Trade Discount 25%
MCCB 4P 400A 36kA Thermal Magnetic 400A Frame NM8N Chint
Chint NM8N 400A 4P MCCB features 36kA breaking capacity, thermal-magnetic trip unit with protected neutral and a 400A frame. Ideal for switchboard mains protection.
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Alternatively Known As: CHINT NM8N-400C-400/4/23 MCCB, 400A moulded case circuit breaker, 4P thermal-magnetic circuit breaker
Technical Specifications
- Product Series: NM8N
- Frame Size: 400A
- Rated Current: 400A
- Number of Poles: 4P
- Trip Unit: Thermal-magnetic, distribution protection
- Neutral Protection: Protected neutral pole, 4C configuration
- Rated Ultimate Short-Circuit Breaking Capacity Icu: 36kA at 380/400/415V AC
- Rated Service Short-Circuit Breaking Capacity Ics: 36kA at 380/400/415V AC
- Rated Operational Voltage: Up to 690V AC, 50/60Hz
- Rated Insulation Voltage Ui: 1000V
- Rated Impulse Withstand Voltage Uimp: 8kV
- Thermal Trip Adjustment: 0.7–1.0 x In
- Magnetic Trip Adjustment: 5–10 x In for distribution protection
- Utilisation Category: A
- Mounting: Fixed, front connection
- Terminal Torque: Suitable for M10 terminals; verify final torque against installation instructions
- Mechanical Life: Up to 25,000 operating cycles
- Electrical Life: Up to 10,000 operating cycles at 415V AC and rated current
- Dimensions (H x L x W): 157mm x 88.7mm x 140mm
- Weight: 2.5 kg
Key Features
- 400A frame with 400A rated current
- Four-pole construction for three-phase and neutral switching
- Protected neutral pole for overcurrent protection of the neutral conductor
- Thermal-magnetic release for overload and short-circuit protection
- 36kA short-circuit breaking capacity at common low-voltage distribution voltages
- Adjustable thermal and magnetic trip settings
- Suitable for switchboard mains, feeders and industrial distribution applications
- Fixed front-connection design
- Suitable for isolation when installed and selected in accordance with the applicable electrical design requirements
Professional Installation Requirements
- Installation, adjustment and commissioning must be performed by a licensed electrician or suitably qualified electrical contractor. Select, mount and test the MCCB in accordance with the manufacturer's instructions, AS/NZS 3000, AS/NZS IEC 60947.2 and the switchboard assembly requirements. Confirm fault level, conductor sizing, neutral protection settings, clearances and terminal torque before energisation.
Applications
- Main switchboard protection
- Commercial and industrial low-voltage distribution boards
- Three-phase feeder protection with switched neutral
- Power centre and electrical switchboard incomers
- Motor control centre distribution protection where thermal-magnetic distribution protection is suitable
- Protection of cables and electrical equipment against overload and short circuit
Standards & Compliance
- Applicable product standard: AS/NZS IEC 60947.2:2015 for low-voltage circuit-breakers
- Manufacturer product family is type-tested to IEC/EN 60947-2; confirm Australian regulatory marking and installation approval for the specific supplied unit
- Installation should comply with AS/NZS 3000 and the relevant switchboard assembly requirements
Environmental Benefits
- Long operating life can reduce replacement frequency and associated product waste
- Provides fault protection that can help prevent damage to downstream electrical equipment and extend asset life
- Metal terminals and conductors can generally be recovered through appropriate electrical equipment recycling streams
- Supports reliable, properly protected electrical distribution systems, reducing the likelihood of fault-related equipment loss
Warranty Information
CHINT warranty policy provides 27 months from the date of manufacture for other low-voltage apparatus when purchased through authorised sales channels, subject to the applicable sales agreement and warranty conditions.
Available Now
Available through authorised CHINT distributors in Australia.
