Toshiba JK400 Series, Инструкция по эксплуатации

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Basic Installation and Operation Guide JK 400 Series Fixed Controllers
TOSHIBA
7
b. Ground leads should be
connected to cable
potheads/shields as
specified by the
manufacturer of these
devices.
Fig. 9 Ground Bus Splice
Medium Voltage Power Connections
Use a properly calibrated torque wrench to tighten all MV connections according
to Fig ures 10a and 10b.
Cable and wire bundles that enter the controller enclosure should be routed to
avoid interference with moving parts. Minimum bending radius for the typ e of
cable used should be observed.
Power cables should be braced and/or laced to withstand short circuit forces
wherever such cables are unsupported. Power cables should be adequately
sized to carry the motor full load current in accordance with NEC requirements,
and have an adequate voltage rating. Cables should be dressed and terminated
as appropriate to the voltage class and cable manufacturer’s recommendations.
Fig. 10a Torque Specs for
MV Power Connections
Main power bus (when provided) and horizontal ground
bus are supplied with links to join shipping sections
together. These should be installed in accordance with
Fig. 9 through Fig. 12. All access covers, barriers,
partitions, etc., that are temporarily removed during
installation must be replaced.
Fig. 10b Torque Specs for Bus Connections
Bolt Size
Torque at Full
Engagement
(ft - lbs)
1/4 - 20 6
3/16 - 18 12
3/8 - 16 18
7/16 - 14 30
1/2 - 13 45
9/16 - 12 68
5/8 - 11 90
3/4 - 10 150
7/8 - 9 240
1.0 - 8 245
Bolt Size
Torque at Full
Engagement
(ft - lbs)
Type of Connection
1/2 - 13 45 Bus - Bus
3/8 - 16
28 Bus - Bus
25 Bus - Glastic Ins.
18 Bus - Porcelain Ins.
5/16 - 18 15
M 12 35