상황
Industrial facility with 480V utility and 750 kW diesel generator uses a service entrance rated ATS to transfer critical loads between normal and emergency power.
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01
Service entrance rated ATS acts as the facility service disconnect
02
Generator and utility share 480V to simplify switching
03
Critical loads are fed from a dedicated 480V bus with dedicated breakers
04
Fire pump motor is placed on the critical bus for life-safety continuity
Use for industrial backup power single-line diagrams where a service entrance rated ATS is required and 480V critical loads must be backed up.