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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

Displays available instances of CVGAPC with a number of output quantities per

instance. These include error signals from overcurrent functions, trip and start

signals from overcurrent, undercurrent, overvoltage and undervoltage. There is a

block signal caused by second harmonic detection. The directional mode of OC1

and OC2 is shown as is low voltage for directional polarization. The current and

voltage as well as measured current multiplied by cos Phi and the angle between

voltage and current are also shown here.

1MRK 511 188-UEN C Section 11

Test the IED

Operator's manual

ABB rec670 User Manual

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