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Switchgear


Switchgear is made up of electrical disconnect switches, fuses, or circuit breakers that control, protect, and isolate electrical equipment. Switchgear is used to de-energize equipment to allow maintenance work to be done and to clear faults downstream.​

Products include:

  • Breakers
  • High-voltage fuses
  • High-voltage outdoor power circuit breakers and switches
  • Low- and medium-voltage power circuit breakers
  • Medium-voltage load interrupter switches
  • Pad-mounted switching equipment
  • Power switchgear assemblies
  • Reclosers
  • Sectionalizers

NEMA develops product Standards and advocates technical and industry positions that are in the best interests of Member companies, the industry, and the users of their products. Members generate active, effective, and organized marketing and technical programs.​

Activities

Technical

  • Develops and maintains proprietary Standards for the Switchgear Section (i.e., SG 4 Alternating Current High Voltage Circuit Breakers, SG 10 Guide to OSHA and NFPA 70E Safety Requirements When Servicing and Maintaining Medium-Voltage Switchgear, Circuit Breakers,  and Medium-Voltage Controllers Rated above 1000 V, SG 11 Guide for Handling and Maintenance of AC Outdoor High Voltage Circuit Breakers, and NEMA 260 Safety Labels for Pad-Mounted Switchgear and Transformers Sited in Public Areas); maintains the secretariat position within ANSI C37; coordinates input into UL 1066, Institute of Electrical and Electronics Engineers (IEEE), and other Standards/code bodies
  • Provides input to International Electrotechnical Commission (IEC) Technical Committees and administers the U.S. Technical Advisory Group for several IEC Technical Committees to promote harmonization with European and global standards
  • Administers Standards Testing Laboratory North America (STLNA) activities group to develop consistency for high-voltage product testing and promote global harmonization of switchgear and circuit breaker testing Standards
  • Administers the CANENA (Council for Harmonization of Electrotechnical Standards of the Nations in the Americas) Technical Harmonization Subcommittee Working Group for transfer switches over 750 volts and low voltage power circuit breakers to promote harmonization of \switchgear standards throughout the Americas   ​

Advocacy​

  • Lobbies for federal and state policies that promote grid build-out and grid modernization, including support for federal infrastructure legislation, siting and permitting of transmission lines, and commenting on state public utility commission (PUC) dockets
  • Promotes adoption and harmonization of key Standards by ANCE (Mexico's national Standards and certification body)
  • Provides intelligence on the privatization of the Mexican power grid, including access to Mexico's new Standards regulator for the power grid

Applications

  • Utility distribution circuits
  • Utility and industrial substations
  • Microgrids, distributed energy resources, and renewable energy systems
  • Buildings with medium-voltage circuit breakers for distribution circuits
  • For industrial applications, a transformer and switchgear may be combined in one housing​

Resources

Staff Contact

Related Manufacturers

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