Programmable short-circuit and earth fault indicators – Linetroll 3100

SKU: Linetroll 3100

Code: Linetroll 3100

Linetroll 3100 is used to locate short-circuit and earth faults in overhead line distribution networks.
Linetroll 3100 is a 3-phase unit fully covering the different fault configurations that may occur.
The indicators are placed at strategic locations along the line such as after branching points and sectionalisers. It is mounted on the pole, 3-5 meters below the conductors, by means of screws or wrapping-bands. Live line mounting is done safely, easily and rapidly.

Upon detecting a fault on the line, the indicator gives off an intermittent LED flashing. This flash can be seen within 200-300 meters distance. The lens of the indicator can be turned to either side for optimal visibility.

LineTroll 3100 can be (optional) equipped with a relay card, short-range radio or GSM communication module for remote indication. Interconnection with Nortroll’s Lon-Based MicroScada.
Hardware relay interface/software protocol converter (IEC-870 or RP-570) is available for integration to a third-party.

Parameter name


Nominal operating voltage (kV)

6 – 66

Maximum sensitivity for magnetic field (B) Di/Dt

2,5; 4; 7; 15 or 50 A for fault period > 60 ms

Power supply

Two lithium batteries: 3,6 V; 16,5 Ah

Dimensions (mm)

100 x 380 x 200

Operational and storage temperature range (0C)


Weigh (including batteries) (kg)