5-188 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUALFLEXLOGIC CHAPTER 5: SETTINGS5FLEXELEMENT 1 HYSTERESIS — This setting defines the pickup–dropout relation of the element by specifying the width of thehysteresis loop as a percentage of the pickup value as shown in the FlexElement Direction, Pickup, and Hysteresis diagram.FLEXELEMENT 1 dt UNIT — Specifies the time unit for the setting FLEXELEMENT 1 dt. This setting is applicable only ifFLEXELEMENT 1 COMP MODE is set to “Delta.”FLEXELEMENT 1 dt — Specifies duration of the time interval for the rate of change mode of operation. This setting isapplicable only if FLEXELEMENT 1 COMP MODE is set to “Delta.”FLEXELEMENT 1 PKP DELAY — Specifies the pickup delay of the element.FLEXELEMENT 1 RST DELAY — Specifies the reset delay of the element.5.6.8 Non-volatile latchesSETTINGS FLEXLOGIC NON-VOLATILE LATCHES LATCH 1(16)The non-volatile latches provide a permanent logical flag that is stored safely and do not reset upon restart after the relayis powered down. Typical applications include sustaining operator commands or permanently blocking relay functions,such as Autorecloser, until a deliberate interface action resets the latch.LATCH 1 TYPE — This setting characterizes Latch 1 to be Set- or Reset-dominant.LATCH 1 SET — If asserted, the specified FlexLogic operands 'sets' Latch 1.BUS DIFFERENTIAL RESTRAININGCURRENT(Bus Rest Mag)IBASE = maximum primary RMS value of the +IN and – IN inputs(CT primary for source currents, and bus reference primary current for bus differential currents)DCmA BASE = maximum value of the DCMA INPUT MAX setting for the two transducers configuredunder the +IN and –IN inputsDELTA TIME BASE = 1 μsFREQUENCY f BASE = 1 HzPHASE ANGLE ϕBASE = 360 degrees (see the UR angle referencing convention)POWER FACTOR PF BASE = 1.00RTDs BASE = 100°CSOURCE CURRENT IBASE = maximum nominal primary RMS value of the +IN and –IN inputsSOURCE ENERGY(Positive and Negative Watthours,Positive and Negative Varhours)EBASE = 10000 MWh or MVAh, respectivelySOURCE POWER P BASE = maximum value of V BASE × I BASE for the +IN and –IN inputsSOURCE VOLTAGE VBASE = maximum nominal primary RMS value of the +IN and –IN inputs LATCH 1 LATCH 1FUNCTION: DisabledRange: Disabled, Enabled LATCH 1 ID:NV Latch 1Range: up to 20 alphanumeric characters LATCH 1 TYPE:Reset DominantRange: Reset Dominant, Set Dominant LATCH 1 SET:OffRange: FlexLogic operand LATCH 1 RESET:OffRange: FlexLogic operand LATCH 1TARGET: Self-resetRange: Self-reset, Latched, Disabled LATCH 1EVENTS: DisabledRange: Disabled, EnabledUnit Description
