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...


Transmission Networks (50-132kV)

LineTroll 110Tμr is a line mounted indicator for detection of PtG and PtP faults in overhead line networks.

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 110Tμr can be used in the following line systems / configuration:

  • Single distribution systems
  • Distribution systems with earth-wire
  • Multiple distribution systems

Sub Transmission lines: 66-132KV
Programmable: Dipswitches
Threshold level: 500 or 1000A
Trip level Di/Dt: 500 or 1000A
Reset: Manual, timer & automatic by return of voltage or current
Fault Indication:
Permanent: Super-intensive Red LED with strobe effect
Transient: Green LED
Low Battery: Yellow LED
Mounting: Live-line mounting with hotstick


Distribution network monitoring, control and automation


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

Design & development: CATCH