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 ............................................................................................... 2-12.2 Security .................................................................................................................... 2-42.3 Order codes............................................................................................................. 2-82.3.1 Order codes with enhanced CT/VT modules........................................................... 2-92.3.2 Order codes with process bus modules ..................................................................2-122.3.3 Replacement modules .....................................................................................................2-152.4 Signal processing ................................................................................................. 2-172.4.1 UR signal processing ........................................................................................................2-172.5 Specifications........................................................................................................ 2-192.5.1 Protection elements..........................................................................................................2-202.5.2 User-programmable elements ....................................................................................2-222.5.3 Monitoring..............................................................................................................................2-242.5.4 Metering..................................................................................................................................2-252.5.5 Inputs .......................................................................................................................................2-262.5.6 Power supply ........................................................................................................................2-272.5.7 Outputs....................................................................................................................................2-282.5.8 Communication protocols..............................................................................................2-302.5.9 Inter-relay communications..........................................................................................2-312.5.10 CyberSentry security.........................................................................................................2-322.5.11 Graphical front panel........................................................................................................2-322.5.12 Environmental......................................................................................................................2-332.5.13 Type tests ...............................................................................................................................2-342.5.14 Production tests ..................................................................................................................2-342.5.15 Approvals ...............................................................................................................................2-352.5.16 Maintenance.........................................................................................................................2-353 INSTALLATION 3.1 Unpack and inspect ............................................................................................... 3-13.2 Panel cutouts .......................................................................................................... 3-23.2.1 Horizontal units ..................................................................................................................... 3-23.2.2 Vertical units........................................................................................................................... 3-6