11.6.4.6
Voltage differential protection VDCPTOV
Main menu/Test/Function status/Voltage protection/VoltageDiff(PTOV,60)/
VDC
Displays the output data of VDCPTOV.
11.6.5
Frequency protection
The measurements generated by the Underfrequency, Overfrequency and Rate-of-
change of frequency functions are available under the paths outlined below.
11.6.5.1
Overfrequency protection SAPTOF
Main menu/Test/Function status/Frequency protection/
OverFrequency(PTOF)/TOF
Displays available instances of SAPTOF with some measurements per instance
consisting of trip and start signal status. The start duration as percentage of the total
trip time and a blocking indication as a result of low voltage.
11.6.5.2
Rate-of-change frequency protection SAPFRC
Main menu/Test/Function status/Frequency protection/
RateOfChangeOfFrequency(PFRC)/RCF
Displays available instances of SAPFRC with measurement data for trip and start
signals. There is also a restore signal for load restoring purposes, a start duration
time and a blocking indication caused by a drop in voltage.
11.6.5.3
Underfrequency protection SAPTUF
Main menu/Test/Function status/Frequency protection/
UnderFrequency(PTUF,81)/TUF
Displays available instances of SAPTUF with some measurements indicating status
of trip, start, restore signals and showing possible blocking due to low amplitude as
well as the start duration as a percentage of the total operation time.
11.6.6
Multipurpose protection
The data generated by the multipurpose function comprises various trip and start
signals, block of second harmonic detection, various measured current values and
the angle between current and voltage.
11.6.6.1
General current and voltage protection CVGAPC
Main menu/Test/Function status/Multipurpose protection/
GeneralCurrentVoltage(GAPC)/GFO
Section 11
1MRK 502 014-UEN C
Test the IED
70
Operator's manual
