Smart Fault Indicator (SFI)

[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	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.