4.3.1.10 Technical dataTable 337:LNPLDF Technical dataCharacteristics ValueOperation accuracy 1) Depending on the frequency of the measuredcurrent: fn ±2 HzLow stage ±2.5% of the set valueHigh stage ±2.5% of the set valueMinimum Typical MaximumHigh stage, operate time 2)3) 22 ms 25 ms 29 msReset time Typically 40 msReset ratio Typically 0.96Retardation time (Low stage) <40 msOperate time accuracy in definite time mode ±1.0% of the set value or ±20 msOperate time accuracy in inverse time mode ±5.0% of the set value or ±20 ms 4)1) With the symmetrical communication channel (as when using dedicated fiber optic).2) Without additional delay in the communication channel (as when using dedicated fiber optic).3) Including the delay of the output contact. When differential current = 2 ×High operate value and fn =50 Hz with galvanic pilot wire link + 5 ms.4)Low operate value multiples in range of 1.5...20.4.3.1.11 Technical revision historyTable 338:LNPLDF Technical revision historyTechnical revision ChangeB Step value changed from 0.05 to 0.01 for theTime multiplier setting.C Support for in-zone transformer added.Differential and bias currents are shown as ratedcurrents in the Measurements view.4.3.2 Stabilized and instantaneous differential protection for 2W-transformers TR2PTDF4.3.2.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberStabilized and instantaneousdifferential protection for 2W-transformersTR2PTDF 3dI>T 87T1YHT530004D05 D Section 4Protection functions615 series 383Technical Manual
