P14x
4
PERFORMANCE OF VOLTAGE PROTECTION FUNCTIONS
4.1
UNDERVOLTAGE PROTECTION
Pick-up (IDMT and DT)
Drop-off (IDMT and DT)
IDMT operate
DT operate
DT reset
Repeatability
4.2
OVERVOLTAGE PROTECTION
Pick-up (IDMT and DT)
Drop-off (IDMT and DT)
IDMT operate
DT operate
DT reset
Repeatability
4.3
RESIDUAL OVERVOLTAGE PROTECTION
IDMT pick-up
DT pick-up
Drop-off (IDMT and DT)
IDMT operate
DT operate
DT reset
Repeatability
4.4
NEGATIVE SEQUENCE VOLTAGE PROTECTION
Pick-up
Drop-off
DT operate
Repeatability
P14xEd1-TM-EN-1
Chapter 23 - Technical Specifications
Setting +/- 5%
1.02 x Setting +/-5%
+/- 5% or 50 ms, whichever is greater
+/- 2% or 50 ms, whichever is greater
< 75 ms
< 1%
Setting +/- 5%
0.98 x Setting +/-5%
+/- 5% or 50 ms, whichever is greater
+/- 2% or 50 ms, whichever is greater
< 75 ms
< 1%
1.05 x Setting +/- 5%
Setting +/- 5%
0.95 x Setting +/-5%
+/- 5% or 65 ms, whichever is greater
+/- 2% or 60 ms or whichever is greater
< 35 ms
< 10%
Setting +/- 5%
0.95 x Setting +/-5%
+/- 2% or 50 ms, whichever is greater
< 5%
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