2.4.2 General controller functions........................................................................................................................................................................................ 40
3. AC configuration and nominal settings
3.1 AC configuration......................................................................................................................................................................................................................44
3.1.1 System................................................................................................................................................................................................................................. 44
3.1.2 [Source] and [Busbar] for each controller type....................................................................................................................................................46
3.1.3 [Source] AC configuration............................................................................................................................................................................................46
3.1.4 [Busbar] AC configuration............................................................................................................................................................................................49
3.1.5 Voltage and frequency as digital outputs...............................................................................................................................................................50
3.1.6 4th current input configuration....................................................................................................................................................................................50
3.2 Nominal settings......................................................................................................................................................................................................................51
3.2.1 General information on nominal settings...............................................................................................................................................................51
3.2.2 Nominal power calculations........................................................................................................................................................................................ 53
3.3 AC measurements as analogue outputs.................................................................................................................................................................... 54
3.3.1 Introduction.........................................................................................................................................................................................................................54
3.3.2 [Source] AC measurements........................................................................................................................................................................................54
3.3.3 [Busbar] AC measurements........................................................................................................................................................................................59
3.3.4 4th current input............................................................................................................................................................................................................... 60
3.4 Source AC protections.........................................................................................................................................................................................................61
3.4.1 Information about protections.....................................................................................................................................................................................61
3.4.2 [Source] over-voltage (ANSI 59)............................................................................................................................................................................... 62
3.4.3 [Source] under-voltage (ANSI 27)............................................................................................................................................................................ 63
3.4.4 [Source] voltage unbalance (ANSI 47)................................................................................................................................................................... 63
3.4.5 Negative sequence voltage (ANSI 47)................................................................................................................................................................... 64
3.4.6 Zero sequence voltage (ANSI 59Uo)...................................................................................................................................................................... 65
3.4.7 Over-current (ANSI 50TD)...........................................................................................................................................................................................66
3.4.8 Fast over-current (ANSI 50/50TD)........................................................................................................................................................................... 66
3.4.9 Current unbalance (ANSI 46)..................................................................................................................................................................................... 67
3.4.10 Directional over-current (ANSI 67)........................................................................................................................................................................ 68
3.4.11 Inverse time over-current (ANSI 51)..................................................................................................................................................................... 68
3.4.12 Negative sequence current (ANSI 46)................................................................................................................................................................. 72
3.4.13 Zero sequence current (ANSI 51Io)...................................................................................................................................................................... 73
3.4.14 [Source] over-frequency (ANSI 81O)....................................................................................................................................................................74
3.4.15 [Source] under-frequency (ANSI 81U)................................................................................................................................................................. 74
3.4.16 Overload (ANSI 32)......................................................................................................................................................................................................75
3.4.17 Reverse power (ANSI 32R)...................................................................................................................................................................................... 76
3.4.18 Reactive power export (ANSI 40O).......................................................................................................................................................................76
3.4.19 Reactive power import (ANSI 40U)....................................................................................................................................................................... 77
3.4.20 Generator differential current protection (ANSI 87G).................................................................................................................................... 77
3.4.21 Synchronisation check, including blackout close (ANSI 25).......................................................................................................................79
3.5 Busbar AC protections.........................................................................................................................................................................................................79
3.5.1 [Busbar] over-voltage (ANSI 59)............................................................................................................................................................................... 79
3.5.2 [Busbar] under-voltage (ANSI 27)............................................................................................................................................................................ 80
3.5.3 [Busbar] voltage unbalance (ANSI 47)................................................................................................................................................................... 81
3.5.4 [Busbar] over-frequency (ANSI 81O)...................................................................................................................................................................... 82
3.5.5 [Busbar] under-frequency (ANSI 81U)....................................................................................................................................................................83
3.6 Other AC protections............................................................................................................................................................................................................ 84
3.6.1 Lockout relay (ANSI 86)................................................................................................................................................................................................84
3.6.2 Earth inverse time over-current (ANSI 51G)........................................................................................................................................................ 85
DESIGNER'S HANDBOOK 4189340911K UK Page 3 of 521