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The Live CZ180B Single Pole MCB is a high-capacity industrial-grade miniature circuit breaker designed to provide reliable protection for high-power single-phase electrical circuits with resistive loads. Rated at 80 Amps with a B-curve tripping characteristic, this 1-pole breaker safeguards the phase conductor on AC systems up to 230V at 50/60Hz frequency. It features a powerful 10kA breaking capacity, making it suitable for installations with higher prospective short-circuit currents near main distribution points. The B-curve characteristic (3-5x In) provides fast response to faults while accommodating the minimal inrush currents typical of high-power resistive loads. With its robust construction and precision thermo-magnetic release, the CZ180B ensures equipment protection and operational safety for demanding high-power applications requiring current ratings above the standard range with enhanced interrupting capacity.
High-Capacity Single Pole Protection: Protects one phase conductor for high-power single-phase 230V circuits up to 80A.
Enhanced 10kA Breaking Capacity: Powerful fault current interruption for installations with higher prospective short-circuit currents up to 10,000 amps.
B-Curve Characteristic: Trips instantaneously at 3-5 times rated current (240A to 400A), specifically calibrated for high-power circuits with minimal inrush.
High-Capacity 80A Protection with Fast Response: Ideal for main distribution feeders, large industrial heaters, commercial installations, and heavy-duty resistive loads.
Extended Current Range: Provides protection for applications requiring 80A capacity, beyond standard MCB ratings.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response.
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.
| Specification | Details |
|---|---|
| Brand | Live |
| Series | CZ |
| Model Number | CZ180B |
| Device Type | Miniature Circuit Breaker (MCB) |
| Pole Configuration | 1 Pole (1P) |
| Current Rating (In) | 80 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 |
| 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 | 25-35 mm² (suitable for 80A) |
| Mounting Type | DIN Rail (35mm) |
| Standards | BS IEC/EN 60898 |
1. What specific applications require an 80A single pole B-Curve MCB with 10kA breaking capacity?
Main distribution feeders for large commercial units, high-power industrial heaters (up to 18kW), main switches for large workshops, and installations near distribution boards where fault currents may be elevated.
2. What is the advantage of 10kA breaking capacity at 80A rating?
Provides enhanced protection in installations with higher fault currents, such as near main distribution boards or close to transformers, ensuring the breaker can safely interrupt maximum fault current without failure.
3. What is the power capacity of this 80A B-Curve breaker?
Maximum resistive load: 18.4kW at 230V. Continuous load (80% rule): 14.7kW. Ideal for high-power resistive loads requiring fast B-Curve response and enhanced fault protection.
4. Why choose B-Curve over C-Curve for 80A high-power resistive applications?
B-Curve (3-5x In) provides faster fault clearance (240-400A trip) than C-Curve (400-800A), offering better protection for resistive elements while responding to actual fault conditions more quickly.
5. What cable size is recommended for 80A circuits with 10kA protection?
16mm² copper conductor minimum. 25mm² strongly recommended for longer runs, higher ambient temperatures, and to ensure proper termination capacity. Never use smaller cable for 80A circuits.
