BS EN IEC 60947-4-1:2019

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: the characteristics of the equipment; the conditions applicable to the equipment with reference to: its operation and behaviour, its dielectric properties, its degree of protection, its construction including safety measures against electric shock, fire hazard and mechanical hazard; the tests intended for confirming that these conditions have been met, and the methods to be adopted for these tests; the information to be given with the equipment or in the manufacturer\'s literature.