Rockwell Automation Publication 7000L-UM301F-EN-P - March 2020 427
Meggering Appendix C
conductor was not connected, the monitored low voltage signal could
then rise up to medium voltage potential which is a serious hazard that
must be avoided at all times. You must always ensure the ground
conductors on the VSB are securely connected before applying medium
voltage to the drive.
Output Grounding Network
Reconnect the ground connection on the OGN capacitor. The bolt
connection should be torque down to 3.4 Nm (30 lb-in). Exceeding the
torque rating of this connection may result in damage to the capacitor.
Tr ans i e n t Sup p r e ss i on Ne t wo r k
Re-install the fuses on the TSN.
ATTENTION: Failure to connect both ground connections on the voltage
sensing board will result in high potential in the Low Voltage cabinet
within the drive which will result in damage to the drive control and
possible injury or death to personnel.
ATTENTION: Failure to reconnect the OGN ground may result in the
neutral voltage offset being impressed on the motor cables and stator,
which may result in equipment damage. For drives that did not
originally have the OGN connected (or even installed), this is not a
concern.
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