Rockwell Automation Allen-Bradley PowerFlex 20P, Manual

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Rockwell Automation Publication 20P-TG004C-EN-P - September 2021
Chapter 2
Component Test Procedures
5.
With the digital multimeter set to “diode test”, measure each connection
point on the pulse transformer board listed in the tables below. If any of
the actual measurements are out of tolerance, replace the Pulse
Transformer board.
Table 8 - Armature Pulse Transformer Primary Measurements for Regenerative and Non-
Regenerative Drives
Table 9 - Armature Pulse Transformer Primary Measurements for Regenerative Drives
Check the Field SCR/Dual Diode Module
The field supply consists of a dual pack SCR/dual diode module arranged in a
single–phase full wave rectifier configuration. Malfunction of either of these
components may cause various responses including field and velocity related
faults, or blown fuses. The following procedures can be used if field bridge
malfunctions are suspected.
1.
Read the General Safety Precautions on page 10 .
2.
Remove power from the drive. See Remove Power from the Drive on page
44 .
3.
Remove the top and bottom control panel and I/O and control terminal
covers. See Protective Cover Removal and Installation on page
47 .
4.
Verify that contactor power (if used) is removed.
5.
Verify that power to an external field supply (if used) is removed.
6.
Disconnect the field wires from C1 and D1. See Bottom, Left Side of
Drive in
Figure 9 on page 36 .
For SCR (+) Meter Lead (-) Meter Lead Meter reading: Connector XY Pinout
1/01 XY-8 XY-1
0.41

4/04 XY-8 XY-4
2/02 XY-8 XY-2
5/05 XY-8 XY-5
3/03 XY-8 XY-3
6/06 XY-8 XY-6
For SCR (+) Meter Lead (-) Meter Lead Meter reading: Connector XY Pinout
1 XY-7 XY-1
0.41

4 XY-7 XY-4
2 XY-7 XY-2
5 XY-7 XY-5
3 XY-7 XY-3
6 XY-7 XY-6
10
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