B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL iiiB30 Bus Differential SystemTable of contents1 INTRODUCTION 1.1 Safety symbols and definitions ..................................................................... 1-11.1.1 General cautions and warnings .................................................................................... 1-11.2 For further assistance .................................................................................... 1-22 PRODUCTDESCRIPTION2.1 Product description......................................................................................... 2-12.1.1 Overview................................................................................................................................... 2-12.2 Security.............................................................................................................. 2-42.3 Order codes ...................................................................................................... 2-82.3.1 Order codes with enhanced CT/VT modules........................................................... 2-82.3.2 Order codes with process bus modules ..................................................................2-112.3.3 Replacement modules .....................................................................................................2-142.4 Signal processing........................................................................................... 2-172.4.1 UR signal processing ........................................................................................................2-172.5 Specifications ................................................................................................. 2-192.5.1 Protection elements..........................................................................................................2-192.5.2 User-programmable elements ....................................................................................2-222.5.3 Monitoring..............................................................................................................................2-232.5.4 Metering..................................................................................................................................2-242.5.5 Inputs .......................................................................................................................................2-252.5.6 Power supply ........................................................................................................................2-262.5.7 Outputs....................................................................................................................................2-272.5.8 Communication protocols..............................................................................................2-292.5.9 Inter-relay communications..........................................................................................2-302.5.10 CyberSentry security.........................................................................................................2-312.5.11 Environmental......................................................................................................................2-312.5.12 Type tests ...............................................................................................................................2-322.5.13 Production tests ..................................................................................................................2-322.5.14 Approvals ...............................................................................................................................2-332.5.15 Maintenance.........................................................................................................................2-333 INSTALLATION 3.1 Unpack and inspect......................................................................................... 3-13.2 Panel cutouts.................................................................................................... 3-23.2.1 Horizontal units ..................................................................................................................... 3-23.2.2 Vertical units........................................................................................................................... 3-3