Rockwell Automation Publication 6000-TG100A-EN-P - September 2020 13
Chapter 1 Before You Begin Tests, Maintenance, or Repairs
Safety Considerations
Lockout and tagout the device feeding power to the input of the drive before
performing any drive maintenance or component replacements. After the
input device cabinet doors are opened, immediately test the outgoing power
cables feeding the drive with a live-line tool (hot stick) while wearing high-
voltage gloves. Repeat the live-line tool (hot stick) testing at the drive incoming
line power cable connections to verify that medium voltage is not present. Pay
special attention to any capacitors connected to medium voltage that can
retain a charge for a period of time. Only after the drive equipment has been
verified as isolated and de-energized can subsequent work be performed. Even
though the input to the drive may be open, it is still possible for hazardous
voltage to be present.
See national and local safety guidelines for detailed procedures on how to
isolate the equipment from hazards safely.
Remove Power from the
System
Follow the appropriate procedures to remove power from the drive system.
1. Turn off and lockout all input power, including any external power
sources.
2. Wait 15 minutes.
SHOCK HAZARD: Energized industrial control equipment can be dangerous.
Severe injury or death can result from electrical shock, burn, or unintended
actuation of control equipment. Hazardous voltages may exist in the drive
cabinet even with the input circuit breaker in the off position. If it is
necessary to work in the vicinity of energized equipment, the safety-related
work practices that are outlined in Electrical Safety requirements for
Employee Work places must be followed. Before attempting any work, verify
that the system has been locked out and tested to have no potential.
Table 1 - Line-to-Ground Short-circuit Specifications
Attribute Value
Line-to-Ground short-circuit current 31.5 kA
Incoming circuit breaker withstand current short time 4 s
Ik ≥ 31.5 kA
Opening time 40...60 ms
Breaking time 50...75 ms
Inrush current Inverter input current x 4 or Inverter input current x 5
ATTENTION: The national and local electrical codes outline provisions for
safely installing and working on electrical equipment. Installation must
comply with specifications regarding wire type, conductor sizes, branch
circuit protection, and disconnect devices. Failure to do so may result in
personal injury and/or equipment damage.
WARNING: Remove power before you remove or make cable connections.
When you remove or insert a cable connector with power applied, an electric
arc can occur. An electric arc can cause personal injury or property damage in
theses ways:
• An electric arc can send an erroneous signal to system field devices, which
can cause unintended machine motion
• An electric arc can cause an explosion in a hazardous environment
Electric arcs cause excessive wear to contacts on both the module and its
mating connector. Worn contacts can create electrical resistance.
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