Three-Phase AC Box - Phase Current Balancing - Active Enterprise Data Warehouse

6750 Platform Product and Site Preparation Guide

Product
Active Enterprise Data Warehouse
Published
March 2018
Language
English (United States)
Last Update
2018-04-18
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Product Category
Hardware
Phase currents are not balanced on three-phase AC feeder boxes. If you have more than one cabinet with the three-phase AC feeder box, you will need to rotate the phase connections on each outlet to minimize the aggregate site imbalance. Consult this table for how to connect the phases to the receptacle in order to rotate the phase connections.
With a three-phase Wye AC feeder box, the phase imbalance results in a current on the neutral wire.
Three-Phase AC Box Current Balancing
Cabinet # Phase #1 Phase #2 Phase #3
Cabinet #1 L1 L2 L3
Cabinet #2 L3 L1 L2
Cabinet #3 L2 L3 L1
Cabinet #4 L1 L2 L3
Cabinet #5 L3 L1 L2
Cabinet #6 L2 L3 L1
Cabinet #7 and so on and so on and so on