BS EN 50047:2019 pdf free.Low-voltage switchgear and controlgear -Control switches – Position switches 30 x 55- Dimensions and characteristics.
2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules EN 60947-1:2007/Al :2011, Low-voltage switchgear and controlgear – Part 1: General rules EN 60947-5-1:2017, Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices 3 Terms and definitions For the purposes of this document, the following terms and definitions given in EN 60947-5-1 and the following apply. ISO and IEC maintain term inological databases for use in standardization at the following addresses: • lEO Electropedia: available at http://www.electroredia.orq/ • ISO Online browsing plafform: available at http://www.iso.orq/ob 3.1 enclosure part providing a specified degree of protection of equipment against certain external influences and a specified degree of protection against approach to or contact with live parts and moving parts. 3.2 operating point position of the actuator in which the contact state changes when the position switch is activated. 3.3 reset point position of the actuator in which the contact state changes when the position switch is deactivated. 3.4 dfferential travel distance (in millimetres) between the operating and reset points. 3.5 lever part of actuator used for rotative movement. 3.6 roller lever lever, equipped with a free-running cylinder which is suitably shaped to make contact with the object to detect. 3.7 plunger piston which transmits the movement or the force to the contact of the position switch. 3.8 rounded plunger plunger with a round end. 3.9 roller plunger plunger, equipped with a free-running cylinder which is suitably shaped to make contact with the object to detect. 3.10 lever arm part of actuator used to actuate a plunger.3.11 roller lever arm lever arm, equipped with a free-running cylinder which is suitably shaped to make contact with the object to detect.BS EN 50047 pdf download.