IEC 61000-4-11-2020 pdf free download – Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current up to 16 A per phase.
This part of lEC 61000 defines the immunity test methods and range of preferred test levelsfor electrical and electronic equipment connected to low-voltage power supply networks forvoltage dips,short interruptions, and voltage variations.
This document applies to electrical and electronic equipment having a rated input current notexceeding 16 A per phase, for connection to 50 Hz or 60 Hz AC networks.
lt does not apply to electrical and electronic equipment for connection to 400 Hz AC networks.Tests for these networks will be covered by future lEC documents.
The object of this document is to establish a common reference for evaluating the immunity of
electrical and electronic equipment when subjected to voltage dips,short interruptions andvoltage variations.
NOTE 1 Voltage fluctuation immunity tests are covered by lEC 61000-4-14.
The test method documented in this document describes a consistent method to assess theimmunity of equipment or a system against a defined phenomenon.
NOTE 2 As described in IEC Guide 107, this is a basic EMC publication for use by product committees of theIEC. As also stated in Guide 107, the lEC product committees are responsible for delermining whether thisimmunity test standard should be applied or not，and，if applied，they are responsible for defining the appropriatetest levels. Technical committee T7 and its sub-commilttes are prepared to co-operate with product committees inthe evaluation of the value of particular immunitytests for their products.
Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references,only the editioncited applies.For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC TR61000-2-8, Electromagnetic compatibility (EMC) – Part 2-8: Environment – Voltagedips and short interruptionson publicelectric power supply systems with statisticalmeasurement results
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISo and lEc maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.orgl
ISo Online browsing platform: available at http://www.iso.org/obp
3.1
immunity (to a disturbance)
ability of a device, equipment or system to perform without degradation in the presence of anelectromagnetic disturbance
[SOURCE: IEC 60050-161:1990,161-01-20]
3.2
voltage dip
sudden reduction of the voltage at a particular point of an electricity supply system below aspecified dip threshold followed by its recovery after a brief interval
Note 1 to entry: Typically,a dip is associated with the occurrence and termination of a short circuit or otherextreme currentincrease on the system or installations connected to it.
Note 2 to entry. A voltage dip is a two-dimensionalelectromagnetic disturbance,the level of which is determinedby both voltage and time (duration).
3.3
short interruption
sudden reduction of the voltage on all phases at a particular point of an electric supply systembelow a specified interruption threshold followed by its restoration after a brief interval
Note 1 to entry. Short interruptions are typically associated with switchgear operations related to the occurrenceand termination of short circuits on the system or on installations connected to it.
3.4
residual voltage
<voltage dip> minimum value of RMSvoltage recorded during a voltage dip or shortinterruption
Note 1 to entry: The residual voltage can be expressed as a value in vois or as a percentage or per unit valuerelative to the reference voltage.
3.5
malfunction
breakdown of the ability of equipment to carry out intended functions or the execution ofunintended functions by the equipment
3.6
calibration
method to prove that the measurement equipment is in compliance with its specifications
Note 1 to entry: For the purposes of this document,calibration is applied to the test generator.IEC 61000-4-11 pdf download.