IEEE Std C37.20.2-2022

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STANDARDS

IEEE Standard for Metal-Clad

Switchgear

IEEE Power and Energy Society

Developed by the

Switchgear Committee

IEEE Std C37.20.2™-2022

(Revision of IEEE Std C37.20.2-2015)

IEEE Standard for Metal-Clad

Switchgear

Developed by the

Switchgear Committee

of the

IEEE Power and Energy Society

Approved 21 September 2022

IEEE SA Standards Board

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

•

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3 Park Avenue, New York, NY 10016-5997, USA

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Engineers, Incorporated.

PDF: ISBN 978-1-5044-9225-6 STD25805

Print: ISBN 978-1-5044-9226-3 STDPD25805

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No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission

of the publisher.

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摘要：

IEEE Std C37.20.2-2022 是 IEEE 发布的关于金属封闭铠装开关设备与控制设备的最新标准规范，适用于额定电压在1kV至38kV之间的交流电力系统。该标准详细规定了金属铠装开关柜的结构设计、绝缘要求、温升限值、短路承受能力、内部电弧故障防护以及相关试验方法。作为电力行业重要的设备设计、制造与验收依据，C37.20.2-2022替代了前一版本，进一步提升了设备在复杂电网环境下的安全性与可靠性，尤其强化了对人员安全防护及电弧故障风险管理的要求。该标准广泛应用于发电厂、变电站、工业

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IEEE Std C37.20.2-2022

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