Rockwell Automation 20D PowerFlex 700H/S Frame 11 Replacement Power Structure - Manual (Page 8)

8 PowerFlex® 700S and 700H Frame 11 Replacement Power Structures
Step 2: Removing Power
From the Existing Drive
1. Turn off and lock out input power. Wait five minutes.
2. Verify that there is no voltage at the drive’s input power terminals.
3. Measure between the +DC and -DC terminals, between the +DC
terminal and the chassis, and between the -DC terminal and the chassis.
The voltage must be zero for all three measurements.
Step 3: Removing the Old
Power Structure Refer to the PowerFlex 700H/S Frame 11 Hardware Service Manual,
publication PFLEX-TG003
…
, for information about removing the power
structure.
Step 4: Installing the New
Power Structure Refer to the PowerFlex 700H/S Frame 11 Hardware Service Manual,
publication PFLEX-TG003
…
, for information about installing the power
structure.
!
ATTENTION: To avoid an electric shock hazard, verify that
the voltage on the bus capacitors has discharged before servicing
the drive. Check the DC bus voltage at the Power Terminal
Block by measuring between the +DC and -DC terminals,
between the +DC terminal and the chassis, and between the -DC
terminal and the chassis. The voltage must be zero for all three
measurements.
Remove power before making or breaking cable connections.
When you remove or insert a cable connector with power
applied, an electrical arc may occur. An electrical arc can cause
personal injury or property damage by:
•
sending an erroneous signal to your system’s field devices,
causing unintended machine motion
•
causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.
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