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  • BSI
    BS EN IEC 60947-4-1:2019 Low-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters
    Edition: 2021
    $538.63
    / user per year

Description of BS EN IEC 60947-4-1:2019 2021

This part of IEC 60947 is applicable to the following equipment:

  • electromechanical contactors and starters including motor protective switching device (MPSD);

  • actuators of contactor relays;

  • contacts dedicated exclusively to the coil circuit of this contactor or this contactor relay;

  • dedicated accessories (e.g. dedicated wiring, dedicated latch accessory);

intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.

This document covers also the assessment procedure for electromechanical overload protection used in safety applications such as protecting a motor located in explosive atmosphere from the outside atmosphere: See Annex L.

This document does not apply to:

  • starters for DC motors 1;

    NOTE 1 The requirements for DC motor starters are under consideration for the next maintenance cycle.

  • auxiliary contacts of contactors and contacts of contactor relays. These are covered by IEC 60947-5-1;

  • starter used downstream to frequency drive1;

    NOTE 2 Additional requirements for starter used downstream to frequency drive are under consideration for the next maintenance cycle.

  • short-circuit protective device integrated within starters other than MPSDs. This is covered by IEC 60947-2 and IEC 60947-3;

  • the use of the product with additional measure within explosive atmospheres. These are given in IEC 60079 series;

  • embedded software design rules1;

  • cyber security aspects. These are covered by IEC 62443 series.

The objective of this document is to state:

  1. the characteristics of the equipment;

  2. the conditions applicable to the equipment with reference to:

    1. its operation and behaviour,

    2. its dielectric properties,

    3. its degree of protection,

    4. its construction including safety measures against electric shock, fire hazard and mechanical hazard;

  3. the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests;

  4. the information to be given with the equipment or in the manufacturer's literature.



Standard NumberBS EN IEC 60947-4-1:2019
TitleLow-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters
StatusDefinitive
Publication Date2021-06-02
Identical National Standard OfEN IEC 60947-4-1:2019/AC:2021-04, IEC 60947-4-1:2018/COR2:2021, IEC 60947-4-1:2018/COR2:2021
CorrectsBS EN IEC 60947-4-1:2019
DescriptorsOverload protection, Electrically-operated devices, Electric starters, Low-voltage equipment, Electrical equipment, Electromechanical devices, Protected electrical equipment, Electric control equipment, Electric motors, Low voltage, Switchgear, Contactors
ICS29.130.20 Low voltage switchgear and controlgear, 29.120.99 Other electrical accessories
CommitteePEL/121/1
ISBN978 0 539 17802 9
PublisherBSI
Pages194

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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