Amendment_00002.pdf

(x)

DE-SOL-0005846

x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT

THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

LOVELAND CO 80539-8986

RMR

5555 E. CROSSROADS BLVD

ROCKY MOUNTAIN REGIONAL OFFICE

US DOE/WESTERN AREA POWER

WAPA (RMR)

RMR

LOVELAND CO 80539-8986

5555 E. CROSSROADS BLVD

US DOE/WESTERN AREA POWER

WAPA (RMR)

08/21/2013000002

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

07/26/2013

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not, is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Amendment is issued to provide the attached Questions and Answers to all Bidders.

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Amy K. Wright

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

NSN 7540-01-152-8070

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

08/21/2013

QUESTION #1:

With reference to document DE-SOL-0005846 – Questions and Answers – Amendment 000001, can the customer please clarify with regard to Question and answer #2? The question is in relation to the difference in design size when specifying the required phase shift at either no-load or at full load capability (300MVA).

e.g. Based on 15% maximum impedance at 180 MVA (25% at 300MVA)

Design for 40o phase shift at no load:

Equivalent design MVA = 205MVA for main tank and series unit Phase shift under load, approx. 32o advance to -47o retard

Design for 40o phase shift at full 300MVA load:

Equivalent design MVA = 251MVA for main tank and series unit Phase shift under load, approx. 40o advance to -59o retard

RESPONSE #1:

The original wording in the specification indicated a requirement for a maximum capability of 300 MVA, unity power factor, at the extreme tap ranges of +/- 40 degrees (with the indicated margin). This requirement is now changed to be in accordance with IEEE C57.135-2001(E) as follows:

The desired extreme tap range phase shift angles of +/- 40 degrees are to be arrived at based on NO LOAD through the device.

It is understood that with the transformer designed for the required phase shift at no load, there will be an actual deviation from the +/- 40 degree phase shift for any non-zero load, and that the effective power capability will be reduced in accordance with Equation 17 of the referenced standard.

QUESTION #2:

Question #2 – We know that the unit has on-load tap changing. We are asking if the +/- 40 degree phase shift is under loaded and no-load conditions.

RESPONSE #2:

The original wording in the specification indicated a requirement for a maximum capability of 300 MVA, unity power factor, at the extreme tap ranges of +/- 40 degrees (with the indicated margin). This requirement is now changed to be in accordance with IEEE C57.135-2001(E)) as follows:

The desired extreme tap range phase shift angles of +/- 40 degrees are to be arrived at based on NO LOAD through the device.

It is understood that with the transformer designed for the required phase shift at no load, there will be an actual deviation from the +/- 40 degree phase shift any non-zero load, and that the effective power capability will be diminished in accordance with Equation 17 of the referenced standard.

QUESTION #3:

Questions and Answers – Amendment 000001, Question #3 – The answer given by WAPA basically states that it is acceptable to quote at 36 degrees. We believe that WAPA should just simply state that they require the PST to be built at +/- 40 degrees, and state if this is no-load or under load conditions.

RESPONSE #3:

Margin was given at the ±40° maximum range for two reasons:

1. The exact value of phase shift at the ends of the range is not critical

2. The intention was to accommodate slight design differences among manufacturers that may result in no-load phase shifts varying nominally from 40°.

QUESTION #4:

In regard to impedance, we think that the +/- 40 degrees phase shift is at no-load condition not under load with unity power factor condition. Please clarify.

RESPONSE #4:

The original wording in the specification indicated a requirement for a maximum capability of 300 MVA, unity power factor, at the extreme tap ranges of +/- 40 degrees (with the indicated margin). This requirement is now changed to be in accordance with IEEE C57.135-2001(E)) as follows:

The desired extreme tap range phase shift angles of +/- 40 degrees are to be arrived at based on NO LOAD through the device.

It is understood that with the transformer designed for the required phase shift at no load, there will be an actual deviation from the +/- 40 degree phase shift any non-zero load, and that the effective power capability will be diminished in accordance with Equation 17 of the referenced standard.

QUESTION #5:

At what tap position shall we provide the values for no-load and load losses?

The losses vary over the regulating range.

You can take an average value of losses at neutral tap position and extreme tap position.

e.g. loss value = (2*neutral tap + min tap + max tap)/ 4

RESPONSE #5:

The Government requires the losses measured at the neutral tap.

QUESTION #6:

In Attachment A, Part 3 - Other Requirements, Section 3.2, Responsibility, third sentence, it states that "Assembly and erection of the equipment will be performed under other contracts and the erecting engineer representing the Contractor under this contract shall fully cooperate with the erection Contractor".

In Section 3.6 (b) Assembling Transformer Installation it states "The Contractor shall assemble the transformer...."

Since CLIN's 00006, 00007 & 00008 ask for pricing for Erecting Engineer please clarify if the transformer manufacturer is to include in the price of the transformer the installation or advise if a separate contract will be issued and WESTERN only wants the technical services of the transformer manufacturer's engineer.

RESPONSE #6:

Western will not be issuing a separate contract for installation/assembly. Erecting Engineer services are required and will need to be priced, separate from assembly, if the assembly that is required under Section 3.6(b) and CLIN 00005 will be done by other than the manufacturer or representative of the manufacturer.