Rockwell Automation 2100 CENTERLINE Low Voltage Motor Control Centers User Manual
Page 76
76
Rockwell Automation Publication 2100-IN012E-EN-P - February 2012
Chapter 7 Final Checklist Before Energizing
8.
Check that the voltage and horsepower ratings on the motor correspond
with the MCC unit ratings.
9.
Check that the overload relays or heater elements are selected, installed
and/or adjusted to relative full load current shown on the motor rating
nameplate.
10.
For applications requiring power fuses, install the fuses in the fusible
switches in accordance with the NEC application requirements.
Refer to CENTERLINE Motor Control Centers Power Fuses Product
Data,
publication
for fuse information. Do not apply grease
or NO-OX-ID to fuse ferrules.
All fuses must be completely inserted in
the fuse clips. Recommended torque values for fuse clamp screws can be
found on the unit wiring diagram. Verify that all fuses fit each application.
11.
For circuit breaker applications, verify that the circuit breakers are in
accordance with NEC application requirements, and have correct
ampacity and trip settings.
Refer to MCC Instantaneous Trip Motor Circuit Protectors (MCP) in
Combination NEMA Starter, Soft Starter (SMC), and Variable Frequency
AC Drive Units Technical Data,
publicatio
, and MCC
Inverse Time Circuit Breakers in Combination NEMA Starter, Soft
Starter (SMC), and Variable Frequency AC Drive Units Technical Data,
for circuit breaker information in MCC units.
12.
Refer to the device instruction sheets or manuals supplied with the MCC
for specific start-up guidance. Component devices in MCC units such as
transfer switches, PFCCs, transducers, motor protectors, line monitors,
over and under-voltage relays, and motor windings heaters may require
unique start-up procedures. Set and verify adjustable current, voltage, and
other settings, according to device instructions or wiring diagrams.
Allen-Bradley AC drives and soft starter units are shipped with preset
factory settings such as ramp speed, current limits, switch positions, and
readouts. Preset factory settings may not be suitable for many applications.
Refer to instruction manuals, supplied with the MCC for specific startup
guidance.
IMPORTANT
High efficiency motors may have higher locked rotor and
inrush currents, therefore, higher magnetic trip settings than
those required equivalent standard motors may be required.
ATTENTION: Verify that the parameters of configurable devices,
such as drives, soft starters, and overload relays, are suitable for
the specific application and change them as needed for the
specific application.