Electrical Installation; System Grounding - Baldor ID15J1F50-ER Installation And Operating Manual

Mounting Instructions: For clearance mounting holes
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Electrical Installation

Interconnection wiring is required between the motor control, AC power
source, motor, host control and any operator interface stations. Use listed
closed loop connectors that are of appropriate size for the wire gauge being
used. Connectors are to be installed using crimp tool specified by the
manufacturer of the connector. Only Class 1 wiring should be used.

System Grounding

Baldor Controls are designed to be powered from standard three phase lines
that are electrically symmetrical with respect to ground. System grounding is
an important step in the overall installation to prevent problems.
The recommended grounding method is shown in Figure 3-1.
Ungrounded Distribution System
With an ungrounded power distribution system it is possible to have a
continuous current path to ground through the MOV devices. To avoid
equipment damage, an isolation transformer with a grounded secondary is
recommended. This provides three phase AC power that is symmetrical with
respect to ground.
Input Power Conditioning
Baldor controls are designed for direct connection to standard three phase
lines that are electrically symmetrical with respect to ground. Certain power
line conditions must be avoided. An AC line reactor or an isolation
transformer may be required for some power conditions.
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MN715J
Locate a flat 4" wide x 5.5" minimum high mounting surface. Material
should have sufficient thickness (14 gauge minimum).
Place the template on the mounting surface or mark the holes as shown
on the template.
Accurately center punch the 4 mounting holes (marked A) and the large
knockout (marked B).
Drill four #19 clearance holes (A).
" knockout center (B) and punch using the manufacturers
Locate the 1- 1 /
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instructions.
Debur knockout and mounting holes making sure the panel stays clean
and flat.
Apply RTV to the 4 holes marked (A).
Assemble the keypad to the panel. Use 8-32 screws, nuts and lock
washers.
From the inside of the panel, apply RTV over each of the four mounting
screws and nuts. Cover a
sure to completely encapsulate the nut and washer.
If the feeder or branch circuit that provides power to the control has
permanently connected power factor correction capacitors, an input AC
line reactor or an isolation transformer should be connected between the
power factor correction capacitors and the control.
" area around each screw while making
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Receiving and Installation 3-3