Location: Washington, U.S.

Segment: Hydropower-producing dam

Problem: The station service switchgear was over dutied.

Solution: Upgrades were made to the switchgear.

A large, federally run dam in the Pacific Northwest containing twenty-seven generators, is the second largest hydropower-producing dam in the United States. This facility, located in Washington, determined that its station service switchgear was over dutied due to various expansions within the facility. Eaton® Engineering Services & Systems (EESS) obtained an order to upgrade the interrupting rating of this Allis Chalmers switchgear from 150MVA to 250MVA. This was accomplished through the following steps:

1. Taking detailed field measurements of existing bus bracing, bus configuration and cable supports,

2. Using this data to perform a computer analysis to define the maximum rating for the currently configured switchgear, and Location: Washington, U.S. Segment: Hydropower-producing dam Problem: The station service switchgear was over dutied. Solution: Upgrades were made to the switchgear.

3. Design and installation of new bus support windows, bus bracing and cable supports to obtain a rated 250MVA. Additionally, all the circuit breakers were replaced with modern roll-in replacements having the appropriate interrupting rating.

Eaton’s Electrical Services & Systems

Eaton’s engineering and consulting services focus on understanding your business requirements and setting strategies for your power system to satisfy them. Our engineers and consultants can help diagnose problems identify ways to improve performance, or transform concepts into flexible, practical solutions that can improve productivity and capital utilization. We can help keep your power system safe, efficient, reliable and up-to-date. Dealing with Increased Fault Levels in Hydro Generating Plants The Eaton global service team is one of the largest and most experienced teams of power system engineers in the industry, with industry-standard software and advanced modeling and analysis capabilities at our fingertips. Our comprehensive portfolio of design services includes safety studies, energy management audits, and power quality and reliability audits. With Eaton’s help defining strategies for your power system, you’ll witness a range of business benefits, from reduced costs to more effective use of capital. Our engineering and consulting services help you manage your power system as a strategic resource that can give you a competitive advantage. Call 1-800-498-2678 to get expert support for powering and controlling your business. For more information, visit: www.eaton.com/EESS