Profile: FDB Electrical Ltd specializes in earth leakage and earth monitoring products and services. The EFR-1 is designed for the specialist panel builder and is ideal for general purpose, low current applications. It is housed in a single module din rail housing complete with integral test button & screw clamp terminals to simplify connection. It is available with a choice of pre-set current & time trip levels from 20mA to 500mA, instantaneous, 60Ms, 300mS. It can be connected to operate a shunt trip, UVR, or contractor coil. Flying leads for remote test facility are also available. It is supplied for operation at frequencies 50/60 Hz and available to order at 300/400 Hz. We offer a range of single phase earth leakage protection units suitable for 240V (or 100v) supplies.