E M A X LI N K 2 A B B R E V I ATE D
LV S W I TC H G E A R A P P L I C AT I O N G U I D E
11
Vertical distribution busbar
There are three standard vertical busbar types: full,
three-quarters and half distribution busbars. All
are located inside the busbar compartment. These
busbars are arranged in A-B-C order from left to
right.
Vertical Bottom/Full Distribution Busbar
Device compartment
Each device compartment is divided vertically into
four locations, A through D. Locations A, B, C or D
may contain feeders, equipped space, control or
blank. Location B or C may contain main, tie,
feeders or equipped space feeders. Location D may
contain main, feeder or equipped space feeders.
Standard breaker unit instruments installed on the
doors are pilot lights, push buttons, control
switches and maintenance switches.
In addition to the standard items listed above,
instrument compartments may also include
ammeters, voltmeters, high-resistance grounds
(HRGs), potential transformers and relays. These
instruments can be installed inside the
compartments or on the front of the instrument
compartment door.
Section and location numbering
Each section is sequentially numbered as the
general arrangement drawings are prepared. The
left-most section is usually section 1, the next
section to the right is 2, etc. This numbering
scheme ensures the correct sequencing of vertical
sections during installation.
The combination of the numeric section code (1, 2,
3, etc.) with the vertical level designation (A, B, C,
and D) uniquely describes each device’s location in
the switchgear. For example, the device mounted in
the top of the first section of a lineup would be
coded 1-A.
Device location numbering
(A and B locations can be combined; C and D
locations can be combined)
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Assembly construction
