Frequently asked questions

FA156793

17 August 2022

Issue:
Site issues with Earth leakage and RCD's tripping

Product Line:
Smart-UPS

Environment:
All models, All Serial Numbers

Cause:
One of the most common site issues with UPS systems is the tripping of the earth leakage circuit breakers ELCB / RCD. To examine this in greater detail, we need to look at this device: The most common RCD has a tripping current of 30mA but they are also available in other versions form 10mA - 1,000mA (1A). Selective versions, with a delayed reaction time are also available

Resolution:
The attached document looks at this issue in greater detail.