Appendix A – Non-Compumotor Motors

37
E-AC Drive Hardware Installation Guide
Scenario #2 — The resistance measurement to the second of the three
motor leads measures 50% of the resistance measurement to the third of
the three motor leads. Label the second motor lead A CENTER TAP (this is
the center tap lead for Phase A of the motor). Label the third motor lead A–.
Label the motor lead connected to the ohmmeter A+.
7. Repeat the procedure as outlined in step 6 for the three leads labeled B
(B CENTER TAP is the center tap lead for Phase B of the motor).
8. Proceed to the Terminal Connections section below.
8-LEAD MOTOR
Because of the complexity involved in phasing an 8-lead motor, you must
refer to the manufacturer’s motor specification document. Using the
manufacturer’s specifications, label the motor leads as shown in the next
drawing.
PM
Phase A Windings
Phase B Windings
1
2
3
4
21 43

8-Lead Motor – Labeling the Leads

You can configure the 8-lead motor in series or parallel.
Series Configuration Use the following procedure for series configura-
tions.
1. Connect A2 & A3 together and relabel this common point A CENTER TAP.
2. Connect B2 & B3 together and relabel this common point B CENTER TAP.
3. Relabel the A1 lead A+.
4. Relabel the A4 lead A–.
5. Relabel the B1 lead B+.
6. Relabel the B4 lead B–.
7. Proceed to the Terminal Connections section below.
Parallel Configuration Use the following procedure for parallel configu-
rations.
1. Connect motor leads A1 & A3 together and relabel this common point A+.
2. Connect motor leads A2 & A4 together and relabel this common point A–.
3. Connect motor leads B1 & B3 together and relabel this common point B+.
4. Connect motor leads B2 & B4 together and relabel this common point B–.
5. Proceed to the Terminal Connections section below.