3 Module 4 Pole RCBO – Compact, Switched Neutral Protection for 3 Phase Installations
Proteus Switchgear’s award winning, innovative 3 module 4 pole RCBO was launched in 2023, designed specifically for compatibility with our existing busbar system. This compact device combines functionality, safety, and convenience. Delivering full four pole switching in a space saving design that occupies just one triple pole space within a standard three phase Proteus distribution board.
The 4 pole RCBO switches all conductors – L1, L2, L3, and neutral, providing true switched neutral protection. This makes it ideal for commercial and industrial applications where neutral disconnection is critical for safety and maintenance, such as in data centres, manufacturing facilities, and the renewables market. For installations requiring enhanced protection and compliance with modern standards, the RCBO is available in 30mA, 100mA, and 300mA trip sensitivities and meets BS EN 61009-1 and BS EN 61009-2-2.
With a 10kA short circuit rating and Type A tripping characteristics, it offers reliable protection against overloads, short circuits, and residual current faults, including pulsating DC components from modern electronic equipment. Both the RCBO and matching 4 pole MCBs are C curve devices, available in ratings from 6A to 63A.
The Proteus 3, module 4 pole RCBO is designed for ease of installation. The neutral connection is made via a flying lead that terminates to the board’s neutral block, and all load cables, including the neutral, connect directly to the device. It can be used on a three phase only load, with the supply side neutral connected to the neutral bar (for internal PCB supply).
By eliminating the need for separate enclosures and additional wiring between RCDs and MCBs, this innovative solution reduces installation time, board space, and overall cost. Making it a smarter choice for electricians seeking efficient, compliant, and neatly engineered three phase overload, short circuit and earth leakage protection.
For more information, contact our UK wide sales team for product details. For technical support, please reach out to our Midlands based manufacturing facility, where our experts are on hand to assist. Alternatively, the devices are available from stock nationwide through the CEF network and online.
