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MCCB 3P 250A 70kA Thermal Magnetic 250A Frame NM8N Chint

BRAND: CABAC
SKU: 271200
$926.40 List price: $1,235.20
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Chint NM8N 250A 3P MCCB features 70kA breaking capacity, thermal-magnetic trip unit and a 250A frame. Ideal for switchboard mains and sub-mains protection.

Alternatively Known As: CHINT NM8N 250A MCCB, 3-Phase Moulded Case Circuit Breaker, 250A 70kA Circuit Breaker

Technical Specifications
  • Product Type: Moulded case circuit breaker
  • Frame Size: 250A
  • Rated Current: 250A
  • Number of Poles: 3P
  • Trip Unit: Adjustable thermal-magnetic TM
  • Ultimate Breaking Capacity: 70kA at 400V AC
  • Service Breaking Capacity: 70kA at 400V AC
  • Rated Operational Voltage: 400/415V AC and up to 690V AC
  • Rated Insulation Voltage: 1,000V AC
  • Rated Impulse Withstand Voltage: 8kV
  • Thermal Overload Setting: 0.7–1.0 x In
  • Magnetic Short-Circuit Setting: 5–10 x In for 180–250A distribution protection
  • Mechanical Durability: 15,000 operating cycles
  • Electrical Durability: Up to 6,000 cycles at 400/415V AC
  • Installation: Fixed mounting with front connection
  • Operating Temperature: -40°C to +70°C
  • Dimensions (H x L x W): 157mm x 88.7mm x 105mm
  • Weight: 1.85 kg
Key Features
  • 70kA short-circuit breaking capacity at 400V AC
  • Three-pole protection for three-phase electrical distribution systems
  • Adjustable thermal overload and magnetic instantaneous trip settings
  • Suitable for switchboard mains and sub-mains protection
  • 1,000V insulation rating and 8kV impulse withstand rating
  • Resettable protection reduces the need for replacement after overload or fault operation
  • Maintenance-free construction with high mechanical durability
Professional Installation Requirements
  • Installation, testing and commissioning must be carried out by a licensed electrician in accordance with the approved switchboard design, manufacturer instructions and applicable Australian electrical installation requirements. Verify fault levels, discrimination, conductor ratings, enclosure clearances and required RCM or local approval before energisation.
Applications
  • Switchboard mains protection
  • Electrical sub-main protection
  • Commercial and industrial power distribution
  • Three-phase feeder protection
  • Low-voltage distribution panels
  • High prospective fault-current installations
Standards & Compliance
  • Applicable standard: AS/NZS IEC 60947.2:2015 for low-voltage circuit-breakers. Confirm the individual product marking, certification and RCM requirements before use in an Australian installation.
Environmental Benefits
  • Resettable circuit protection can reduce waste compared with single-use fuse replacement
  • Long mechanical and electrical service life can reduce replacement frequency and associated material waste
  • Metal components and thermoplastics may be recoverable through appropriate electrical equipment recycling streams at end of life
Warranty Information

CHINT warranty policy provides 27 months from the date of manufacture for other low-voltage apparatus, subject to purchase through authorised sales channels, warranty conditions and any differing contractual terms.

Available Now

Available through authorised CHINT distributors in Australia.

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