Nortroll's complete range of power distribution products gives customers a choice of building blocks which can be tailored to offer a complete smart grid solution.

Over the years, Nortroll has established a very strong brand. Our three recognised product lines are listed to the right.


Fault Passage Indicators to locate short circuit and earth faults.


Fault current indicators for the underground medium voltage distribution network (6-36kV).


A modular system with different building-blocks allowing the utilities to tailor-make a system.


Norwegian coming soon...


LineTroll 111K

LineTroll 111K is a cost effective pole mounted indicator for detection of PtG and PtP faults in 6-69kV overhead line networks.

The unit mounts 3-5m below the conductors and monitors all three phases. The indicator is powered by replaceable long-life lithium batteries which have a life
expectancy of 10-15 years. It provides a 360 degree visibility for indication both for transient faults and permanent faults.

LineTroll 111K can be used in the following line systems / configuration:

  • Single distribution systems


Programmable: By dipswitches
PtG Faults thresholds: 4-50A
PtP Faults Di/dt: 100% relative increase in ILoad
Reset: Manual, timer & automatic on return of voltage.
Fault Indication:
Permanent: Two Super-intensive LEDs with strobe effect
Transient: Red LED
Low Battery: Yellow LED
Mounting Live-line mounting with strap-bands or screws
Poles: Lattice Towers, concrete and wooden poles


Distribution network monitoring, control and automation


We have distributors in over 40 countries. Click the map for contact information.

Design & development: CATCH