Reliance electric GV3000 Instructions Manual page 82

9-2
ATTENTION: Do not operate 200-400 HP drives with the outer and inner
cabinet doors open due to possible exposure to high voltage. Close the
!
outer and inner cabinet doors before putting the drive into run. Failure to
observe this precaution could result in severe bodily injury or loss of life.
Step 3. Verify that there is no voltage at the drive's input power terminals.
Step 4. Measure the DC bus potential with a voltmeter while standing on a
non-conductive surface and wearing insulated gloves (600V).
For 1-60 HP drives, measure the DC bus potential at the DC bus power
terminals. See figures 9.1 and 9.2.
For 60-100 HP drives, remove the top two screws of the Regulator panel and
tilt the panel forward. See figure 9.3. Measure the DC bus potential at the
diode bridge as shown. Reattach the Regulator panel.
For 100-150 HP drives, remove the top two screws of the Regulator panel
and tilt the panel forward. See figure 9.4. Measure the DC bus potential at the
bottom of the fuse holders on the Power Module Interface board on the back
of the Regulator panel. Take care not to touch any conductive traces.
Reattach the Regulator panel.
For 200-400 HP drives, measure the DC bus potential at the test points on
the Power Module Interface board. See figure 9.5. If it is necessary to open
the inner cabinet door, wait until the bus voltage is 50 VDC or less and then
measure the voltage on the DC bus bars as shown in figure 9.5. For
additional wiring information, refer to Appendix D.
Step 5. Once the drive has been serviced, reattach the drive's cover. On 200-400 HP
drives, close the inner and outer cabinet doors.
Step 6. Reapply input power.
GV3000/SE AC Drive Hardware Reference, Version 6.06