Product Description:
The CHINT NXM-800H/4300 800A 4-Pole MCCB is a high-capacity molded case circuit breaker designed for heavy-duty three-phase + neutral (4P) applications. Built on the rugged NXM-800 frame, this unit delivers 800A of rated current and an impressive breaking capacity of 50kA at 230V / 36kA at 400V, making it ideal for critical infrastructure, utility grids, factories, and commercial power hubs.

Equipped with a fixed thermal-magnetic trip unit, the breaker protects against overloads and short circuits while ensuring full disconnection of phases and neutral for complete system safety.

Key Features:

• ✅ Rated Current: 800A

• ✅ Poles: 4P (3-phase + Neutral)

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

• ✅ Voltage Rating: Up to 800V AC (Ui)

• ✅ Trip Unit: Fixed thermal-magnetic

• ✅ Test Function: Push-to-trip button

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

• ✅ Frame Size: NXM-800 – Heavy-duty industrial class

Technical Specifications:

• Model: NXM-800H/4300

• Rated Current (In): 800A

• Poles: 4P

• Rated Insulation Voltage (Ui): 800V

• Impulse Withstand Voltage (Uimp): 8kV

• Rated Operating Voltage (Ue):

  • 230V: 50kA

  • 400V: 36kA

  • 415V: 36kA

• Breaking Capacity (Icu/Ics):

  • 230V: 50kA / 30kA

  • 400V: 36kA / 20kA

• Frequency: 50/60Hz

• Operating Temp: -25°C to +70°C

• Mounting Type: Fixed, front-connected

• Trip Mechanism: Thermal-magnetic (non-adjustable)

Applications:

• Utility substations and electrical plants

• Main distribution boards in large facilities

• Industrial machinery and heavy loads

• Power backup and critical power systems

• Infrastructure power control with neutral management

• Generator and transformer protection systems