282 Rockwell Automation Publication 7000L-UM301F-EN-P - March 2020
Chapter 5 Component Definition and Maintenance
7. Reconnect the ring lugs.
8. Replace the bus bar and tighten into place.
Figure 234 - Line Terminals
Filter Capacitor Cabinet
Filter Capacitors
Filter capacitors are used on the motor side for all drives. The AFE Rectifier
option also includes filter capacitors on the line side. Refer to Figure 222
(Cabling Cabinet for 18 Pulse Rectifier), and Figure 221
(Cabling Cabinet for
AFE Rectifier).
The filter capacitors are three-phase four-bushing units and “oil-filled”. The
three-phase capacitors are comprised of internal single-phase units that are
connected in a Y configuration. The neutral point of the Y is connected to the
fourth bushing, which is accessible and can be used for neutral point voltage
measurement or other protection/diagnostics purposes. Depending on the drive
configuration, the fourth bushing may or may not be connected to circuitry. The
metal cases of the capacitors are grounded through a stud on the capacitor
housing.
The capacitors are equipped with internal “bleeding resistors” to discharge the
capacitor and reduce its voltage below 50V in 5 minutes when left disconnected.
A typical three-phase capacitor is shown in Figure 235
:
Customer Line Terminals
Current Transformers
Customer terminals shown for bottom cable entry. Terminals can be
removed and re-installed with orientation for top cable entry.
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