4
I.B. 8926-1A
RATINGS
Each Freedom 2100 Motor Control Center has a
rating nameplate attached to the door of the top
horizontal wireway of the primary section. See
Figures 1 and 2. This nameplate shows the general
order number under which the motor control center
was built and its continuous electrical ratings, in
terms of incoming line voltage, phases, and
frequency, and ampere ratings of the horizontal bus
and the vertical bus for each section. In addition, this
nameplate shows the passive short-circuit
(withstand) rating of the horizontal and vertical bus
system.
The active short-circuit (interrupting) ratings of the
main and unit short-circuit protective devices are
shown on labels attached to the inside of each unit.
Before installing a motor control center, calculate
and record the fault current available at the incoming
line terminals. Verify that the short-circuit withstand
and short-circuit interrupting ratings of the units in
the motor control center are appropriate for the fault
current available.
QUALIFIED PERSONNEL
Individuals who install, operate or maintain motor
control centers must be trained and authorized to
operate the equipment associated with the
installation and maintenance of a motor control
center, as well as the operation of the equipment
that receives its power from controller units in the
motor control center.
Such individuals must be trained in the proper
procedures with respect to disconnecting and
locking OFF power to the motor control center,
wearing protective clothing and equipment, and
following established safety procedures as outlined
in the
National Electrical Safety Code(ANSI C2)
and
Electrical Equipment Maintenance(NFPA
70B).
Part 2
RECEIVING, HANDLING, AND STORAGE
RECEIVING
Before and after unloading the motor control center,
inspect each section and unit exterior for evidence of
damage that may have been incurred during
shipment. If there is any indication that the control
center has been mishandled or shipped on its back
or side, remove the drawout units and make a
complete inspection of the internal structure, bus
bars, insulators and unit components for possible
hidden damage. Report any damage found to the
carrier at once.
HANDLING
The following guidelines are provided to help avoid
personal injury and equipment damage during
handling, and to facilitate moving the motor control
center at the job site.
GENERAL HINTS
1. Handle the motor control center with care, to
avoid damage to components and to the
enclosure or its paint finish.
2. Keep the motor control center in an upright
position.
3. Insure that the moving means has the capacity
to handle the weight of the motor control center.
4. The control center should remain secured to the
shipping skid until the motor control center is in
its final location.
5. Exercise care during any movement and
placement operations to prevent falling or
unintentional rolling or tipping.
6. Lifting angles for handling by overhead crane
are bolted to the top of each shipping section.
Handling by overhead crane is preferable but
when crane facilities are not available, the motor
control center can be positioned with a fork-lift
truck or by using rollers under the shipping skid.
OVERHEAD CRANE
1. See Figure 3 for recommended lifting
configuration.
2. Select or adjust the rigging lengths to
compensate for any unequal weight distribution,
and to maintain the motor control center in an
upright position.
3. To reduce tension on the rigging and the
compressive load on the lifting angles, do not
allow the angle between the lifting cables and
vertical to exceed 45 degrees.
4. Use slings with safety hooks or shackles.
Do
not pass ropes or cables through lifting
angle holes.
Содержание Freedom 2100 Series
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