“Draw a university building single line diagram for a science laboratory with a 13.8 kV campus loop, 2000 kVA transformer, 480 V switchboard, 150 kVA research UPS, fume hood exhaust, process chiller, teaching lab, and analytical instrument feeders.”
看懂背後的決策。
A 13.8 kV loop feeds a dedicated 2000 kVA laboratory transformer.
Fume hood exhaust has a separate 400 A motor feeder.
A 600 A feeder supplies the research chiller.
A 150 kVA UPS feeds the instrument critical bus.
Teaching labs remain on a normal 300 A feeder.
Use this for a research or teaching laboratory building. Hazardous-process controls, emergency power, and lab equipment loads require further study.
常見問題
Why are analytical instruments on a UPS bus?
Sensitive instruments may need ride-through power during brief utility disturbances.
Why is fume hood exhaust separate?
It is a major safety-related mechanical load with its own feeder and controls.
Does the UPS power the chiller?
No. The high-demand process chiller remains on the normal switchboard in this example.