American Power Conversion InfraStruXureTM System manual Close Cross-Tie

Start-Up Procedure: InfraStruXure System

Close Cross-Tie

1.If applicable, ensure A-B-C clockwise rotation at the bottom of the PDU cross tie output circuit breaker, using a phase rotation meter.

2. If applicable, verify that there is NO voltage present across the PDU cross tie circuit breaker, and that proper voltage is present on each side of the circuit breaker (208V, metered phase-to- phase), using a true RMS voltmeter.

There should be no voltage present across the Cross Tie Output circuit breaker.

Warning

3 . If applicable, set the PDU Cross-Tie Output (X) circuit breaker to ON.

Once the cross-tie output circuit breaker is closed, you can start the system to which the circuit breaker is tied. Repeat this start-up procedure for each InfraStruXure system.

64 InfraStruXure System—Installation and Start-Up