MSD Manual
3.0 Pre-Installation Planning
12
3.0 Pre-installation Planning
Verify the Application
Make sure that the MotorShield
™
is correct for the application. The voltage and current ratings of the
MotorShield
™
must match the output voltage and current ratings of the connected variable frequency
drive as it is configured for use with the connected motor. Follow NEC and local electrical codes and
regulations for selection and placement of drive and load cables.
Variable Frequency Drive Settings
Make sure that the variable frequency drive will be set for operation modes and ranges that are
compatible with the MotorShield Kit:
•
Maximum output frequency: 80 Hz
•
PWM switching frequency between 2 kHz and 12 kHz, ideally 4kHz to 8kHz
•
Mode of operation: “scalar” or “V/Hz” without DC braking unless the drive application has been
confirmed by TCI Technical Support
•
Consult VFD manual for other drive specific recommendations for use with sinewave filters,
specific instructions may include but are not limited to: Disable any variable PWM switching
frequency options and set drive to continuous 3-phase modulation.
Environment
Locating the MotorShield
™
in a suitable environment will help ensure proper performance and a
normal operating life.
Warning
Unless specifically labeled as approved for such use, this equipment is not suitable for use in
an explosive atmosphere or in a "Hazardous (Classified) Location" as defined in article 500
of the National Electrical Code (NEC).
Make sure that the installation location will not be exposed to corrosive or combustible airborne
contaminants, excessive dirt of liquids. The unit must be installed in an environment where it will
not be exposed to:
•
Corrosive liquids or gasses
•
Explosive or combustible gases or dust
•
Excessive airborne dirt and dust
•
Excessive vibration [0.152 mm (0.006 in) displacement, 1G peak]
Working Space
Provide sufficient access and working space around the unit to permit ready and safe installation,
operation and maintenance. Make sure that the installation conforms to all working space and
clearance requirements of the National Electrical Code (NEC) and/or any other applicable codes.
Provide sufficient unobstructed space to allow cooling air to flow through the unit.
The widest or deepest portion of the unit enclosure having ventilation openings must be a
minimum of six inches from adjacent walls or other equipment. Any enclosure sides that do not
have ventilation openings should be a minimum of three inches from adjacent walls or other
equipment.
Power Wiring
The conduit and wiring from the output of the variable frequency drive to the motor must be
routed to the MotorShield
™
and then to the motor. When selecting a mounting location for the
MotorShield
™
, plan for the routing of the power wiring.
Summary of Contents for MotorShield MSD0009A300
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