Prequalification_Questionnaire_for_Substation_Transformer_Procurement.docx

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PRE-QUALIFICATION-Purchase (6ea) 20/26/34MVA, 115/60-12. 47Y/7. 2kV Substation Transformers
Solicitation number
PQ197857
Issued by
Santa Clara County, California

About this file

This is a Pre-Qualification Questionnaire issued by the City of Palo Alto, California, for the procurement of six substation transformers rated at 20/26/34 MVA with voltage specifications of 115/60-12.47Y/7.2kV. The questionnaire serves as a preliminary evaluation tool to determine supplier eligibility before formal bidding occurs. Prospective vendors must complete all sections of the questionnaire, including supplier information, prequalification criteria responses, project references, and certification statements, and submit the completed document via the City's bid portal by the specified pre-qualification deadline. The questionnaire does not establish specific response or award dates but indicates that vendors will be notified by email regarding qualification status following the review and scoring of all submitted questionnaires.

The prequalification questionnaire contains 47 detailed evaluation criteria addressing supplier capabilities, quality management systems, manufacturing processes, testing procedures, design controls, workforce qualifications, and supply-chain management. Vendors must demonstrate compliance with ISO 9001 and ISO 45001 certifications, provide evidence of comparable municipal utility projects completed within the last ten years, document their logistics and shipment-protection procedures, and substantiate their thermal design, dielectric design, and short-circuit analysis methodologies. Submissions must include supporting documentation such as sample records, certifications, procedures, and photographs, with all responses executed under penalty of perjury. The questionnaire emphasizes that any omissions, misrepresentations, or failures to disclose information may result in disqualification and potential loss of eligibility to register as a public works contractor.

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CITY OF PALO ALTO

PRE-QUALIFICATION QUESTIONNAIRE

PQ197857 - Purchase (6 each) 20/26/34MVA, 115/60-12.47Y/7.2kV Substation Transformers

Directions: Complete all fields and questions as indicated and upload all required supporting documentation. Supporting documentation should be clearly labeled to cross-reference applicable Parts and Question numbers of the Questionnaire. If the City’s bid portal permits uploads by question, supporting documentation should be uploaded with the applicable question. If not, the proposer must submit one consolidated supporting documentation file with each document or section clearly cross-referenced to the applicable Parts and Question numbers. All responses must be legible. Execute as indicated, and create a PDF copy of the complete, signed Questionnaire, including supporting documentation, and submit via the City’s bid portal by the Pre-Qualification Deadline for the above-referenced project (“Project”).

PART A: SUPPLIER INFORMATION

Supplier Name:

Factory Location:

Electrical Design Location:

Mechanical Design Location:

FAT Test Laboratory Location:

Responsible Person for Questionnaire Completion :

Phone Number:

E-mail:

PART B: PREQUALIFICATION CRITERIA QUESTIONS

ID
QUESTION
Yes/No
1
Does the firm employ design engineers who can review/ interpret the technical specifications and respond to Customer inquiries in the specification's original written language?
2
Can the firm have the transformer seismic drawings reviewed and stamped by a California Licensed PE?
3
Does the firm provide training and assembly supervision in the United States and U.S.-based technical support for customer service issues?
4
Does the firm hold current ISO 9001 certification applicable to transformer design and manufacturing?
5
Does the firm maintain ISO 45001 certification or equivalent documented occupational health and safety controls?
6
Can the firm or an external laboratory perform all required in-process and final tests with adequate laboratory facilities/conditions?
ID
QUESTION
PROVIDE EXPLANATION AND/OR UPLOAD SUPPORTING DOCUMENTATION ON BID PORTAL
7
State the number of completed projects within the last 10 years involving City of Palo Alto design practices or comparable U.S. municipal utility approval processes. For each project, identify the owner, project name, transformer size/type, project dates, approval process, and contact for verification.
Provide Explanation and upload supporting documentation to bid portal:
8
Identify whether the transformer design manual is: (a) firm-developed, (b) licensed from an affiliate, or (c) licensed from a third party. State the number of years the manual has been in use, identify who controls updates, and provide version-control documentation.
Provide Explanation:
9
Provide the written procedure for controlling and approving design changes from the transformer specifications, whether initiated by the firm or customer, and identify the approval authority, customer notice/approval requirements, change log, document-control process, quality review, and record-retention requirements.
Provide Explanation and upload supporting documentation to bid portal:
10
State the number of power transformers that the firm has designed, manufactured, and factory tested within the last 10 years with a reactive-type on-load tap changer on the low-voltage side.
Provide Explanation:
11
Identify which of the following capabilities are performed in-house by the firm: field diagnostics; transformer oil/DGA analysis; factory repair of the firm's own transformers; factory repair of third-party transformers; on-site transformer maintenance/repair; and stated service capacity limits/limitations.
Provide Explanation:
12
Provide the documented logistics process the firm uses to deliver transformers to U.S. customers. The response must identify: (a) whether shipment is managed by the proposer or a named third-party logistics provider; (b) allocation of proposer and customer responsibilities by shipment stage; (c) the party responsible for customs/import compliance; and (d) the party responsible for inland transport to site.
Provide Explanation and upload supporting documentation to bid portal:
13
State whether the firm has each of the following shipment-protection controls for transformers: documented packaging/handling methods; a humidity-control procedure to achieve less than 0.5% humidity in the solid insulation at shipment; an accelerometer installation/shipping procedure; shipment-condition acceptance criteria based on recorded accelerations; a post-shipment/intermediate-move inspection process; and transportation-company selection/performance-evaluation criteria.
Provide Explanation:
14
State whether the firm has (a) a transport manual that requires pre-shipment photos, (b) a designated transport coordinator at the production center, and (c) a shipment-specific transport risk analysis/report process. Provide one sample manual and one sample risk analysis/report only as verification.
Provide Explanation and upload supporting documentation to bid portal:
15
State whether field assembly is performed by the firm's own personnel, qualified subcontractors, or both. Identify qualified subcontractors used within the last 2 years, the subcontracted scope, and which party leads site supervision.
Provide Explanation:
16
State the number and location of transformer manufacturing facilities, the age of each facility, the number of years the firm has manufactured power transformers, the reporting structure for manufacturing and R&D, and the named quality-management leads for supply, manufacturing, and testing.
Provide Explanation:
17
Identify (a) the legal entity that owns the transformer design to be used for this procurement; (b) the legal entity with authority to revise/update that design; (c) the design software tools and databases to be used and who controls them; (d) the scope and duration of any design or technology license; and (e) the number of continuous years the same technology platform has been used on qualifying comparable transformers.
Provide Explanation:
18
State the production equipment and tools that will be used for transformer assembly, the production capacity range of the facility, the maintenance programs in place for that equipment (corrective, preventive, predictive), and any planned capacity reduction or expansion during the procurement term. Also provide information on any planned expansion or reduction in the size of the manufacturing facilities that may occur during the term of this procurement.
Provide Explanation:
19
Provide the controlled workflow used for this procurement from tender through after-sales service and identify the responsible function or gate at each major stage: tender, design, procurement, manufacturing, testing, delivery, commissioning/startup support, and after-sales support.
Provide Explanation and upload supporting documentation to bid portal:
20
State whether the firm has each of the following quality-system controls: customer complaint intake/investigation; nonconformance and potential nonconformance tracking; root-cause analysis; corrective-action closure; verification of corrective-action effectiveness; and a two-year manufacturing deviation log with repeat-occurrence evidence. Provide one sample record only as verification.
Provide Explanation and upload supporting documentation to bid portal:
21
For power transformers manufactured during the last 36 months, provide: (a) the total number of units subjected to final factory testing and the number of units that failed one or more initial routine, special, or type test items requiring corrective action or retest; (b) the total number of units placed in service and the number of units with reportable warranty-period operating faults within 24 months after energization; (c) the annual rate for each metric for each of the last 3 calendar years and the combined 3-year average; and (d) the corrective action implemented for each failure category. Calculate each rate as affected units divided by total applicable units.
Provide Explanation:
22
State whether the firm has a documented employee training and qualification program that includes role-based qualification requirements, initial training, periodic refresher/requalification, training records, and qualification controls for special processes relevant to transformer manufacturing and testing.
Provide Explanation:
23
State whether the firm has each of the following supplier/subcontractor controls: qualification criteria; approval process; audit process and frequency; ongoing performance monitoring; performance questionnaires/metrics; and documented trend/corrective-action review over the last 3 years.
Provide Explanation:
24
Identify all transformer activities or sub-assemblies subcontracted by the firm, including any portion of transformer design performed by third parties, and state which critical design/manufacturing controls remain under the firm's direct control. Critical design elements and their associated calculations, specifications, and controlled drawings:

(a) core and magnetic-circuit design; (b) winding design; (c) insulation system and dielectric design; (d) thermal rating and cooling-system design; and (e) short-circuit/mechanical withstand design.

Provide Explanation:

25
State whether the firm has each of the following incoming-material controls: material receipt process; incoming inspection; material rejection/disposition control; material identification/traceability; review of supplier test reports; and calibration control for receipt inspection equipment. Provide the two-year supplier deviation log and corrective-action records only as verification.
Provide Explanation and upload supporting documentation to bid portal:
26
State whether the firm maintains material receiving records for each current-production transformer covering (a) bushings/LTC, (b) magnetic circuit materials, (c) insulation materials, and (d) tank/metal-construction items, and whether those records include lot traceability and receiving status control. Provide one sample record package only as verification.
Provide Explanation and upload supporting documentation to bid portal:
27
Provide the controlled storage procedure and supporting description for: (a) raw materials; (b) work-in-progress; (c) completed equipment; (d) the buildings/covered areas and environmental controls used for each storage stage; (e) the method used to control inventory location and storage status; and (f) photographs dated within 12 months before the proposal due date showing each storage area identified in the response.
Provide Explanation and upload supporting documentation to bid portal:
28
State the required long-term storage conditions for completed equipment, the maximum storage duration available at the production center, and, if off-site storage is used, the location and status of the storage agreement.
Provide Explanation:
29
Provide documentation of the workplace safety and cleaning plans including housekeeping, environmental conditions, PPE/CPE use, and guarding of rotating machine parts. State how long the plan has been in place.
Provide Explanation:
30
State whether the firm takes active-part measurements during assembly for (a) ratio, (b) losses, and (c) recurrent surge oscillograph (RSO), and whether records and acceptance criteria are maintained for those measurements.
Provide Explanation:
31
State whether the firm has a documented conductor-splicing method for the active part, qualified personnel/process controls for that method, and inspection/testing controls for the completed splice.
Provide Explanation:
32
State whether the firm verifies (a) losses; (b) dimensions; and (c) insulation on the magnetic circuit. State whether current-production records and acceptance criteria are maintained for those verifications, provide records.
Provide Explanation and upload supporting documentation to bid portal:
33
Provide the procedure for dielectric design of transformers and if the manufacturer has these capabilities: (a) documented conversion rules for equivalent DIL values; (b) an electric-field distribution calculation method used on comparable transformers; (c) defined allowable electrical-stress values for oil channels; (d) a documented basis for cellulose insulation permittivity values; and (e) a documented design-review process showing how the dielectric rules are applied.
Provide Explanation and upload supporting documentation to bid portal:
34
Provide the number of power transformers manufactured in the last 3 years that failed dielectric tests, with brief disposition and corrective action.
Provide Explanation:
35
Identify the final drying process used for transformer active parts, the monitored process parameters, the release criteria for completion of drying, and the maximum allowable elapsed time from completion of drying to start of vacuum filling.
Provide Explanation:
36
State the numerical acceptance criteria used for vacuum filling of power transformers, including: (a) minimum vacuum time; (b) maximum oil filling speed; (c) minimum impregnation/soak time; and (d) oil filtration or oil-quality acceptance limits required before release. Provide the controlled procedure revision number.
Provide Explanation and upload supporting documentation to bid portal:
37
State whether the firm maintains oil-analysis records for each transformer assembly, whether those records are traceable by date and transformer identifier, and whether release/acceptance criteria are used before assembly. Provide the most recent record only as verification.
Provide Explanation and upload supporting documentation to bid portal:
38
State whether the firm's short-circuit design method analyzes three-phase, phase-to-phase, and single-phase short-circuit cases and identifies the governing design case for the transformer.
Provide Explanation:
39
State the maximum allowable buckling stress the firm uses when the customer does not specify a value, state whether spacer effects are included in radial compressive stress/buckling evaluation, and identify the design basis for both.
Provide Explanation:
40
State whether the firm's sound-design method includes Preventative Auto sound, and state how many power transformers in the last 3 years were tested under load, no-load, and bridging tap positions to validate that method.
Provide Explanation:
41
State the total number of power transformers manufactured in the last 3 years, the number that failed temperature-rise tests, the resulting failure rate, and the software or method used to calculate the thermal performance of the transformer such as the winding gradient, winding hotspot rise, hottest points on the magnetic circuit, clamping components, and tank.
Provide Explanation:
42
State whether the firm uses differentiated maximum allowable copper-heating criteria for HV and LV windings, how hot-spot temperatures are calculated for all applicable operating modes, and how the hot-spot H coefficient is validated.
Provide Explanation:
43
State the average +/- variance in percentages between calculated temperature values and factory test results for temperature-rise tests on 20-30 MVA base transformers, using the firm's most recent comparable population and stating the sample size.
Provide Explanation:
44
State whether winding mandrels can be adjusted to match the cylinders used for this transformer class and whether spacers are manufactured/finished with smooth and rounded edges. State whether inspection criteria are used for each.
Provide Explanation:
45
Provide a current certification issued by an accredited independent laboratory for the anti-corrosion coating system proposed for this procurement. State whether the certification expressly covers: (a) blast preparation; (b) coating thickness; (c) adhesion; (d) color; (e) the specified coating system; and (f) use on transformer tanks and metal structures.
Provide Explanation and upload supporting documentation to bid portal:
46
State whether the firm maintains (a) welding drawings/weld maps or a weld book, (b) documented NDT procedures, (c) qualified NDT personnel/process controls, and (d) current-production NDT records with traceability.
Provide Explanation and upload supporting documentation to bid portal:
47
State the objective testing capability available for this procurement, including (a) the in-process and final test equipment available, (b) the capability limits of that equipment, (c) testing organization/staffing/shifts, (d) calibration program for production and test equipment. State the number of relevant 20-30 MVA base transformer tests performed within the last 10 years. Provide one sample test plan/report.
Provide Explanation and upload supporting documentation to bid portal:

NOTE: Omissions, misrepresentations and any failure to disclose associations with other firms or any prior history of alleged violations may lead to loss of your eligibility to register as a Public Works Contractor, disqualification of bids, and/or grounds for termination of a contract.

6056663

PART C: PROJECT REFERENCES

The City will use project references and supporting verification materials to verify Part B responses and identify material omissions or misrepresentations. Reference responses will not be separately scored unless the Scoring Directions identify the standardized questions, objective criteria, and how those responses will affect the bidder’s score or prequalification status.

Provide information about the firm’s three most recent completed transformers sold to a municipal utility in the United States. Names and references must be current and verifiable. Use separate sheets of paper that contain all of the following information*:

Transformer 1:

Project Name: ________________________________________________________________ Location: ____________________________________________________________________ Owner: ______________________________________________________________________ Owner Contact: (name and current phone number): ___________________________________ Engineering Contact (name and current phone number, if different from owner): ____________________________________________________________________________ Description of Project:

Date the Manufacturing of Transformer Commenced: __________________________________ Date of Manufacturing Completion: _________________________________________________ *In addition, you may also provide information about other projects that you have completed that are similar to the City’s project(s) for which you expect to bid using the same format.

Transformer 2:

Project Name: ________________________________________________________________ Location: ____________________________________________________________________ Owner: ______________________________________________________________________ Owner Contact: (name and current phone number): ___________________________________ Engineering Contact (name and current phone number, if different from owner): ____________________________________________________________________________ Description of Project:

Date the Manufacturing of Transformer Commenced: __________________________________ Date of Manufacturing Completion: _________________________________________________ *In addition, you may also provide information about other projects that you have completed that are similar to the City’s project(s) for which you expect to bid using the same format.

Transformer 3:

Project Name: ________________________________________________________________ Location: ____________________________________________________________________ Owner: ______________________________________________________________________ Owner Contact: (name and current phone number): ___________________________________ Engineering Contact (name and current phone number, if different from owner): ____________________________________________________________________________ Description of Project:

Date the Manufacturing of Transformer Commenced: __________________________________ Date of Manufacturing Completion: _________________________________________________ *In addition, you may also provide information about other projects that you have completed that are similar to the City’s project(s) for which you expect to bid using the same format.

PART D: CERTIFICATION

Questionnaires submitted by corporations must be signed with the legal name of the corporation, followed by the name of the state of incorporation and by the signature and designation of the chairman of the board, president or any vice president, and then followed by a second signature by the secretary, assistant secretary, the chief financial officer or assistant treasurer. All persons signing must be authorized to bind the corporation in the matter. The name of each person signing shall also be typed or printed below the signature. Satisfactory evidence of the authority of each officer signing on behalf of a corporation shall be furnished.

Questionnaires submitted by partnerships must furnish the full name of all partners and must be signed in the partnership name by a general partner with authority to bind the partnership in such matters, followed by the signature and designation of the person signing. The name of the person signing shall also be typed or printed below the signature.

Each person signing below makes the following representations under penalty of perjury:

The submitter of the foregoing answers to the questionnaire has read the same and the matters stated therein are true to the best of his or her own personal knowledge. This information is provided for the purpose of qualifying to bid on the Project, and any individual, company or other agency named herein is hereby authorized to supply the awarding body with any information necessary to verify the prospective bidder’s statements. By signing below, the submitter and the named contractor hereby grant permission to the City of Palo Alto, including its authorized staff or consultants, to contact any or all of the above listed persons or entities to confirm facts or otherwise investigate the above facts and issues.

The submitter understands that any statement which is proven to be false shall be grounds for immediate disqualification from bidding on the Project. The submitter whose signature appears below represents and warrants that he or she has authority to bind the named contractor.

I, (Name), the undersigned, am the (Title), with the authority to act for and on behalf of (Vendor Entity Name), declare under penalty of perjury under the laws of the State of California that the foregoing information provided in this Pre-qualification Questionnaire is true, full, and correct.

I understand that making a false statement may result in disqualification from bidding on City of Palo Alto procurements and may be grounds for termination of a contract.

Executed on this: day of at . (Date) (Month / Year) (City / State)

________________________________________________________________________
Signature of Vendor RepresentativeSignature of Vendor Representative

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