Project Description

Arc Flash Hazard Planning and Analysis

The United States and Canada

Clark Dietz has extensive experience with arc flash planning and analysis throughout the United States and Canada. We assisted the State of Wisconsin, Department of Facilities Development, in creating a master plan and implementation approach for their 7,000 buildings and helped to develop the State specification section 26 05 73. We then proceeded to complete the arc flash studies, training, and electrical evaluations for several university campuses totaling over 10 million building square feet.

Our approach to any arc flash analysis project is to bring together four main elements of expertise:

  • “Qualified” staff for field investigations and data collection
  • Experts with actual experience in completing arc flash analysis
  • Experts in electrical systems design and analysis
  • Experts in electrical safety training

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We provide the following typical scope of services for arc flash hazard analysis:

Field Data Collection

  • Field data collection by qualified personnel (as defined by NFPA 70E)
  • Verify installed condition of one-line diagrams
  • Determine feeder conductor lengths
  • Confirm feeder conductor sizes
  • Document size, manufacturer, and settings of relays, circuit breakers and fuses
  • Document primary and secondary voltages, and kVA and impedance ratings of transformers
  • Keep a running list of Code related items, safety issues, equipment condition deficiencies, and maintenance items observed while collecting field data

Study and Analysis

  • Data entry and system one-line modeling using SKM Power Tools software
  • Coordination with electric utility regarding available fault current on each component
  • Short circuit and equipment duty verification study to determine whether electrical equipment is properly rated to withstand and interrupt available short circuit duty per ANSI Standards and NEMA/UL/NEC requirements
  • Selective coordination study: time current curves with recommendations of trip settings, relay settings, and fuse types and sizes
  • Arc flash study to determine maximum incident energies, arc flash boundaries, and PPE requirements for each required component in the system. Study results can be integrated with 70E compliant work permits as part of an ongoing safety program
  • System upgrade recommendations and actions for corrective measures

Analysis and procedures shall comply with the following standards and recommended practices for power system studies:

  • NFPA-70E Standard for Electrical Safety in the Workplace
  • IEEE-1584 Arc Flash Hazard Calculations Standards
  • IEEE-242 “Buff Book” Protection and Coordination of Industrial Power Systems
  • IEEE-399 “Brown Book” Power System Analysis
  • IEEE-141 “Red Book” Electric Power Distribution for Industrial Plants

Our Clients:

U.S. Department of Veteran Affairs – Palo Alto, CA – 32 buildings, 969 buses

U.S. Department of Veteran Affairs – Tomah, WI – 35 buildings, 572 buses

U.S. Department of Veteran Affairs – Austin, TX – 692 buses

State of Wisconsin – UW-Stevens Point – 38 buildings, 1208 buses

State of Wisconsin – UW-River Falls – 55 buildings, 1342 buses

State of Wisconsin – UW-Superior – 20 buildings, 757 buses

State of Wisconsin – UW-Eau Claire – 27 buildings, 1579 buses

State of Wisconsin – UW-Stout – 31 buildings, 1342 buses

Columbia Correctional Institution – Portage, WI – 262 buses

Wisconsin Public Service – Caribou, Maine

Wisconsin Public Service – New Brunswick, Canada

Marathon County – WI – 40+ buildings

Metropolitan Council on Engineering Services – Minneapolis, MN – 26 buses

ThyssenKrupp – Etowah, TN

MAG Giddings & Lewis – Fond du Lac, WI – 1500+ buses

Wausau School District – Wausau, WI – 22 buildings

Fox River Water Reclamation District – Elgin, IL – 462 buses

Perdue University – West Lafayette, IN

Contact Paul Zouski for more information on our Arc Flash services.