The fault can be indicated by both flag and LED lamps.
The overhead type fault indicator can transfer the fault information wirelessly, and communicate with the sub transmitter by sending and receiving signals.
● Trip current self-adjustment.
The fault indicator can adjust the phase to phase and phase to earth trip current as per different load current, the minimum current surge should be 120A.
● Entirely sealed structure.
The fault indicator is sealed using epoxy resin, the whole structure can withstand aging effects for a long time, like high temperature, and high humidity. The outside shell is made of UV resistant material, it can sustain exposure to high ultraviolet environment for a long time.
● Eliminate misact phenomenon.
Eliminate the reverse feeding misact based on the difference in features of reverse feeding current and normal fault current.
● Convenient operation means.
The fault indicator can be installed to the overhead line or underground line directly by a hot-stick with tool.
● Advantage trip criteria.
The current surge ΔI and the fault current duration time Δt is accordance with the Time inverse curve.
● Long life batteries.
The industry battery is used for power supplying and battery monitoring. The battery life is 8 to 10 years.
● High earthing fault detection ratio.
The signal source will reject a current to the earthing fault circuit, it can increase the earthing fault detection ratio to 90%.