Fault indicators

The Fault Passage Indicators are used to locate short-circuit (PtP) and earth faults (PtG) in MV overhead or underground line distribution networks. The indicators will fully cover the different fault configurations that may occur. The indicators are placed at strategic locations along the line, eg. after branching points and sectionalizers. Live line installation makes installation safe, easy and fast. Nortroll's fault indicators provide fast fault localisation enabling reduction in outage times. This represents enhanced service to the customers thereby improving the utilities image and significant reduction in the cost related to faults and outages. Another important aspect of using fault indicators is that unnecessary operations of circuitbreakers and sectionalizers to locate faults are avoided. This way the indicators help reduce wear and tear as reclosing cycles causes stress to the switchgear. General fault detection principle: All indicators installed between the feeding substation and the fault will operate when a fault occurs. The indicators placed behind the fault, will remain idle. Upon detecting a fault on the line, the indicator gives off an intermittent LED and/or Xenon type flashing and also remotely by GSM network for some Nortroll products.