SNV-EFI 3.0 &3.1  Smart Earth fault indicator

Type: LCD display

Note:

SNV-EFI3.0: LCD Display unit, withSNOVA CT ;  SNV-EFI3.1:  LCD Display unit withRogowsky CT.

Description

 SNV-EFI3.0 EArth fault indicator, itWidely used in various ring cabinets, high/ Medium or low-voltageSwitch 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 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 design, high-capacity lithium battery power supply, long battery life (more than10 years); external structure using card or lock design, the whole machine is easy to load and unload.

 

 

Outlook:

 

 

 

Function character:

1) Intelligent detection of ground fault and through the corresponding LED on the display unit to indicate fault.

2) LCD screen display the grounding current on time.

3)Display unit Designed with button, it isConvenient for reset or test.

4)the pulse width time of fault current (response delay time) can be set to prevent incorrect fault indication caused by surge current.

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 canChoose the reset time after fault happen (when purchase, it need to tell factory to set,default 8hours).

8)Remote fault indicating can be made by externallamp.

9)Earth fault alarm current,Multi-level can be settable via LCD buttons.

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) 25-levels tripping current: from 10A to 250A, interval 10A, can be settable on LCD

14) Reset time adjustable: from Min. 1H up to 200H on LCD. Interval 1H.

15) Response delay time adjustable: from Min. 10ms up to 1000ms. Interval 10ms

 

 

FunctionDescription

1) Earth fault alarm indicating:  

When the earth fault sensor detected an Earth fault current,and the current isBigger Than equal to or equal to the setting value and the fault current flow time is over the response delay time,  theN Indicator Will display the alarm signal, at same time, the earth fault LED will beBlinking.

2) BAttery Low voltage alarm indicating: theDisplay unitUse the battery to supply power.When we press the"R/T"  Button,3seconds time: If the battery voltage is lower than theMin. Working voltage 2.5V, then theBattery Level LED will be blinking 5 times; If battery voltage is normal, then only blink 1 times.

4)AutomatictimeReset:  after the indicator alarm the fault, if there are without manual reset it,When the time reach our reset time setting, indicator willAutomatically Reset.

5) Manual reset:  after the indicator alarm the fault, user can press the button"  R/T"  in a short time to reset it.

6)Automatic Low voltageReset: throughInputting AC30-240VPower tothe pin10,11 on the PCB in the display unit, When fault indicating, at same the voltage powered off. When the voltage recover and power on again,  then IndicatorWill bereset 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 10,11.

8) Remote(SCADA) reset/test: through short connect the pin 3,4, then indicator will be run the reset/test process, 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(1.5 ~3seconds), then it will be test indicator.

9)Remote indicating:  through connect the pin5,6 to the externalLamp, then it will beIndicate fault When any phase alarm fault. 

Character list

Display type	LCD	Working power		BAttery as (back up)	Lithium battery (LiSOCl2) 3.6V/19000mAh,ER14505
Voltage grade	AC110V-40.5KV			Normal working	AC/DC 110-240V
Frequency	50HZ/60HZ	Power Consumption			Standby/ idle:≤0.3mA Working:≤3mA
Earthfault Alarm current Settable	10A up to 250A, Interval 10A	Battery life			≥10 year
Load fluctuation and escape pulse time setting, Settable	10ms up to 1000ms, interval 10ms	Low voltage alarm of battery			≤2.5V
Reset time,settable	1H up to100H, interval 1H	CT Cable type			NYAF, 2x1.5, 5meter; or customized
Alarm current accuracy	±10%	WOrk environment	Temperature		-40℃~+60℃
Rated frequency withstand voltage	2KV/1min		Humidity		≤95%RH
Relay contact capacity	≤95W	Use for Cable diameter			60mm~110mm Normally
Indicate Lamp	Red LED (Internal andeXternal)				80mm~150mm Customized
Connect SCADA	Available