Two Step Residual Overvoltage Protection Rov2Ptov; Two Step Undervoltage Protection Uv2Ptuv; Voltage Differential Protection Vdcptov; Frequency Protection - ABB REC670 Operator's Manual

1MRK 511 188-UEN C
9.3.4.4
9.3.4.5
9.3.4.6
9.3.5
9.3.5.1
9.3.5.2
9.3.5.3
Operator's manual
Displays several settable parameters including settings for IDMT curves and other
function related settings.

Two step residual overvoltage protection ROV2PTOV

Main menu/Settings/Setting Group N/Voltage protection/
ResidualOverVoltage2Step(PTOV,59N)/TRV
Displays up to several settable parameters for characteristics and many related
parameters.

Two step undervoltage protection UV2PTUV

Main menu/Settings/Setting Group N/Voltage protection/
UnderVoltage2Step(PTUV,27)/TUV
Displays available settable parameters. The operation mode, the operate voltage as
percentage of Ubase are examples of the settings available here.

Voltage differential protection VDCPTOV

Main menu/Settings/Setting Group N/Voltage protection/VoltageDiff(PTOV,
60)/VDC
Includes settings for voltage difference and timers.

Frequency protection

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.

Overfrequency protection SAPTOF

Main menu/Settings/Setting Group/Frequency protection/
OverFrequency(PTOF,81)/TOF
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.

Rate-of-change frequency protection SAPFRC

Main menu/Settings/Setting Group N/Frequency protection/
RateOfChangeOfFrequency(PFRC,81)/RCF
Read and change settings
Section 9
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