CITY COUNCIL AGENDA ITEM
ACTION REQUESTED:
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Approve the award of Cooperative Procurement 24-270, Tollway Substation 34.5kV Indoor Switchgear, to Wesco, Inc. for an amount not to exceed $3,827,000
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DEPARTMENT: Electric Utility
SUBMITTED BY: Brian Groth, Director
BOARD/COMMISSION REVIEW:
N/A
BACKGROUND:
To support the City's priority to provide infrastructure, electric service, and water / wastewater services that are reliable and safe, the Naperville Electric Utility (Utility) has initiated a multi-faceted, multi-year project to improve system reliability at the Tollway Substation. The project includes a new transformer and new 35kV switchgear and breakers that will be installed inside a new building.
The Tollway Substation currently operates outdoor 35kV breakers and outdoor bus along the north side of the substation. The 35kV circuits from the Tollway substation serve large customers, including Nokia; and feed thousands of customers via providing feeds to the Odgen, Jefferson, Chicago, and Washington Substations. The circuit to the Washington Substation is one of the two feeds to Edward Hospital.
Circuit breakers are a major component of the 35kV sub-transmission system. Their purpose is to trip/open under the control of a relay to interrupt power flow. This occurs when there is a system problem or when directed by a system controller to isolate parts of the system for safety.
Salt spray and icing on insulators during the winter season have twice caused major outages. Due to age and exposure to the elements, the 35kV outdoor bus at the Tollway Substation are nearing their planned life expectancy and must be replaced.
DISCUSSION:
Utility staff, supported by Sargent and Lundy (Consultant), developed a technical specification for the 35kV indoor switchgear and circuit breakers.
Wesco has proposed AVAIL Switchgear Systems (Oshkosh, WI) for the switchgear manufacturer and Hyundai 38kV circuit breakers. The Utility currently has Hyundai circu...
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