Deif PPM 300 - 4. Operating the system; 4.2 GENSET controller basic actions

3.6.3 Neutral inverse time over-current (ANSI 51N).................................................................................................................................................... 86
3.7 ACM voltage measurement errors................................................................................................................................................................................. 87
3.7.1 [Source]/[Busbar] L1-L2-L3 wire break...................................................................................................................................................................87
3.7.2 [Source]/[Busbar] L# wire break................................................................................................................................................................................88
3.8 ACM module general protections...................................................................................................................................................................................88
3.8.1 ACM 1 protections not running.................................................................................................................................................................................. 88
3.8.2 ACM 1 data is missing...................................................................................................................................................................................................89
4. Alarms
4.1 Introduction................................................................................................................................................................................................................................ 90
4.1.1 Overview of alarm processing....................................................................................................................................................................................90
4.1.2 Alarm levels........................................................................................................................................................................................................................92
4.1.3 Operate time......................................................................................................................................................................................................................93
4.1.4 Customising alarms........................................................................................................................................................................................................ 93
4.2 Alarm parameters....................................................................................................................................................................................................................94
4.2.1 Overview of alarm parameters...................................................................................................................................................................................94
4.2.2 Set point.............................................................................................................................................................................................................................. 96
4.2.3 Reset hysteresis...............................................................................................................................................................................................................96
4.2.4 Action....................................................................................................................................................................................................................................96
4.2.5 Delay.....................................................................................................................................................................................................................................99
4.2.6 Inhibit(s)............................................................................................................................................................................................................................ 100
4.2.7 Enable................................................................................................................................................................................................................................100
4.2.8 Trigger level.....................................................................................................................................................................................................................100
4.2.9 Auto acknowledge........................................................................................................................................................................................................ 101
4.2.10 Latch................................................................................................................................................................................................................................ 101
4.2.11 Suppress action parameter.................................................................................................................................................................................... 101
4.2.12 Alarm test.......................................................................................................................................................................................................................101
4.2.13 Additional alarm information.................................................................................................................................................................................. 102
4.3 Customised inhibits............................................................................................................................................................................................................ 102
4.3.1 Configuring customised inhibits.............................................................................................................................................................................. 102
4.3.2 Suppress action inhibit................................................................................................................................................................................................103
4.4 Alarm handling.......................................................................................................................................................................................................................103
4.4.1 Overview of alarm handling...................................................................................................................................................................................... 103
4.4.2 Acknowledge...................................................................................................................................................................................................................105
4.4.3 Shelve................................................................................................................................................................................................................................106
4.4.4 Out of service..................................................................................................................................................................................................................107
4.4.5 Latch reset....................................................................................................................................................................................................................... 108
4.5 Alarm test and status..........................................................................................................................................................................................................109
4.5.1 Alarm test......................................................................................................................................................................................................................... 109
4.5.2 Alarm status digital outputs.......................................................................................................................................................................................110
4.6 Horn outputs............................................................................................................................................................................................................................ 111
4.6.1 Horn output function..................................................................................................................................................................................................... 111
4.6.2 Silencing alarms.............................................................................................................................................................................................................116
4.7 Non-essential loads............................................................................................................................................................................................................. 116
4.7.1 Single-line diagram.......................................................................................................................................................................................................116
4.7.2 Non-essential load trip (NEL) function..................................................................................................................................................................117
4.7.3 NEL # over-current....................................................................................................................................................................................................... 121
4.7.4 NEL # under-frequency.............................................................................................................................................................................................. 121
4.7.5 NEL # overload.............................................................................................................................................................................................................. 122
DESIGNER'S HANDBOOK 4189340911K UK Page 4 of 521