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The Live DCM432C 4 Pole DC MCB is a very high-capacity specialized multi-pole direct current miniature circuit breaker engineered to provide comprehensive protection for complex DC electrical circuits requiring simultaneous switching of multiple conductors at substantial power levels. Rated at 32 Amps with a C-curve tripping characteristic, this 4-pole breaker safeguards DC circuits in applications such as utility-scale industrial bipolar solar photovoltaic systems, massive DC distribution networks, and critical infrastructure telecommunications. It features a 6kA breaking capacity suitable for demanding DC installations. The C-curve characteristic (5-10x In) provides excellent protection for DC circuits while accommodating the characteristics of high-power DC sources. With its robust construction and precision thermo-magnetic release, the DCM432C ensures complete circuit isolation and equipment protection for complex utility-scale renewable energy and massive DC applications requiring multi-pole switching at very high current ratings.
Multi-Pole DC Protection: 4-pole configuration for complex DC systems requiring simultaneous switching of multiple conductors.
Specialized DC Protection: Engineered specifically for direct current applications, ensuring reliable arc extinction and protection in DC circuits.
4-Pole Switching: Simultaneously protects and switches multiple conductors, ensuring complete circuit isolation in bipolar or multi-conductor DC systems.
6kA DC Breaking Capacity: Reliable fault current interruption for demanding DC installations including utility-scale industrial bipolar solar PV and massive DC systems.
C-Curve Characteristic: Trips instantaneously at 5-10 times rated current (160A to 320A), specifically calibrated for DC circuits with moderate inrush characteristics.
Very High-Capacity 32A DC Protection: Ideal for utility-scale industrial bipolar solar PV strings, massive DC distribution networks, critical telecom infrastructure, and complex high-power DC applications.
Utility-Scale Focus: Perfect for utility-scale bipolar solar farms, positive/negative/earth switching, massive DC power distribution, and telecommunications hub networks.
Precision Thermo-Magnetic Release: Thermal bimetal strip for accurate overload protection and magnetic solenoid for instantaneous short-circuit response on all four poles.
Superior Arc Extinction: Specialized DC arc quenching technology ensures safe interruption of direct current without sustained arcing.
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 | DCM |
| Model Number | DCM432C |
| Device Type | DC Miniature Circuit Breaker (MCB) |
| Pole Configuration | 4 Pole (4P) |
| Current Rating (In) | 32 Amperes |
| Trip Curve Type | C Curve (5-10 × In) |
| Rated Voltage | DC (consult rating chart for bipolar configurations) |
| Rated Breaking Capacity | 6kA (6000 Amps) DC |
| 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 (DC applications) |
1. What are the primary utility-scale applications for the DCM432C 4-pole 32A DC MCB?
Utility-scale bipolar solar farms, massive DC power distribution centers, telecommunications hub infrastructure, data center main DC distribution, and heavy industrial DC control systems.
2. How does 32A 4-pole protection benefit utility-scale bipolar solar installations?
Ideal for protecting major utility-scale bipolar solar arrays, typically supporting systems up to approximately 800-900W per circuit, ensuring complete simultaneous disconnection of all poles for maximum system safety.
3. What is the advantage of 32A rating over 25A for 4-pole utility-scale DC applications?
Provides 28% additional capacity for the largest-scale systems, essential for major solar farms, expanded telecom infrastructure, or applications where 25A circuits would be at their absolute limits.
4. Why is 4-pole switching critical for utility-scale solar farms?
Utility-scale bipolar solar farms require absolute isolation during maintenance. 4-pole switching ensures all conductors including earth are disconnected, preventing dangerous potential differences across large arrays.
5. What cable size is recommended for 32A 4-pole DC utility-scale circuits?
6mm² copper conductor minimum per pole. 10mm² strongly recommended for longer runs to minimize voltage drop. All four conductors must be identical size and type for balanced protection.
