CableTroll 2700 - Fault Indicator System for 6-36KV Cable Networks Features 
Microcontroller based indicator. Programmable function in software. Separate indication of earth fault and short circuit faults. Indication of phase and type of fault. Outputs for remote signalling. Multiple power supply alternatives Multi reset function: Manually, programmable timer, remote and by return of voltage. Response time adaptable to relay protection.
System Description
The Cabletroll 2700 is a complete system for indication of earth-fault and short circuit faults in
an underground 6-36 kV cable network.
The system consist of three different modules:
An Earth Fault Element with a split core for sensing the imbalance during earth faults 2 (or 3) Short-Circuit sensors for detecting short-circuits Processing unit including the power supply and the indication unit with flashing LED's for local indication and relay contacts for remote signalling, controlled by a microcontroller.
Trip level for earth fault is continuously adjustable in the range from 5-240A . Short circuit trip level is adjustable in the range from 300 - 1000 A.
The system has separate indicators for earth fault and short-circuit faults.
Three LED's shows which phases are involved in the short circuit.
For remote signaling two pairs of relay contacts are available; earth fault and short circuit.
On request the indicator can be manufactured with two fibre optic outputs for remote signaling.
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