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Installation
FlexTrol™ Class E2 Medium Voltage Controllers with
Eaton Contactor
Table D Bolt Torque Values for FlexTrol™
Bolt
Dimensions
(inches)
Bolt
Head
Torque
Ft-Lbs Kg-M
5/8
55-70 7.6-9.7
1/2
35-50 4.8-6.9
3/8
20-30 2.8-4.2
1/4
5-7 0.7-0.97
Note: The bolt head drawings in the table
above are not to scale. Locate the
Bolting Torque label on equipment for
an accurate drawing of bolt sizes.
J. Main Bus asseMBly insulation
To insulate the main bus assembly, remove the
rear compartment covers. Assemble the splice
plates and bus bars by following assembly
instructions given in Ch 4 Installation,
I. Connections. All hardware must be tightened
to the torque values listed in Table D, Bolt Torque
Values for Class E2 Medium Voltage Controllers.
The operating temperature of conductors
in the switchgear may reach 105˚C. Any
insulating material used in the switchgear
must be suitable for this temperature.
To provide adequate bus joint insulation, use
any of the following methods:
• Wrapping bus joints, using tape or heat
shrink material
• Applying PVC (polyvinyl chloride) boots
k. incoMing power connections
Incoming power connections to the main bus
may be connected in various configurations
depending on the equipment application.
Review the elevation drawings delivered with
the equipment for site-specific connection
details.
Note: Refer to site-specific project drawings
for recommended and available conduit
space for top or bottom access.
1) Wrapping Bus Joint
Wrapping of joints with insulating tape is
an acceptable alternative to booting the
bus conductor joints. For some complex
or unusual joints, the formed bus boots
described above may not be available. Bus
conductor joints to be tape wrapped must
use the following procedure to maintain
proper insulation characteristics within the
switchgear.
Table E Bus Wrapping Components
Part Number Description
0282A3529 P004 2” wide tape
0282A3529 P005 4” wide tape
0282A3529 P008 Electrical grade rubber based (RB)
putty
Note: Electrical grade RB putty will be used
only when required to grade voids
and smooth out sharp edges of joints
and pothead, terminator or entrance
bushing connections.
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