RCDs with Overcurrent Protection (RCBOs)

Techna offer a wide range of 6kA , 10kA and Mini Residual Current Circuit Breakers with Overcurrent Protection (RCBOs), available in 2 or 4 pole, in current ratings from 6A to 40A, with residual current sensitivity from 10mA to 500mA and with inbuilt test buttons. Low voltage (LV) versions are also available, which have been designed to be used on 110V systems.

Our range of RCBOs are suitable for mounting on DIN-Rail and can be used inside our Dtec Distribution Boxes and WINtec IP67 Protection Windows.

What is a Residual Current Circuit Breaker with Overcurrent Protection (RCBO)?

A Residual Current Circuit Breaker with Overcurrent Protection (RCBO) offers the functionality of both a Miniature Circuit Breaker (MCB) and a Residual Current Circuit Breaker (RCCB) in a single device, therefore combining residual current or earth leakage (ground fault) protection with overcurrent and short circuit protection.

RCBOs are used for circuit protection on a wide range of applications in commercial or industrial sites to disconnect the incoming power from connected electrical devices in the event of a fault. Using RCBOs to replace an RCCB and MCB combination offer a key advantage in that by using individual RCBOs on each circuit only a single circuit will be turned off if a residual current or earth leak is detected.

The residual current sensitivity is the key parameter when specifying an RCBO and defines the fault level you want the RCBO to detect and protect against. Our RCBOs are available in 10mA, 30mA, 100mA, 300mA and 500mA.

As RCBOs include overcurrent and short circuit protection, an appropriate current rating must also be chosen, as you would with MCBs. Our 6kA and 10kA RCBOs are available in current ratings from 6A to 40A.

We offer different versions of RCBO, from the most commonly used 2 pole (live and neutral) to 4 pole (three phase and neutral). We also supply Mini 6kA RCBOs, which have 2 poles (live and neutral) in a single module width device.