Specifications

Core Software Operation
ADDvantage-32 PLUS ● AC to DC Power Converter
3-43
19) If any of the pulses are negative, switch the leads on the CT for that phase. If the
CT leads are difficult to reach, switch the wires for this CT at J1 of the SCR
Firing Adapter.
20) Return to step 14.
Figure 3-8. Firing Adapter 3-CT Configuration Diagram
2-CT Feedback Phasing Method:
21) The 2-CT feedback configuration wiring diagram and jumper settings for the
A20651 SCR Firing Adapter are shown in Figure 3-9. Check the polarity of the
feedback pulses across each burden resistor with the polarities indicated for each
CT with the polarities indicated for each CT in Figure 3-8. Example: Positive
pulses (Figure 3-4) should be observed for a CT when the scope probe is
connected to the CT + and scope ground to the CT -. Confirm these pulses at J1
of the SCR Firing Adapter, points (13-11) for CT1 and J1(13-15) for CT2. The C
polarities are most easily identified here.
22) Correct the CT polarities by switching the wire pair for the CT(s) whose feedback
pulses are inverted from those shown in Figure 3-5.
23) Return to step 14.