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SNV-EKL4 v2.1 Earth fault and short circuit indicator
Type: cable type,surface mounted,battery 19000mHA
Description
SNV-EKL4 v2.1, Earth fault and short circuit indicator, it Widely used in various ring cabinets, high/ Medium
or low -voltage switch gear and cable branch box in power system, can accurately and reliably detect the fault
section and fault type of power grid in the Low/medium voltage network. The use of cable type grounding fault
and short circuit indicator is an efficient way to check cable fault, and is an effective way to improve the
operation level of distribution network and the efficiency of fault handling. The design uses electromagnetic
induction, and single chip microcomputer control technology to make fault alarm with high accuracy and strong
anti-interference ability.
Equipped with fault remote transmission port, suitable for distribution network automation; Battery low
power alarm indication; Low-power consumption design, high-capacity lithium battery power supply, long
battery life (more than 10 years); external structure using card or lock design, the whole machine is easy to
load and unload.

Function character：
1) Intelligent detection of ground fault and through the corresponding LED (I0),on the display unit to
indicate fault.
2) Intelligent detection of short circuit fault of phase to phase and through the corresponding LED (L1,
L2,L3),on the display unit to indicate fault.
3）Display unit designed with button, it is convenient for reset or test.
4）The pulse width time of fault current (Response time) can be set to prevent incorrect fault indication
caused by surge current through modbus of RS485 port.
5）It can reset and detect the remote fault indication device remotely by SCADA or press key.
6）It can provide switch volume for external devices through remote contact.
7）It can change the reset time after fault happen through Modbus of RS485 port. (when purchase, it need
to tell factory to set,default 8hours).
8）Remote fault indicating can be made by external lamp.
9）Earth fault alarm current (40/50/60/70/80/100/120/250A)
Tripping current(350/400/450/500/550/600/650/700A),8-level can be settable through a
DIP switch inside of the display unit.(optional).
10）Low battery display and alarm test through press the “Test/reset” key by 3seconds.
11) Battery can be changeable conveniently, Big capacity 19000mHA,D- Size, ER34615.
12) Sensor cable spec: NYAF,copper cable,(2x1.5 ㎟ ) ,7 meters length.
13) Support AC/DC power input, AC48-240V.
14) Support Automatic Low voltage reset, AC>30V.

Function description
1) Earth fault alarm indicating: when the earth fault sensor detected an earth fault current, and the
current is bigger than equal to or equal to the setting value, then the earth fault sensor send a signal to display
unit through electric cable. And the display unit will display the alarm signal, at same time, the earth fault LED
will be blinking.
2) Short circuit indicating: when the short circuit sensor detected an over current, and the current is
bigger than equal to or equal to the setting value, then the short circuit sensor send a signal to display unit
through electric cable. And the display unit will display the alarm signal, at same time, corresponding LED (L1,
L2,L3) will be blinking to indicate the fault.
3) Battery low voltage alarm indicating: the display unit use the battery to supply power. When we press the
“Test” button,3seconds time: If the battery voltage is lower than the working voltage Min.2.5V, then the Battery
Level Led will be blinking 5 times; If battery voltage is normal, then only blink 1 times.
4)Automatic time reset: After the indicator alarm the fault, if there are without manual reset it, when the
time reach our reset time setting, indicator will automatically reset.
5) Manual reset: After the indicator alarm the fault, user can press the button “ reset/test” in a short time
to reset it.
6)Automatic Low voltage reset: Through inputting AC30-240V power to the pin 14,15 on the PCB in the
display unit, when indicating fault, at same the voltage powered off. when the voltage recover and power on
again, then indicator will be reset immediately via low voltage.
7) Out side AC110-240V power supply energy for display unit. It use the same as voltage of the “voltage
reset” via pin 14,15.ZhuHai City SNOVA Technology CO., Ltd
www.snovatech.com www.snovaglobal.com
SNV-EKL4 v2.1 Earth fault and short circuit indicator User Manual& Data sheet
Tel:0086-0756-8621065 Fax:0086-0756-8618303 Mobile phone:0086-13570657698 Email: snovatech@163.com Contact: Andrew Mao
8) Remote(Scada) reset/test: through short connect the pin 12,13 then indicator will be run the reset/test
process, and Led will be blinking.
*Connect the pin 12,13 by short time(1second), then it will be reset indicator.
* connect the pin 12,13 by a long time(3seconds), then it will be test indicator.
9）Remote indicating: Through connect the pin 16,17 to the external lamp , then it will be indicate fault
when any phase alarm fault.
10）Remote to SCADA system by Modbus: connect pin 18 (A), 19 (B).