The scenario
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.
What is in this drawing
Read the decisions behind it.
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.
More like this
Other examples in this family.
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