5-392 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALINPUTS/OUTPUTS CHAPTER 5: SETTINGS5FREQ RATE 1 MAX FREQUENCY — This setting defines the maximum frequency level required for operation of the element.The setting can be used to effectively block the feature based on frequency. For example, if the intent is to monitor adecreasing trend but only if the frequency is already below a certain level (such as for load shedding), set this setting to therequired frequency level.Figure 5-217: Frequency rate of change logic5.9 Inputs/outputs5.9.1 Contact inputsSETTINGS INPUTS/OUTPUTS CONTACT INPUTSIf the signal source assigned to the frequency rate of change element is only set to auxiliary VT, then the minimumvoltage supervision is 3 V. CONTACT INPUTS CONTACT INPUT H5a CONTACT INPUT H5a ID:Cont Ip 1Range: up to 20 alphanumericcharacters CONTACT INPUT H5aDEBNCE TIME: 6.0 msRange: 0.0 to 16.0 ms in steps of 0.5 CONTACT INPUT H5aEVENTS: DisabledRange: Disabled, Enabled↓ CONTACT INPUT xxx CONTACT INPUT THRESHOLDS
