Navigator LM
The Navigator fault passage indicator is an electronic device that is designed for medium voltage utility overhead lines.
The indicator is provided with a self-adjusting load-dependent control of the trip current level. This function allows the indicator to continuously sample the load current on overhead lines and automatically set a corresponding trip value for fault detection as a function of the load current. The maximum load current sampled by the indicator is kept in memory for a period of at least 72 hours. Thus, the indicator is most favorably adapted to the network to be monitored, even if a low load is currently present.
The indicator is provided with a self-adjusting load-dependent control of the trip current level. This function allows the indicator to continuously sample the load current on overhead lines and automatically set a corresponding trip value for fault detection as a function of the load current. The maximum load current sampled by the indicator is kept in memory for a period of at least 72 hours. Thus, the indicator is most favorably adapted to the network to be monitored, even if a low load is currently present.
Fault detection; momentary versus permanent
LED indication with 360 degrees of visibility
Double-flashing mode upon detection of a second fault
Battery status indication
Reset depending on type: manual, current restoration, timed, on restoration of voltage
Mounting can be performed while the overhead line is energised
NAVIGATOR-LM HV: permissible voltage ≤161 kV
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