Powered by Safety
®
25
01.4IB.46300
Installation
2. Join the clean contact surfaces by using the
hardware provided. The correct length of
bolt must be used in each joint to insure
that electrical clearances at bolt locations
are maintained. As a general rule, when
using 1/2" diameter bolts, the bolt should
be 1" longer than the combined thickness
of the copper bars being bolted together.
For example, if three 1/4"-thick copper bars
are to be connected, the bolt should be
1-3/4" long. In addition to proper length
bolts, the bolt assembly must include flat
washers, split lock washers, and nuts. All
hardware must be SAE Grade 5 or better.
Replace all barriers before reenergizing the
equipment. Failure to do so may result in
damage to the equipment and injury or death
to the operating personnel.
!
3. In some cases, external connections are
made to the equipment main bus by bars.
The equipment bars are normally silver
plated. Unplated bars, either copper or
aluminum should not be used to connect
to plated bars.
4. All field assembled primary conductor
joints and terminations must be insulated
for the operating voltage. There are two
methods of insulating joints: taping joints
or applying boots where applicable. A
detailed procedure for joint insulation is
described under Ch 4 Installation,
J. Main Bus Assembly Insulation.
Note: All hardware must be tightened to the
torque values listed in Table D, Bolt
Torque Values for Class E2 Medium
Voltage Controllers.
Figure 10 Ground Bus Splicing Configuration
a
b
c
d
a. / - 16 Hex Head Bolt
b. / Inch Flat Washer Type A
c. Horizontal Ground Splice Plate
d. Horizontal Bus Bar
Replace all barriers before reenergizing the
equipment. Failure to do so may result in
damage to the equipment and injury or death
to the operating personnel.
!
All exposed primary bus and cable joints and
connections should be insulated for the correct
system insulation rating.
To Next Page
Loading...
Need help?
General