Liebert Series 600T installation manual Preferred Grounding Configuration, Power-Tie Systems

GROUNDING

ELECTRODE

PER NEC 250-24

GROUNDING

ELECTRODE

PER NEC 250-24

Figure 6. Preferred Grounding Configuration, Power-Tie™ Systems

7.6.Preferred Grounding Configuration, 480 or 600 VAC Input and Output, with Power-Tie™ Switchgear

Single Module Systems can be used with Power-Tie switchgear to provide dual critical load busses. The Power-Tie switchgear permits transferring critical loads from one critical bus to the other so that one UPS module and associated breakers can be de- energized for maintenance. Certain configurations of Power-Tie equipment also permit the operator to continuously parallel the output of the UPS modules.

In tied systems, each UPS module must have its neutral solidly connected to its own building service neutral and to the Power-Tie switchgear neutral. See Figure 6 above.

NOTE

It is essential to run a neutral connection between the tie switchgear and both UPS modules as shown in the illustration above.

Liebert Series 600T UPS, 65-225 kVA, Single Module 13