“Draw a 2N data center UPS single-line with two 13.8 kV utilities, 2500 kVA 13.8 kV/480 V transformers, separate 480 V switchgear and 1 MW UPS paths feeding PDU A and PDU B, then a 1600 A static transfer switch and critical IT load.”
Read the decisions behind it.
Utility A and Utility B each feed a separate transformer, switchgear bus, and UPS.
Both transformers step 13.8 kV down to 480 V and are rated 2500 kVA.
UPS A feeds PDU A and UPS B feeds PDU B before the paths meet.
The 1600 A static transfer switch selects between the two PDU inputs for the critical IT load.
Use this one-line to explain a dual-path UPS topology with a static-transfer-fed load. Confirm capacity, maintenance bypasses, protection coordination, and the actual IT distribution design with the project engineer.
Other examples in this family.
Common questions
What does 2N mean in this UPS diagram?
It denotes two independent power paths, each capable of supporting the intended critical-load requirement when properly sized.
Why do the PDU paths meet at a static transfer switch?
The static transfer switch selects one PDU source for the depicted critical load rather than paralleling the two sources.
Are the two 1 MW UPS units automatically sufficient?
No. Their capacity must be checked against the critical load, power factor, redundancy target, battery runtime, and future growth.
Is this a switching procedure?
No. It is a one-line topology. Site-specific operating procedures require approved protection and commissioning information.