Smart Fault Indicator (SFI)

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  • >=3 Units
Lead Time:
Quantity(Units) 1 - 3 >3
Est. Time(days) 21 Negotiable
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Quick Details
Place of Origin:
South Korea
Brand Name:
Model Number:
EMT SFI (Single)
Supply Ability
Supply Ability:
3000 Unit/Units per Year
Packaging & Delivery
Lead Time :
Quantity(Units) 1 - 3 >3
Est. Time(days) 21 To be negotiated



[Smart Fault Indicator (SFI) (Single)]

SFI (Single) perceives faults on a distribution line showing white and red LED flashing.



1. General Scope

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

 Basically, it - SFI Single - shall make LED flashing in visible when it detects fault current on the downstream distribution line. Its fault location of distribution line is quickly recognized and helps a patrol man to 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

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


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.



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