RCBO Circuit Breaker 100A 3P+N Combined Protection Design Three Phase Four Wire Residual Current

NXBLE125 3P+N RCBO Residual Current Operated Circuit Breaker Size 100A Overview A threepole plus neutral residual current operated circuit breaker designed for threephase fourwire installations. Combines overcurrent interruption and earth leakage detection in a single modular device to simplify wiring and protection in distribution panels. Key benefits Combined protection: Integrates residual current detection with circuit breaking to respond to earth leakage and overload or short circuit conditions without separate devices. Flexible selection: Available in 63A, 80A, 100A, and 125A ratings to match different load and distribution requirements. This listing is for the 100A size. Space efficient: Modular design fits standard distribution panels and reduces component count compared to using separate devices. Clear operation: Manual toggle for on/off control and visible trip indication help with straightforward operation and troubleshooting. Improved system safety and continuity: Detects leakage currents while also providing overcurrent interruption to help isolate faults quickly and reduce downtime. Function and performance Type: 3P+N RCBO residual current operated circuit breaker combining residual current device and miniature circuit breaker functions. Ratings: 63A, 80A, 100A, 125A available; this product is the 100A variant. Application: Designed for use on threephase fourwire electrical systems where both earth leakage detection and overcurrent protection are required. Operation: Interrupts supply on detection of specified earth leakage or overcurrent conditions to isolate faulty circuits. Compatibility and installation Compatibility: Suited for threephase fourwire distribution boards, branch circuits and subdistribution panels requiring 3P+N protection. Mounting: Modular design for standard electrical panel installation. Fits typical DINrail systems used in commercial and industrial panels. Size and wiring: 100A nominal current rating for this unit; use conductor sizes and protective measures appropriate for the selected rating and local wiring regulations. Materials and build Enclosure: Insulating housing and modular assembly designed for panel mounting and electrical isolation of live parts. Terminals: Accessible connection points for line and load conductors and neutral; designed for standard power cabling consistent with the chosen current rating. Use scenarios Commercial office building distribution: Protects multiple branch circuits from earth leakage and overcurrent while simplifying panel layout by combining functions in a single device. Light industrial or workshop mains supply: Provides 100A main or feeder protection in threephase panels where both overload and leakage detection are required for equipment and personnel protection. Subdistribution boards for HVAC or motor circuits: Ideal for protecting dedicated subpanels that serve motors, HVAC units, or groups of loads that require combined earth leakage and overcurrent protection. What to consider when ordering Select the appropriate rating for your load and conductor sizing. This listing specifies the 100A variant; other ratings are available for different load demands. Confirm system type as threephase fourwire to ensure correct compatibility with a 3P+N RCBO. Installation and wiring should follow local electrical codes and be performed by a qualified electrician. Models and variants Product family includes NXBLE125 models in the following nominal current ratings: 63A, 80A, 100A, 125A. Confirm the required rating when selecting the unit. This NXBLE125 3P+N RCBO in 100A size provides a compact, combined solution for earth leakage detection and overcurrent protection in threephase fourwire installations.