IEEE C37.20.2:2022

Committee/Society: IEEE Power and Energy Society/Switchgear

Abstract: Metal-clad (MC) medium-voltage switchgear that contains drawout electrically operated circuit breakers is covered. MC switchgear is compartmentalized to isolate components such as instrumentation, main bus, and both incoming and outgoing connections with grounded metal barriers. Ranges from 4.76 kV to 48.3 kV with main bus continuous current ratings of 1200 A, 2000 A, 3000 A, and 4000 A are the rated maximum voltage levels for metal-clad switchgear . Associated control, instruments, metering, relaying, protective, and regulating devices, as necessary, are also contained by MC switchgear. Service conditions, ratings, temperature limitations and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and applications are discussed.

Keywords: control, cumulative loading, current transformers, drawout, IEEE C37.20.2, indoor, instrumentation, load current-carrying, metal-clad (MC) switchgear, metal-enclosed (ME) power switchgear, outdoor, protection, switchgear assemblies, transformer accuracy, voltage transformers

Multimedia: N

Subscription Package: Power Switchgear, Circuits and Fuses

IEEE Normative references: 62271-37-013-2021, 4-2013, 693-2018, C37.04-2018, C37.06.1-2017, C37.09-2018

Non-IEEE Normative references: ANSI C37.54, American National Standard for Indoor Alternating Current High-Voltage Circuit Breakers Applied as Removable Elements in Metal-Enclosed Switchgear--Conformance Test Procedures.

ANSI C37.55, American National Standard for Medium-Voltage Metal-Clad Switchgear- Assemblies--Conformance Test Procedures.

ANSI Z535.4, American National Standard for Product Safety Signs and Labels.

ANSI/NEMA CC l, Electric Power Connections for Substations.

ANSI/UL 94, Standard for Safety for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances.

ANSI/UL 486A-486B, Standard for Safety for Wire Connectors.

ANSI/UL 510, Standard for Safety for Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape.

Life Cycle: Revision of IEEE C37.20.2-2015

Publication Type: IEEE Standard

Publication Date: 2023-01-13

Page Count: 94