Position

     Fault indicator of power line is an intelligent device installed on overhead line, power cable, cabinet transformer, ring main unit, switch cabinet of power distribution room and cable branch cabinet to detect online and indicate short circuit and single-phase ground fault. When there is short circuit or ground fault, the line tracing personnel may rapidly confirm the faulty line section and find out fault points by means of alarm display of the fault indicator. The fault indicator with communication may realize remote transmission of fault signals, may combine the communication terminal equipment and background monitor to constitute an automatic positioning system so as to rapidly and accurately position and get rid of the faulty section, by which it shorts the power failure time and significantly improves the reliability of power supply system.

 Technical parameter

1)  Applicable voltage grade                   6~35KV

2)  Applicable range of load current              0~600A

3)  The minimum load current of line              insulated wire 5A; bare conductor 0A

4)  Power on condition of the line                     Current ≥5A or voltage ≥3kV (more than 30 seconds)

5)  Applicable conductor diameter                    8~41mm (bare conductor or insulated wire)

6)  Short circuit current alarm                          ≥100A  (configurable, the default value is 160A); the accuracy is ±10%; short circuit delay (60mS~4S).

7)  Ground transient current                             ≥5A (configurable, the default value is 10A); the accuracy is ±5%; duration (40mS~4S).

8)  Automatic reset time                                   4h~24h (configurable, the default value is 24h)

9)  Withstand current of short-circuit sensor            40KA/4S

10)  Power supply                                                           ER14505 lithium battery, 3.6V 2.4Ah (the valid period is not less than 8 years)

11)  Static power consumption                                         ≤5μA

12)  Protective grade of fault indicator                             IP65

13)  Applicable temperature range                                   -40℃~+70℃

14)  Light flashing interval                                                  5S

15)  Continuous light flashing time                                       no less than 2000 h

16)  Action times                                                                    no less than 3000 times

17)  Measurement precision of load current                        ±3% (load current>20A) or ±1A (5A≤load current≤20A)

18)  Measurement precision of circuit to ground                ±5% (2KV~7KV)

19)  Temperature measurement precision                           ±2℃ (-45℃~+200℃)

20)  Communication distance                                                no larger than 300m