Earth-fault indicator

Type EFL

The earth-fault indicator can be used in radial medium voltage networks with one input and open-ring networks. The network has to be solidly earthed or low resistance-earthed. The indication of the earth-fault is done by an LED indicator. The connection between the earth-fault sensor and the display unit is done by cable. The sensor must be mounted on screened cables. The sensor is divisible and can be retrofi tted on the cable. The display
device is powered by an exchangeable lithium battery.

The earth-fault indicator type EFL consists of:

– One display unit with cable for displaying the earth-fault
– One earth-fault sensor type SE (page 19) with terminal connection for detecting the earth-fault

The features differ between panel-mounted and surface-mounted units. The panel-mounted version has three trip currents, three resettimes and a contact for remote monitoring. The surface-mounted version has one trip current, one reset time and an optional contact for remote monitoring

Features and Benefits

Trip current for earth-fault between 10 and 300 A

One response delay between 40 and 300 ms

Button to test the function of the display unit

Reset function:
– Manual
– Time: between 1 and 16 h
– Optional: by recovering operating current

Power supply:
– panel mounted version: Lithium battery type AA 3.6V
– surface-mounted version: Lithium battery type ½ AA 3.6V

Surface-mounted (IP65) and panel-mounted housing

Contacts for remote monitoring

LED indication