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MCCB 3P 250A 36kA Thermal Magnetic 250A Frame NM8N Chint

BRAND: CABAC
SKU: 271146
$824.20 List price: $1,099.00
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Chint NM8N 250A 3P MCCB features 36kA breaking capacity, thermal-magnetic trip unit and a 250A frame. Ideal for switchboard mains and sub-mains protection.

Alternatively Known As: Moulded Case Circuit Breaker, MCCB, 3-Phase Circuit Breaker, Main Switch Circuit Breaker

Technical Specifications
  • Product Type: Moulded case circuit breaker
  • Frame Rating: 250A
  • Rated Current: 250A
  • Number of Poles: 3P
  • Trip Unit: Adjustable thermal-magnetic release
  • Breaking Capacity: 36kA at 380V, 400V and 415V AC
  • Rated Operational Voltage: 380V, 400V, 415V, 440V, 500V and 660V/690V AC
  • Rated Insulation Voltage: 1000V AC
  • Rated Impulse Withstand Voltage: 8kV
  • Thermal Trip Adjustment: 0.7–1.0 x In
  • Magnetic Trip Adjustment: 5–10 x In for power distribution protection
  • Mechanical Durability: 15,000 operations
  • Electrical Durability: 1,500 operations at the applicable rated voltage
  • Mounting: Fixed installation
  • Connection: Copper conductors with cable lugs
  • Terminal Tightening Torque: 11Nm for M8 terminals
  • Dimensions (H x L x W): 157mm x 88.7mm x 105mm
  • Weight: 1.85 kg
Key Features
  • Three-pole protection for three-phase distribution systems
  • 250A frame with 250A rated current
  • 36kA short-circuit breaking capacity at common 400V-class supply voltages
  • Adjustable thermal overload and magnetic short-circuit protection
  • Suitable for switchboard mains and sub-mains protection
  • Suitable for isolation when installed in accordance with the applicable electrical requirements
  • Accessory options may include auxiliary contacts, shunt trip, undervoltage release, motor operator and rotary handles
Professional Installation Requirements
  • Installation, testing and commissioning must be carried out by a licensed electrical contractor in accordance with the manufacturer's instructions, AS/NZS 3000 and applicable switchboard requirements. Confirm prospective fault current, discrimination, cable sizing, clearances and required Australian approvals before installation.
Applications
  • Main switchboard incoming protection
  • Distribution board mains protection
  • Sub-main circuit protection
  • Commercial and industrial three-phase electrical distribution
  • Overload and short-circuit protection for large feeders and equipment
Standards & Compliance
  • IEC 60947-2 product design standard for low-voltage circuit-breakers
  • AS/NZS IEC 60947.2 is the applicable Australian adoption for moulded case circuit-breakers; verify product approval and RCM requirements for the intended installation
  • Installation should comply with AS/NZS 3000 Wiring Rules and relevant switchboard requirements
Environmental Benefits
  • Helps prevent equipment damage from overloads and short circuits, reducing premature replacement and electrical waste
  • Long mechanical service life can reduce replacement frequency
  • Metal and thermoplastic components 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 sold through authorised channels, subject to the applicable sales contract and warranty conditions.

Available Now

Available through authorised CHINT distributors in Australia.

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