Product Description:
The CHINT NXMLE-400S/3300 400A Earth Leakage MCCB is a high-performance molded case circuit breaker with integrated earth leakage protection, designed to safeguard high-capacity three-phase power systems. With a rated current of 400A and adjustable leakage sensitivity (100mA, 200mA, 300mA), it offers reliable overload, short-circuit, and earth fault protection in one compact unit.

This breaker is built on the NXMLE-400 frame, delivering a breaking capacity of 36kA at 400V, and fully complies with IEC/EN 60947-2 standards. It’s the perfect solution for industrial switchboards, generator panels, and large distribution systems where neutral safety and fault detection are critical.

Key Features:

• ✅ Rated Current: 400A

• ✅ Poles: 3P (Three-phase)

• ✅ Earth Leakage Protection: Built-in ELCB function

• ✅ Adjustable Sensitivity: 100mA / 200mA / 300mA

• ✅ Breaking Capacity: 36kA @ 400V

• ✅ Trip Mechanism: Fixed thermal-magnetic + residual current

• ✅ Test Button: Manual push-to-trip

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

• ✅ Frame Size: NXMLE-400S – Heavy-duty, high-capacity

Technical Specifications:

• Model: NXMLE-400S/3300

• Rated Current (In): 400A

• Poles: 3P

• Rated Insulation Voltage (Ui): 800V

• Rated Impulse Voltage (Uimp): 8kV

• Rated Operating Voltage (Ue): 400V AC

• Breaking Capacity (Icu/Ics):

  • 230V: 50kA / 30kA

  • 400V: 36kA / 20kA

• Residual Current Settings (IΔn): 100 / 200 / 300mA (adjustable)

• Frequency: 50Hz / 60Hz

• Operating Temp: -25°C to +70°C

• Mounting Type: Fixed (front connection)

• Trip Curve: Type C

Applications:

• High-capacity industrial distribution panels

• Backup power systems and generator outputs

• Commercial power protection with leakage risk

• Transformer input/output panels

• Earth fault-sensitive electrical systems

• Energy infrastructure, utilities, and data centers