Underfrequency Protection Saptuf (81); Multipurpose Protection; Overview; General Current And Voltage Protection Cvgapc - ABB REL670 Operator's Manual

1MRK506276-UUS B
9.3.6.4
9.3.7
9.3.7.1
9.3.7.2
9.3.8
9.3.8.1
9.3.8.2
Operator's manual

Underfrequency protection SAPTUF (81)

Main menu/Settings/Setting Group N/Frequency protection/
Underfrequency(PTUF,81)/TUF
Displays available instances of SAPTUF (81) with a number of settings per instance.
These include parameters like operation, base voltage, and pickup frequency. To
ensure the proper operation of the Underfrequency function the Operation setting must
be On.

Multipurpose protection

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.

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.

Scheme communication

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.
Scheme communication logic for distance or overcurrent protection
ZCPSCH (85)
Main menu/Settings/Setting Group N/Scheme communication/
ZSchemeCommunication(PSCH,85)/ZCOM
Section 9
Read and change settings
61