GE B90 User Manual

B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL iii
B90 Low Impedance Bus Differential System
Table of contents
1INTRODUCTION 1.1 Safety symbols and definitions ........................................................................... 1-1
1.1.1 General cautions and warnings .................................................................................... 1-1
1.2 For further assistance........................................................................................... 1-2
2PRODUCT
DESCRIPTION
2.1 Product description ............................................................................................... 2-1
2.2 Security .................................................................................................................... 2-4
2.3 Order codes............................................................................................................. 2-7
2.3.1 Replacement modules.....................................................................................................2-12
2.4 Signal processing................................................................................................. 2-13
2.4.1 UR signal processing ........................................................................................................2-13
2.5 Specifications........................................................................................................ 2-15
2.5.1 Protection elements..........................................................................................................2-16
2.5.2 User-programmable elements ....................................................................................2-17
2.5.3 Monitoring..............................................................................................................................2-18
2.5.4 Metering..................................................................................................................................2-19
2.5.5 Inputs .......................................................................................................................................2-19
2.5.6 Power supply........................................................................................................................2-20
2.5.7 Outputs....................................................................................................................................2-21
2.5.8 Communications ................................................................................................................2-23
2.5.9 Inter-relay communications..........................................................................................2-24
2.5.10 CyberSentry security.........................................................................................................2-25
2.5.11 Graphical front panel........................................................................................................2-25
2.5.12 Environmental......................................................................................................................2-26
2.5.13 Type tests...............................................................................................................................2-27
2.5.14 Production tests..................................................................................................................2-27
2.5.15 Approvals ...............................................................................................................................2-28
2.5.16 Maintenance.........................................................................................................................2-28
3 INSTALLATION 3.1 Unpack and inspect ............................................................................................... 3-1
3.2 Panel cutouts.......................................................................................................... 3-2
3.2.1 Rear terminal layout ........................................................................................................... 3-5
3.3 Wiring.......................................................................................................................3-7
3.3.1 Typical wiring ......................................................................................................................... 3-7
3.3.2 Dielectric strength..............................................................................................................3-13

GE B90 Specifications

General

Brand	GE
Model	B90
Category	Relays
Language	English