CHINT 400A circuit breakers

 CHINT 400A circuit breakers are critical components for industrial and commercial power distribution, designed to protect electrical systems from overloads, short circuits, and other faults. Here's a comprehensive overview based on available models and specifications:

1. Key Models & Technical Specifications**

- **NM1-400S/3300*CHINT circuit breaker price*  

  - **Type**: Molded Case Circuit Breaker (MCCB)  

  - **Rated Current**: 400A  

  - **Voltage**: AC 400V/690V  

  - **Breaking Capacity**: 50kA  

  - **Features*CHINT contactor price*:  

    - Thermal-magnetic tripping for overload and short-circuit protection.  

    - Compact design with a width of 100mm (3-pole), suitable for DIN rail mounting.  

    - Optional accessories: auxiliary contacts, shunt trip, undervoltage release.  

  - **Applications**: General industrial distribution, motor control centers, and lighting circuits.  

- **NXM-400S/3P-400A*CHINT surge protector price*  

  - **Type**: MCCB  

  - **Rated Current**: 400A  

  - **Voltage**: AC 400V  

  - **Breaking Capacity**: 50kA  

  - **Features**:  

    - High short-circuit breaking capacity for demanding environments.  

    - Available with electronic trip units for precise current adjustment.  

    - Compliant with IEC 60947-2 and GB/T 14048.2 standards.  

  - **Applications**: Heavy-duty machinery, construction sites, and renewable energy projects.  

- **BDZ52-400A (Explosion-Proof)*Chint NXR series thermal overload relays price*  

  - **Type**: Explosion-proof MCCB  

  - **Rated Current**: 400A  

  - **Voltage**: AC 380V  

  - **Breaking Capacity**: 50kA  

  - **Features**:  

    - Designed for hazardous areas (Zone 1/2, IIA/IIB/IIC).  

    - Aluminum alloy housing with IP55 protection.  

    - Suitable for oil refineries, chemical plants, and mining.  

- **NA1 Series (Frame Circuit Breaker)**  

  - **Type**: ACB (Air Circuit Breaker)  

  - **Rated Current**: 400A (available in NA1-1000/400A)  

  - **Voltage**: AC 400V/690V  

  - **Breaking Capacity**: 42-120kA  

  - **Features**:  

    - Intelligent trip units with communication interfaces (Modbus).  

    - Suitable for high-voltage applications in smart buildings and power plants.  

  - **Applications**: Main distribution boards, large-scale industrial systems.  

2. Selection Guide**

- **Current Rating**:  

  Ensure the breaker's rated current matches the maximum load current (e.g., 400A for motors up to 200kW at 400V).  

- **Breaking Capacity**:  

  Choose based on the fault level of the installation (e.g., 50kA for industrial settings, 100kA for power plants).  

- **Environmental Requirements**:  

  - **Explosion-proof**: Use BDZ52-400A for hazardous zones.  

  - **High temperature**: NXM series with temperature compensation.  

- **Additional Functions**:  

  - **Electronic trip units**: For adjustable protection settings (e.g., NXM-400S).  

  - **Communication**: NA1 series supports remote monitoring via Modbus.  

3. Price Range**

- **Domestic (China)**:  

  - NM1-400S: ¥800–1,500  

  - NXM-400S: ¥1,200–2,000  

  - BDZ52-400A: ¥2,500–4,000  

- **International**:  

  - NM1-400S: $150–250 (Amazon, RS Components)  

  - NXM-400S: €200–300 (Alibaba)  

4. Authorized Suppliers**

- **China**:  

  - **Noyi Electric**: National distributor with technical support (400-888-XXXX).  

  - **Gongboshi.com**: Online platform for industrial components.  

- **Global**:  

  - **RS Components**: Stockist of CHINT products in Europe.  

  - **Kempston Controls**: Offers worldwide shipping.  

5. Alternatives & Compatibility**

- **Schneider Electric**:  

  - Model: Masterpact NW1-630 (400A, 80kA)  

  - Price: ~$1,500  

  - Advantage: Higher breaking capacity and digital interface.  

- **ABB**:  

  - Model: Emax 2 E1B (400A, 50kA)  

  - Price: ~$1,200  

  - Advantage: Compact design and energy monitoring.  

Siemens**:  

  - Model: 3WL13 (400A, 50kA)  

  - Price: ~$1,000  

  - Advantage: Integration with Siemens PLC systems.  

6. Maintenance & Troubleshooting**

- **Regular Checks**:  

  - Clean contacts every 6 months to prevent oxidation.  

  - Verify trip settings annually using a circuit breaker tester.  

- **Common Issues**:  

  - **False tripping**: Check for loose connections or incorrect current settings.  

  - **Failure to trip**: Inspect thermal-magnetic elements for wear.  

For detailed product specifications or custom solutions, contact CHINT's technical support or visit their official website .