*1. Function and Scope of Application- **Function**: Current-limiting high-breaking miniature circuit breaker with overload and short-circuit
protection.- **Scope of Application**:
- AC 50Hz, rated voltage 230V/400V, rated current up to 63A.
- Not suitable for motor protection.- **Operating Environment**:
- Altitude not exceeding 2000m.
- Ambient temperature: -5℃ to +40℃, average temperature not exceeding +35℃.
- Humidity: Not exceeding 50% at +40℃, up to 90% at 20℃.
- Installation category: II, III.
- Pollution degree: 2.
- No explosive or corrosive gases, dust, rain, snow, or significant vibration.
**2. Model and Its Meaning**- **Model Example**: DZ47-63
- DZ: Miniature circuit breaker.
- 47: Design number.
- 63: Frame size.
**3. Technical Characteristics**- **Classification**:
- By instantaneous tripping current: Type C, Type D.
- By number of poles: 1P, 2P, 3P, 4P.
**4. Usage and Maintenance**- **Inspection**:
- Check if the technical parameters on the print match the requirements.
- Use a 500V megohmmeter to check insulation resistance.- **Operation Check**: Open and close several times to ensure smooth operation.- **Temperature Setting**: 30℃±5℃.
**5. Warnings and Safety Information**- **Precautions**:
- Only for overload and short-circuit protection.
- Installation must be done by professionals.
- Do not operate with wet hands.
- Do not operate under live conditions.
- Perform insulation tests before use.
- Do not short-circuit live wires.
- Do not adjust the factory settings.
- Investigate the cause of tripping before resetting.
**6. Common Faults and Solutions**- **Faults**:
- Failure to close.
- Overheating at terminals.
- Frequent tripping.- **Solutions**:
- Eliminate short circuits.
- Reduce load.
- Replace faulty mechanisms.
- Tighten terminal screws.
- Replace oxidized terminals.
