Product Description:
The CHINT NXM-800H/4300 800A MCCB is a heavy-duty molded case circuit breaker built for high-capacity power distribution in industrial, commercial, and utility-grade electrical systems. With a high short-circuit breaking capacity of 50kA at 230V and 36kA at 400–415V, this 3-pole breaker ensures reliable protection from overloads and short circuits in mission-critical environments.

Equipped with a thermal-magnetic trip unit, the NXM-800H offers precision and safety, meeting stringent IEC/EN 60947-2 standards. Its rugged NXM-800 frame allows it to handle intensive electrical loads while saving space in control panels or main switchboards.

Key Features:

• ✅ Rated Current: 800A

• ✅ Breaking Capacity: 50kA @ 230V / 36kA @ 400V

• ✅ Voltage Rating: 800V AC insulation (Ui)

• ✅ Trip Unit: Fixed thermal-magnetic protection

• ✅ Pole Configuration: 3P (Three-phase)

• ✅ Push-to-Trip Function for manual testing

• ✅ Standards: IEC/EN 60947-2, CE, KEMA, EAC certified

• ✅ NXM-800 Frame Size – Built for high-load and industrial-grade panels

Technical Specifications:

• Model: NXM-800H/4300

• Rated Current (In): 800A

• Rated Insulation Voltage (Ui): 800V

• Rated Impulse Voltage (Uimp): 8kV

• Rated Frequency: 50Hz / 60Hz

• Rated Operating Voltage (Ue):

  • 230V: 50kA

  • 240V: 50kA

  • 400V: 36kA

  • 415V: 36kA

• Breaking Capacity (Icu/Ics):

  • 230–240V: 50kA / 30kA

  • 400–415V: 36kA / 20kA

• Operating Temperature: -25°C to +70°C

• Mounting: Fixed front connection

• Certifications: IEC 60947-2, GB/T 14048.2

Applications:

• Main distribution panels in industrial plants

• Power stations and substations

• Utility networks and infrastructure

• Large commercial buildings

• Generator and transformer protection

• High-capacity HVAC and machinery circuits