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MCCB 3P 250A 50kA Thermal Magnetic 250A Frame NM8N Chint

BRAND: CABAC
SKU: 271176
$614.10 List price: $818.80
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Chint NM8N 250A 3P MCCB features 50kA breaking capacity, thermal-magnetic trip unit and a 250A frame. Ideal for switchboard mains and sub-mains protection.

Alternatively Known As: CHINT NM8N-250S TM 250 3P MCCB, moulded case circuit breaker, 250A 3-phase circuit breaker

Technical Specifications
  • Frame Size: 250A
  • Rated Current: 250A
  • Number of Poles: 3P
  • Trip Unit: Adjustable thermal-magnetic
  • Breaking Capacity: 50kA Icu and Ics at 380/400/415V AC
  • Breaking Capacity at 500V AC: 40kA
  • Breaking Capacity at 660/690V AC: 8kA
  • Rated Operational Voltage: 380/400/415V, 440V, 500V, 660/690V AC
  • Rated Insulation Voltage: 1000V AC
  • Rated Impulse Withstand Voltage: 8kV
  • Thermal Adjustment Range: 0.7–1.0 x In, equivalent to 175–250A
  • Magnetic Adjustment Range: 5–10 x In for 180–250A power-distribution ratings
  • Rated Frequency: 50/60Hz
  • Mechanical Durability: 15,000 operations
  • Electrical Durability: 1,500 operations
  • Dimensions (H x L x W): 200mm x 120mm x 106mm
  • Weight: 1.75 kg
Key Features
  • Three-pole moulded case circuit breaker for low-voltage AC distribution
  • Adjustable thermal protection for overload conditions
  • Adjustable magnetic protection for short-circuit conditions
  • 250A frame with 250A rated current
  • 50kA short-circuit breaking capacity at common 400/415V system voltages
  • Suitable for switchboard mains and sub-mains protection
  • Compatible with optional auxiliary, shunt-trip, undervoltage and operating-mechanism accessories
Professional Installation Requirements
  • Installation, testing and commissioning must be performed by a licensed electrician in accordance with applicable wiring rules, switchboard requirements and the manufacturer's instructions. Confirm fault levels, discrimination, cable capacity and local RCM requirements before energising.
Applications
  • Switchboard main incomer protection
  • Sub-main circuit protection
  • Commercial and industrial power distribution
  • Protection of feeders and distribution boards
  • Overload and short-circuit protection for three-phase AC circuits
Standards & Compliance
  • AS/NZS IEC 60947.2: applicable standard for low-voltage circuit-breakers and MCCBs
  • IEC/EN 60947-2 product standard reference
Environmental Benefits
  • Long mechanical and electrical service life can reduce replacement frequency and product waste
  • Metallic conductive components and moulded enclosure materials can be separated for recycling at end of service life
  • Thermal-magnetic operation requires no electronic trip-unit power supply during normal protection operation
Warranty Information

CHINT warranty policy provides 27 months from the date of manufacture for other low-voltage apparatus sold through authorised channels, unless the customer contract specifies different terms. Warranty is subject to the manufacturer's conditions.

Available Now

Available through authorised CHINT distributors in Australia.

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