RFI and Responses GA Spillway Transformer and Disconnects.pdf
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- Solicitation number
- W9128F24Q0055
About this file
This document contains Questions and Answers related to Solicitation #WQ9128F24Q0055 for the Garrison Dam Spillway Transformers and Disconnects Replacement project. The key details are:
The solicitation is for a supply contract to replace the existing 13.8kV/480V spillway transformers, disconnect switches, and motor control centers at the Garrison Dam. The new transformers will be delta-wye configuration, and the size will be determined based on available space, access, and conductor ampacity. High resistance grounding will be added to both transformers. The existing switchboard and motor control center will also be replaced.
The questions and answers provided clarify the required breaker sizes and trip ratings, as well as specifications for the horizontal bus amps and main device breaker trip ratings. A site visit can be arranged by contacting the contracting office.
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Questions and Answers
Garrison Dam Spillway Transformers and Disconnects Replacement
Solicitation # WQ9128F24Q0055
30 July 2024
1. Per 2.4.1 the solicitation did not include breaker sizes or trip ratings. Can the customer provide for breakers sizes and trip ratings required for #3 through #14.
USACE Response: See document attachment in SAM.gov titled “Motor Control Center
Configuration” for breaker sizes and trip ratings.
2. Please address missing horizontal bus amps and the main device breaker trip ratings.
USACE Response: See following paragraph in specification 26 28 00.00 10:
2.8.2.1 Horizontal Bus
Provide each control center assembly with a three-phase main horizontal bus, with a continuous current rating not less than 600 amperes, located across the top of each vertical section. Drill the end of horizontal buses for future extensions.
File details come from the government source that posted it. Updated .