Rockwell Automation GV3000/SE, VTAC 7 Super Remote Meter Interface Board M/N 2SI3000 M/N 2SI3000E - Manual (Page 31)

Installation 3-17
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 1.3 VTAC 7 drives: Open the drive’s outer cabinet door.
Important: Read and understand the warning labels on the inside of the drive before
proceeding.
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 or U/T1, V/T2, W/T3).
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 shown in figure 3.7.
Figure 3.7 – DC Bus Voltage Terminals (30 to 100HP @ 230VAC and 75 to 200HP @ 460VAC)
GND
V (T2)
U (T1)
W (T3)
R S T
DC Bus
Volts
P (+)
N (-)