【正文】 breaker selection ............................................................ 30 Requires transformer and selection ........................................................... 31 Substation busbar installation options ....................................................... 32 6 kV electrical equipment choice .................................................................... 34 6 kV line into the cabi ....................................................................... 34 6 kV contact tank.................................................................................... 37 6 kV voltage transformer cabi choices .............................................. 38 6 kV distribution out of choice............................................................... 39 Compensation capacitor in the selection of control cabi...................... 39 Substation electricity cabi choices ....................................................... 39 6 kVbusbar selection ................................................................................. 40 6 kV distribution line choice ..................................................................... 41 Highvoltage through walls ....................................................................... 42 Busbar selection of post insulator ................................................................... 42 Pillar insulator option .............................................................................. 42 Indoor post insulator choice ...................................................................... 42 60 kv and 6 kv transmission line selection and installation ............................ 43 Conductor material choice ........................................................................ 43 Insulator choice ......................................................................................... 43 The choice of hardware ............................................................................. 43 The choice of the pole ............................................................................. 43 Overhead line laying ................................................................................. 43 Chapter 6 The relay protection planning and design ........................................ 44 Overview of relay protection ........................................................................... 44 Main transformer protection and setting ......................................................... 44 The substation protection for main transformer used as follows .............. 44 The connection mode of the main transformer protection ........................ 44 Protection device of choice ....................................................................... 44 Main transformer protection setting calculation ....................................... 45 60 kV line protection is calculated ............................................................... 48 60 kV line protection ................................................................................. 48 年產(chǎn)為 180 萬噸煤礦地面變電所設計 IX 6 kV distribution line protection calculation ............................................. 49 6 kV system leakage protection....................................................................... 51 Leakage protection device......................................................................... 51 Protection of 6 kV power capacitor ................................................................. 52 6 kv busbar contact tank protection principle and setting ............................... 54 Installed principles of protective device.................................................... 54 The connection mode of protection device ............................................... 54 Protective device setting calculation ......................................................... 54 Chapter 7 Grounding lightning protection and security planning and design ....................................................................................................... 56 Reason and harm of the overvoltage ............................................................... 56 Prevent direct lightning protection .................................................................. 56 Lightning prevention measures ................................................................. 57 The height of the lightning rod and the determination of position............ 57 Lightning rod protection plan.................................................................... 58 The overvoltage suppression.................................................................... 58 For 60 kv line protection ........................................................................... 28 Protection of the lightning invasion wave ....................................................... 58 Grounding measures ........................................................................................ 59 Protective earthing .................................................................................... 60 Laying grounding device........................................................................... 60 Grounding resistance calculation .............................................................. 60 Grounding lightning rod .................................................................................. 61 Chapter 8 Substation indoor and outdoor decorating .......................................... 62 Indoor and outdoor .......................................................................................... 62 Indoor decorate ................................................................................................ 63 Conclusion..................................................................................................