IEC 62271-112:2021 PDF

High-voltage switchgear and controlgear - Part 112: Alternating current high-speed earthing switches for secondary arc extinction on transmission lines

First page of standard IEC 62271-112:2021

Open preview (PDF)

Title (English):

IEC 62271-112:2021

High-voltage switchgear and controlgear - Part 112: Alternating current high-speed earthing switches for secondary arc extinction on transmission lines

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 84
Publication date:: July 13, 2021
Edition:: IEC IS 62271 edition 2 version 1
ICS:: 29.130.10

Delivery type:

Full version35 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:35 €

Description (English):

IEC 62271-112:2021 applies to AC high-speed earthing switches (hereinafter termed HSES) designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having rated voltages of 550 kV and above. HSESs described in this document are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers. For more detailed information on HSESs, refer to Annex A. This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: The document has been updated to the second edition of IEC 62271-1:2017.

Technical details

Technical committee: SC 17A - Switching devices
SKU: IEC 62271-112:2021

Abstract

Overview

IEC 62271-112:2021 is the International Electrotechnical Commission standard that defines requirements for alternating current high-speed earthing switches (HSES) used for secondary arc extinction on transmission lines. Applicable to indoor and outdoor installations on systems rated 550 kV and above at 50 Hz and 60 Hz, this second edition (2021) updates the original 2013 edition and aligns with IEC 62271-1:2017. The HSES purpose is to extinguish the residual (secondary) arc that can persist after circuit-breaker fault clearing, improving reclosing reliability and grid safety.

Key Topics

Scope and definitions: formalizes terms such as secondary arc, single-/multi-phase auto-reclosing schemes, successive fault and HSES classes (e.g., M0 = 1 000 mechanical cycles, M1 = 2 000 cycles).
Ratings and service conditions: rated voltages, service frequencies and environmental/installation conditions for HSES operation.
Design and construction: mechanical, electrical and insulation design requirements tailored for very-high-voltage transmission applications.
Testing requirements: specified type tests and routine tests to verify performance (making/interruption of induced currents, withstand recovery voltages, mechanical endurance).
Selection and specification guidance: informative guidance (Clause 9 and Annex A) to help choose HSES based on system protection and auto-reclosing schemes.
Installation, maintenance and safety: rules for transport, storage, installation, operation and maintenance, plus safety provisions.
Annexes: Annex A provides background on HSES use; Annex B covers induced current/voltage conditions and special coupling scenarios.

Applications and Who Uses It

IEC 62271-112 is essential for:

Transmission system designers and planners specifying HSES for ultra-high-voltage lines.
Switchgear manufacturers designing HSES products to comply with international requirements.
Protection and control engineers integrating HSES into auto-reclosing schemes to mitigate secondary arcs.
Testing laboratories and certification bodies performing type/routine tests.
Utility asset managers and maintenance teams responsible for procurement, installation and lifecycle management of HSES.

Practical benefits include increased successful auto-reclose rates, reduced risk of restrike or sustained arcing after breaker operation, and clearer procurement/acceptance criteria.

Related Standards

Relevant cross-references cited in IEC 62271-112:

IEC 62271-1:2017 - Common specifications for AC switchgear and controlgear
IEC 62271-100 - AC circuit-breakers
IEC 62271-102 - Disconnectors and earthing switches
IEC 62271-200 / -203 - Metal-enclosed and gas-insulated switchgear standards

Keywords: IEC 62271-112, high-speed earthing switches, HSES, secondary arc extinction, transmission lines, high-voltage switchgear, 550 kV, auto-reclosing.

Related standards

Standards mentioned in the description

Abstract

Overview

Key Topics

Scope and definitions: formalizes terms such as secondary arc, single-/multi-phase auto-reclosing schemes, successive fault and HSES classes (e.g., M0 = 1 000 mechanical cycles, M1 = 2 000 cycles).
Ratings and service conditions: rated voltages, service frequencies and environmental/installation conditions for HSES operation.
Design and construction: mechanical, electrical and insulation design requirements tailored for very-high-voltage transmission applications.
Testing requirements: specified type tests and routine tests to verify performance (making/interruption of induced currents, withstand recovery voltages, mechanical endurance).
Selection and specification guidance: informative guidance (Clause 9 and Annex A) to help choose HSES based on system protection and auto-reclosing schemes.
Installation, maintenance and safety: rules for transport, storage, installation, operation and maintenance, plus safety provisions.
Annexes: Annex A provides background on HSES use; Annex B covers induced current/voltage conditions and special coupling scenarios.

Applications and Who Uses It

IEC 62271-112 is essential for:

Transmission system designers and planners specifying HSES for ultra-high-voltage lines.
Switchgear manufacturers designing HSES products to comply with international requirements.
Protection and control engineers integrating HSES into auto-reclosing schemes to mitigate secondary arcs.
Testing laboratories and certification bodies performing type/routine tests.
Utility asset managers and maintenance teams responsible for procurement, installation and lifecycle management of HSES.

Practical benefits include increased successful auto-reclose rates, reduced risk of restrike or sustained arcing after breaker operation, and clearer procurement/acceptance criteria.

Related Standards

Relevant cross-references cited in IEC 62271-112:

IEC 62271-1:2017 - Common specifications for AC switchgear and controlgear
IEC 62271-100 - AC circuit-breakers
IEC 62271-102 - Disconnectors and earthing switches
IEC 62271-200 / -203 - Metal-enclosed and gas-insulated switchgear standards

Keywords: IEC 62271-112, high-speed earthing switches, HSES, secondary arc extinction, transmission lines, high-voltage switchgear, 550 kV, auto-reclosing.

IEC 62271-112:2021 PDF

Technical details

Abstract

Overview

Key Topics

Applications and Who Uses It

Related Standards

Related standards

Abstract

Overview

Key Topics

Applications and Who Uses It

Related Standards

Related standards

High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear an…

High-voltage switchgear and controlgear - Part 100: Alternating current circuit-breakers

High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches

Corrigendum 1 - High-voltage swithgear and controlgear - Part 200: AC metal-enclosed switchgear and controlge…