, the introduction
XW-EKL5.1 measuring type cable network fault indicator is used in 35kV and below (including) neutral point ungrounded or via the cable (or buried) line arc suppression coil grounding, detection phase cable line short circuit and ground fault and by indicator flash on local and remote fault alarm indication. The whole set of indicators consists of three phase fault indicators, a zero sequence fault device and a panel indicator. XW-EKL5.1 has two remote measurement data transmission function, and has a sequence of cable temperature acquisition and local display function, with the remote communication unit, two remote remote measurement and fault alarm information transmission, cable temperature measurement information transmission, combined with the master cable fault fast positioning and cable temperature monitoring can be realized.  
the new generation of temperature measurement cable network two remote fault indicator set Xu Wang Electric Power Technology Co., Ltd. for many years in the field of power automation research and development, production experience. The advanced low power plastic optical fiber communication technology, soft magnetic material technology and low power consumption technology are adopted to meet the development of the smart distribution network technology, and the whole life cycle management of the traditional fault indicator is solved.
二、产品工作原理及功能特点   %d%a
2.1 短路故障判据
l 线路带电并持续30秒钟以上：负荷电流≥10A ；
l %d%a过流保护定值启动：0～700A/0～9.99S（出厂默认500A）；
l 电流突变≥200A（出厂默认值）；
l %d%a在一定时间内线路停电：负荷电流≤5A ；
2.2 接地故障判据
l 零序电流大于20A（定值可设）；
2.3 遥测及参数
l %d%a遥测范围最大700A；
l 遥测上报间隔可设（出厂默认1分钟）；
2.4 温度和电流测量及显示功能
l %d%a温度测量范围：-40～+85℃；电流测量范围：10-800A;
l 温度测量精度：±1℃；电流测量精度：误差≤10%
l %d%a面板显示功能：按下前面板“Reset/Test”按钮4秒钟后，数码管依次显示当前温度值和电流值；TA代表A相温度、TB代表B相温度、TC代表C相温度、TN代表零序连接；IA代表A相电流、IA代表A相电流、IB代表B相电流，IC代 Table C phase current value and IN value of zero sequence current. %d%a
2.5 fault alarm and fault prevention function
l fault criterion: the flow process of the fast break, over current detection method or adaptive load current. To ensure the consistency of action and export
l%d%a substation; anti misoperation prevention: no-load closing, large current fluctuations, instantaneous fault, surge flow misoperation;
l%d%a fault indicator with local alarm indication function, four LED lights in case of fault, fault indication flashes, normally extinguished;
2.6 automatic return
l%d%a panel indicator long press "Reset/Test" button for 2 seconds to clear the alarm status;
l factory default: 8 hours (1 minutes to 48 hours with
l%d%a); no alarm state, long press "Reset/Test" button for 2 seconds, L3 light, other indicators are flashing at the same time interval 5S 3 exhibit of lanterns the first time, alarm relay closed and disconnect, in order to determine whether the host normal work and the battery is normal.
l%d%a fault indicator (sensor) resetting method: unscrew the fault indicator regained nut, see light seconds can be reset; after reset, tighten the nut to prevent the emergence of the phenomenon of exposure. Flashing alarm
2.7 alarm function
l%d%a local panel LED instructions corresponding L1/L2/L3/ to ground indicate phase short circuit fault and ground fault;
l%d%a any phase short circuit and grounding, alarm relay output closed, reset time or press button Reset/Test disconnect. %d%a
l sensor with alarm display function, after the failure of the need to manually open the complex port, the light can be seen in 1 second after the re regulation.
2.8 communication function
l%d%a fault indicator panel indicator with communication function, real-time upload, line current temperature, fault information;
l%d%a and DTU support panel fault indicator or communication terminal through RS-584 communication, can support up to 16 (interval); panel
l%d%a site after the construction, can check reliability of optical fiber communication
; three,
l 1 technical parameters: 2 line voltage is less than or equal to 35kV
l load current: 0 ~ 700A
l 3%d%a maximum grounding impedance: 500 ohm
l 4 maximum short-circuit current: 25kA/
l 5 environment temperature: -40 to 70 DEG C
l 6 times more than 5000 times the
l action:%d%a7. protection grade: IP65