IEEE Std C37.24-2017 cor1-2019 PDF
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St IEEE Std C37.24-2017 cor1-2019
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Ст IEEE Std C37.24-2017 cor1-2019
Original standard IEEE Std C37.24-2017 cor1-2019 in PDF full version. Additional info + preview on request
Full title and description
IEEE Std C37.24-2017/Cor 1-2019 — IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal‑Enclosed Switchgear (Corrigendum 1). This corrigendum corrects an error in the original 2017 guide that instructed users to read the wrong NOAA temperature column (monthly normal average instead of monthly normal maximum) for use in solar‑radiation related current‑capacity calculations.
Abstract
This document is Corrigendum 1 to IEEE Std C37.24‑2017. The underlying guide provides methods, tables and examples to evaluate the effect of solar radiation on outdoor metal‑enclosed switchgear and to derive continuous current capability adjustment factors based on local maximum monthly normal temperatures. Corrigendum 1 fixes the NOAA data‑column reference used in those calculations so users consult monthly normal maximum temperature values instead of monthly normal average values.
General information
- Status: Corrigendum to IEEE Std C37.24‑2017 (C37.24‑2017/Cor 1‑2019); the C37.24 family has subsequently been updated (see related standards).
- Publication date: Published 1 May 2019 (Corrigendum 1).
- Publisher: Institute of Electrical and Electronics Engineers (IEEE).
- ICS / categories: Switchgear and controlgear in general — ICS 29.130.01 (application category for switchgear).
- Edition / version: Corrigendum 1 to IEEE Std C37.24‑2017 (designation C37.24‑2017/Cor 1‑2019).
- Number of pages: Document available as an online corrigendum; library/catalog records indicate a 19‑page online resource for the corrigendum item.
Scope
The guide (and this corrigendum) is intended to assist engineers and specifiers in evaluating the effects of solar radiation on outdoor metal‑enclosed switchgear (including metal‑clad, metal‑enclosed interrupter switchgear, metal‑enclosed gas‑insulated switchgear, control switchboards, metal‑enclosed bus and pad‑mounted switchgear). It provides specific data in the form of continuous current capability factors tied to maximum monthly normal temperatures and gives sources and examples for obtaining those temperature values for locations in the U.S. and Canada. Corrigendum 1 ensures the correct NOAA temperature column (monthly normal maximum) is used in those calculations.
Key topics and requirements
- Correction to NOAA data reference: users must use monthly normal maximum temperature values (not monthly normal average values) when applying the standard's temperature‑based adjustment factors.
- Guidance on deriving continuous current capability adjustment factors for outdoor metal‑enclosed switchgear based on local temperature and solar radiation conditions.
- Tables and examples showing current‑temperature relationships and adjustment factors for various switchgear types and climates.
- Recommended data sources and procedures for obtaining location‑specific maximum monthly normal temperatures (U.S. and Canada).
- Application considerations for enclosure color/finish, ventilation, and installation orientation as they affect internal temperatures and current‑carrying capability (as addressed in the parent guide).
Typical use and users
This corrigendum and its parent guide are used by electrical engineers, utility planners, switchgear manufacturers, specification writers, testing labs and consultants who need to assess or specify the continuous current capabilities of outdoor metal‑enclosed switchgear under solar‑exposed installations. It is referenced when preparing equipment ratings, installation instructions and thermal performance assessments for outdoor switchgear.
Related standards
Related documents in the IEEE C37 family and switchgear guidance include the original IEEE Std C37.24‑2017 (guide) and earlier versions such as C37.24‑2003. IEEE has prepared a later revision (C37.24‑2025) that supersedes the 2017 edition; users should consult the current C37.24 series edition for the most recent consolidated guidance. Other C37 series standards covering switchgear, bus and related equipment may be referenced for complementary requirements.
Keywords
solar radiation, switchgear, metal‑enclosed switchgear, continuous current capability, NOAA maximum monthly normal temperature, corrigendum, thermal performance, enclosure ventilation, IEEE C37.24.
FAQ
Q: What is this standard?
A: It is Corrigendum 1 to IEEE Std C37.24‑2017 (designated IEEE Std C37.24‑2017/Cor 1‑2019), a correction to the 2017 IEEE guide for evaluating the effect of solar radiation on outdoor metal‑enclosed switchgear.
Q: What does it cover?
A: The parent guide covers methods, tables and examples to adjust continuous current capability of outdoor metal‑enclosed switchgear for solar radiation and ambient temperature effects; the corrigendum corrects the NOAA temperature column reference so calculational inputs use monthly normal maximum temperatures.
Q: Who typically uses it?
A: Electrical engineers, utility planners, switchgear manufacturers, specification writers, testing laboratories and consultants working on outdoor switchgear thermal performance and rating.
Q: Is it current or superseded?
A: The corrigendum was published in 2019 and applies to the 2017 guide; the IEEE C37.24 suite has been updated since and a later revision (C37.24‑2025) is indicated as superseding the 2017 edition. Users needing the latest consolidated guidance should consult the most recent C37.24 edition.
Q: Is it part of a series?
A: Yes — it is part of the IEEE C37 family of standards (switchgear, substations and protective relays) and specifically amends the C37.24 guide series on solar radiation effects for outdoor metal‑enclosed switchgear.
Q: What are the key keywords?
A: Solar radiation; outdoor switchgear; metal‑enclosed switchgear; current‑temperature relationship; continuous current capability; NOAA maximum monthly normal temperature; corrigendum.