一、产品简介
EKL-4 短路接地故障指示器是配套安装在配电网络系统中的环网开关、电缆分支箱、箱变上，用于指示相应电缆区段的短路和单相接地故障的一种实时监测装置。线路发生故障，工作人员可借助指示器的报警指示，迅速确定故障区段，并找出故障点。同时，报警信息可实时发送到监控中心的服务器，在监控电脑的屏幕上显示出故障所在的区域和具体位置，引导巡线人员迅速确定故障区段并找出故障点。该指示器为解决故障查找问题提供了最佳途径。对提高工作效率，缩短停电时间，迅速恢复供电，提高供电可靠性和经济效益，有着十分重要的意义。
二、主要功能
1. 短路报警指示： 短路传感器在工作中检测线路的电流，当线路发生短路故障时电流达到或超过短路电流的整定值时，短路传感器发出报警信号，通过导线（光纤）传输给主机，主机接收到此信号后，产生相应的报警指示信号。
2. 接地报警指示： 接地传感器在工作中检测线路的零序电流，当线路发生接地故障时接地电流达到或超过接地电流的整定值时，接地传感器发出报警信号中，通过导线（光纤）传输到主机，主机接收到此信号后，产生相应的报警指示信号
3. 自 动 复 位 ： 当指示器发出报警信号后，如果无人工进行复位，在整定时间后，指示器可自动进行复位。
4. 人 工 复 位 ： 当指示器产生报警后，可通过按下指示器主机面板上的 “ 复位 / 测试 ” 按钮保持 2 秒解除报警。
5. 自 动 化： 指示器产生相应的报警指示信号后，可将报警信号输出远传。指示器也可接收远方的复位信号，对指示器进行远程复位操作。
6. 测 试 ： 指示器可进行自检工作。
三、安装
1 ．主机的安装：
主机可安装在环网柜 ( 配电柜、电缆分支箱等 ) 前面板上，拆卸主机须按下主机壳上的金属弹片。
主机尺寸： 96*48*80 mm 开孔尺寸： 92*44 mm
2 ．短路传感器的安装：
短路传感器必须安装在电缆的单相分支上，安装时可直接安装在被测电缆上，并进行紧固，防止滑动而造成脱落。
3 ．接地传感器的安装：
接地传感器安装时应注意需将电缆的三根导线包围起来，电缆的
接地线必须回穿传感器，并紧固，防止滑动而造成脱落。
ASSEMBLING INSTRUCTION
Earth Fault and Short Circuit Indicator Type EKL4
(Panel instrument)
Descrition
The earth fault and shot circuit indicator consists of：
l 1 pc reading instrument (panel instrument)
l 3 pcs sensors for detecting short circuit current
l 4 pcs linght cable
l 1 pc sensor for observing the sum current
l 1 pc flashing lamp (optional)
Installation of the reading instrument
The Earth Fault and Short Circuit Indicator is designed for panel installation .The necessary dimensions of the cutout are 91.5+0,6x44.5+0,6mm ( refer to figure 2 ) .Before sliding in the instrument , the electrical connections can be accomplished .The housing is slded into the opening and pushed with a light pressure up to stop position .Springs ( figure l ) serve to keep the reading instrument in its position .
Installation of the light cable
The sensor which is installed on the cable,is connected to
the reading instrument via light cable.Therefore the sensor
of core L 1has to be connected with the terminal L1 on the
back of the reading instrument.(The endings of the light
cables have to be pushed into the pick-up openings up to
stop position.)The same has to be done with the Sensors L2,
L3 and the earth fault sensor 14(figure 3).
Power supply
The power supply is performed via a 3.6 V lithium
battery.For exchanging the battery,a screw cap
on the front side of the indication housing must
be removed by turning it left.The battery must be
taken out and replaced by a new one.(With the
supply via lithium battery,the 230 VAC are only
connected in case the erath fault and short circuit
indicator type EK shall be reset also via recovering
voltage of the net.)
Electric connection
Depending one the version,the electrical connection has to be done according to the designations in figure 3.
Terminals without any marking(NC)are without any function.In principle,the information indicated on the reading instrument is valid.
Setting the display time
The time of displaying after a short circuit or earth is
adjustable.
There are three times to choose.The standard reste times are:1-2
-4h(other values are possible).The adjustment of the reset times
will be done by a rotaryswitch.The rotary switche is on the front
side of the indicator in the left top corner.The possible switch
positions are shown if figure 4.
Setting the operating points for short circuit
The adjustment of the operating points of the earth fault and shore circuit indicator indicator type EKL4 is done at the sensors.Three different operating points can be adjusted.The operating points are adjusted with a rotary switch at the front side of the sensor.The adjustable operating points are indicated on the front side of the sen
