상황
A hospital uses a 2.8 MW natural gas reciprocating engine CHP in parallel with a 13.8 kV utility service, transformed to 480 V to supply critical and normal hospital loads.
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01
CHP generator and utility feed a common 480 V switchgear bus through independent main breakers
02
13.8 kV utility service is stepped down to 480 V via a 3 MVA transformer
03
Separate breaker-protected feeders serve CHP auxiliary, chilled water plant, life safety critical, and normal hospital loads
Use for grid-parallel cogeneration or standby generation at hospitals, universities, or district energy plants where a common low-voltage bus supplies mixed critical and normal feeders.