Product Description:
The CHINT NM8N-1600S TM1250 4B MCCB is a high-capacity 4-pole molded case circuit breaker designed for the protection of large-scale industrial and commercial power systems. Rated at 1250A, it is part of the NM8N-1600S series, offering robust thermal and magnetic protection for overloads and short circuits. The 4-pole design ensures safe disconnection of all live and neutral conductors in three-phase systems.

Built to meet IEC/EN 60947-2 standards, this MCCB is ideal for main incomer applications, generator and transformer protection, and mission-critical infrastructure.

Key Features:

• ✅ Rated Current (In): 1250A

• ✅ Poles: 4P (3-phase + Neutral)

• ✅ Trip Type: Fixed Thermal Magnetic (TM)

• ✅ Frame Size: NM8N-1600S

• ✅ High Breaking Capacity

• ✅ Application: Power distribution, transformer & generator protection

• ✅ Mounting Type: Fixed

• ✅ Standard Compliance: IEC/EN 60947-2

• ✅ Durable & reliable for long service life

Technical Specifications:

• Model: NM8N-1600S TM1250 4B

• Rated Current Setting: 1250A

• Poles: 4B (4-pole, fixed-mounted)

• Rated Operating Voltage (Ue): Up to 690V AC

• Rated Insulation Voltage (Ui): 1000V

• Impulse Withstand Voltage (Uimp): 8kV

• Breaking Capacity: High (dependent on voltage – typically up to 85kA)

• Trip Type: Thermal-Magnetic (non-adjustable)

• Frequency: 50/60Hz

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

• Protection Class: IP20 (internal components)

Applications:

• Main power distribution switchboards

• Transformers and generator panels

• Heavy industrial motor control centers

• Commercial buildings and utility grids

• High-capacity electrical panels requiring neutral isolation