Smart Fault Indicator (SFI) (2) MODEL

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5 Set/Sets (Min. Order)
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Place of Origin:
South Korea
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Lead Time :
2 - 6 weeks from the order confirmation


1. General Scope

 EMT Smart Fault Indicator (SFI) (2) MODEL is a useful and reliable electrical equipment to find out fault location on the overhead distribution lines.

 It shall make LED flashing in visible when it detects fault current on the downstream distribution line. It sends fault trigger signal immediately to the computer and can be controlled. Its fault location of distribution line is quickly recognized and helps dispatch center to control and recover power outage.


2. General Specification

Rating Voltage

3 ~ 75 kV

Rating Current

up to 1000 A

Rating Frequency

50 / 60 Hz

Fault Detection

Phase to phase fault

Phase to earthing fault

Fault Current Pick-up

Automatic set of fault triggering algorithm

Different Flashing Indication between Transient and Permanent Fault

White LED Flashing (Transient Fault)

Red LED Flashing (Permanent Fault)

* White LED Short Interval Flickering for Reclosing Progressing

Flashing Indication Signal Time

½, 1, 2, 4, 8, (16) hour(s)

Low Battery Indication

Green LED signal


3. Smart FI Function

1) Inrush restrain specific algorithm integrated

2) Indication test function for transient fault, permanent fault, and reset signal

  * Fault triggering signal test probe : 1 each provided every 50 FI (or 20 sets of SFI (2) MODEL)

3) Live line mounting and dismounting on hot line by hot stick

  * Installation hot stick (optional)

4) Self power charging device : DC 3.7 v

5) Automatic & manual reset function


4. Smart Fault Indicator Operation Schematic Diagram

  • In case of transient fault (within 3 minutes) at “A” point :

SFI shall be flashing LED (white color) during the set time

  • In case of permanent fault (over 3 minutes) at “B” point :

SFI shall be flashing LED (red color) shall be flashing during set time, and immediately stopped when the live voltage is recharged.



5. SFI (2) MODEL - model selection & system device

1) Components – 3 SFI units + 1 RSUⅡ (Receiving & Sending Unit) (recommended)

  * Installation hot stick (optional)

  * Solar charging device (optional)

  * Backstage software in dispatch center for SFI (2) MODEL (optional)

2) Function : Remote monitoring of load current & fault triggering signal via computer by SCADA system in RF, GSM, GPRS network

  * Communication protocol : DNP 3.0, IEC 101, 104, Mod bus, others

3) 1set of RSUⅡ covers 9 units of SFI (2) MODEL in 20 ~100m RF range


6. RSUⅡ (Receiving & Sending Unit) Configuration

1) RTUⅡ current monitoring (instead of GSM Module)

2) External fault signal flashing lamp

3) Rechargeable battery : DC12V (or DC 24V)

4) External battery charger : AC 220V / DC12 (24)V - external power supply ( P.T, or solar charging device)

5) Panel enclosure box : Poly box, or metal box

6) Smart fault indicator system configuration

7) Typical Smart Fault Indicator System Installation



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