1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the ONCCY EDB1-63 DC Miniature Circuit Breaker (MCB) 2-Pole 16 Amp 600V. This device is designed for overload and short circuit protection in solar photovoltaic (PV) systems, energy storage, and other DC applications. Please read this manual thoroughly before installation and operation.
2. Safety Information
WARNING:
Electrical work should only be performed by qualified personnel. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always disconnect power before installing or servicing the circuit breaker.
- Ensure proper grounding.
- Do not operate the circuit breaker if it appears damaged.
- Adhere to all local and national electrical codes.
- The device is designed for DC circuits only. Do not use in AC circuits.
3. Product Overview
The ONCCY EDB1-63 DC MCB is a 2-pole device rated for 16 Amps at 600V DC. It provides reliable protection against overloads and short circuits in DC electrical systems. It is designed for DIN rail mounting and features a robust construction suitable for demanding environments.
Figure 1: Front view of the ONCCY EDB1-63 DC Miniature Circuit Breaker. This image shows the two poles, the ON/OFF switch, and product labeling including brand and model information.
4. Installation
4.1 Mounting
The EDB1-63 MCB is designed for DIN rail mounting. Ensure the DIN rail is securely installed in an appropriate enclosure.
- Align the MCB with the DIN rail.
- Press down firmly until the MCB clicks into place on the rail.
- Verify that the MCB is securely fastened and does not wobble.
4.2 Wiring
Refer to the wiring diagram for correct connection. Ensure all connections are tight to prevent loose contacts and overheating.
- Connect the positive (+) DC input to the designated terminal.
- Connect the negative (-) DC input to the designated terminal.
- Connect the positive (+) DC output to the load.
- Connect the negative (-) DC output to the load.
- Terminal capacity: 2.5-25mm². Fastening Torque of Terminals: 2.5 N.
Figure 2: Wiring diagram showing contact configurations for 1P and 2P models, and physical dimensions of the circuit breaker in millimeters.
5. Operation
5.1 Switching On/Off
- To switch the circuit breaker ON, push the toggle switch upwards to the "ON" position.
- To switch the circuit breaker OFF, push the toggle switch downwards to the "OFF" position.
5.2 Tripping Mechanism
The circuit breaker automatically trips to the "OFF" position in the event of an overload or short circuit. This protects the circuit from damage.
Figure 3: Tripping characteristics curves for B and C type circuit breakers. The graph illustrates the time-current relationship for tripping under overload and short-circuit conditions, indicating the instantaneous tripping range.
6. Maintenance
The ONCCY EDB1-63 MCB requires minimal maintenance. Regular inspections are recommended to ensure optimal performance and safety.
- Visual Inspection: Periodically check the circuit breaker for any signs of physical damage, discoloration, or loose connections.
- Cleaning: If necessary, gently clean the exterior of the circuit breaker with a dry, soft cloth. Do not use liquids or abrasive cleaners.
- Connection Check: Ensure all terminal connections remain tight. Re-tighten if any looseness is detected.
Note: Do not attempt to open or repair the circuit breaker. Refer servicing to qualified personnel.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Circuit breaker trips frequently. | Overload in the circuit, short circuit, or faulty appliance. |
|
| Circuit breaker does not reset. | Persistent overload or short circuit, internal fault. |
|
| Circuit breaker feels hot. | Overload, loose connections, or internal fault. |
|
8. Specifications
| Feature | Specification |
|---|---|
| Model | EDB1-63 |
| Poles | 2P |
| Rated Current (In) | 16 Amps |
| Rated Working Voltage (Ue) | 600V DC |
| Rated Insulation Voltage (Ui) | 1000V |
| Rated Impulse Withstand Voltage (Uimp) | 6kV |
| Frame Current | 63A |
| Rated Short Circuit Breaking Capacity (Icu) | 6kA |
| Electrical Life | 2000 Cycles |
| Mechanical Life | 20000 Cycles |
| Overvoltage Category | III |
| Pollution Degree | 3 |
| Ingress Protection (IP) | IP40 (Wiring port IP20) |
| Ambient Temperature | -30°C to 70°C |
| Storage Temperature | -40°C to 85°C |
| Installation Method | DIN Rail Mount |
| Terminal Capacity | 2.5-25mm² |
| Fastening Torque of Terminals | 2.5 N |
| Standards | AS 60947.3:2018, IEC 60947.2:2015 |
9. Warranty and Support
For warranty information and technical support, please contact ONCCY customer service through their official channels. Keep your purchase receipt for warranty claims.
Manufacturer: ONCCY
