Trade Discount 25%
MCCB 3P 250A 100kA Magnetic Only 400A Frame NM8N Chint
Chint NM8N 250A 3P MCCB features 100kA breaking capacity, magnetic-only trip unit for motor protection and a 400A frame. Ideal for switchboard mains protection.
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Alternatively Known As: CHINT NM8N 400H 250A MCCB, 3-Phase Magnetic Circuit Breaker, Motor Protection MCCB
Technical Specifications
- Product Type: Moulded case circuit breaker
- Frame Size: 400A
- Rated Current: 250A
- Number of Poles: 3P
- Trip Unit: Magnetic-only motor protection
- Ultimate Breaking Capacity: 100kA at 380–440V AC
- Rated Operational Voltage: Up to 690V AC, 50/60Hz
- Rated Insulation Voltage: 1000V
- Rated Impulse Withstand Voltage: 8kV
- Utilisation Category: A
- Mounting: Fixed mounting with front or rear connection options
- Standard Series: NM8N
- Dimensions (H x L x W): 185mm x 113mm x 140mm
- Weight: 4.5 kg
Key Features
- 100kA short-circuit breaking capacity at common three-phase system voltages
- Magnetic-only trip unit designed for motor circuit protection
- 400A frame accommodates a 250A rated current
- Three-pole configuration for three-phase switchboards
- Suitable for fixed front or rear connection installations
- Supports optional accessories including auxiliary contacts, shunt release and undervoltage release
- Designed for industrial, commercial and large-building electrical distribution systems
Professional Installation Requirements
- Installation, selection and commissioning should be performed by a licensed electrician in accordance with AS/NZS 3000, the manufacturer's instructions and applicable switchboard requirements. Confirm prospective fault current, discrimination, conductor capacity and motor starting characteristics before installation.
Applications
- Switchboard mains protection
- Three-phase motor circuit protection
- Industrial power distribution
- Commercial building electrical distribution
- Plant and machinery protection
- High-fault-level distribution boards
Standards & Compliance
- Applicable product standard: AS/NZS IEC 60947.2 for low-voltage circuit-breakers
- Electrical installation and switchboard integration should comply with AS/NZS 3000 and applicable local requirements
Environmental Benefits
- Long mechanical and electrical service life can reduce replacement frequency and equipment waste
- RoHS documentation is available for the NM8N product series
- Reusable metallic and polymer components may be recyclable at end of service life subject to local recycling facilities
Warranty Information
CHINT warranty policy specifies 27 months from the date of manufacture for other low-voltage apparatus sold through authorised channels, subject to contract terms and exclusions including incorrect installation, misuse and unauthorised modification.
Available Now
Available through authorised CHINT distributors in Australia.
