Fault Indicator

Aerial Multifunctional Fault Indicator (BHS-D3) is a device installed on 6-35KV electricity transmission and distribution line for indicating faulty current flow. This new style multifunctional fault indicator, can detect not only short circuit fault and earthing fault on the line, but also can, according to its judgement, select a way to alarm, either by turning card or by giving out light. If the fault happens in the nighttime, it will give an alarm by giving out light; If the fault happens in the daytime, it will give an alarm by turning card. When there is fault on the line, the line inspector can locate the fault section and find out the fault point quickly under the aid of red alarm of the indicator. This greatly improved the working efficiency, shortened the power cut time, improved effectively the reliability of power supply. The detecting method is novel, not only action is reliable and performance is stable, but also installation and removing are very easy and convenient.

Action Principle:
Earthing Detecting Principle: Sample first half wave of capacitance current at earthing moment and first half wave of voltage at earthing moment and compare their phase position, when sample capacitance current at earthing moment change suddenly and bigger than a certain value, and also it is same phase as first half wave of voltage at earthing moment, at the same time the voltage to the ground is lower, we can tell the line is grounding, or else it is not grounding.

Short Circuit Detecting Principle: According to short circuit phenomenon, at the moment of short circuit, the current change suddenly positively, protecting action power cut as action basis.

Performance Characteristic:
Fault Indicating: When it is working normally, the window display is white; In case there is fault of short circuit or earthing, the window display is red or shining.

On Line Operation: Installed directly on the aerial line, free of maintenance.
Good Applicability: Self judgement, turn card alarm in daytime and giving light alarm in nighttime, improved the efficiency.
Antijamming Ability: The signal is not affected by the line, excitation flow, high harmonic wave, current fluctuation, especially the cable distribution capacitance bypass.
Self Reset: After the action of card turn, the indicator will self reset according to the time setted.
Install and Remove with Electricity: It is very easy to install and remove with electricity and will not affect the line operating.

Technical Parameters:
-applicable voltage grade U≥ 6KV
-applicable lead current I≤ 1000A
-applicable lead diameter 25mm2≤ D≤ 400mm2
-action responding time 0.06S≤ T≤ 3S
-static power consumption ≤ 10μ W
-action reset time 6, 12, 24, 36 hours for choosing
-circumstance temperature -40--+75 degree celcius
-times of action ≥ 4000 times
-weight 420g