RCBO Residual Current Circuit Breaker

The PL47LE80 series is available in 2P single-phase and 3P+N three-phase four-wire configurations, covering residential, commercial, and light industrial AC distribution applications. With rated current options up to 63A, 6kA breaking capacity, and 30mA residual current sensitivity, the RCBO provides coordinated protection for electrical circuits against leakage faults, overload conditions, and short circuit failures.

Manufactured according to GB/T16917.1 and GB/T16917.22 standards, the series is designed for modern low-voltage distribution systems requiring compact installation, reliable protection, and simplified maintenance.

Product Specifications

Features

Integrated Protection Structure

The PL47LE80 combines residual current protection, thermal overload protection, and electromagnetic short circuit protection within a single device. The integrated design eliminates the need for separate installation of an MCB and RCCB, helping reduce wiring complexity and saving valuable space inside distribution panels.

When earth leakage occurs, the residual current detection mechanism activates the trip function. Under continuous overcurrent conditions, the thermal release disconnects the circuit to prevent cable overheating. During short circuit faults, the electromagnetic release responds rapidly to interrupt abnormal current and protect downstream electrical equipment.

Flexible Configuration for Different Distribution Systems

The PL47LE80 RCBO Residual Current Circuit Breaker supports both single-phase and three-phase applications.

The 2P configuration is designed for single-phase AC distribution systems, where it is commonly applied to household circuits, water heater circuits, air conditioning circuits, and commercial electrical loads requiring combined leakage and overcurrent protection.

The 3P+N configuration is developed for three-phase four-wire systems. It provides coordinated protection for three-phase equipment and mixed single-phase loads commonly found in commercial buildings, workshops, and small industrial facilities.

Sensitive Residual Current Protection

The RCBO uses a 30mA residual current protection configuration for circuits where protection against electric shock caused by insulation failure or earth leakage faults is required.

When abnormal residual current exceeds the preset operating value, the device disconnects the circuit quickly to reduce electrical safety risks. The integrated leakage protection function also helps simplify system design compared with installing independent residual current protection devices.

Suitable Trip Characteristics for Different Loads

The PL47LE80 series supports B, C, and D trip curves to match different electrical load characteristics.

B curve versions are suitable for circuits with relatively low startup current, such as lighting systems, precision instruments, and electronic equipment where stable operation is required.

C curve versions are designed for general residential and commercial loads, providing a balance between normal operating current and equipment startup surge tolerance. This curve is widely used for household appliances, office equipment, and conventional power circuits.

D curve versions are intended for applications with higher startup current, including motors, transformers, and inductive equipment. The higher magnetic trip threshold helps prevent unnecessary tripping during equipment startup.

Compact DIN Rail Installation Design

The modular housing structure allows direct mounting on standard 35mm DIN rails commonly used in residential and industrial distribution boxes.

The compact design reduces the installation space required inside electrical panels while maintaining convenient wiring and replacement. A built-in test button allows users to periodically check whether the residual current protection function operates correctly.

Stable Short Circuit Interruption Performance

The RCBO Residual Current Circuit Breaker provides a 6kA short circuit breaking capacity suitable for residential, commercial, and light industrial distribution applications.

The internal arc extinguishing structure helps control fault energy during short circuit interruption, while reinforced conductive components maintain stable electrical performance during repeated switching operations.

Working Principle

Residual Current Detection

The RCBO continuously monitors the current balance between conductors. When insulation damage or an earth leakage fault causes an abnormal current difference, the internal detection mechanism identifies the residual current and activates the trip system to disconnect the circuit.

Thermal Overload Protection

When the operating current exceeds the rated value for an extended period, the internal thermal release gradually responds to the temperature increase caused by overcurrent. The circuit is disconnected before prolonged overload damages cables or connected equipment.

Magnetic Short Circuit Protection

During a short circuit event, the sudden increase in current generates a strong magnetic force inside the electromagnetic release mechanism. The contacts separate rapidly to interrupt the fault current and reduce the impact on the electrical system.

Applications

Residential Distribution Protection

The PL47LE80 2P RCBO Residual Current Circuit Breaker is suitable for household distribution boxes where both leakage protection and overcurrent protection are required in individual circuits.

It can be applied to circuits including water heaters, air conditioning equipment, household sockets, and other high-power electrical appliances. The integrated protection design helps simplify household electrical safety configurations.

Commercial Electrical Distribution

In commercial buildings, offices, and retail facilities, the RCBO provides compact protection for lighting systems, office equipment, and general power circuits.

Compared with separate MCB and RCCB installation, the integrated structure reduces panel occupancy and simplifies electrical cabinet design.

Three Phase Equipment Protection

The 3P+N version is suitable for three-phase four-wire AC distribution systems used in small industrial and commercial environments.

It can be installed for applications involving three-phase motors, workshop equipment, pumps, and mixed three-phase and single-phase loads where coordinated leakage and overcurrent protection is required.

Difference Between RCBO MCB and RCCB

Factory Capability

Zhejiang Pugao Electric Power was established in 2011 and operates a 5,000㎡ manufacturing facility in Yueqing, Zhejiang.

The factory integrates component processing, assembly, electrical testing, and quality inspection within its own production system. For PL47LE80 RCBO production, inspection procedures include residual current trip testing, overload performance verification, short circuit protection testing, and temperature rise evaluation.

With ISO9001 quality management system certification and intellectual property management system certification, PUGAO maintains production traceability throughout the manufacturing process, from component preparation to finished product inspection.

The factory supports OEM production, customized packaging, sample evaluation, and bulk export supply for overseas electrical brands and distributors.

OEM Customization

PUGAO provides customized production services for customers developing private-label RCBO product lines.

The customization service covers brand logo marking, export packaging design, rated current configuration, residual current sensitivity selection, and technical documentation support.

Through flexible production arrangements, the PL47LE80 series can meet different market requirements for residential, commercial, and industrial electrical protection products.

Why Choose PL47LE80 RCBO

PL47LE80 RCBO Residual Current Circuit Breaker combines leakage protection and overcurrent protection in a compact DIN rail mounted device, providing a practical protection solution for modern AC distribution systems.

Its integrated structure reduces installation complexity compared with separate MCB and RCCB combinations, while supporting different pole configurations and trip characteristics for various electrical applications.

With in-house manufacturing, quality inspection capability, and OEM support, PUGAO provides RCBO products suitable for global low-voltage distribution markets.