20-0067 RFB AMD 1.docx
DOCX document 193 KB Posted
- Attached to
- 60KV PULSED POWER SUPPLY(UW-MAD)[20-0067]
- Solicitation number
- 20-0067
- Issued by
- Dane County, Wisconsin
About this file
This is Amendment #1 to Request for Bid (RFB) No. 20-0067 issued by the University of Wisconsin-Madison Purchasing Services for a 60KV Pulsed Power Supply. The amendment was issued to address questions received from bidders during the solicitation process. The original bid document remains the controlling document for the resulting contract, and all other terms and conditions not modified by this amendment remain unchanged. Bidders must acknowledge receipt and compliance with the amendment; failure to return the amendment will result in the assumption that the original bid meets all conditions. Bid prices and terms are firm for sixty days from the date of bid opening.
The amendment includes a Questions and Answers section addressing four key technical clarifications: confirmation that the voltage reference (flat-top value) will not change during the pulse with no dV/dt requirement; specification of acceptable testing operation parameters allowing up to 50 pulses of 2 milliseconds with a 0.4% duty cycle and 2 Hz repetition rate for a maximum of 25 seconds, followed by 180 seconds of inactivity; clarification that a crowbar is not necessary if post-fault energy delivery is limited to less than 5 joules; and confirmation that energy storage voltage of 2200V DC is acceptable despite the original specification of less than 1500V DC. Bidders must certify compliance with all terms, non-collusion, conflict of interest policies, and federal debarment status. Inquiries regarding this bid should be directed to Jeff Whitman at UW Purchasing, 21 N Park Street, Suite 6101, Madison, Wisconsin 53715-1218, or by phone at 608-262-6120.
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Other files
| File | Type | Posted |
|---|---|---|
| 20-0067 RFB AMD 3.docx | DOCX document | |
| 20-0067 RFB.docx | DOCX document | |
| 20-0067 RFB AMD 2.docx | DOCX document |
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Text version
AMENDMENT #1
Bid No: 20-0067
UNIVERSITY OF WISCONSIN
MADISON, WISCONSIN 53715-1218
Bid prices and terms shall be firm for sixty (60) days from the date of bid opening, unless otherwise specified in this Request for Bid by the UW-Madison Purchasing Services.
Unless otherwise noted, public openings will be on the date and time specified. Award(s), if any, will be made as soon thereafter as possible.
The bid abstract will be on file and is open to public inspection only after award determination has been made.
If NO BID (check here) ☐ and return.
AMENDMENT #1 / 20-0067 / 60KV PULSED POWER SUPPLY Amendment #1 is issued to answer questions received from bidders. If this amendment is not returned, it shall be assumed your original bid meets all conditions of the amendment. All other terms and conditions remain the same. Please revise and submit your bid accordingly.
In signing this bid, we have read and fully understand and agree to all terms, conditions and specifications and acknowledge that the UW-Madison Purchasing Services bid document on file shall be the controlling document for any resulting contract. We certify that we have not, either directly or indirectly, entered into any contract or participated in any collusion or otherwise taken any action in restraint of free competition; that no attempt has been made to induce any other person or firm to submit or not to submit a bid; that this bid has been independently arrived at without collusion with any other bidder, competitor or potential competitor; that this bid has not been knowingly disclosed prior to the opening of bids to any other bidder or competitor; that the stated statement is accurate under penalty of perjury. I certify that the information I have provided in this bid is true and I understand that any false, misleading or missing information may disqualify the bid.
By submitting a bid, the bidder certifies that no relationship exists between the bidder and the University that interferes with fair competition or is a Conflict of Interest, and no relationship exists between such bidder and another person or firm that constitutes a Conflict of Interest. Further, bidder certifies that no employee of the University whose duties relate to this request for bid assisted the bidder in preparing the bid in any way other than in his or her official capacity and scope of employment.
The Bidder certifies by submission of the bid that neither it nor its principals is presently debarred, suspended, proposed for debarment, declared ineligible, or voluntarily excluded from participation in this transaction by any federal department or agency.
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QUESTIONS AND ANSWERS for RFB 320-0067
Q1. Will the flat top voltage reference change during the pulse? If so, which will the maximum dV/dt of the voltage reference?
| A1. | The voltage reference (flat-top value) will not change during the pulse. There is no dV/dt to this reference. The output voltage, including any variations from any sources, must stay within the range specified by the voltage ripple in specification #7 of the flat-top value and as defined in Figure 2a; the bidder should supply the frequency content of the output ripple. |
| Q2. | Testing operation. Can you accept a burst of 50 pulses of 2 ms, then disconnect and charge for 180 seconds? |
| A2. | In testing mode, we can accept a sequence of up to 50, 2 ms pulses with a duty cycle of 0.4% and pulse repetition rate of 2 Hz for up to 25 seconds maximum (100 ms maximum ‘on’-time), followed by a period of inactivity/recharging of 180 seconds before next activity. (i.e. Testing time as in specification #4 is limited to 25 seconds with 180 seconds between testing sessions.) |
| Q3. | Crowbar. Our topology doesn’t need any crowbar. |
| A3. | If the energy delivered from the supply after any fault trip is limited to < 5 J as in specification 6, a crowbar is not necessary. |
| Q4. | Storage voltage < 1500 Vdc. We use 2200V for this topology. |
A4. 2200V for energy storage is acceptable.
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