“Draw a 480 V utility and 500 kW emergency generator feeding an 800 A automatic transfer switch, a critical-load bus, and two 200 A feeder breakers serving 100 A critical loads.”
図の背後にある意思決定を読み解く。
The 480 V utility and 500 kW emergency generator are the two inputs to ATS-1.
The 800 A ATS selects the source feeding the critical-load bus.
The ATS output feeds one labeled 480 V critical-load bus.
Two 200 A breakers leave the bus for separately labeled 100 A critical loads.
Use this as a compact backup-power topology for a facility with generator-supported critical loads. Perform load, fault-duty, protection, fuel-runtime, and code compliance studies for the actual project.
よくある質問
What does the ATS do?
The automatic transfer switch selects utility or generator power for the critical-load bus according to its control logic.
Can a 500 kW generator supply an 800 A ATS?
The ATS may be rated above the generator output. Verify the generator current, load demand, and fault ratings rather than comparing ratings alone.
Why are the critical loads behind 200 A breakers?
Separate breakers provide branch protection and isolation for each feeder from the common critical-load bus.
Does this show generator grounding?
No. Grounding and neutral switching depend on the system arrangement and require a project-specific design.