The 4P RCBO ZMB7LE-63 RCBO Integrated Residual Current Circuit Breaker with Overcurrent ProtectionIntegrated residual current circuit breakers (RCBOs), through multi-functional integration and rapid response, have become core components ensuring safety in modern electrical systems, especially suitable for scenarios with high requirements for reliability and installation efficiency.
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Functional Integration, Space Saving
Integrating residual current protection, overload protection, and short-circuit protection into a single device eliminates the need for separate residual current devices (RCDs) and circuit breakers (CBs). This simplifies the circuit structure and is suitable for space-constrained scenarios (e.g., home distribution boxes, small control cabinets).
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Coordinated Operation, More Reliable Protection
In traditional solutions, RCDs and circuit breakers require separate debugging, which may cause differences in action timing. The integrated design ensures simultaneous response to residual current, overload, and short-circuit protection, improving fault handling efficiency.
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Simplified Installation and Maintenance
A single device reduces wiring nodes, minimizing installation complexity and the risk of poor contact. In case of a fault, only the single device needs to be replaced or repaired, making maintenance more convenient.
In the electrical field, regarding the number of poles for RCBO wiring (corresponding to different combinations of live wire L, neutral wire N, and protective earth wire PE):
A 4P RCBO is connected to three-phase live wires (L1, L2, L3) + neutral wire (N), with four-pole linked tripping. When tripping occurs, it cuts off the three-phase live wires and the neutral wire simultaneously. It is suitable for three-phase four-wire circuits and can prevent the impact of neutral wire faults (such as neutral wire breakage, overvoltage) on equipment.
