KEYS_Bid_11-25_Addendum_1.pdf

KEYS BID 11-25 SPECIFICATIONS FOR PURCHASE OF AUTOTRANSFORMER

Addendum 1

In the event of any conflict between the terms of this Addendum and the original bid, the terms of this Addendum shall control.

The “SPECIFICATIONS” are amended as follows. Please refer to the revised bid specifications attached herein.

The “PROPOSAL PAGES” are amended as follows. Please use the revised proposal pages attached herein.

Attachments:

1. Revised Bid Specifications

2. Revised Proposal Pages

GENERAL

Keys Energy Services (KEYS) is a municipal electric utility supplying power to residents of the lower Florida Keys. KEYS is located in the extreme southern tip of peninsular Florida, situated in Monroe County, Florida, primarily what is considered the “Lower Keys”, which extends eastwardly from Key West to the west end of the Seven-Mile Bridge. Corporate Offices are located at 1001 James Street, Key West, Florida and the Transmission and Distribution (T&D) Facility is located on Stock Island at 6900 Front Street Extended, Key West, Florida 33040.

KEYS and its representatives have exercised due care in preparing this Request for Proposals (RFP). All information contained herein is believed to be substantially correct. However, bidders should verify information independently if desired. KEYS and its representatives do not warrant the accuracy of information contained herein.

SPECIFICATIONS

1.01 GENERAL

These specifications define the electrical and mechanical requirements for the replacement of the AT1 autotransformer at US1 Substation. The substation operates with two 138kV/69kV autotransformers in parallel, supplying the 69kV loop that serves the City of Key West and Stock Island. The existing AT1 transformer is being replaced, and these specifications outline the requirements for its replacement to ensure compatibility with the existing system, substation clearances, and improved capacity where feasible.

There will be a base bid for North America manufacturing of the transformer with an entire stainless steel tank.

There will be an alternate bid for North America manufacturing of the transformer with a mild steel tank and a stainless steel top.

There will also be a second alternate bid for North America manufacturing of the transformer with an entire mild steel tank

US1 Autotransformer 1 (“AT1”):

The replacement for AT1 shall be a 138/69kV, three-phase, three-winding, oil-immersed autotransformer with a wye-wye-delta connection, designed for 60 Hz operation and rated 75/100/125 MVA (ONAN/ONAF/ONAF) with a 65°C average winding rise. The unit shall be oil-filled with a nitrogen blanket (no conservator tank) and designed for outdoor installation in a tropical climate.

The new transformer shall not exceed the existing dimensions of the Westinghouse autotransformer it is replacing (see attachment 1 within this document) to maintain compatibility with current clearances while increasing capacity.

The high-voltage winding shall be 138kV, wye-connected, solidly grounded, and the low-voltage winding shall be 69kV, wye-connected, solidly grounded. A 13.8kV buried delta tertiary winding shall be included for harmonic suppression and neutral stabilization.

The manufacturer shall ensure compliance with IEEE, ANSI, and NESC standards while designing the unit for continuous duty.

*NOTE:

If bidders can provide a transformer that is larger than a 65°C rise 75/100/125MVA capacity unit while still not exceeding the current Westinghouse Transformer dimensions, they are encouraged to submit a separate proposal in addition to this proposal.

1.02 RATING

US1 Autotransformer 1 H.V. Voltage: 138,000 volts – Wye-Solidly Grounded L.V. Voltage: 69,000 volts – Wye-Solidly Grounded Tertiary Winding 13.8kV- Suitably sized for harmonic suppression and neutral stabilization MVA @ 65 C Base 75 Altitude: Sea Level plus 10 FT.

Environment: Humid Tropical Environment Base Bid:

The transformer tank shall be stainless steel and manufactured in North America.

Alternate Bid 1:

The transformer tank shall be mild steel with a stainless steel top and manufactured in North America.

Alternate Bid 2:

The transformer tank shall be mild steel and manufactured in North America.

1.03 HV TAP CHANGER (DE-ENERGIZED)

The transformer H.V. windings: 5 tap positions. Tap position 3 shall be the 138kV base. There shall be a 2.5% increase or decrease from tap 3 for the remaining taps

Tap Position % from 138kV Base (Tap 3) 1 5 2 2.5 3 0 4 -2.5 5 -5

These taps shall be de-energized taps operated by a handle, which passes through the side of the transformer tank at a location accessible from ground level. The H.V. tap changer handle shall have a nameplate and provisions for pad locking in any tap position.

1.04 COOLING

The transformers cooling class shall be ONAN/ONAF/ONAF.

The ratings shall be 75/100/125 MVA at 65°C rise.

1.05 BASIC IMPULSE LEVEL

H.V-138kV. 650kV BIL L.V-69kV. 350kV BIL

L.V.(tertiary- 13.8kV). 110kV BIL

1.06 IMPEDANCE

Transformer impedance to be as specified by IEEE C57.12.10. The impedance of the parallelled transformer is 4.7%.

1.07 POLARITY

According to ANSI Standard C57.12.00 and ANSI Terminal Marking Connections C57.12.70.

1.08 ASSEMBLY

The transformer shall be shipped as completely assembled as practical. No welding shall be required to complete field assembly. Manufacturer shall specify the total shipped weight of the transformer.

1.09 STANDARDS

The transformer shall be designed, built and tested per ANSI C.57.12.30 and other applicable United States ANSI, IEEE and NEMA standards in effect as of October 1, 2006. Latest applicable standards shall be those in effect as of the bid date. Each bidder shall with his proposal, show that he has field servicemen available in the southeast to service the equipment; that he has previously made equipment such as that which he proposes to furnish; and that it has been in satisfactory service of not less than five (5) years.

1.10 NOISE LEVEL

The transformer noise levels shall not exceed the DB ratings specified in IEEE Standard C57.12.90

1.11 TRANSFORMER EQUIPMENT

A. Supply the following standard accessories per ANSI C57.12.10.

• Reinhausen ETOS Control Cabinet and Transformer monitor (or equals).

o Reinhausen MControl (or equals) Touch Panel equipped inside the control cabinet.

• Reinhausen MSense DGA (5/9) (or equals)

• Reinhausen MSense FO Fiber Optic online temperature measurement system (or equals)

• Reinhausen MSenseBM Bushing Monitor System (or equals)

• Reinhausen Moisture TFTX Sensor (or equals)

• Reinhausen MESSKO MPREC Pressure Relief device for Tank (or equals).

• Fault pressure relay. This relay shall be designed to operate on the sudden abnormal change of pressure in the transformer due to an internal fault and shall actuate an auxiliary relay in the control cabinet.

• Reinhausen Magnetic liquid-level indicator with Low Alarm (or equals)

• Reinhausen Liquid temperature indicator (or equals) with one form “C” alarm and one form “C” trip contact. Dial calibration of this indicator shall be in degrees centigrade with one pointer to indicate liquid temperature and a red pointer to show previous maximum temperature. An external reset shall be provided for the red pointer. Mount gauge at eye-level or below.

• Reinhausen Winding temperature indicator (or equals) with two form “A” alarm contacts and one form “C” trip contact: Dial calibration of this indicator shall be in degrees centigrade with one pointer to indicate winding temperature and a red pointer to show previous maximum temperature. An external reset shall be provided for the red pointer.

Mount gauge at eye-level or below. Used as a back up to the MSense FO system.

• Reinhausen Pressure-vacuum gauge (or equals).

• Drain and filter press valve globe type – 2-inch NPT female with .375-inch sampler.

• Top filter press valve globe type – 1.0-inch NPT female on top to tank.

• Vacuum filling connection – 2-inch NPT male, on top of main transformer tank.

• Lifting facilities for cover, core and entire transformer.

• Moving facilities.

• Jacking facilities.

• Diagrammatic Nameplate; includes noise rating.

• Two tank-grounding pads with connectors for 4/0 copper ground cable.

• Two manholes in cover

B. Oil Preservation System Inert-gas pressure (nitrogen) system. The interior of the transformer will, by means of a positive pressure of inert gas-maintained form a separate inert-gas source and reducing valve system, be sealed from the atmosphere throughout a top-oil range temperature of 100 degrees C. The Nitrogen Blanketing System supplied shall be manufactured in the USA and utilize a stainless steel NEMA 4X cabinet.

C. Monitoring System The transformer shall have a Reinhausen ETOS monitoring system. Each monitoring system shall enable monitoring of the following systems (minimum):

• Top Oil Temperature

• Ambient Temperature

• Single Phase load monitoring

• Calculated Winding Hot Spot Temperature

• Fan Monitoring

• Cooling Control Auto/Man

• Low Oil Main Tank

• Pressure Relief Device

• Sudden Pressure Relay

• Nitrogen Pressure High

• Nitrogen Pressure Low

• Nitrogen Cylinder Low

The transformer manufacturer shall recommend the system to be used to the purchaser at time of bid, if an ETOS monitoring system is not being proposed and an “equals” is being proposed.

Communication system of all monitored points shall have DNP-TCP (Ethernet) compatibility for KEYS SCADA interfacing.

E. Bushings High-Voltage (HV) Bushings (138kV)

• Type: Cover-mounted, condenser-type bushings, rated for 138kV system voltage.

• Governing Standard: IEEE C57.19.01 for bushing design and performance.

• Location & Mounting: In accordance with ANSI C57.12.10. (see section 1.11 paragraph S for exact locations)

• Creepage Distance: Standard creepage distance per system BIL requirements.

Low-Voltage (LV) Bushings (69kV) & Neutral Bushing (HOXO)

• Type: Cover-mounted condenser-type bushings, rated for 69kV system voltage.

• Governing Standard: IEEE C57.19.01.

• Location & Mounting: Per ANSI C57.12.10. (see section 1.11 paragraph S for exact locations)

• Creepage Distance: Standard per BIL requirements.

Buried Delta Tertiary Bushings (15kV)

• Type: Internally mounted bushings for the buried delta tertiary winding.

• Voltage Rating: 15kV class, suitable for harmonic suppression and system stabilization.

• Configuration: Connected internally within the transformer in a closed delta configuration.

General Bushing Requirements

• Bushing Studs: Manufacturer’s standard, designed to accommodate both copper and aluminum connections.

• Stud Connectors: 4-hole NEMA-spaced pads for compatibility with standard terminal connections.

F. Radiators Radiators shall be made of stainless steel. Radiators shall be removable with drains.

Removable type shutoff valves shall be supplied at the top and bottom to permit removing radiators without draining transformer oil.

G. Fan Motors Motors shall be Krenz, single phase, capacitor start 120/ 240-volt, induction motors. They shall be designed and built in compliance with IEEE, NEMA and ANSI standards. Fan casing and shield shall be made of non-corrosive metal. Cage shall totally enclose the fan blades.

H. Control Cabinet The ETOS control cabinet shall be manufactured of stainless steel.

I. Insulating Oil Oil must conform or exceed the specifications given in ASTM D3487 Type II with three additions

- acid number 0.015 maximum (from IEEE C57.106), non-corrosive per ASTM D1275 Method B, and inhibitor content 0.3%. Oil shall be non-PCB as defined in 40CFR761.

J. Arresters Two (2) sets of three (3) station class polymer surge arresters mounted on the transformer. The following ratings apply:

Winding Duty Cycle MCOV H.V. 120kV 98kV L.V. 60kV 48kV

K. Bushing Current Transformers

H.V., and L.V bushings shall be supplied with the quantity and type shown below. CT ratios shall be per ANSI C57.13.

CT’s

H1: 2-BCT 1200/5 M.R

H2: 2-BCT 1200/5 M.R

H3: 2-BCT 1200/5 M.R

HO/XO: 1-BCT 1200/5 M.R

X1: 2-BCT 1200/5 M.R

X2: 2-BCT 1200/5 M.R and 1- WTI C100 CT 700:5

X3: 2-BCT 1200/5 M.R

Current transformers shall have all taps wired to shorting type terminal blocks in the control cabinet.

L. Gasket and Gasket Compound Necessary nitrile rubber gaskets and compound for installing shall be provided for initial field installation.

M. Touch-up Paint Manufacturer to supply one quart. Color as specified in 1.11

N. Tank Assembly Tank:

• Shall be welded stainless steel plate construction (for the base bid) OR mild steel with a stainless steel top (for the alternate bid 1) OR entirely mild steel (for the alternate bid 2).

• Shall be oil-tight with all fittings in place

• Capable of withstanding without permanent deformation pressure 25% greater than the maximum operating pressure resulting from the oil preservation system per ANSI C57.12.10

• Shall withstand 10 psig internal pressure without showing leak when using warm oil.

• Shall be suitable for full vacuum filling and drying in the field.

• Shall be provided with tanking guides for centering core and coil assembly.

Joints and Gaskets:

All gasketed joints to have machined surfaces on both sides:

• To assure even and effective pressure.

• To avoid overstressing gasket and to maintain an oil-tight joint under all service conditions.

• NOTE: Joints are to be provided with gasket retainers and metal to metal stops.

O. Core and Coil Assembly

• Core Laminations: shall be high permeability, laser scribed steel

• Coils shall be copper.

• Joints in windings or at bushings: Brazed or clamped

• Coil Insulation: Dennison densified insulation with mechanical toughness, tear strength and elongation strength. Also, it must have superior electrical impulse strength and be thermally upgraded cellulose insulation.

• Rigidity: Assembly to be braced or bolted adequately to prevent displacement and distortion under all normal conditions of handling and operation under short circuit conditions

• Inside bolted connections: Locking provision required

• Serial Number: Stamped on core in conspicuous place

• A neutral lead shall be brought out from the core of the transformer to a termination point adjacent to a manhole and easily accessible to the person inspecting or testing the transformer

P. Base A structural I-beam base shall be provided for the transformer.

Q. Top of Transformer The top of the transformer shall be sloped to prevent water accumulation and have safety harness anchor points. The transformer top shall be stainless steel in both base and alternate bids.

R. Sample Port A flooded port, separate from the oil drain valve, 1 1/2-inch NPT female threads shall be provided for future testing the transformer oil.

S. Orientation Segment 1 (front): LV bushings on this side and nameplate, gauges, valves, control cabinet etc.

Segment 2: Additional radiators mounted on this side (current configuration) or in Segment 4 (no longer a conservator in segment 4).

Segment 3: HV Bushings and radiators mounted on this side.

Segment 4: Additional radiators mounted on this side or in Segment 4.

1.12 PAINTING

All exterior surfaces to be thoroughly cleaned of mill scale and rust by grit blasting. Oil and grease are to be removed chemically. The coating must be compatible with high humidity, salt air and transformer operating temperatures. Coating shall be ACROLON ULTRA, high gloss acrylic polyurethane. As it is specifically designed to provide long term UV protection for high visibility structures.

• Primer Coat

• Intermediate Finish Coat

• Finish Coat – color to be “rawhide” (light tan), a color sample will be provided to successful bidder.

• The dry thickness of each coat shall be per the paint manufacturer’s recommendations.

• Non-skid finish on top of transformer

1.13 TESTS

The following standard test shall be made on all transformers. All test shall be made in accordance with the latest revision of “Test Code for Distribution, Power, and Regulating Transformers, and Shunt Reactors,” ANSI C57.12.90.

• Resistance measurements of all windings.

• Ratio Tests.

• Polarity and phase relation tests.

• No-load loss at rated voltage

• Exciting current at 100% and 110% rated voltage

• Impedance and load loss at full load

• Temperature Test: Temperature test or tests shall be made on one unit of an order covering one or more units of a given rating, but only when records of all temperature tests made in accordance with American Standards for a duplicate or an essentially duplicate unit performed within the past two years are not available.

• Subject to the limitations of the preceding paragraph when a transformer is supplied with auxiliary cooling equipment to provide more than on MVA rating, temperature tests shall be made at base OA & Maximum FA MVA’s

• Applied potential tests

• Induced potential tests

• Full wave impulse

• Chopped wave impulse

• Front of wave impulse

• Switching surge

• Transformer sweep frequency analysis test. This testing shall be performed with the transformer fully dressed and the transformer transit ready prior to shipment. The test shall be repeated after receipt at the customer site with the transformer in its transit ready configuration.

1.14 INFORMATION TO BE SUPPLIED BY MANUFACTURER

Three copies of the following shall be provided:

• Certified test reports.

• Certified transformer impulse test reports, if applicable

• Installation instructions

• Manufacturer and specifications of oil furnished

• Proposed outline drawings, bushing data, nameplate drawings, and wiring and connection diagrams shall be furnished as part of the bid

• Instruction Book

• Supply complete performance specifications per ANSI C57.12.00

Outline drawings, bushing data, nameplate drawings, and wiring and connection diagrams shall be submitted for approval prior to manufacture of the equipment. Any drawing returned to the vendor marked “not approved” must be resubmitted for approval after making corrections.

Drawings returned to the vendor marked “approved” or “approved with exceptions as noted” need not be resubmitted for approval but must be corrected and returned as final drawings.

1.15 SPARE PARTS

The following spare parts shall be provided for the order:

• Spare gauges

a) 1- Liquid Level gauge

b) 1- WTI gauge

c) 1- Liquid Temperature gauge

d) 1- Pressure-Vacuum gauge

• 1- Sudden Pressure relay

• 2- Cooling fans complete with hardware

• 1- 138kV bushing

• 1- 69kv bushing

1.16 TRANSPORTATION

Due to the geographical location of Key West, special attention to the method of transport is required. The Florida Department of Transportation (FDOT) may or may not permit truck transport over the series of bridges that connect the Florida Keys depending on transformer size and weight. It is advisable to start the FDOT Permit process well in advance of the shipping date.

The series of bridges from Florida City to Key West present unusual circumstances and the permitting process is more rigorous. If FDOT will not permit truck transport, alternative method of transport is via barge. Florida Keys Aqueduct facility has barge docking facilities and is located adjacent to the Keys Energy Warehouse Property. This property is approximately 1.5 miles from the substation in which the transformer is to be installed.

• Impact recorder shall accompany the transformer during transit. The Seller shall be responsible for inspecting the transformer and impact recorder in the presence of the Purchaser upon arrival at the shipping destination to determine if any damage has occurred.

• Purchaser shall be notified by the Seller at least 2 (two) week’s prior to shipment and by the Carrier 24 hours prior to arrival of each transformer at its destination.

1.17 DELIVERY & WARRANTY

Delivery, inspections and acceptance will be at destination, F.O.B. Key West. Unit prices shall include delivery to US1 Substation, 5901 Overseas Highway, Key West, Florida. Until delivery and acceptance and after any rejections, risk of loss will be on the Manufacturer, unless loss results from negligence of KEYS.

The supplier shall propose a delivery schedule to minimize transformer cost. All transformers shall be delivered to their respective substation. Transformer assembly and electrical testing shall be done at their respective substation with the transformers in their transit ready state.

The supplier shall be responsible for delivery and offloading of the transformer to the KEYS substations in Key West, Florida. Bidder shall consider all KEYS delivery blackout dates, as listed in Appendix A.

Supplier warranty shall be 18 months from time of delivery and final acceptance.

Anticipated dates and final locations of transformers and restrictions on installation are listed below to aid manufacture in proposal of delivery schedule. An optional three (3) year extended warranty shall be provided on the Proposal Page.

Blackout Delivery Dates January 1st & 2nd July 29th & 30th (Mini Season) October Goombay through Fantasy Fest November Election Day November Week of Thanksgiving December Week of Christmas December 31st (New Year’s Eve)

1.18 ATTACHMENTS

1. Shop Order MNM5140-01

2. Nameplate Drawings

1.19 PROPOSAL CONTENTS & EVALUATION

The proposal should include a description of the firm’s capabilities and experience with providing the requested services, including a description of any special qualifications which are indicative of working familiarity with similar projects.

The proposals will be evaluated. The evaluation criteria will include a variety of considerations, including, but not limited to:

1. Loss Evaluation An equivalent Total Cost shall be calculated from the transformer bid price and the present value of manufacturer’s quoted losses as shown below. The Total owning cost formula to be used is as follows:

• TOC= Price + (NL Watts x 5.405) + (LL Watts * 1.838) Where:

• TOC= Total Owning Cost.

• Price= Quoted Purchase Price.

• NL Watts= Quoted No-Load Losses in Watts.

• LL Watts= Quoted Load Loss in Watts at rated load.

TOC will be calculated for the transformer.

• US1 “AT1”: No Load Watts.

• US1 “AT1”: Load Loss at Rated Load.

The TOC will be one of the determining factors for award of contract. Failure to submit transformer losses along with bid will result in non-compliance and the bid will be rejected.

2. Transformer noise levels.

3. Range and suitability of services provided. Specifically, has servicemen available in the southeast to service the equipment.

4. Experience with similar projects and has previously made equipment such as that which he proposes to furnish.

5. Similar equipment that has been in satisfactory service of not less than five (5) years.

6. Project management approach.

7. The supplier shall propose a delivery schedule to minimize transformer cost.

8. References.

9. Delivery timetable

1.20 BID SUBMITTAL

Proposals shall be submitted electronically via VendorLink or DemandStar prior to the opening date and time. Emailed proposals will not be accepted. Should a vendor not be able to submit via VendorLink or DemandStar, paper submittals will be accepted. Paper submittals must be received before the opening date and time to be considered.

Paper submittals can be sent via FedEx, UPS, or In-Person to:

Keys Energy Services Bid Opening Committee – Bid 11-25 6900 Front Street Extended Key West, Florida 33040 Note: This address does not receive US Postal Service.

Bidders must submit the following to be found responsive:

1. Bid Bond or Cashier’s Check for 5% of Total

2. Proposal Page

3. Insurance Agent’s Statement

4. Bidder’s Statement

5. Public Entity Crimes Sworn Statement

Proposal Page 1 of 2 Pursuant to and in compliance with your advertisement for bids and other contract documents relating thereto, the undersigned bidder, having familiarized himself with the terms and conditions affecting the performance of the contract contained in the specifications, hereby proposes and agrees to perform within the contract documents, schedules, and specifications for the following amounts.

UNIT PRICE BID SCHEDULE

US1 AT1 (Base

Bid)

US1 AT1

(Alternate Bid 1)

US1 AT1

(Alternate Bid 2) MVA (65C Rise) 75/100/125 75/100/125 75/100/125

Impedance

Manufacturer

Unit Price (inclusive of delivery)

No Load Losses (Watts)

Load Losses at Rated Load (Watts)

TOC

Expected Delivery Date

Entire Mild Steel Tank Assembly

Yes

Entire Stainless Steel Tank Assembly

Yes

Mild Steel Tank Assembly with a Stainless Steel Top

Yes

Transformer Manufactured in North America?

*Indicate Where Country and City of Origin

Yes Yes Yes

Indemnity $10.00 $10.00 $10.00

(Optional) 3-Year additional warranty

Total ($)

Proposed Delivery Date

Is all Reinhausen equipment included? Yes No

If no, what equals are you proposing

Are all Spare parts included? Yes No

Proposal Page 2 of 2

Company: ___________________________________________________________

Contact Person: _______________________________________________________________

Address: ___________________________________________________________

Telephone: _________________________________________________________

Email: _____________________________________________________________

Subcontractor(s) :____________________________________________________

Submitted by: _______________________________________________________ (Signature and Print Name)

Bid Bond Enclosed (Yes / No) or Cashier’s Check: $________________________ _

KEYS reserves the right to accept and/or reject any proposal or any portion of a proposal. Bidder shall submit with the proposal any constraints, if any.