Rockwell Automation 7000 PowerFlex Medium Voltage Air-Cooled (B Frame) Installation - ForGe Control - Manual (Page 74)

74 Rockwell Automation Publication 7000-IN007E-EN-P - June 2014
Appendix A General Reference
Preventative Maintenance
Schedule Rockwell Automation recognizes that following a defined maintenance schedule
improves your drive’s performance and operational lifespan. By rigorously
following this maintenance schedule, you can expect the highest possible uptime.
Annual maintenance includes a visual inspection of all drive components visible
from the front of the unit, resistance checks on the power components, power
supply voltage level checks, general cleaning and maintenance, checking of all
accessible power connections for tightness, and other tasks. These tasks are
described in detail in publication
7000-UM202_-EN-P .
Encoder Usage When is an Encoder Required?
An encoder is required under the following conditions:
1. When speed regulation accuracy must be between 0.01...0.02% of nominal
speed.
2. When the zero speed breakaway torque needed is greater than 90% of
continuous running torque.
3. When continuous running speed is greater than or equal to 0.1 Hz, but less
than 6 Hz.
4. For minimizing restart times using the flying start capability in forward or
reverse direction.
5. At any time when high performance torque or speed control mode
(HPTC) is enabled.
I – Inspection This indicates that the component should be inspected for
signs of excessive accumulation of dust/dirt/etc. or
external damage (e.g. looking at Filter Capacitors for
bulges in the case, inspecting the heat sinks for debris
clogging the air flow path, etc.).
M – Maintenance This indicates a maintenance task that is outside the
normal preventative maintenance tasks, and can include
the inductance testing of Line Reactors/DC Links, or the
full testing of an isolation transformer.
R – Replacement This indicates that the component has reached its mean
operational life, and should be replaced to decrease the
chance of component failure. It is very likely that
components will exceed the design life in the drive, and
that is dependent on many factors such as usage, heating,
etc.
C – Cleaning This indicates the cleaning of a part that can be reused,
and refers specifically to the door-mounted air filters in
the liquid-cooled drives and some air-cooled drives.
Rv – Review This refers to a discussion with Rockwell Automation to
determine whether any of the enhancements/changes
made to the Drive Hardware and Control would be
valuable to the application.
RFB/R – Refurbishment/Replacement The parts can be refurbished at lower cost OR the parts
can be replaced with new ones.