[Smart Fault Indicator (SFI) (Single)]

 SFI (Single) detects 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	?, 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.