AFFTC/PKAD Directorate of Contracting, 5 S Wolfe Ave, Edwards AFB, CA 93524-1185

36 -- THREE PHASE AIR INSULATED VACUUM CIRCUIT BREAKERS SOL F04700-97-T-5346 Update DUE 090897 POC Betty Sue Stevenson, Contract Negotiator (805)277-3900x2254: JOHN LEMACKS, Contracting Officer (805)277-3900x2253 WEB: On-line Acquisition Solicitation Information System, http://afftc_pk.elan.af.mil/scripts/xindex.asp. E-MAIL: click e-mail link to contact the POC, stevensb%pk@mhs.elan.af.mil. 1. THIS IS A MODIFICATION TO SYNOPSIS APPEARING ON 8/5/97 AND IS MODIFIED AS FOLLOWS: THE QUESTIONS ARE ANSWERED AS FOLLOWS: a. Question 1. The ABB part number specified is meaningless to everyone but ABB, and the specification describes only a basic breaker (which is essentially an electrically operated switch without any automatic tripping function). Do you want any operating options, I.E. metering, relays (trip, reclose, etc.) bushing current transformers (to operate the metering, relay(s), etc.) or etc? Answer: The Government requires the breaker to have the following: (3 ea) phase and (1 ea) ground over-current relays also auto trip and reclose relay. b. Question 2. The style # specified, 5BB1162M50360, is for a breaker with a 600 AMP (A) continuous current rating and that conflicts with the 1200A rating specified. Do you want a 600A or 1200A rating? Answer: The Government requires the breaker to be 1200 amp Vacuum, Sub-Station free standing type, 15kv. Capacitor trip with indicator light for open/close. c. Question 3. The style # also includes six (6) bushing mounted current transformers and a distribution protection relay which are needed to make the specified breakers operate as circuit breakers (see our Question #1) but are not specified. Do you want the current transformers and relay included in each breaker or not? Answer: The Government requires the current transformers in bushings: (3 bushings on line side and 3 bushings on load side) a total of 6 bushings with CTs. 2. THE TIME AND DATE SET FOR RECEIPT OF PROPOSALS IN EXTENDED TO: Date: 8 September 97 Time: 4:00 PM local time (0239)

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