C800556 – NSAT Modernization
Concourse N Arc Flash Mitigation
Item No.
8d_supp
Date of Meeting May 10, 2022
Purpose & Scope
Purpose:
Supply and install the following equipment and monitoring system for arc flash
mitigation at the south main power center in the concourse:
Project Scope:
• Two (2) new appropriately rated arc flash circuit breakers
• The modifications to the switchgear to accept the 2 new circuit breakers
• Two (2) circuit breaker relays for primary breaker protection
• Two (2) control power transformers
• Two (2) sets of 3 current transformers for power monitoring
• Perform commissioning of the switchgear to validate the arc flash incident levels
desired are achieved
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North Satellite – Arc Flash Mitigation
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Schedule
CIP: C800556
Key Schedule Milestones:
• Design Start: Q2 2021
• Construction Start: Q3 2022
• In-Use Date: Q4 2022
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Risks and Mitigation
• Risk: Safety
– Mitigation: Ensuring the proper breakers are installed to mitigate the arc flash levels
• Risk: Schedule
– Mitigation: Maintaining the construction schedule to promote safety
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Action Requested
Request Commission authorization for the Executive Director to
(1) Use Port of Seattle crews, as well as small and major works on-call
contracts to perform the construction work and;
(2) advertise and execute a major on-call construction contract for hazard
mitigation in the south power center of Concourse N
The total estimated project cost is $1,000,000
This work is being completed as part of the original North Satellite
Modernization at Concourse N project.
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