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Suitable for indoor use.
The Live CB332C Triple Pole MCB is a heavy-duty industrial-grade miniature circuit breaker designed to provide reliable protection for three-phase electrical circuits with substantial inductive loads. Rated at 32 Amps with a C-curve tripping characteristic, this 3-pole breaker safeguards all three phases (L1, L2, L3) on AC systems up to 400V at 50/60Hz frequency. It features a powerful 10kA breaking capacity, making it suitable for installations with higher prospective short-circuit currents. The C-curve characteristic (5-10x In) provides excellent protection for circuits with substantial inductive loads while accommodating the inrush currents typical of larger industrial pumps, compressors, and heavy machinery. With its robust construction and precision thermo-magnetic release, the CB332C ensures equipment protection and operational safety for demanding industrial applications requiring three-phase protection with substantial inductive load tolerance.
Triple Pole Protection: Simultaneously protects all three phases (L1, L2, L3) in three-phase systems, ensuring complete circuit isolation during fault conditions.
High 10kA Breaking Capacity: Powerful fault current interruption for installations with high prospective short-circuit currents up to 10,000 amps.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (160A to 320A), specifically calibrated for circuits with substantial inductive loads and inrush.
High-Capacity 32A Three-Phase Protection with Inductive Tolerance: Ideal for larger industrial pumps (up to 9kW), air compressors, HVAC chillers, conveyors, and heavy machinery.
Inductive Load Capability: Handles substantial inrush currents from large motor-driven equipment without nuisance tripping.
Industrial-Grade Protection: Suitable for heavy industrial applications requiring robust three-phase protection.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on all three poles.
Superior Electrical Isolation: 4000V impulse withstand rating and 500V insulation voltage for protection against voltage transients.
Extended Operational Life: 8,000 electrical operations for long-term reliability.
Professional Installation: Standard 35mm DIN-rail mounting with IP20 finger-safe terminals and 16mm² wiring capacity.
| Specification | Details |
|---|---|
| Brand | Live |
| Series | CB |
| Model Number | CB332C |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 3 Pole (3P) |
| Current Rating (In) | 32 Amperes |
| Trip Curve Type | C Curve (5-10 × In) |
| Operational Voltage | 230/400V AC |
| Rated Breaking Capacity | 10kA (10000 Amps) |
| Frequency Range | 50/60 Hertz |
| Insulation Rating (Ui) | 500 Volts |
| Impulse Withstand (Uimp) | 4000 Volts (1.2/50 µs) |
| Dielectric Test Voltage | 2kV for 60 seconds |
| Protection Mechanism | Thermo-magnetic (all poles) |
| Operating Temperature | -5°C to +40°C (daily average ≤35°C) |
| Calibration Reference | 30°C |
| Storage Temperature | -25°C to +70°C |
| Electrical Lifespan | 8,000 cycles |
| Protection Class | IP20 |
| Terminal Capacity | Up to 16 mm² |
| Mounting Type | DIN Rail (35mm) |
| Standards | BS IEC/EN 60898 |
1. What specific applications require a 32A C-Curve triple pole MCB?
Industrial pumps up to 9kW (12HP), large air compressors, HVAC chillers, conveyor systems, industrial refrigeration, machine tool main drives, and heavy industrial fans.
2. Can this 32A C-Curve breaker handle a 9kW three-phase industrial pump?
Yes, it's ideal for 9kW pumps. The C-Curve tolerates starting currents up to 280-320A while the 32A rating provides excellent running protection without nuisance tripping.
3. What is the power capacity of this 32A three-phase C-Curve breaker?
Maximum three-phase load: 22.17kW at 400V. For motor applications, suitable for motors up to 9kW depending on starting characteristics and duty cycle.
4. Why choose C-Curve over B-Curve for large industrial motor circuits?
C-Curve (5-10x In) handles starting currents up to 320A where B-Curve (3-5x In) would trip at 160A, making C-Curve essential for larger industrial motors with high locked-rotor currents.
5. What cable size is recommended for 32A three-phase industrial motor circuits?
6mm² copper conductor minimum per phase. 10mm² recommended for longer runs to minimize voltage drop during motor starting. All three phase conductors must be same size.
