Rockwell Automation GV3000/SE V.6 Regulator Board 0-56921-6xx, 413338-6BU, 0-56940-6xx, 814.61.00 - Manual (Page 34)

5-2 GV3000/SE Drive Version 6 Regulator Board Installation Instructions
Some steps are only required if an option board, such as the AutoMax Network option
board, is installed. These steps are preceded by the text “Option board only.”
Unless otherwise indicated, keep all hardware that is removed. You will need it for
reassembly. This includes option boards, screws, lock washers, and rivets.
Important: Read and understand the warning labels on the outside of the drive
before proceeding.
Step 1. Shut Down the Drive
Step 1.1. Disconnect, lock out, and tag all incoming power to the drive.
Step 1.2. Wait five minutes for the DC bus capacitors to discharge.
Step 2. Verify That the DC Bus Capacitors are Discharged
Step 2.1. Use a voltmeter to verify that there is no voltage at the drive’s AC input
power terminals (R/L1, S/L2, T/L3).
Step 2.2. Ensure that the DC bus capacitors are discharged. To check
DC bus potential:
a. Stand on a non-conductive surface and wear insulated gloves.
b. Use a voltmeter to measure the DC bus potential at the DC bus power
terminals as shown in figure 5.1.
Figure 5.1 – DC Bus Voltage Terminals (30 to 100 HP @ 230 VAC and 75 to 200 HP @ 460 VAC Drives)
GND
V (T2)
U (T1)
W (T3)
R S T
DC Bus
Volts
P (+)
N (–)