Rockwell Automation 2364F Regenerative DC Bus Supply Unit (RGU) - Manual (Page 84)

Publication 2364F-5.01– October 2003
7-14 Installing Your RGU
9. If the optional ground-fault detection meter relay (VM2) is
supplied, verify that the meter is operating. Set the orange trip
voltage needle 50V higher than the maximum reading of the
black voltage indicator needle (200V maximum).
Note: The black voltage indicator needle should typically read a
low value (between 80 and 100V) when the inverters on the DC
bus are modulating. This voltage is produced by capacitively-
coupled currents to ground in the motor’s cables and windings.
10. Push the disconnect lever to off. Turn the start switch to off. Wait
until all stored energy has dissipated.
Connecting the RGU to the Drive
Lineup Splicing Busbars
Splice the RGU DC thru buses in the drive lineup, using the following
publications as applicable:
Testing the System Testing the System (Standalone RGU with Inverters)
For a stand alone RGU connected to inverters, first verify that the
door-mounted start switch is off and that all disconnects in the system
are open.
1. Push the RGU disconnect lever to on.
2. Turn the door-mounted start switch on. The RGU will begin the
precharge operation, charging its internal capacitor bank and the
capacitors in the inverters.
3. When the precharge sequence is finished (about 30 seconds), the
DC bus should be a little under the nominal voltage. At this
point, close the circuit breakers for the inverters and check their
operation.
4. Push the RGU disconnect lever to off. It may take a minute for
the DC bus voltage to go to zero.
5. Open all system circuit breakers.
Test Failures
If the RGU programming parameters are not set up properly, the RGU
may not operate as expected. If you are experiencing difficulty or
abnormal operation, check the parameters given in chapter 8 and test
the system again.
High Set Point Adjuster
(Under Black Cap)
Publication Enclosures
2300-5.1 Bulletin 2300 Family of Drive Systems Hardware–
Installation Manual Bulletin 2300 or Bulletin 2100
enclosures
S-3062 FD86N Enclosure Hardware–Installation Manual FD86N enclosures