SATPC0032745 Tab 10 BNJ_Redacted.pdf

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NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

NASA SHARED SERVICES CENTER

RECOMMENDATION AND DETERMINATION TO SOLICIT FROM ONE SOURCE

OR BRAND NAME

PICK ONE

Sole Source:

☐I recommend that NASA, NASA Shared Services Center negotiate with Vendor Name only for Enter

Supply or Service to be procured. The total estimated cost of this effort is Enter Dollar amount and the estimated period of performance or lead-time for delivery is Date.

OR

Brand Name Justification:

☒I recommend that NASA, NASA Shared Services Center negotiate with only with vendors who can provide the subject brand name from Keysight Technologies Inc. for the items listed below. The total estimated cost of this effort is and the estimated period of performance or lead-time for delivery is

8 weeks.

Requested Items:

1. 2x Keysight 7936A, 10 kW Regenerative DC Power System (Power Source)

a. Rack Mount Option

This recommendation is for the acquisition of supplies or services determined to be reasonably available from only one source/only one manufacture. Competition is impractical for the following reasons (please answer the questions below):

1. What are the reasons for soliciting only the suggested source/suggested brand name? Please provide the unique characteristics of the items or services along with the supporting rationale and the market research performed to substantiate your reason for the suggested source/brand name.

This Keysight regenerative/bidirectional DC source is the same as others currently used in the lab. The ones used in the lab are currently rack mounted. Alternative DC sources have different footprints and likely would necessitate a redesign of the lab equipment rack. The 160 VDC rating of this Keysight product is the one closest to the application value (136 VDC). Other regenerative DC sources capable of

136 VDC tend to be sized much higher than needed as shown in Table 1 (e.g. 200 VDC). These are oversized for our application and will result in a larger, more expensive box that may be difficult to integrate into the lab equipment rack.

2. What is the impact to the government if another vendor/brand is used? Include any dollar, schedule, or compatibility impacts if possible.

The impact of selecting another brand would be that the new equipment would require modifications in the test equipment rack in order to install. These modifiations will add schedule risk to the project.

Additional engineering and technician hours will be required for these modifications to incorporate an alternative DC source.

ADDITIONAL COMMENTS:

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Table 1: Review of alternative regenerative DC sources

Regen. Source

Manufacturer

VDC Rating Possibilities

(best option: closest rating above 136 VDC requirement highlighted)

Keysight1 80, 160, 500, …

Itech2 80, 300, 500, …

Chroma3 100, 600, 1200, …

Matsusada4 80, 120, 200, …

1https://www.keysight.com/us/en/products/dc-power-supplies/ate-system-power-supply/rp7900-series-regenerative-programmable-power-supplies-5kw-10kw.html 2https://rexgear.com/collections/power-supply/products/itech-it6000c-series-bidirectional-programmable-dc-power-supply 3https://www.chromausa.com/product/bidirectional-dc-power-supply-62000d/ 4https://www.matsusada.com/product/dc-power-supplies/regen/pbr/