Rockwell Automation Publication 6000-UM002E-EN-P - April 2018 11
Chapter 1
Introduction
Around the world, Allen-Bradley® PowerFlex® medium voltage drives from
Rockwell Automation have built a reputation for providing efficient and reliable
motor control for industry's most demanding applications. From the hardware
designed to help optimize production to the power of networked control
platforms, users can quickly and easily gain access to valuable information from
their systems. Better information leads to higher asset availability, reduced energy
and maintenance costs, and asset and personnel protection - all resulting in an
increased return on your investment and real bottom-line savings. No matter
where your applications are located - and whether your requirements are simple
or complex, count on PowerFlex medium voltage drives for the optimal solution.
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.
Table 1 - Line-to-Ground Short-circuit Specifications
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 outlined in Electrical Safety requirements for Employee Work places
must be followed. Before attempting any work, verify the system has been
locked out and tested to have no potential.
Attribute Value
Line-to-Ground short-circuit current 31.5 kA
Incoming circuit breaker withstand current short time 4 s
Ik ≥ 31.5 kA
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