Product Description:
The CHINT NXMLE-250S/3300 250A MCCB is a high-capacity 3-pole molded case circuit breaker with integrated earth leakage protection, delivering total system safety for large 3-phase installations. Combining overload, short-circuit, and ground fault protection in one device, this breaker is ideal for demanding industrial, commercial, and infrastructure applications.

Featuring adjustable earth leakage sensitivity (100mA / 200mA / 300mA), it allows for customizable protection against insulation faults, minimizing fire risk and electric shock hazards. Housed in the durable NXMLE-250 frame, this unit is designed for long-term reliability and compliance with IEC/EN 60947-2.

Key Features:

• ✅ Rated Current: 250A

• ✅ Poles: 3P (Three-phase)

• ✅ Earth Leakage Protection: Built-in (ELCB)

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

• ✅ Breaking Capacity: 36kA @ 400V

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

• ✅ Push-to-Trip Button for manual test

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

• ✅ Heavy-duty Frame: NXMLE-250S

Technical Specifications:

• Model: NXMLE-250S/3300

• Rated Current (In): 250A

• 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 Sensitivity (IΔn): Adjustable – 100 / 200 / 300mA

• Trip Type: C Curve

• Frequency: 50/60Hz

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

• Mounting: Fixed (front connection)

Applications:

• Industrial switchgear and MCC panels

• Generator and backup system protection

• Commercial power distribution boards

• Construction and utility site electrics

• Any system requiring integrated overload and earth leakage detection