Startco Engineering Ltd.
Page 9
FPU-16 Feeder Protection Unit
Rev. 0
Pub. FPU-16-M, November, 1997
Downloaded from the Internet, see Disclaimer.
All programmed values and values-at-trip are stored in nonvolatile memory.
When data are retrieved from this memory, error-detection techniques check for
corrupted data. If data are suspect, the unit will trip, “0bAd” will be displayed,
and default values will be loaded. If “0bAd” is displayed, defeat the program-
change lockout, reprogram the unit, and reset Mode 0.
Set-Point Range.................................... 1 s to 45 s @ 6 x I
n
Set-Point Step Size ............................... 1 s
Display Codes:
Trip ............................................. 0FFF
Alarm.......................................... 0AAA*
Set Point Deleted ........................ 0ddd*
Memory Error .............................. 0bAd
Default Values:
Trip ............................................. 10 s @ 6 x I
n
Alarm.......................................... 9 s @ 6 x I
n
*
Alarm is on when I
2
t
(Alarm Set Point/Trip Set Point) x 100%. Deleting
the TRIP function automatically deletes the ALARM function.
3.3
MODE 1 — SHORT-TIME OVERCURRENT
This mode is used to enter short-time overcurrent set points and to annunciate
short-time overcurrent alarms and trips.
The short-time overcurrent trip-and-alarm time is selected in Mode 5. Four trip-
and-alarm times are available as 3-, 6-, 12-, and 24-cycle minimums. See Table
2.
Set-Point Range.................................... 1 to 9 x CT-Primary Rating
Set-Point Step Size ............................... 0.1 x CT-Primary Rating
Trip-and-Alarm Times ............................ 3, 6, 12, or 24 cycles
Trip-and-Alarm Time Accuracy............... +3, -0 cycles
Display Codes:
Trip ............................................. 1FFF
Alarm.......................................... 1AAA
Set Point Deleted ........................ 1ddd
Default Values:
Trip Time .................................... 3 cycles
Trip Level .................................... 7 x CT-Primary Rating
Alarm Level ................................. 5 x CT-Primary Rating