3 PROTECTION FUNCTIONS
3.1 DISTANCE PROTECTION
Tripping characteristics
Operating time versus reach percentage, for faults close to line
angle.
50 Hz, SIR = 5
All quoted operating times include closure of the trip output
contact
Operating time versus reach percentage, for faults close to line
angle.
60 Hz, SIR = 5
All quoted operating times include closure of the trip output
contact
Operating time for resistive faults > 20% inside the
characteristic
50 Hz, up to SIR = 30 < 30 ms
60 Hz, up to SIR = 30 < 25 ms
Accuracy
Characteristic shape, up to SIR = 30
+/- 5% for on-angle fault (on the set line angle)
+/- 10% for off-angle fault
Example: For a 70 degree set line angle, injection testing at 40 degrees
would be referred to as "off-angle".
Zone time delay deviations +/- 20 ms or 2%, whichever is greater
3.2 POWER SWING BLOCKING
Accuracy
Accuracy of zones and timers As per Distance
Chapter 26 - Technical Specifications P446SV
688 P446SV-TM-EN-1
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