Rockwell Automation Liqui-Flo Trane Addendum - Manual (Page 27)

Connecting Cabinet Power Wiring 4-3
4.3 Installing Input Power Wiring (12-Pulse Rectifier
Cabinet)
Use the following steps to connect AC input power to the cabinet:
Step 1. Remove the top panel of the cabinet.
Important: Care must be taken to prevent debris from falling into the cabinet while
performing this installation.
Step 2. Drill the wire routing holes in the panel. Note that the wire routing hole
patterns shown in figure 3.4 are recommendations only. These wire routing
holes are the only entry points for input power wiring into the cabinet.
Step 3. Install the appropriate conduit hubs.
Step 4. Reinstall the cabinet’s top panel.
Step 5. Connect the three-phase 480 VAC input power leads to circuit breaker
terminals L1, L2, and L3. See figure 4.2 and Appendix A. Tighten these
connections to 23 ft-lb (+ 10%). Use only copper conductors for the input
power leads.
Step 6. Twelve-pulse cabinets require a delta-wye transformer be installed external
to the cabinet. Install the Trane-specified transformer by following the
installation instructions supplied with it.
Step 7. Connect the load side of the circuit breaker to the R, S, and T teminals on the
delta-wye transformer. Tighten these connections to 23 ft-lb (+ 10%).
Step 8. Connect the load side of the delta-wye transformer to the S1 through S6
terminals on the Liqui-Flo drive. Tighten these connections to 23 ft-lb
(+ 10%).
!
ATTENTION: The user is responsible for conforming with all applicable
local, national, and international codes. Failure to observe this precaution
could result in damage to, or destruction of, the equipment.