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The Live CB332B Triple Pole MCB is a high-capacity miniature circuit breaker designed to provide reliable protection for high-power three-phase electrical circuits with resistive loads. Rated at 32 Amps with a B-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 B-curve characteristic (3-5x In) provides fast response to faults while accommodating the minimal inrush currents typical of high-power commercial and industrial resistive loads. With its robust construction and precision thermo-magnetic release, the CB332B ensures equipment protection and operational safety for demanding commercial and industrial applications requiring three-phase protection at higher current ratings.
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.
B-Curve Characteristic: Trips instantaneously at 3-5 times rated current (96A to 160A), specifically calibrated for high-power circuits with minimal inrush.
High-Capacity 32A Three-Phase Protection: Ideal for large commercial kitchen equipment, industrial heaters, main distribution boards, and high-power resistive loads.
Wide Application Range: Suitable for restaurants, hotels, industrial facilities, and commercial buildings requiring three-phase protection for resistive loads.
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 | CB332B |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 3 Pole (3P) |
| Current Rating (In) | 32 Amperes |
| Trip Curve Type | B Curve (3-5 × 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 triple pole MCB with B-Curve?
Large commercial kitchen suites, industrial water heating systems (up to 22kW), main distribution boards for retail spaces, high-power catering equipment, and large-scale resistive heating banks.
2. What is the power capacity of this 32A three-phase breaker?
Maximum resistive load: 22.17kW at 400V three-phase. Per phase capacity: 7.36kW at 230V. Suitable for large commercial equipment and main distribution applications.
3. Can this breaker be used for main distribution in a large restaurant?
Yes, it's ideal as a main distribution breaker for large restaurant kitchens, providing protection for multiple cooking appliances with fast B-Curve response for resistive heating elements.
4. Why choose 10kA breaking capacity for 32A commercial circuits?
Provides enhanced protection in installations with higher fault currents, such as near main distribution boards in commercial buildings where fault levels may exceed standard 6kA ratings.
5. What cable size is recommended for 32A three-phase circuits?
6mm² copper conductor minimum per phase. 10mm² recommended for longer runs or higher ambient temperatures. All three phase conductors must be same size. Terminals accept up to 16mm².
