SNV-EFI Earth fault indicator
Type: surface mounted
Description
SNV-EFI earth fault indicator, it Widely used in various ring cabinets, high/ Medium or low -voltage switchgear and cable branch box in power system, can accurately and reliably detect the fault section and fault type ofpower grid in the Low/medium voltage network. The use of cable type grounding fault indicator is an efficientway to check cable fault, and is an effective way to improve the operation level of distribution network and theefficiency of fault handling. The design uses electromagnetic induction, and single chip microcomputer controltechnology to make fault alarm with high accuracy and strong anti-interference ability. Equipped with fault remote transmission port, suitable for distribution network automation; Battery lowpower alarm indication; Low-power design, high-capacity lithium battery power supply, long battery life (morethan 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 on the display unit to indicatefault.
2）Display unit designed with button, it is convenient for reset or test.
3）The pulse width time of fault current can be set to prevent incorrect fault indication caused by surgecurrent.
4）It can reset and detect the remote fault indication device remotely by Scada or press key.
5）It can provide switch volume for external devices through remote contact.
6）It can choose the reset time after fault happen (when purchase, it need to tell factory to set,default8hours).
7）Remote fault indicating can be made by external lamp.
8）Earth fault alarm current,Multi-level can be settable through a DIP inside of the display nit(optional)
9）Low battery display and alarm test through press the “Test/reset” key by 3seconds.
10) Battery can be changeable conveniently.
Function description
1) Earth fault alarm indicating: when the earth fault sensor detected an earth fault current, and the currentis bigger than equal to or equal to the setting value, then the earth fault sensor send a signal to display unitthrough electric cable. And the display unit will display the alarm signal, at same time, the earth fault LED will beblinking.
2) 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 Min. working voltage 2.5V, then the BatteryLevel Led will be blinking 5 times; If battery voltage is normal, then only blink 1 times.
3)Automatic time reset: After the indicator alarm the fault, if there are without manual reset it, when thetime reach our reset time setting, indicator will automatically reset.
4) Manual reset: After the indicator alarm the fault, user can press the button “ reset/test” in a short timeto reset it.
5)Automatic Low voltage reset: Through inputting AC110-240V power to the pin 10,11 on the PCB in thedisplay unit, when fault indicating, at same the voltage powered off. when the voltage recover and power onagain, then indicator will be reset immediately via low voltage.
6) Out side AC110-240V power supply energy for display unit. It use the same as voltage of the “voltagereset” via pin 10,11.
7) Remote(Scada) reset/test: through short connect the pin 3,4, then indicator will be run the reset/testprocess, and Led will be blinking. *Connect the pin 3,4 by short time(1second), then it will be reset indicator. *connect the pin3,4 by a long time(3seconds), then it will be test indicator.
8)Remote indicating: Through connect the pin 5,6 to the external lamp , then it will be indicate fault whenany phase alarm fault.
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