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)/TUF
Displays available instances of SAPTUF with a number of settings per instance.
These include parameters like operation, base voltage, and start frequency. To
ensure the proper operation of the Underfrequency function the Operation setting
must be On.
9.3.6 Multipurpose protection
9.3.6.1 Overview
Under Multipurpose protection there are several instances of General current and
voltage parameters. This function has current and voltage inputs. The parameters
available are based on the data from these inputs. Within each instance operation
for the included functions can be set to On or Off and a large number of parameters
can be set.
9.3.6.2 General current and voltage protection CVGAPC
Main menu/Settings/Setting Group N/Multipurpose protection/
GeneralCurrentVoltage(GAPC)/GF
Displays available instances of CVGAPC with several settable parameters per
instance. These settings are available for the user defined functions configured with
the help of the Multipurpose protection function.
9.3.7 Scheme communication
9.3.7.1 Overview
Under Scheme communication there are settings for Zone scheme communication,
Zone current reversal, Local acceleration logic, EF Scheme communication and EF
Current reversal weak end infeed. In each category the function can be switched
On or Off and time delays, ratings and parameters can be set.
9.3.7.2 Scheme communication logic for distance or overcurrent protection
ZCPSCH
Main menu/Settings/Setting Group N/Scheme communication/
ZSchemeCommunication(PSCH,85)/ZCOM
Section 9 1MRK 511 188-UEN C
Read and change settings
58
Operator's manual
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