Circuit Protection Review 
The Type B earth leakage relay is an essential part for earth fault protection equipment on an installation where several switch mode power supplies are fed from the AC supply.
BS EN 60898-1:2019
Electrical accessories.
Circuit-breakers for overcurrent protection for household and similar installations.
Circuit-breakers for a.c. operation
Publication Date: 01 February 2019
Replaces: BS EN 60898-1:2003+A13:2012
To help designers and installers comply with the 18th Edition IET Wiring Regulations Crabtree has launched a range of AFDDs (Arc Fault Detection Devices) that fit into any new or existing installation with a Starbreaker consumer unit.