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MCCB 4P 250A 100kA Thermal Magnetic 400A Frame NM8N Chint

BRAND: CABAC
SKU: 269217
$3,440.90 List price: $4,587.90
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Chint NM8N 250A 4P MCCB features 100kA breaking capacity, thermal-magnetic trip unit with protected neutral and a 400A frame. For switchboard mains protection.

Alternatively Known As: Moulded Case Circuit Breaker, Thermal-Magnetic MCCB, 4-Pole Main Circuit Breaker, NM8N-400H TM 4P 250A

Technical Specifications
  • Product Type: Moulded case circuit breaker
  • Frame Rating: 400A
  • Rated Current: 250A
  • Number of Poles: 4P
  • Trip Unit: Thermal-magnetic, TM
  • Breaking Capacity: 100kA Icu and Ics at 380/400/415V AC
  • Rated Operational Voltage: 380/400/415V AC, with series ratings up to 690V AC
  • Rated Insulation Voltage Ui: 1000V
  • Rated Impulse Withstand Voltage Uimp: 8kV
  • Overload Trip Adjustment: 0.7–1.0 x In
  • Magnetic Trip Adjustment: 5–10 x In
  • Neutral Protection: Protected neutral pole
  • Utilisation Category: A
  • Frequency: 50/60Hz
  • Mechanical Life: 15,000 operating cycles
  • Electrical Life: 8,000 cycles at 415V AC
  • Dimensions (H x L x W): 157mm x 88.7mm x 140mm
  • Weight: 2.5 kg
Key Features
  • 100kA short-circuit breaking capacity for high-fault-level installations
  • Thermal-magnetic protection for overload and short-circuit faults
  • Four-pole configuration for three-phase and neutral switching
  • Protected neutral suitable for applications requiring neutral overcurrent protection
  • 400A frame with a 250A rated current
  • Suitable for fixed front or rear connection arrangements
  • Compatible with auxiliary, shunt-trip, undervoltage-release and motorised operating accessories
Professional Installation Requirements
  • Installation, selection, adjustment and commissioning must be performed by a licensed electrician in accordance with the manufacturer's instructions, applicable switchboard requirements and AS/NZS 3000. Confirm fault levels, cable ratings, discrimination and terminal torque before energisation.
Applications
  • Switchboard mains protection
  • Main incomer and sub-incomer protection
  • Industrial and commercial power distribution
  • Power centres and low-voltage switchboards
  • Three-phase systems requiring protected neutral switching
Standards & Compliance
  • AS/NZS IEC 60947.2:2015 for low-voltage circuit-breakers
  • Installation should comply with AS/NZS 3000:2018 where applicable
Environmental Benefits
  • Durable construction and a rated mechanical life of up to 15,000 cycles can reduce replacement frequency and associated waste
  • Copper and metal components can be recovered through established electrical equipment recycling streams
  • Thermal-magnetic protection helps limit equipment damage and extend the service life of downstream electrical assets
Warranty Information

CHINT's general policy for other low-voltage apparatus provides 27 months from the date of manufacture against defects in materials and workmanship when supplied through authorised sales channels, subject to the applicable sales contract and local terms.

Available Now

Available through authorised CHINT distributors in Australia.

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