ABB RELION 650 Series Applications Manual

Also see for RELION 650 SERIES: Technical manual Technical manual Commissioning manual Engineering manual Operation manual

Contents

4.2.4.1 Example......................................................................................................................................474.2.4.2 Examples how to connect, configure and set VT inputs for most commonlyused VT connections............................................................................................................... 474.2.4.3 Examples on how to connect a three phase-to-earth connected VT to the IED......... 484.2.4.4 Example on how to connect a phase-to-phase connected VT to the IED.................... 504.2.4.5 Example on how to connect an open delta VT to the IED for high impedanceearthed or unearthed netwoeks............................................................................................524.2.4.6 Example how to connect the open delta VT to the IED for low impedanceearthed or solidly earthed power systems......................................................................... 534.2.4.7 Example on how to connect a neutral point VT to the IED.............................................. 55Section 5 Local HMI........................................................................................................... 595.1 Display............................................................................................................................................... 605.2 LEDs.................................................................................................................................................... 615.3 Keypad................................................................................................................................................625.4 Local HMI functionality...................................................................................................................645.4.1 Protection and alarm indication...............................................................................................645.4.2 Parameter management ........................................................................................................... 655.4.3 Front communication.................................................................................................................65Section 6 Differential protection.....................................................................................676.1 Low impedance restricted earth fault protection REFPDIF ................................................... 676.1.1 Identification................................................................................................................................ 676.1.2 Application.................................................................................................................................... 676.1.2.1 Transformer winding, solidly earthed................................................................................. 686.1.2.2 Transformer winding, earthed through zig-zag earthing transformer........................ 686.1.2.3 Autotransformer winding, solidly earthed......................................................................... 696.1.2.4 Reactor winding, solidly earthed.......................................................................................... 706.1.2.5 CT earthing direction............................................................................................................... 716.1.3 Setting guidelines........................................................................................................................ 716.1.3.1 Setting and configuration.......................................................................................................716.1.3.2 Settings...................................................................................................................................... 726.2 Line differential protection............................................................................................................736.2.1 Identification................................................................................................................................ 736.2.2 Application.................................................................................................................................... 736.2.2.1 Power transformers in the protected zone........................................................................ 746.2.2.2 Small power transformers in a tap....................................................................................... 756.2.2.3 Charging current compensation........................................................................................... 756.2.2.4 Time synchronization.............................................................................................................. 776.2.2.5 Analog signal communication for line differential protection........................................776.2.2.6 Configuration of analog signals............................................................................................786.2.2.7 Configuration of LDCM output signals................................................................................796.2.2.8 Open CT detection...................................................................................................................806.2.3 Setting guidelines........................................................................................................................816.2.3.1 General settings........................................................................................................................816.2.3.2 Percentage restrained differential operation.................................................................... 826.2.3.3 The 2nd and 5th harmonic analysis...................................................................................... 85Table of contents2Application manual