Name Type Values (Range) Unit DescriptionIL3-diff:1 FLOAT32 0.00...80.00 Measured differentialcurrent amplitude phaseIL3IL1-bias:1 FLOAT32 0.00...80.00 Measured bias currentamplitude phase IL1IL2-bias:1 FLOAT32 0.00...80.00 Measured bias currentamplitude phase IL2IL3-bias:1 FLOAT32 0.00...80.00 Measured bias currentamplitude phase IL34.3.1.11 Technical dataTable 579:LNPLDF Technical dataCharacteristics ValueOperation accuracy1) Depending on the frequency of the measuredcurrent: fn ±2 HzLow stage ±2.5% of the set valueHigh stage ±2.5% of the set valueHigh stage, operate time 2)3) Minimum Typical Maximum20 ms 23 ms 27 msReset time Typically 40 msReset ratio Typically 0.96Retardation time <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)Suppression of harmonics RMS: No suppressionDFT: -50 dB at f = n × fn, where n = 2, 3, 4, 5,…Peak-to-Peak: No suppression1) 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) Measured with static power output. When differential current = 2 ×High operate value and fn = 50 Hzwith galvanic pilot wire link + 5 ms.4)Low operate value multiples in the range of 1.5...204.3.2 Stabilized and instantaneous differential protection for two-winding transformers TR2PTDF4.3.2.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberStabilized and instantaneous differentialprotection for two-winding transformersTR2PTDF 3dI>T 87T1MRS759142 C Section 4Protection functionsREX640 591Technical Manual
