Short-circuit indicator
Type FLA3.1

The short-circuit indicator type FLA3.1 is used in overhead line networks. The indicator can be mounted under live conditions with the help of an adapter and a hot stick. The FLA3.1 is completely self-sustained by the monitored network from a current flow of 20A upwards. The indication is done by six flashing LEDs for a clear nighttime visibility and three red display areas for a clear daytime visibility. The FLA3.1 can communicate with a remote control via a bidirectional wireless connection. In this way all settings of the indicator can be adjusted any time without removing the indicator from the powered line.

The FLA3.1 stands out due to the great flexibility of the adjustments that can be done. In addition to the basic settings of the indicator like trip current, response delay, reset time etc., the FLA3.1 can be adapted to auto-reclosers in the network. This makes an optimized fault indication possible and also allows the indication of different fault types. Permanent and temporary faults can distinguished and indicated separately. Due to the bidirectional connection between the remote control and short-circuit indicator, the service current of the monitored network can be read out any time.

The short-circuit indicator type FLA3.1 can be integrated into a SCADA system via the remote indication interfaces type RIS-FR and type RIS-FS.

Order Data
Type FLA3.1 | for overhead-lines 40.40.10
Remote control type HS | for indicators type FLA3.1 40.30.10
Mounting adapter | bayonet type 40.51.10
Mounting adapter | clamp type 40.51.11
Mounting adapter | universal spline type 40.51.12

Features and Benefits

Operation in overhead line networks
Easy and full configurability with a remote control
Bidirectional wireless connection to a remote control
Trip current:
– selectable between 40 and 1500 A in steps of 20A
– Automatic setting of the trip current depending on service current
Response delay selectable between 40 ms and 300 ms in steps of 20 ms
LED indication and red display area
Test function by remote control
Reset function:
– Manual by remote control
– Time: selectable from 30 min to 12 h in steps of 30 min
– Reset by recovering service current enabled/disabled
Power supply:
Lithium battery type A 3.6V
Capability of connecting to SCADA systems via remote indication interface type RIS-FR
Bidirectional communication to a remote control
Inrush current restraint of 2 seconds
Measuring of the service current by remote control
Detection and indication of
– Permanent fault
– Temporary faults
– Transient currents
Configuration regarding to auto-reclosers for optimized fault detection


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