Active PAR

PC37.20.7

Recommended Practice for Testing Switchgear with Rated Voltages Up to 52 kV for Internal Arcing Faults

This recommended practice establishes methods by which equipment may be tested for resistance to the effects of arcing due to an internal fault. Equipment types covered in this recommended practice include metal-enclosed switchgear as defined by IEEE Std C37.20.1™, IEEE Std C37.20.2™, IEEE Std C37.20.3™ and IEEE Std C37.20.9™; metal-enclosed bus as defined by IEEE Std C37.23™; medium-voltage ac controllers as defined by UL 347; motor control centers as defined by UL 845; switchboards as defined by UL 891; and metal-enclosed medium-voltage air-insulated circuit breakers for outdoor application defined by IEEE Std C37.04™ (see note). This recommended practice applies only to equipment utilizing air or other insulating gas as the primary insulation medium and rated 52 kV ac or below. It applies to both indoor and outdoor equipment; however, special consideration should be given to the building size and construction for indoor applications (not fully addressed by this document). The tests and assessments described in this recommended practice are only applicable to arcing faults occurring entirely in air within the enclosure when doors and covers are properly secured in accordance with the rated accessibility type. This recommended practice does not apply to arcing faults that occur within components of the equipment, such as instrument transformers, sealed interrupting devices, fuses, and so on. Designs that meet the requirements of this recommended practice will be referred to as arc-resistant. NOTE–These circuit breakers are sometimes referred to as dead-tank circuit breakers

Sponsor Committee
PE/SWG - Switchgear
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Status
Active PAR
PAR Approval
2023-02-15
Superseding
C37.20.7-2017

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/SWG - Switchgear
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Working Group
SASC-WG_C37.20.7 - SASC - IEEE Working Group Arc Fault Testing
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IEEE Program Manager
Jennifer Santulli
Contact
Working Group Chair
Dan Hrncir

Other Activities From This Working Group

Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.


No Active Projects

Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.


C37.20.7-2017

IEEE Guide for Testing Switchgear Rated Up to 52 kV for Internal Arcing Faults

Procedures for testing and evaluating the performance of switchgear for internal arcing faults is covered. A method of identifying the capabilities of this equipment is given. Service conditions, installation, and application of equipment are also discussed. As used in this document, the term switchgear is used as a general term covering switching and interrupting devices and their combination with associated control, instrumentation, metering, protective and regulating devices, assemblies of those devices with associated interconnections, accessories, and supporting structures used primarily in conjunction with the generation, transmission, distribution, and conversion of electrical power.

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C37.20.7-2017/Cor 1-2021

IEEE Guide for Testing Switchgear Rated up to 52 kV for Internal Arcing Faults–Corrigendum 1

A procedure for testing and evaluating the performance of switchgear for internal arcing faults is covered. A method of identifying the capabilities of this equipment is given. Service conditions, installation, and application of equipment are also discussed. As used in this document, the term switchgear is used as a general term covering switching and interrupting devices and their combination with associated control, instrumentation, metering, protective and regulating devices, assemblies of those devices with associated interconnections, accessories, and supporting structures used primarily in conjunction with the generation, transmission, distribution, and conversion of electrical power.

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These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.


C37.20.7-2007

IEEE Guide for Testing Metal-Enclosed Switchgear Rated Up to 38 kV for Internal Arcing Faults

Revision of IEEE Std C37.20.7-2001. A procedure for testing and evaluating the performance of metal-enclosed switchgear for internal arcing faults is covered. A method of identifying the capabilities of this equipment is given. Service conditions, installation, and application of equipment are also discussed.

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C37.20.7-2007/Cor 1-2010

IEEE Guide for Testing Metal-Enclosed Switchgear Rated up to 38 kV for Internal Arcing Faults Corrigendum 1

This corrigendum corrects technical errors found in IEEE Std C37.20.7-2007 during use in laboratories concerning current values and arc initiation in low-voltage (LV) testing and supply frequency for all equipment.

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These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.


No Inactive-Withdrawn Standards

These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.


No Inactive-Reserved Standards
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