GE Multilin
B90 Low Impedance Bus Differential System
3-1
3 HARDWARE
3.1 DESCRIPTION
3
3 HARDWARE 3.1DESCRIPTION
3.1.1 PANEL CUTOUT
The B90 Low Impedance Bus Differential System is available as a 19-inch rack horizontal mount unit with a removable
faceplate. The faceplate can be specified as either standard or enhanced at the time of ordering. The enhanced faceplate
contains additional user-programmable pushbuttons and LED indicators.
The modular design allows the relay to be easily upgraded or repaired by a qualified service person. The faceplate is
hinged to allow easy access to the removable modules, and is itself removable to allow mounting on doors with limited rear
depth.
The case dimensions are shown below, along with panel cutout details for panel mounting. When planning the location of
your panel cutout, ensure that provision is made for the faceplate to swing open without interference to or from adjacent
equipment.
The relay must be mounted such that the faceplate sits semi-flush with the panel or switchgear door, allowing the operator
access to the keypad and the RS232 communications port. The relay is secured to the panel with the use of four screws
supplied with the relay.
Figure 3–1: B90 HORIZONTAL DIMENSIONS (ENHANCED PANEL)
17.56”
[446,02 mm]
9.687”
[246,05 mm]
11.016”
[279,81 mm]
7.460
[189,48 mm
6.960”
[176,78 mm]
19.040”
[483,62 mm]
6.995”
[177,67 mm]
842807A1.CDR
Summary of Contents for B90
Page 10: ...x B90 Low Impedance Bus Differential System GE Multilin TABLE OF CONTENTS ...
Page 284: ...5 166 B90 Low Impedance Bus Differential System GE Multilin 5 8 TESTING 5 SETTINGS 5 ...
Page 334: ...10 8 B90 Low Impedance Bus Differential System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Page 338: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 460: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 476: ...E 10 B90 Low Impedance Bus Differential System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Page 502: ...viii B90 Low Impedance Bus Differential System GE Multilin INDEX ...