REPORT TO COUNCIL
SUBJECT
Title
Action to Authorize the City Manager to Negotiate and Execute Agreements and/or Amendments to Existing Agreements as Required to Complete Emergency Transformer Replacement at Juliette Substation and Approve Related Budget Amendment
Report
BACKGROUND
The City of Santa Clara's Electric Utility, Silicon Valley Power (SVP), owns and operates the Juliette Substation (JUL), which provides electric service and power to Intel Corporation (Intel). Intel is one of SVP's largest customers, and the Intel campus connects to SVP's 60KV Northwest Loop.
SVP and Intel are interconnected between SVP's 12KV transformers and the customer's 12KV switchgear. Intel is responsible for maintaining their own switchgear and substation. As part of the electric system, SVP owns and is responsible for maintaining the 60KV Circuit Breakers and two (2) 60KV/12KV, 56MVA distribution transformers at JUL.
Intel's Request to Re-rate Existing Transformers
In 2022, Intel requested that SVP conduct a re-rating of the existing 56MVA transformers at JUL. Their requested rating is 62MVA, which represents a 10.7% increase.
These transformers were manufactured by the HK Porter Company in 1986. Delta Star Inc. (DSI) currently holds ownership of the design; therefore, SVP contracted with DSI to perform the re-rate study for the transformers located at JUL. Intel has or will pay for the study, the resulting inspections, and all the recommended upgrades.
In September 2022, DSI performed an initial inspection and assessment of the JUL transformers to determine whether they were in acceptable condition to be rated at a higher MVA. At that time, DSI informed SVP that the transformer inspection and field testing did not indicate any problem areas or concerns, and that the transformers could be re-rated to 62MVA. As a part of their deliverables, DSI also produced a re-rate engineering report, which outlined the new MVA rating for the existing JUL transformers, along wi...
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