IEC 62271-109-2019 PDF

Full title and description

IEC 62271-109:2019 — High-voltage switchgear and controlgear — Part 109: Alternating-current series capacitor by-pass switches. This international standard specifies ratings, performance criteria, design and testing requirements for AC series capacitor by‑pass switches intended for outdoor installation and for operation on three‑phase 50 Hz and 60 Hz systems with voltages above 52 kV; it also covers operating devices and auxiliary equipment associated with these by‑pass switches.

Abstract

This third edition (2019) is a technical revision of the previous edition (2008) and Amendment 1:2013. The 2019 edition restructures the document in line with edition 2.0 of IEC 62271-1, aligns rated voltage assignation with IEC 60143-1, clarifies rated continuous current for compensated/uncompensated lines, updates time‑quantity and mechanical load sections (following IEC 62271-100 amendments), and adds additional rules and clarifications for impulse testing and vacuum interrupters. The standard defines type and routine tests (dielectric, partial discharge, continuous current, short‑time and peak withstand, RIV, mechanical, etc.) and acceptance criteria for by‑pass switches.

General information

• Status: International Standard (published).
• Publication date: 8 April 2019.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 29.130.10 (High-voltage switchgear and controlgear).
• Edition / version: Edition 3.0 (2019).
• Number of pages: 276 pages.

(Product metadata and bibliographic details as published by IEC.)

Scope

IEC 62271-109:2019 applies to alternating‑current series capacitor by‑pass switches designed for outdoor installation and for operation at 50 Hz and 60 Hz on three‑phase systems with voltages above 52 kV. It is limited to by‑pass switches for three‑phase operation and includes requirements for the main switching device, associated operating mechanisms, control and auxiliary circuits, protective features, mechanical and dielectric performance, and type/routine testing needed to verify conformity. The edition cancels and replaces the 2008 edition and its 2013 amendment.

Key topics and requirements

• Definitions and ratings: rated voltage, rated insulation level, rated continuous current (including guidance for compensated and uncompensated lines), rated short‑time and peak withstand currents, rated time quantities.
• Service conditions and environmental requirements for outdoor installation (including creepage distances and degrees of protection for enclosures).
• Design and mechanical requirements: static mechanical loads, simultaneity within a pole, operation limits, locking and position indication, corrosion and fire‑hazard considerations.
• Operating devices and auxiliaries: requirements for shunt closing/opening releases, under‑voltage releases, multiple releases, power consumption and stored energy operation, manual actuators and interlocks.
• Insulation and dielectric tests: wet and dry dielectric tests, partial discharge, impulse testing (with added rules for vacuum interrupters), radio interference voltage (RIV) testing.
• Current‑related tests: continuous current heating tests, making and by‑pass making current tests with damping tolerances, short‑time and peak withstand current tests.
• Verification and type tests: requirements for type test reports, criteria for passing tests, verification of IP coding, filling/tightness tests for fluids and gases.
• Marking, documentation and nameplate requirements, and EMC considerations.

These topics reflect the technical changes introduced in the 2019 edition and the standard’s test and documentation expectations.

Typical use and users

Primary users are manufacturers of high‑voltage switching devices, utilities and transmission system operators, substation designers and consulting engineers, independent test laboratories, and procurement/compliance teams responsible for specifying, approving or verifying alternating‑current series capacitor by‑pass switches for transmission networks. The standard is used to design, type‑test, accept and maintain by‑pass switches that form part of series‑compensated transmission lines.

Related standards

IEC 62271-109:2019 is part of the IEC 62271 series (high‑voltage switchgear and controlgear) and references/aligns with other IEC standards, notably IEC 62271-1 (Common specifications), IEC 60143-1 (Series capacitors for power systems — rated voltage rules), IEC 62271-100 (switches for rated voltages above 1 kV), IEC 60060 series (high‑voltage test techniques), IEC 60071 (insulation coordination) and related parts such as IEC 62271-200 and IEC 62271-203 where applicable. National adoptions (EN IEC versions) exist for some regions.

Keywords

series capacitor, by‑pass switch, high‑voltage switchgear, alternating current, type tests, dielectric testing, impulse test, making current, IEC 62271, outdoor installation, transmission line compensation.

FAQ

Q: What is this standard?

A: IEC 62271-109:2019 is the international standard that sets technical, testing and performance requirements for alternating‑current series capacitor by‑pass switches used on three‑phase outdoor high‑voltage systems above 52 kV.

Q: What does it cover?

A: It covers ratings, service conditions, mechanical and electrical design requirements, operating devices and auxiliary equipment, marking and documentation, and a comprehensive suite of type and routine tests (dielectric, partial discharge, RIV, continuous current, short‑time and peak withstand, mechanical tests, etc.) needed to verify conformity.

Q: Who typically uses it?

A: Manufacturers, transmission utilities, substation designers, independent testing laboratories, and procurement/compliance teams use the standard to design, test, specify and accept series capacitor by‑pass switches.

Q: Is it current or superseded?

A: The 2019 document is Edition 3.0 and cancels and replaces the 2008 edition and its 2013 amendment; the IEC product metadata lists the publication date as 8 April 2019 and indicates a stability date (targeted review) through 2030. Users should verify national adoptions or later amendments/editions if absolute currentness is required.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62271 series for high‑voltage switchgear and controlgear. It is intended to be used together with IEC 62271-1 (common requirements) and with other related IEC high‑voltage test and equipment standards such as IEC 60143-1, IEC 60060 series and IEC 62271-100.

Q: What are the key keywords?

A: Series capacitor, by‑pass switch, high‑voltage switchgear, outdoor installation, dielectric test, impulse test, making current, IEC 62271-109.