Safety precautions – Rockwell Automation 20B PowerFlex 700 Drive Components Replacement - Frame 8 User Manual
Page 12
12
Rockwell Automation Publication 20B-IN024C-EN-P - June 2012
Preface
Safety Precautions
The precautions and general installation requirements provided in the PowerFlex
700 Frame 7 . . . 10 Installation Instructions (publicati
) and the
PowerFlex 700 User Manual (publicati
ust be followed in
addition to those included here.
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. Check the DC bus voltage at the power terminals 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.
ATTENTION:
To avoid an electric shock hazard, ensure that all
power has been removed before proceeding. In addition, before
servicing, verify that the voltage on the bus capacitors has
discharged. Check the DC bus voltage at the Power Terminals by
measuring between the +DC & 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.