CITY OF TACOMA Transmission & Distribution

CITY OF TACOMA Transmission & Distribution ADDENDUM NO. 1 DATE: May 3, 2017 REVISIONS TO: Request for Bids Specification No. PT17-0124N Solid Insulation Distribution Transformer NOTICE TO ALL: RESPONDENTS: This addendum is issued to clarify, revise, add to or delete from, the original specification documents for the above project. This addendum, as integrated with the original specification documents, shall form the specification documents. The noted revisions shall take precedence over previously issued specification documents and shall become part of this contract. REVISIONS TO THE SUBMITTAL DEADLINE: The submittal deadline has been changed to 11:00 a.m., Pacific Time, Monday, May 08, 2017. REVISIONS TO SECTION 3 - TECHNICAL PROVISION: Replace existing Section 3 with the below Technical Provisions. NOTE: Acknowledge receipt of this addendum by initialing the corresponding space as indicated on the Request for Quotations page. Vendors who have already submitted their bid/proposal may contact the Purchasing Division at 253-502-8468 and request return of their bid/proposal for acknowledgment and resubmittal. Or, a letter acknowledging receipt of this addendum may be submitted in an envelope marked Specification No. PT17-0124N, Addendum No.1. The City reserves the right to reject any and all bids, including, in certain circumstances, for failure to appropriately acknowledge this addendum. cc: Kim Kerner, Roberta Cox Form No. SPEC-220A Revised: 07/30/2015

Return Bids By 11:00 AM, 05/08/2017 to: sendbid@cityoftacoma.org Seth J Hartz ABN 4th Floor NE 3628 South 35th Street Tacoma WA 98409 Ph. 253 502 8299 Fax. 253 502 8299 Material will ship to: T&D Administration 3628 S 35th St Tacoma WA 98409 CITY OF TACOMA THIS IS NOT AN ORDER All prices quoted shall be F.O.B. Destination, Freight Prepaid and Allowed Page 1 of 2 All responses & inquiries must be plainly marked with this REQUEST FOR QUOTATION 6000044533-1 RFQ Information Collective Bid # PT17-0124N Bid Issue Date 04/13/2017 Vendor Number 109226 WEB VENDOR FOR RFQ Vendor Information (vendor to complete) Firm Name: Address: City/State/Zip / / Phone/Fax / E-Mail Contact Name Payment Terms %, days (e.g. 2% 10,N30) Tacoma Bus. Lic. # Taxpayer ID # SIGNATURE OF PERSON AUTHORIZED TO SIGN THIS BID x DATE: / / NAME : TITLE : Item # Material# Delivery QTY UM Net Price Total Description Date ***The City of Tacoma will accept mailed bid submittals sent to sendbid@cityoftacoma.org for this solicitation. Please include the Collective Bid Number in the subject line of your e-mail. Bids are subject to the submittal deadline noted in the bid solicitation document. The time of e-mail receipt will be considered as the time of submittal. Submittals are accepted by one of the following delivery methods: e-mail, facsimile, or mail. The City accepts no responsibility for transmission errors. The City of Tacoma is soliciting bids for PT17-0124N Solid Insulation Distribution Transformer Responses must be submitted on the provided City of Tacoma bid solicitation form. Vendor signature is mandatory. All bid pricing shall be FOB Destination, freight prepaid and included in the unit price. Items must be new and unused. Any bidder may be notified to clarify their bid proposals. This action

CITY OF TACOMA THIS IS NOT AN ORDER All prices quoted shall be F.O.B. Destination, Freight Prepaid and Allowed Page 2 of 2 All responses & inquiries must be plainly marked with this REQUEST FOR QUOTATION 6000044533-1 Item # Material# Delivery QTY UM Net Price Total Description Date shall not be construed as negotiations or an indication of intentions to award. The bidder must be able to provide the information within two (2) business days. Purchasing related questions: Seth Hartz, 253-502-8299 shartz@cityoftacoma.org Addendum No. 1 - Submit this Request for Quotation page acknowledging addendum in place of the original. ***Please initial receipt of addendum No 1: (Initials) and return with your bid submittal. 10 4 Wire Solid Insulation Distribution 5 EA Transformer # 50kVA 20 4 Wire Solid Insulation Distribution 3 EA Transformer # 100kVA 30 Injection Shell 2 EA Line item included to identify any additional charges for the manufacturing of a custom mold design. Net Value $ Plus Tax at % $ Total Amount $

SECTION 3 - TECHNICAL PROVISIONS These Technical Specifications have been prepared by a licensed Professional Engineer registered in the State of Washington. 3.00 STANDARDS & TERMINOLOGY Terminology used in this specification is consistent with IEEE C57.12.80 unless otherwise noted. 3.00.1 STANDARDS All transformers shall meet the most recent editions of the following standards and all others that are applicable: Standard Number IEEE 386 Standard Title SEPARABLE INSULATED CONNECTOR SYSTEMS FOR POWER DISTRIBUTION SYSTEMS ABOVE 600 V IEEE C57.12.00 IEEE C57.12.01 IEEE C57.12.23 IEEE C57.12.38 IEEE C57.12.80 IEEE C57.12.90 IEEE C57.12.91 ANSI Z535 ANSI C119.4 NEMA TR 1 GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS General Requirements for Dry-Type Distribution and Power Transformers Including Those with Solid Cast and/or Resin Encapsulated Windings SUBMERSIBLE SINGLE-PHASE TRANSFORMERS: 167 KVA AND SMALLER; HIGH VOLTAGE 25 000 V AND BELOW; LOW VOLTAGE 600 V AND BELOW PAD-MOUNTED-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS 250 KVA AND SMALLER: HIGH VOLTAGE, 34 500 GRDY/19 920 V AND BELOW; LOW VOLTAGE, 480/240 V AND BELOW TERMINOLOGY FOR POWER AND DISTRIBUTION TRANSFORMERS TEST CODE FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS TEST CODE FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS SAFETY SIGN AND LABEL STANDARDS ELECTRICAL CONNECTORS CONNECTORS TO USE BETWEEN ALUMINUM-TO-ALUMINUM OR ALUMINUM-TO-COPPER CONDUCTORS DESIGNED FOR NORMAL OPERATION AT OR BELOW 93 DEGREES C AND COPPER-TO-COPPER CONDUCTORS DESIGNED FOR NORMAL OPERATION AT OR BELOW 100 DEGREES C TRANSFORMERS, REGULATORS, AND REACTORS

3.01 - ENCLOSURE SPECIFICATIONS 3.01.1 DIMENSIONS The maximum dimensions of the submersible transformers should be as shown below. Secondary cable leads are not included. 50 kva and Below 75 kva & 100 kva Length 24 +/- 1 30 +/- 1 Width 24 +/- 1 25 +/- 1 Depth/Height 20 +/- 1 22.5 +/- 1 3.01.2 ENCLOSURE MATERIAL The core-coil assembly shall be encapsulated in a thermo-plastic material that shall serve as the unit enclosure. The thermo-plastic material shall: be non-hygroscopic (does not absorb moisture from the air). provide moisture immunity to depth of 6 feet of water per IEEE Standard 386. o All terminals that extend from the core-coil to external positions shall be sealed to meet this requirement. be corrosion free in the presence of road salts, salt water immersion, petroleum products. require no future maintenance to maintain its corrosion resistance or water penetration. 3.01.3 UNIT FRAME The encapsulated unit shall be mounted within a corrosion resistant frame that will include: 4 point lifting provisions positioned for balanced lifting o Each lifting position shall be rated for the weight of the unit. o The provisions shall accept: 3/4 shackles 12 kips rated. 1-1/2 (3.8 cm) lifting straps Minimum of two stainless steel parking stands per Section 3.03.2. Bonding provisions that will allow for the frame to be grounded to the encapsulated unit. The frame shall allow for the unit to be mounted: Floor installations (Horizontal) 3.01.4 CROWNING The unit and frame shall be designed to avoid the pooling of water.

3.01.5 NAMEPLATE INFORMATION The nameplate shall meet the intent of IEEE C57.12.00. The nameplate shall include: Manufacture Name Manufacture Location Year of Manufacture Model Number (If not included the serial number) Serial Number City of Tacoma PO# Graphical representation of the winding configurations with polarity clearly marked per IEEE Stds Winding material Insulating/Encapsulation material KVA Rating High-Voltage & Low-Voltage Ratings Design Impedance Temperature Rise Ratings BIL Ratings Weight of the unit with & without frame Statement clearly stating that there are no fluids contained within the unit. 3.02 - INSULATION LEVEL The insulation class and basic lightning impulse insulation levels (BIL) for the windings and terminals shall be as shown below: Components Insulation Class BIL High voltage winding and terminals 15 kv 95 kv Low voltage windings and terminals 1.2 kv 30 kv Secondary neutral terminal 1.2 kv 30 kv

3.03 - APPARATUS SPECIFICATIONS 3.03.1 ARRAINGMENT OF BUSHINGS The physical arrangement of the high side and low side terminations shall be as shown below. 3.03.2 PARKING STANDS Minimum of two stainless steel parking stands (Detail A, Figure 2A, IEEE C57.12.38): Each will allow for the application of an IEEE 386 15kV Loadbreak Portable Feedthru connector (aka: feed-thru parking bushing, see Eaton/Cooper Power http://www.cooperindustries.com/content/dam/public/powersystems/resources/lib rary/500_loadbreakconnectors/ca650072en.pdf ) for parking and grounding of 15kV cable. The location of the parking stands shall allow for minimal movement of the 200A IEEE 386 Load-break elbows. 3.03.3 GROUNDING ATTACHMENTS Two tin-plated copper grounding pads extending on either side of the transformer. Each pad shall have 2 holes per NEMA Std. 3.03.4 PRIMARY, HIGH-VOLTAGE, TERMINATIONS The following is required for the primary terminations. 3.03.4A BUSHING WELL The bushing well shall: be per Figure 3 of IEEE 386, o able to accept a 15 kv, 200A load-break bushing insert, such as Cooper Power Systems Catalog No. LBI215, or equivalent include a replaceable copper 3/8 inch - 16 UNC stud be shipped with suitable dust covers covers that will withstand transportation from the factory, to Tacoma Power, to the job site as approved.

3.03.5 SECONDARY AND NEUTRAL LOW-VOLTAGE TERMINATIONS Each secondary terminal shall extend 6 feet (1.8 m) of cable meeting IEEE Std C57.12.23 Section 6.2 for low-voltage cable leads. (Requirement for minimum of 90 o C 600V application). 3.03.5A SECONDARY CABLE Each secondary cable extensions shall be made up of two segments of cable: Segment Fixed Cable (Winding Extension) Extension Cable (Service Cable) Secondary Connection Requirement The secondary cable shall be composed of fixed flexible cable lead extending 3 ft. (0.9 m) beyond the enclosure of the transformer. The cable shall meet IEEE Std 1580 and UL Std 1309 for 2kV(HD) 110 o C or functional equivalent flexible copper cable and shall be secured to limit physical stress to internal connections to the windings. The extension cable shall be Class B copper cable per Table 3 of IEEE Std C57.12.23 The fixed cable segment shall be connected to the extension cable segment by a compression connector meeting ANSI Std C119.4 covered by a heavy wall heat shrink insulating cover equivalent to TE Raychem WCSM units. 3.03.5A.1 SECONDARY CABLE SIZE & STRANDING kva # / Terminal Cable Size Fixed Cable Extension Cable Stranding Cable Size Stranding 25 1 4/0 AWG 532 4/0 AWG 19 50 1 4/0 AWG 532 4/0 AWG 19 75 1 373 kcmil 925 500 kcmil 37 100 1 444 kcmil 1110 500 kcmil 37 167 2 373 kcmil 925 500 kcmil 37 3.03.5B CONDUCTOR JACKETS The conductor jackets shall meet ICEA S-66-524 / NEMA WC7 (Cross-Linked- Thermosetting-Polyethylene-Insulated or Cross-Linked-Polyolefin-Insulated) per terminal position shall be as follows: Terminals Jacket Color Fixed Cable Extension Cable X1 & X4 All Black Jacket All Black Jacket X2 & X3 All Black Jacket Black Jacket with permanent Yellow marking / stripe

3.04 CORE-COIL SPECIFICATIONS 3.04.1 DESIGN REQUIRMENTS The transformers purchased per this specification shall meet the following requirements: Characteristic Requirement Frequency Core Temp Insulation temperature Insulation Type Efficiency 60-hertz 100 o C Rise 200 o C Submersible Type - Solid Insulation without using fluids or gases Meets DOE efficiency requirements per Code of Federal Regulations 10 CFR 431.196 Energy Conservation Standards and Their Effective Dates Section o Part (c) Medium Voltage Dry-Type Distribution Transformers, Table (2)Efficiency requirements for after January 1, 2016 kva Single-phase BIL* 46-95 kv Efficiency (%) 15 97.86 25 98.12 37.5 98.30 50 98.42 75 98.57 100 98.67 167 98.83 3.04.2 CORE-COIL SCHEMATICS

3.04.3 NOISE LIMITS The noise, under normal operation of the transformer, shall be within the limits of NEMA Standard TR-1 per Table 0-3. The transformers shall be tested per IEEE C57.12.90, Section 13. KVA Rating Sound Level (db) 0-50 48 51-100 51 101-167 55 3.04.4 IMPEDANCE All transformers shall be designed to limit the primary fault current on a bolted secondary fault to the IEEE C57.12.00 maximum. 3.04.5 CORE CONSTRUCTION All cores shall be made of high-grade silicon steel. Amorphous core transformers are not acceptable for this specification. o Laminations shall be free of burrs, properly annealed, and furnished with a heat resistant insulating coating. All transformer core sections shall be grounded to the grounding tabs with supplemental bonding to the frame. o Core steel banding straps shall not be used for grounding the core The core-coil assembly shall be constructed so as to be secured against shifting due to transport, movement & installation, and secondary faults. o All welds on core braces and interior structures shall be smooth, free from splatter, and clean. 3.04.6 WINDING COIL CONSTRUCTION Primary Winding Secondary Winding Primary coils will use insulated copper wire. Secondary coils will use insulated aluminum or copper conductor. The insulation shall be suitable for 200 o C and be compatible with encapsulation molding process. 3.04.7 CORE-COIL INSULATION All solid insulating materials shall be non-hygroscopic. The windings shall be totally vacuum molded in epoxy resin using an automatic pressure gelation (APG) process which shall result in a solid insulated part with no interior voids containing air or gases of any sort.

3.05 TESTING & REPORTING All factory tests shall be made in accordance with ANSI/IEEE C57.12.00, C57.12.23 and C57.12.91 with the following exceptions: Partial discharge test 3.05.1 FACTORY TESTS Each transformer shall have the following tests performed at the factory prior to shipment: A. Ratio Tests B. Polarity C. No-load losses be the average-voltage voltmeter method at i. 100% of rated voltage (7200V or 120/240V) and ii. 105% of rated voltage (7560V or 126/252V) D. Exciting current by the average-voltage and rms ammeter method to be performed at: i. 100% of rated voltage (7200V or 120/240V) and ii. 105% of rated voltage (7560V or 126/252V) If required, corrections to a sine-wave basis shall be made by the crest-ammeter method. E. Load losses F. Impedance voltage G. Applied potential tests H. Induced potential tests I. Insulation resistance tests J. Line impulse test consisting of 2 full waves performed on the primary terminals. i. If a design impulse test is order for the 1 st transformer of the order, this transformer may be excluded from the test. 3.05.2 PARTIAL DISCHARGE TEST A. Phase to ground pre-stress voltage of 1.8 Ur (1.8 x 7200V = 12,960V) shall be induced for 30 seconds, Followed immediately afterward without interruption by a: B. Phase to ground voltage of 1.3 Ur (1.3 x 7200V = 9360V) for 3 minutes during which partial discharge is measured i. The maximum measured partial discharge during this test shall not exceed 10 pc. 3.05.3 CERTIFIED TEST REPORTS Upon completion of testing a copy of certified test reports shall be furnished to Tacoma Power for review prior to shipment.

3.05.4 DATA REPORTS Prior to shipment the following steps will be followed concerning the delivery of data required. Step 1 2 3 4 Action Upon issuance of a Purchase Order the Tacoma Power contract manager will email the appropriate representative of the Supplier and/or manufacturer a Microsoft Excel spreadsheet that includes the number of transformers and their pre-assigned Tacoma SAP Equipment numbers. The manufacturer will join individual transformer serial numbers with the Tacoma SAP Equipment numbers. The manufacturer will test assembled units and apply the Tacoma SAP Equipment numbers onto the units as required by Section 3.06.2 of the Technical Provisions. The complete spreadsheet is then sent back to the contract manager prior to shipment of the units. The following information is required: Serial Number Year of Manufacture Month of Manufacture No-Load Loss Full Load Loss Weight % Impedance X / R Efficiency value PCB Content (submit 0) Oil Capacity (submit 0) Oil Type (submit 0) 3.05.4A SUBMISSION OF DATA REPORTS Data reports shall be submitted via email to: Roberta Cox rcox@cityoftacoma.org DATA REPORT EXAMPLEA

3.06 EQUIPMENT NUMBERS, STENCILING AND LABELS 3.06.1 VOLTAGE DESIGNATIONS In addition to the KVA being stenciled on the units, Tacoma Power wishes for the voltage designations to be stenciled as well. 3.06.1A SIZE AND COLOR OF KVA & VOLTAGE DESIGNATIONS The stencils shall be the color of standard white as used with other identifying markings applied by the supplier. KVA Size Terminal Marking Designation Stencil Size Reference Section 25 50 75 1 100 167 7200 3.06.2B 240/120 7200 3/4 480/240 13800 240/120 3.06.2 CITY OF TACOMA TRACKING NUMBERS (SAP #) Tacoma Power is requiring that the vendor have unique tracking numbers (SAP Equipment Number) supplied by Tacoma Power s data management section stenciled on the units as shown below. 3.06.2A SIZE AND COLOR OF NUMBERS The seven digit SAP numbers shall be 1 stencils in the color of standard white as used with other identifying markings applied by the supplier. 3.06.2B LOCATION OF NUMBERS ON UNITS Shall be visible from above. 3.06.3 SAFETY LABELS Current ANSI Z535 approved DANGER labels, free of wrinkles and air bubbles, shall be visible from above.