1412175446 Addendum 2.pdf
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- Solicitation number
- 1412175446
- Issued by
- Duval County, Florida
About this file
This is Addendum Number Two to RFP 1412175446 issued by the Jacksonville Electric Authority (JEA) Procurement Department for the procurement of Unit Auxiliary Transformers (UATs) for the St. Johns River Power Park (SJRPP) Unit 3 Combined Cycle project. The solicitation seeks the purchase of four transformers total: two Combustion Turbine Generator (CTG) UATs and two Steam Turbine Generator (STG) UATs. The addendum, dated June 3, 2026, addresses eight clarification questions submitted by potential bidders regarding transformer specifications, design requirements, and technical features. The proposal due date is June 23, 2026, at 12:00 PM EST, with an optional pre-response meeting held on May 26, 2026. The EPC LNTP (Lump Negative Target Price) date is referenced as February 2027, unless mutually agreed otherwise in writing by both parties. This addendum replaces the original Attachment C listing approved transformer manufacturers and provides critical design and operational clarifications necessary for proper bid submission.
The addendum clarifies that transformers must be designed with heavy-duty Generator Step-Up (GSU) capabilities despite their primary UAT classification, including compliance with IEEE C57.116 standards and bi-directional step-up and step-down operation capability. Transformers specified with an Inert Gas Pressure Oil Preservation System require ANSI 63 equivalent sudden/pressure fault relay protection rather than a Buchholz relay. Additional clarifications include confirmation that air termination compartments are required on the XV side, physical provisions for future online dissolved gas monitoring systems must be included in tank design, and transformers connecting to isolated phase bus must feature flanged throats for proper interface with the purchaser's isolated phase generator bus termination boxes. Dissolved gas-in-oil analysis testing is mandated as a service during factory acceptance testing at multiple stages. No pricing information, set-asides, funding sources, or incumbent contractor details are disclosed in this addendum document.
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Procurement Department Bid Section
June 3, 2026
ADDENDUM NUMBER: TWO (2)
TITLE: 1412175446 (RFP) JEA St. Johns River Power Park (SJRPP) Unit 3 Combined Cycle – Unit Auxiliary Transformers
PROPOSAL DUE DATE: June 23, 2026
TIME OF RECEIPT: 12:00 PM EST
THIS ADDENDUM IS FOR THE PURPOSE OF MAKING THE FOLLOWING CHANGES OR CLARIFICATIONS:
1. Addition: JEA adds “1412175446 Addendum 2 - Attachment C - All Approved Transformer Manufacturers_2026” document which replaces “1412175446 Attachment C - All Approved Transformer Manufacturers_2026” document.
2. Question: Per Data sheet16151. Transformer is a auxiliary transformer (UAT) but page 15 under Generation step up application , line 141, specify that the transformer should be designed for application of generating step-up.
Answer: The document explicitly clarifies that these units must be designed to handle the rigorous electrical and physical demands of both scenarios. Line 136 states that the "Transformer shall be suitable for both step-up and step-down operation". Furthermore, Line 142 notes that because the UATs are directly connected to the generator, they "may be subjected to load rejection conditions that result in an abnormally high voltage". Therefore, transformer manufacturer must design them as a Unit Auxiliary Transformer but with the heavy-duty capabilities required of a Generator Step-Up (GSU) application (such as complying with IEEE C57.116).
3. Question: Per Data sheet16151. Transformer type is step down but page 15 under general, line 136, specify that the transformer should be suitable for both step up and step down.
Answer: While the primary function listed in the datasheet scope is "Step Down" , Line 136 strictly requires that its structural and electrical design must be bi-directional: "Transformer shall be suitable for both step-up and step-down operation and the source of power to be assumed from HV, LV or tertiary windings (if existed)".
4. Question: Per Data sheet16151. Transformer should have a inter gas pressure system, however, under accessories, page 14, line 106 a Buchholz relay is required.
Answer: Per Section 16151 – Power Transformer Datasheet, the transformer is specified with an Inert Gas Pressure Oil
Preservation System, which corresponds to a sealed tank design without a conservator; therefore, a Buchholz relay is not required. The Transformer Manufacturer shall provide ANSI 63 equivalent protection using a sudden/fault pressure relay suitable for sealed tank design.
5. Question: Page 21, item 217. Please confirm if an air termination compartment is required.
Answer: Yes, ATC is required on XV side as mentioned in items 25-27 & 62-64.
6. Question: Page 23, line 250, is a gas monitoring system required?
Answer: No, a full online system is not immediately required to be supplied, but physical provisions for it must be built into the tank. Line 105 of the datasheet clarifies this by stating: "Provisions may be made for future installation of an online dissolved gas monitoring system". Line 250 further specifies that if it were explicitly requested, it would need visual and remote alarms , but the baseline requirement for this contract is to provide the "provisions" (valves/space) for future addition.
7. Question: Page 23, line 251, is a DGA system required?
Answer: Similar to previous question, an online, continuous DGA system monitor does not need to be supplied as a permanent hardware component. However, DGA testing is strictly required as a service during factory acceptance testing. Line 332 states that "Dissolved gas-in-oil analysis (DGA) shall be made at [various] stages" (before tests, before/after temperature rise tests, before/after dielectric tests, and after all tests).
8. Question: Page 11, line 25, the IPB to be provided by the IPB supplier? Therefore, is Flanged throat required?
Answer: Yes, a flanged throat is strictly required. While the note on Page 11 confirms " IPB to be provided by IPB supplier" , Line 374 explicitly dictates the transformer manufacturer's interface requirement: "Unit auxiliary transformers
(UAT) connecting to isolated phase bus shall have a flanged throat around each high voltage bushing for termination of
Purchaser's isolated phase generator bus termination box".
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