Ames Ionwave #2027-001 Addendum 2

City of Ames Seeks Electrical Engineering Services for Power Plant Arc Flash Study

The City of Ames Electric Services Department is seeking qualified firms to provide electrical engineering services for a comprehensive Arc Flash Study at its municipal Power Plant. - Government Buyer: - City of Ames, Electric Services Department (Purchasing Division) - Scope of Services: - Conduct a full Arc Flash Study for the Power Plant, including both the main plant and gas turbine facility - Analyze internal electrical distribution and protection systems, covering equipment from 125 VDC systems and MCC/UPS down to 110 VAC distribution, up to the Generator Step-Up transformer - Perform field verification, short circuit/fault current analysis, protective device coordination, and incident energy calculations per IEEE 1584-2018 and OSHA 269-2014 standards - Provide deliverables including a final report, summary tables, time-current characteristic curves, electronic arc flash label files (City staff will print/apply labels), and fully editable system model files - Update and use existing SKM (2014), Aspen transmission, and Milsoft WindMil distribution models; SKM preferred, but ETAP, CYME, and ArcPro are acceptable - Optional on-site training for Power Plant staff on arc flash safety and PPE requirements - Notable Requirements: - All deliverables must be sealed by a Professional Engineer licensed in Iowa - Professional liability insurance and affirmative action compliance required - Use of industry-standard modeling platforms (SKM preferred) - OEMs and Vendors Mentioned: - SKM Systems Analysis, Inc. (SKM Power Tools) - Operation Technology, Inc. (ETAP) - CYME International T&D (CYME) - ArcPro (by Kinectrics) - Aspen (by Aspen Inc.) - Milsoft Utility Solutions (WindMil) - No specific product part numbers or quantities are listed, as this is a professional services procurement - The awarded firm will receive existing system models and one-line diagrams for update and analysis

Description

The City of Ames is seeking proposals from qualified firms to provide electrical engineering services for an Arc Flash Study at the Power Plant for the Electric Services Department. The scope includes analyzing the plant's internal electrical distribution and protection system, performing field verification, analysis, reporting, labeling, and optional training to meet OSHA requirements and industry standards. Deliverables include a final report, short circuit and coordination results, time-current curves, arc flash labels (electronic files), and complete system model files. The study will cover equipment including 125 VDC systems and will end at the Generator Step-Up transformer.

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