Contractor Questions and Answers.xlsx
XLSX spreadsheet 15 KB Posted
- Attached to
- Trailer-Mounted Load Bank and Power Transformer
- Solicitation number
- NSIOG324218AS30
About this file
The file is a Contractor Questions and Answers document for a National Geospatial Intelligence Agency (NGA) solicitation (NSIOG324218AS30) for a Trailer-Mounted Load Bank and Power Transformer. The solicitation requires two separate trailers - one for a power transformer and another for a load bank - with specific technical specifications. Key technical requirements include a step-down transformer (12.47KV Primary - 480V Secondary), dry-type construction, copper windings, NEMA Type 3R weatherproof enclosure, and a 5.75% impedance rating. The load bank must be capable of testing generators and UPS systems with resistive-reactive load capabilities, controlled by an HMI+PLC system rated for outdoor use.
The document indicates a lead time of approximately six months, with one shipment preferred. The transformer and load bank must be compatible and deliverable together, with 150 feet of copper cables included. Vendors are allowed to submit multiple quotes with variant options, provided each scenario has a clear total price. The control system must be HMI+PLC type and approved for outdoor use, and all electrical conductors, including transformer windings and cables, must be copper. The equipment is intended for testing electrical systems, specifically generators and UPS systems under various load conditions.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| AMD_4_RFQ NSIOG324218AS30.pdf | ||
| Contractor Questions and Answers.xlsx | XLSX spreadsheet | |
| Contractor Questions and Answers.xlsx | XLSX spreadsheet | |
| AMD_2_RFQ NSIOG324218AS30.pdf | ||
| AMD_1_RFQ NSIOG324218AS30.pdf | ||
| RFQ NSIOG324218AS30.pdf |
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
Sheet1
| # | Date | Question | Answer |
| 1 | 4/3/25 | Is the transformer step-up or step-down transformer ? | The transformer has to be step-down transformer; 3PH, 12.47KV Primary - 480V Secondary, and shall be compatible with the load bank. |
| 2 | 4/3/25 | Can a oil-filled transformer, meeting the specs, be acceptable ? | The transformer has to be Dry Type, meeting the specs. |
| 3 | 4/3/25 | Can there be more than one quotes for different variants we may have on offer ? | It is not required by the RFQ but if the vendor wishes to take that route, NGA will not oppose. If there are variants, alternitives or options included then the quote or quotes must clearly state a total price for each scenerio. |
| 4 | 4/3/25 | Do the trailers need to be two separate trailers or one single trailer with both PT and Load Bank mounted on it ? | Two separate trailer , one for each equipment. Note: Load bank will be used to simulate electrical load on 12.47KV (Generators) and 480V (UPS systems) power sources therefore should be portable on its own when needed. |
| 5 | 4/3/25 | What is the expectation in terms of lead times ? | ~ Six Months. Assuming that the lead time on the transformer may be more than the load bank. |
| 6 | 4/3/25 | Would two different shipments be acceptable? | One shipment is preferred. One cannot be tested/commissioned without the other. Therefore, better we get them at the same time. |
| 7 | 4/9/25 | Impedance: What impedance percentage do you require? | 5.75% |
| 8 | 4/9/25 | Insulation Temperature Rise: What is the maximum allowable temperature rise for the insulation? | copper-wound transformer manufactured to achieve 80C rise and high efficiency at its rated V and KVA |
| 9 | 4/9/25 | Tap Range: What tap settings or range do you need? | 4-5 position tap changer - |
A 13090 B 12780 C 12470 D 12160 E 11850 or recommended by OEM for this specified use 10 4/9/25 Enclosure: Do you require the transformer with or without an enclosure? Trailer mounted transformer, NEMA Type 3R weatherproof for outdoor use. No additional enclosure
| 11 | 4/25/25 | Should the winding material of the transformer be copper or aluminum? Based on the inquired transformer model, we recommend that the winding material be copper. | All electrical conductors associated with the load bank and transformer, including transformer winding and cables shall be copper. |
| 12 | 4/25/25 | How long is the cable required to connect the load box and the 12.47KV generator busbar? | 150 feet copper cables |
| 13 | 4/25/25 | Will the UPS System be tested for resistive-reactive load ? (Because in the latter case, the Load-Bank has to have two segregated/separable circuits ( R and LC) instead of single RLC to enable it for the multi-role capability of the testing generator as well as the UPS.) | Yes. UPS systems will be tested for reactive- resistive load |
| 14 | 4/25/25 | Would it be tested for resistive only? | No. |
| 15 | 4/25/25 | What is the usage purpose of the load bank? Could you please explain? |
| The Resistive-Reactive load bank and transformer will be used to test Generators and UPS systems. | |||
| 16 | 4/25/25 | What is the control type you prefer? Do you need a manual button control or HMI+PLC computer control type? | Control system must be HMI+PLC type approved or rated for outdoor use. |
17 4/25/25 What is the length of the power cables you need? 150 feet copper cables
Attachment N &"Courier,Regular"&12UNCLASSIFIED//FOUO
&"Courier"&12UNCLASSIFIED//FOUO
File details come from the government source that posted it. Updated .