IEEE Std C37.09-2018 cor1-2021 PDF

Full title and description

IEEE C37.09-2018/Cor 1-2021 — IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers with Rated Maximum Voltage Above 1000 V: Corrigendum 1. This document is a corrigendum to IEEE Std C37.09-2018 and contains technical and editorial corrections and clarifications to the 2018 test-procedure standard for AC high-voltage circuit breakers (indoor and outdoor types) having rated maximum voltages above 1 000 V.

Abstract

This corrigendum (Corrigendum 1, 2021) to IEEE Std C37.09-2018 provides corrections and clarifications intended to remove ambiguities and fix errors discovered after publication of the 2018 standard. Revisions include corrections to formulae and symbols, harmonization of terms and cross‑references with related C37 series standards, corrections to specific test-procedure steps and figures, and changes to numerical limits and test classification statements so that test procedures are clear and consistent for manufacturers, test laboratories and utilities performing type, routine and production tests on AC high‑voltage circuit breakers.

General information

• Status: Active (corrigendum to an active standard)
• Publication date: Corrigendum 1 released 3 June 2021 (C37.09-2018 originally approved December 5, 2018 and published April 11, 2019).
• Publisher: Institute of Electrical and Electronics Engineers (IEEE), IEEE Power & Energy Society / PE/SWG Switchgear committee.
• ICS / categories: 29.130.10 — High voltage switchgear and controlgear (Switchgear and controlgear).
• Edition / version: Corrigendum 1 (2021) to IEEE Std C37.09-2018 (original 2018 edition).
• Number of pages: 21 (corrigendum document).

Scope

Applies to test procedures for AC high‑voltage circuit breakers with rated maximum voltages above 1 000 V (typical maximum voltages covered range from a few kV up through transmission levels), covering verification of assigned ratings such as continuous current, dielectric withstand, short‑circuit current, transient recovery voltage (TRV), capacitor‑switching duties, mechanical endurance and production tests. The corrigendum clarifies procedural details, numerical limits, symbols and cross‑references in the original C37.09-2018 text; it does not expand the original scope to include equipment types excluded by C37.09 (for example, generator circuit breakers addressed in IEC/IEEE documents).

Key topics and requirements

• Corrections to numeric limits and ratios used in single‑phase capacitive switching procedures (e.g., ratio of zero to positive sequence currents requirement).
• Clarification and correction of references and cross‑references to IEEE Std C37.04 and other C37 series documents so terminology and requirements match across standards.
• Harmonization of notation and symbols throughout the standard (for example, consistent use of Ur for rated voltage in equations).
• Editorial and procedural fixes in specific clauses (examples: 4.1.2, 4.5.7, 4.5.8.1, 4.8.2.x and 4.10.9.x) to remove ambiguity about required test steps, measurement conditions and reporting.
• Corrections to figures and tables (figure titles, example grounding conditions, and arcing‑window multipliers such as corrections to Table 5).
• Clarifications on which tests are to be performed at minimum control voltage and how to average impulse values relative to rated values.
• Corrections to the electrical‑degree steps for capacitance‑switching duties (specified steps for single‑ and three‑phase switching) and other duty timing details.
• Minor editorial corrections and punctuation changes for clarity and to ensure consistent test classification statements in the Scope and clauses.

Typical use and users

Used by manufacture and design engineering teams at breaker manufacturers, independent high‑voltage test laboratories, utility testing/maintenance organizations, commissioning engineers, standards committees, and third‑party certifiers. The corrigendum is applied by anyone implementing the IEEE C37.09 test procedures or preparing test reports to ensure test execution and reporting follow the corrected, unambiguous instructions.

Related standards

Related documents and standards commonly used alongside this corrigendum include: IEEE Std C37.09-2018 (original standard), IEEE Std C37.04 (Ratings and requirements for AC high‑voltage circuit breakers), IEEE Std 4 (High‑voltage testing techniques), IEC/IEEE 62271‑37‑013 (generator circuit breaker test guidance where applicable), and other C37 series documents (rating, selection and application guidance for switchgear and breakers). Implementers should consult the current consolidated versions of C37.09 and related C37 series standards for full context.

Keywords

high‑voltage circuit breaker, C37.09, test procedures, corrigendum, dielectric withstand, transient recovery voltage (TRV), short‑circuit current, capacitor switching, arcing time/window, mechanical endurance, production test, rated voltage (Ur), switchgear testing.

FAQ

Q: What is this standard?

A: It is Corrigendum 1 (2021) to IEEE Std C37.09‑2018 — a corrections document that amends and clarifies the 2018 IEEE test‑procedure standard for AC high‑voltage circuit breakers with rated maximum voltage above 1 000 V.

Q: What does it cover?

A: The corrigendum fixes technical and editorial errors in the original C37.09‑2018 text, providing corrected numerical values, clarified procedural steps, corrected figures/tables and harmonized terminology and references so that breaker type, routine and production tests are executed and reported consistently.

Q: Who typically uses it?

A: Breaker manufacturers, high‑voltage test laboratories, utilities, commissioning engineers, and regulatory/standards personnel who perform or witness high‑voltage circuit breaker testing and produce test reports.

Q: Is it current or superseded?

A: Corrigendum 1 (2021) is an official amendment to the 2018 edition and remains part of the current C37.09 suite. Users should confirm whether a later amendment or an amendment‑consolidated edition (or a 2025 amendment listed for C37.09a‑2025) has been published for the absolute latest text before relying on this corrigendum for compliance or procurement.

Q: Is it part of a series?

A: Yes — IEEE Std C37.09 is part of the IEEE C37 family of standards addressing circuit breakers, switchgear and related test procedures and ratings (for example, C37.04 for ratings and requirements). The corrigendum should be used in conjunction with the base C37.09‑2018 document and other applicable C37 standards.

Q: What are the key keywords?

A: High‑voltage circuit breaker testing, C37.09, corrigendum, TRV, dielectric test, short‑circuit test, capacitor switching, mechanical endurance, arcing window, rated voltage (Ur), switchgear test procedures.