IEC TR 62271-305:2009 PDF

Name: IEC TR 62271-305:2009 — High-voltage switchgear and controlgear - Part 305: Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV
SKU: IEC TR 62271-305:2009
Price: 35 EUR
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High-voltage switchgear and controlgear - Part 305: Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV

Название (английский):

IEC TR 62271-305:2009

High-voltage switchgear and controlgear - Part 305: Capacitive current switching capability of air-insulated disconnectors for rated voltages above 52 kV

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 17
Дата публикации:: 25 ноября 2009 г.
Издание:: IEC TR 62271 edition 1 version 1
ICS:: 29.130.10

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Описание (английский):

IEC/TR 62271-305:2009(E) applies to high-voltage air-insulated disconnectors for rated voltages above 52 kV. The report describes the capacitive current switching duty and provides guidance on laboratory testing to demonstrate the switching capability. Air-insulated disconnectors equipped with auxiliary interrupting devices are included under this scope. The contents of the corrigendum of June 2017 have been included in this copy.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты IEC

Overview

IEC TR 62271-305:2009(E) is a technical report from the International Electrotechnical Commission (IEC) that addresses the capacitive current switching capability of air‑insulated disconnectors for rated voltages above 52 kV. It describes the capacitive switching duty, gives guidance for laboratory testing to demonstrate switching capability (including air‑insulated disconnectors with auxiliary interrupting devices), and includes the corrigendum of June 2017.

Key SEO phrases: IEC TR 62271-305, capacitive current switching, air‑insulated disconnectors, high‑voltage testing, rated voltages above 52 kV.

Key Topics

Scope and intent: Defines testing guidance for air‑insulated disconnectors where capacitive charging currents exceed historically assumed values (0.5 A).

Test arrangement: Disconnector mounted on its support, motor operation only (at minimum supply voltage), resistance checks and no‑load operations before testing.

Test parameters:

Rated phase‑to‑earth test voltage (±5% tolerance).
Test current agreed between manufacturer and user (±10% tolerance).
Capacitance ratio C_S/C_L tolerance ±20%.
Tests may be at 50 Hz or 60 Hz (equivalent).

Test circuit and alternatives: Principal test circuit defined (source inductance L, supply and load capacitances C_S and C_L); alternative arrangements described in Annex C for practical laboratory limitations.

Test procedure:

Twenty close‑open (CO) operations per test current with no trapped charge on the load capacitance.
Recovery voltage maintained for 10 s after full opening.
Measurements required: source voltage, load dc/transient overvoltages, current, arc duration, and video recording of arc propagation.

Performance criteria:

Disconnector must interrupt capacitive current before moving blades reach fully open.
No earth faults or phase‑to‑phase faults in three‑phase tests.
Guidance on when single‑phase tests suffice and when three‑phase tests are necessary (e.g., excessive arc reach).

Applications

Who uses IEC TR 62271-305:

High‑voltage switchgear manufacturers validating disconnector designs.

Laboratory test houses developing test programs for capacitive switching.

Transmission utilities and designers specifying disconnector switching capability for lines and station equipment.

Procurement and standards engineers writing requirements for air‑insulated disconnectors at voltages >52 kV.

Practical value: helps ensure reliable interruption of capacitive charging currents, informs specification of disconnector ratings, and reduces risk of unacceptable arcing, overvoltages or equipment damage.

Related Standards

IEC 62271-1: High‑voltage switchgear and controlgear – Part 1: Common specifications.

IEC 62271-102: High‑voltage switchgear and controlgear – Part 102: AC disconnectors and earthing switches (includes gas‑insulated disconnector testing provisions).

For detailed test circuits, capacitive charging current tables and analysis, refer to Annexes A–C and the full IEC TR 62271-305 text.

IEC TR 62271-305:2009 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

Технические детали

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