Rockwell Automation Publication 750-TG101A-EN-P - June 2022
11
Chapter
1
Before You Begin Tests, Maintenance, or Repairs
This chapter provides safety-related information about the maintenance and
repair of drives.
Product Advisories
Read these precautions before you begin to test components, perform
maintenance, or repair the drive.
In this manual, this image identifies Electrostatic Discharge
(ESD) sensitive parts. Take static control precautions when
you install an assembly that is identified as ESD sensitive.
IMPORTANT
Once the product is connected to a power supply, always verify that
system power is not present before performing any work on the product.
See safety-related practices that are contained in the publication NFPA
70E, Standard for Electrical Safety in the Work Place.
Qualified Personnel
ATTENTION:
Only qualified personnel familiar with PowerFlex® 755TS products
and associated machinery should plan or implement the installation, startup, and
subsequent maintenance of the system. Failure to comply can result in personal
injury and/or equipment damage.
Personal Safety
ATTENTION:
To avoid an electric shock hazard, verify that the voltage on the bus
capacitors has discharged before servicing. Measure the DC bus voltage at the
power terminal block by measuring between the +DC and –DC terminals. Also,
measure between the +DC terminal and the chassis, and between the –DC
terminal and the chassis. The voltage must be zero for all three measurements.
See Remove Power from the System on page
for terminal locations.
ATTENTION:
Potentially fatal voltages can result from improper usage of an
oscilloscope and other test equipment. The oscilloscope chassis can be at a
potentially fatal voltage if not properly grounded. If an oscilloscope is used to
measure high-voltage waveforms, use only a dual channel oscilloscope in the
differential mode with X 100 probes. It is recommended that the oscilloscope is
used in the A minus B Quasi-differential mode and the oscilloscope chassis is
grounded to an earth ground.
Product Safety
ATTENTION:
This drive contains ESD (Electrostatic Discharge) sensitive parts and
assemblies. Static control precautions are required when you install, test, service,
or repair this assembly. Component damage can result if ESD control procedures
are not followed.
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