9.3.4.5
Two step undervoltage protection UV2PTUV
Main menu/Settings/Setting Group N/Voltage protection/
UnderVoltage2Step(PTUV,27)/UV2PTUV:x
Displays available settable parameters. The operation mode, the operate voltage as
percentage of
Ubase
are examples of the settings available here.
9.3.4.6
Voltage differential protection VDCPTOV
Main menu/Settings/Setting Group N/Voltage protection/VoltageDiff(PTOV,
60)/VDCPTOV:x
Includes settings for voltage difference and timers.
9.3.5
Frequency protection
9.3.5.1
Overview
For Frequency protection there are settings for Underfrequency, Overfrequency
and Rate of change of frequency. Each category has some instances of parameters.
All functions can be set On or Off and have a number of other settable parameters
such as rated voltage and time delay before tripping.
9.3.5.2
Overfrequency protection SAPTOF
Main menu/Settings/Setting Group/Frequency protection/
OverFrequency(PTOF,81)/SAPTOF:x
Displays available instances of SAPTOF with a number of settings per instance.
The settings are operation, start frequency, base voltage setting, internal blocking
level, operate time delay and reset time delay. For the Overfrequency function to
operate correctly the
Operation
setting must be
On
.
9.3.5.3
Rate-of-change frequency protection SAPFRC
Main menu/Settings/Setting Group N/Frequency protection/
RateOfChangeOfFrequency(PFRC,81)/SAPFRC:x
Displays available instances of SAPFRC with some settings per instance. The
settings include parameters such as operation, base voltage setting, start frequency,
internal blocking level, time delay to trip and frequency restoration.
9.3.5.4
Underfrequency protection SAPTUF
Main menu/Settings/Setting Group N/Frequency protection/
Underfrequency(PTUF,81)/SAPTUF:x
Section 9
1MRK505209-UEN E
Read and change settings
60
Operator's manual
