BATTERYLESS EFIs
EARTH FAULT INDICATORS
The Bowdens range of Batteryless EFIs is unique, as much as there is absolutely NO battery within the unit. The power required to flip the flag is derived from the particular double-wound split core CT, which charges a special low leakage capacitor to maintain the trip condition for three hours. The Batteryless EFI is therefore completely maintenance-free.
Features:
BATTERYLESS EFI – NB Standard
- No Battery – powered entirely from the fault energy generated in the CT
- Trip current Nominal 50 Amps
- Timed reset three hours max
- Push button test and reset
- Cast resin CT compatible
BATTERYLESS EFI – NB Advanced
- As NB Standard but with following features
- Alarm relay output (changeover Volts free contacts)
- LV Reset from 240V 50 Hz supply or Remote reset from RTU