2.06d N0018925Q0055 Amendment 0003 QA.pdf
PDF 198 KB Posted
- Attached to
- Uninterruptible Power Supply (UPS)
- Solicitation number
- N0018925Q0055
About this file
This is a Questions & Answers document (Amendment 0003) for RFP N0018925Q0055 regarding an Uninterruptible Power Supply (UPS) transformer procurement for the Department of the Navy.
The Q&A clarifies several technical specifications: the existing battery cabinets operate at 480 VDC nominal string voltage, with 48 VDC battery breakers made by Cutler Hammer. The UPS output requirement is 3W+N, requiring a transformer since the 300KW 93PM UPS does not have an output neutral. Two 480V primary, 208Y/120 secondary transformers will be fed directly from the UPS. The procurement requires vendors to be Manufacturer Authorized Partners with current Eaton reseller certification. No site visits will be permitted, and vendors must use existing batteries rather than providing new ones. A separate document titled "B420 Rigging Path" provides information about the building layout and loading dock access, though detailed UPS room layouts are not available.
View the file
Other files
Show all 17
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
UPS Transformer Q&A
RFP N0018925Q0055
Amendment 0003
CUI//PRVCY
1. Question: Is it possible to schedule a site visit prior to bidding this work?
Answer: No site visit will be conducted.
2. Question: Are any drawings available? Specifically:
a. Drawings showing the UPS room and layout of batteries, UPS, and transformer.
b. Drawings showing building with rigging path to/from the loading dock (assuming there is a loading dock available).
Answer: Provided in separate attachment titled “B420 Rigging Path”. Drawings showing the UPS room and layout of batteries, UPS and transformer are not available.
3. Question: Are we able to provide new batteries in lieu of re-using the existing batteries?
Answer: No.
4. Question: We'd like to request a site visit (approximately 1-hour) for this Friday, 12/13 in the morning to be conducted by our project manager, John DeDomenico, and our electrical installer from A&M Electric.
Answer: No site visit will be conducted.
5. Question: What are the nominal string voltages of the existing battery cabinets (as the 93PM requires 480VDC)?
Answer: 480 VDC
6. Question: Is the existing 9315 battery breaker a 24VDC shunt trip as that was normally used in that series of battery cabinets? (93PM needs a 48VDC shunt trip and aux contacts on the battery breakers.)
Answer: 48 VDC. Each of the three battery cabinets are labeled as 48 VDC.
7. Question: Are you able to provide photos of the DC disconnect?
Answer: No
8. Question: Please provide the manufacturer name of the battery disconnect presently installed.
ABB or Cutler Hammer? (Requesting because if ABB breakers, the breaker mounting pattern is different and might preclude effective reuse of the 9315 battery cabinet).
Answer: Cutler Hammer
UPS Transformer Q&A
RFP N0018925Q0055
Amendment 0003
9. Question: Just reading over solicitation N0018925Q0055 for the replacement of the Eaton UPS at the IWTC. I see there is a brand name justification, does this mean that only Eaton Corporation is allowed to quote for this?
Answer: Per the Brand Name Justification and Combined Synopsis/Solicitation section 52.212- 1 Addendum, vendor shall certify that it is a Manufacturer Authorized Partner and provide a current authorized reseller certification of Eaton products.
10. Question: The UPS Output requirement is for 3W +N. The 300KW 93PM UPS does not have an output neutral so if this is neutral is needed a transformer will be required?
Answer: Yes, as per the statement of work, a transformer is required.
11. Question: Are the two 480V primary, 208Y/120 secondary transformers fed directly from the UPS or will they be fed from a panel that is fed by the UPS?
Answer: The secondary transformers are fed directly from the UPS. (see attached drawing).
File details come from the government source that posted it. Updated .