWD9L-R) and purchase details available when seeking support.