6
Section 4 – Installation
4.0
Joining BreakMaster Enclosures
4.0.0
Access to BreakMaster Vertical Sections Containing Switches
Each BreakMaster load interrupter switch is shipped from the factory in the closed position to maintain alignment
during shipping and handling. The safety interlocking prevents opening of the door of the vertical section when the
switch is closed. In order to gain access to the interior, be sure the switchgear is on a true and level surface. To
open a manually operated BreakMaster switch, pull the release button and rotate the handle to the open position.
When handling the BreakMaster enclosure and moving switches, be sure the switches are in the closed position. Do
not operate switches unless they are setting on true and level surfaces.
4.0.1
Identification of Shipping Splits
Refer to the front view drawing. Below this drawing, shipping splits will be identified in relation to group numbers
for each cubicle. Normally shipping sections will not exceed 90 inches in width.
4.0.2
Procedures for Joining BreakMaster Enclosures at Shipping Splits
The joining of sections consists of 2 bolted connections on the top and bottom of each depth frame member. In
addition, 2 bolted connections are made on each vertical frame member. The vertical connections are located
1
⁄
3
and
2
⁄
3
up from the bottom of the BreakMaster Load Interrupter Switch (if 90” high switch, then connections are
made at 30” and 60” off the ground).
Make any main and ground bus connections using splice plates and hardware furnished. Bus bars are usually tin
or silver plated. To insure a proper electrical connection, care should be taken to protect the plating from
damage. DO NOT use joint compound.
4.1
Connection of Switchgear to Transformer
4.1.1
Indoor Assemblies
Holes are pre-drilled in the side of the BreakMaster structure to match holes provided in the transformer.
4.1.2
Outdoor Throat Connection
a. Switch and transformer should be brought together to give spacing of
1
⁄
2
inch between throat flanges.
b. Apply double bead of caulking material supplied with Breakmaster switchgear to outside surfaces of
both flanges.
c. Move switch and transformer together to compress caulking material.
WARNING
Wipe surfaces with clean, dry cloth to clean.
Cleaning bus joints with abrasive or chemical cleansers may
remove plating, which may cause joint overheating.
!
BreakMaster Load Interrupter Switch
