6.3 Wye vs. Delta Connected Power Supply for Alternative EC Fans
Figure 6.1 Power Supply Requirements for 380V-575V Units: Acceptable
Figure 6.2 Unacceptable
NOTE: The 380-575 volt unit is designed to operate with Wye-connected power with a solidly grounded neutral. It will
not operate properly with Wye-connected power with high-resistance (or impedance) ground or with Delta-connected
power. A separate neutral wire is not required to be run to the Liebert® MCV Condenser.
Acceptable Power Supplies—380-575V Nominal Units
• 380-575V wye with solidly grounded neutral and 277V line-to-neutral
6 Electrical Connections Proprietary and Confidential ©2024 Vertiv Group Corp. 25
Vertiv™ Liebert® MCV Installer/User Guide
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