CEI EN IEC 60947-4-1
Low-voltage switchgear and controlgear Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
|Publication Date:||1 August 2019|
|ICS Code (Other electrical accessories):||29.120.99|
|ICS Code (Low voltage switchgear and controlgear):||29.130.20|
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:
a) the characteristics of the equipment;
b) 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;
c) the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests;
d) the information to be given with the equipment or in the manufacturer's literature.
1 For this subject the manufacturer is responsible for taking additional safety measures.