70 Rockwell Automation Publication 20Y-TG001C-EN-P - April 2017
Chapter 6 Precharge Component Section
Test the Precharge Bridge by
Using the Power Structure
Terminals
To test the precharge bridge by using the power structure terminals, follow
these steps.
1. Remove power from the AFE.
See Remove Power from the AFE
on page 37.
2. If present, remove the protective barriers.
See Remove AFE Protective Barriers
on page 44.
3. To test the precharge bridge, measure the points on the power structure
that is listed in Ta b l e 6
.
Table 6 - Precharge Bridge Tests on Power Structure
Replace the Precharge
Bridge
To replace the precharge bridge, follow these steps.
1. Remove power from the AFE.
See Remove Power from the AFE
on page 37.
2. Open the power structure enclosure door.
3. If present, remove the protective barriers.
See Remove AFE Protective Barriers
on page 44.
4. Remove the protective front cover and terminal cover from the power
structure.
See Remove Protective Covers from the Power Structure
on page 46.
5. Remove the four Pozidriv screws that secure the bridge protective cover.
6. Remove the bridge protective cover.
Meter Leads Nominal Meter Reading Test Point Locations
+-
DC- L1 Value gradually rises to about 0.48V
(1)
(1) The actual voltage reading can vary depending upon your equipment. If your readings are not near 0.48V, verify that the
actual voltage that is measured is consistent for the power structure.
DC- L2
DC- L3
L1 DC+
L2 DC+
L3 DC+
L1 DC- Meter displays the charging voltage
L2 DC-
L3 DC-
DC+ L1
DC+ L2
DC+ L3
LI
+
-
L2
L3
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