GE BUS1000, Instructions Manual

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5. HARDWARE DESCRIPTION
5-2 BUS1000 Busbar Protection GEK-98514B
5.2. PANEL MOUNTED RACKS
The racks provided separately for the installation of BUS1000 board mounted systems are standard, 19
inches wide and their dimensions are shown in figure 22.
The external connections are provided in terminal blocks mounted in the rear part of the rack.
The front cover is made up of plastic material and fits over the case making pressure over a rubber joint
located around the enclosure. This produces a tight proof sealing avoiding the entrance of dust. The
resetting of the targets is achieved without having to take off the cover, through pushbuttons.
The modules provided with the various protection functions are assembled vertically on the racks. Several
types of modules are available depending on their type of installation and extractability.
Name Description Modules
BBD Single bus differential protection (6 positions) 3 DDF
(figure 7.1) 1 DAL
1 DDI
1 DRD
3 DFI
1 DRS
BBR Input and output modules for additional positions, 6 DFI
Maximum: 12 positions per rack. 2 DRS
BZC latching auxiliary units for current switching 10 HLB100
in double bus systems. Maximum: 5 positions per
BTR Optional test rack for single or double bus systems 1 DPR
(figure 7.3) 2 HLB100
2 HLA100
BFR Supervision and breaker failure overcurrent relay 5 SFI
Maximum:5 positions per rack. (figure 7.4) 5 MFI
BAR Accessory functions 1 DTE
6 HLB100