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Current Location:Home >> Product List >> FI-JD-01,FI-JD-02,FI-JJD-01,FI-JJD-02
FI-JD-01,FI-JD-02,FI-JJD-01,FI-JJD-02

FI Series Overhead-type Short-circuit/Earth Fault Indicator is
a device mounted on overhead power line to indicate power
line fault. It can accurately locate the fault existing section,
which provides enormous convenience to find out the fault
point quickly and accurately, saving time for troubleshooting,
avoiding large area blackout and improving reliability of
power supply

1. Overhead-type Short-circuit Fault Indicator is a device for
detecting short circuit fault point of 6-35KV overhead power
line. The fault can be detected by determining current sudden
change when a short circuit fault occurs in the power line.
2. Earth fault detecting principle is that record the sample of
the first half-wave of capacity current and voltage at the
moment of grounding instant. Then compare their phase with
together. If the sampled sudden change current of capacity at
the grounding instant exceeds a certain value, of which wave
shape is the same as the half-wave of capacity voltage at the
grounding instant, and the wire-to-ground voltage reduces at
the same time. It can be determined that an earth fault
occurred in the power line.

Product Name Short Circuit Fault Short Circuit Fault Earth Short Circuit Fault Earth Short Circuit Fault
Indicator (Flag) Indicator (Light) Indicator (Flag) Indicator (Light)
Corresponding Model FI-JD-01 FI-JD-02 FI-JJD-01 FI-JJD-02
Detectable Fault Type Permanent, Instant Short-circuit Fault, Metallic, Non-metallic Earth Fault
Applicable Voltage 6-35KV 6-35KV 6-35KV 6-35KV
Applicable Load Current 0-1000A 0-1000A 0-1000A 0-1000A
Usage Overhead Power Line
Applicable Wire Cross-section Area 25-500mm 2 25-500mm 2 25-500mm 2 25-500mm 2
Standard Reset Time 12, 24 hours 12, 24 hours 12, 24 hours 12, 24 hours
Action Times 3000 3000 3000 3000
Ambient Temperature -40 ℃ - +65 ℃ -40 ℃ - +65 ℃ -40 ℃ - +65 ℃ -40 ℃ - +65 ℃

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