NCCOSC RDTE Division, Code D214B, 53570 Silvergate Avenue, Bldg. A33, San Diego, CA 92152-5113

61 -- 83 KVA DC/AC STATIC INVERTERS SOL N66001-97-R-0059/0001 POC Contract Specialist, Ms. Mary Wolff, Code D213, (619)553-4516. Contracting Officer, Mr. L. Hunt, (619)553-4541. The purpose of this amendment is as follows: 1. Provide the answers for the following questions. (a) Question: Is the 25 inch hatch round or square, and what is the thickness? Answer: The 25" hatch is round and its "thickness" (length over which a device would have to be less than 25") would be about 1 foot. (b) Question: Respond true or false. Do two 83 KVA inverters fit inside the footprint of one motor generator (i.e. 30 in. x 60 in.)? Answer: True. (c) Question: Please confirm that DC input to inverter is a range of 175 to 350 volts? Proper function is required when DC is only 175, or when DC is as high as 350 volts. Answer: The proper function of the inverters is required over the entire range of 175-355 VDC. (d) Question: Is NEMA 4x enclosure (stainless steel) preferred over NEMA 4? Answer: Stainless is not preferred over any other material. No other equipment in the space is predominantly stainless. (e) Question: What is maximum humidity, in % relative? Answer: The maximum relative humidity is 75%. (f) Question: Where are preferred entrance and exit points for DC input and AC output? Top, side, or bottom? Answer: The preferred entrance and exit points for the DC inputs/AC outputs would be any side, NOT the top or bottom. 2. The Hour and Date specified for Receipt of Offers is changed FROM 3:00 p.m. local time 12 May 97 TO 3:00 p.m local time 16 MAY 97. 3. FAR Clause 52.215-18 Facsimile Proposals is hereby added. See Note(s): 1. (0132)

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