IEC 61326-2-4-2020 PDF

Full title and description

Electrical equipment for measurement, control and laboratory use — EMC requirements — Part 2-4: Particular requirements — Test configurations, operational conditions and performance criteria for insulation monitoring devices according to IEC 61557-8 and for equipment for insulation fault location according to IEC 61557-9. This part of IEC 61326 provides detailed EMC test setups and performance criteria that supplement the general requirements in IEC 61326-1 for equipment permanently or semi-permanently connected to distribution systems.

Abstract

IEC 61326-2-4:2020 defines electromagnetic compatibility (EMC) test configurations, operating conditions and pass/fail performance criteria specifically for insulation monitoring devices (IMDs) and insulation fault location equipment (IFL systems) referenced to IEC 61557-8 and IEC 61557-9. It supplements the generic immunity and emissions requirements in IEC 61326-1 with tailored guidance to ensure reliable operation of insulation-monitoring and fault-location functions in the presence of typical electromagnetic disturbances found on distribution networks.

General information

• Status: Published / active.
• Publication date: 27 October 2020.
• Publisher: IEC (International Electrotechnical Commission).
• ICS / categories: 17.220.20; 25.040.40; 33.100.20 (measurement, industrial process measurement & control, immunity).
• Edition / version: Edition 3.0 (IEC 61326-2-4:2020).
• Number of pages: 30 (base publication). RLV (redline) version available with expanded page count.

Scope

Specifies more detailed EMC test configurations, operational conditions and performance criteria than IEC 61326-1 for: (a) insulation monitoring devices as defined in IEC 61557-8 and (b) equipment for insulation fault location as defined in IEC 61557-9. It applies to devices and systems permanently or semi-permanently connected to distribution systems and gives tailored immunity and emission requirements and performance criteria appropriate to the functions of IMDs and IFL equipment.

Key topics and requirements

• Defined test configurations and wiring setups that reflect real installation conditions for IMDs and IFL equipment.
• Operational condition specifications to ensure tests reflect normal and fault operating modes relevant to insulation monitoring and fault location.
• Performance criteria (A/B/C style) that determine acceptable levels of degradation, false alarms or failure during immunity tests.
• References to IEC 61326-1 baseline EMC requirements and to IEC 61557-8 / IEC 61557-9 functional standards for insulation monitoring and fault location.
• Application of IEC 61000-series immunity and emission tests, with test levels and port definitions adapted for IMD/IFL equipment.

Typical use and users

Used by manufacturers of insulation monitoring devices and insulation fault location systems to demonstrate EMC compliance; by EMC test laboratories when designing and executing test programs for IMD/IFL products; by certification bodies, conformity assessment teams and standards committees; and by design engineers and specifiers in utilities, industrial plants and building services responsible for selecting or integrating insulation monitoring and fault-location equipment.

Related standards

Key related documents include IEC 61326-1 (general EMC requirements for measurement, control and laboratory equipment), IEC 61557-8 (insulation monitoring devices), IEC 61557-9 (equipment for insulation fault location), and the IEC 61000 series of immunity and emission test methods. This part is published as an IEC international standard and is also adopted regionally (for example as EN IEC 61326-2-4 in Europe).

Keywords

EMC, insulation monitoring, insulation fault location, IMD, IFL, IEC 61326-2-4, IEC 61557-8, IEC 61557-9, immunity tests, emissions, test configurations, performance criteria.

FAQ

Q: What is this standard?

A: IEC 61326-2-4:2020 is a part of the IEC 61326 series that provides particular EMC requirements — test setups, operating conditions and performance criteria — for insulation monitoring devices and insulation fault location equipment.

Q: What does it cover?

A: It covers EMC test configurations, the operational modes to be considered during testing, and the performance criteria used to judge acceptable behaviour of IMDs and IFL systems when exposed to electromagnetic disturbances. It supplements IEC 61326-1 with requirements specific to insulation-monitoring and fault-location functionality.

Q: Who typically uses it?

A: Manufacturers, EMC test laboratories, certification and conformity assessment bodies, product compliance engineers, and utilities or plant engineers specifying or installing insulation monitoring and fault-location equipment.

Q: Is it current or superseded?

A: IEC 61326-2-4:2020 (edition 3.0, published 27 October 2020) is the current edition; it revises earlier editions (for example the 2012 edition). The IEC webstore lists a stability date (indicating anticipated technical stability) through 2026; redline and consolidated versions are available for comparison with previous editions.

Q: Is it part of a series?

A: Yes — it is Part 2-4 of the IEC 61326 series (EMC requirements for measurement, control and laboratory equipment). Other parts in the series address different product families and particular requirements (for example Parts 2-1, 2-3, 2-5, 2-6, etc.). It also links functionally to the IEC 61557 series for insulation-related performance and the IEC 61000 series for EMC test methods.

Q: What are the key keywords?

A: EMC, insulation monitoring device, insulation fault location, IMD, IFL, IEC 61557-8, IEC 61557-9, immunity testing, emissions, performance criteria, test configuration.