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MCCB 4P 250A 70kA Standard Electronic 250A Frame NM8N Chint

BRAND: CABAC
SKU: 271400
$2,183.70 List price: $2,911.60
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Chint NM8N 250A 4P MCCB features 70kA breaking capacity, standard electronic trip unit with protected neutral and a 250A frame. For switchboard mains protection.

Alternatively Known As: CHINT NM8N 250A 4P MCCB, 250A Electronic Moulded Case Circuit Breaker, 70kA MCCB

Technical Specifications
  • Series: NM8N
  • Frame Size: 250A
  • Rated Current: 250A
  • Number of Poles: 4P
  • Trip Unit: EM standard electronic release
  • Breaking Capacity: 70kA at 380–440V AC; 40kA at 500V AC; 8kA at 660–690V AC
  • Rated Operational Voltage: 380/400/415V, 440V, 500V, 660/690V AC, 50/60Hz
  • Rated Insulation Voltage: 1000V
  • Rated Impulse Withstand Voltage: 8kV
  • Neutral Protection: Adjustable protected neutral pole
  • Protection Functions: Long-time, short-time, instantaneous and earth-fault protection
  • Installation: Fixed mounting with top or bottom line entry; vertical or horizontal installation
  • Compliance: IEC/EN 60947-1, IEC/EN 60947-2 and IEC/EN 60947-3
  • Dimensions (H x L x W): 157mm x 88.7mm x 140mm
  • Weight: 2.65 kg
Key Features
  • 250A rated current with a 250A frame size
  • Four-pole configuration for three-phase and neutral switching
  • 70kA ultimate and service short-circuit breaking capacity at 380–440V AC
  • Standard EM electronic trip unit with adjustable protection parameters
  • Four-stage protection including earth-fault protection
  • Real-time current display on the electronic trip unit
  • Adjustable neutral-line protection
  • Suitable for switchboard mains and low-voltage power distribution
  • Optional auxiliary, shunt, undervoltage and motor-operating accessories
Professional Installation Requirements
  • Installation, commissioning and protection-setting adjustments must be performed by a licensed electrical contractor in accordance with AS/NZS 3000, the manufacturer's instructions and the requirements applicable to the switchboard assembly. Verify prospective fault current, discrimination, cable capacity and local RCM requirements before energisation.
Applications
  • Main incoming protection in commercial and industrial switchboards
  • Low-voltage power distribution systems
  • Building services and plant-room electrical distribution
  • Protection of feeders, busbars and large electrical loads
  • Three-phase systems requiring switched and protected neutral conductors
Standards & Compliance
  • AS/NZS 60947.2: Low-voltage switchgear and controlgear — Circuit-breakers; verify certification for the supplied Australian-market variant
  • AS/NZS 3000: Electrical installations, including switchboard installation and wiring requirements
  • IEC/EN 60947-2 product testing and performance standard
Environmental Benefits
  • Electronic protection improves protection accuracy and may reduce nuisance tripping and associated equipment replacement
  • RoHS documentation is available for the NM8N product family, supporting restricted-substance compliance
  • Reusable electrical and metal components can be separated for recycling at end of service life
  • Durable moulded-case construction supports a long service life and reduces replacement waste
Warranty Information

CHINT warranty policy specifies 27 months from the date of manufacture for other low-voltage apparatus sold through authorised sales channels, subject to the applicable contract and warranty conditions.

Available Now

Available through authorised CHINT distributors in Australia.

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