SIST EN 50047:2019
(Main)Low-voltage switchgear and controlgear - Control switches - Position switches 30×55 - Dimensions and characteristics
Low-voltage switchgear and controlgear - Control switches - Position switches 30×55 - Dimensions and characteristics
This document applies to certain position switches with automatic return actuator, the standardized dimensions of which and the characteristics necessary for their application are given below.
A larger size (42,5x80) is standardized in EN 50041.
This document includes four types of position switches with the following actuator types:
– roller lever actuator (form A);
– rounded plunger actuator (form B);
– roller plunger actuator (form C);
– roller lever arm (form E).
This document is covering devices fitted with either independent (snap) action contact elements, designated (1), or dependent (slow make and break), designated (2) in Clause 5.
Niederspannungs-Schaltegeräte - Hilfsstromschalter - Positionsschalter 30x55 - Masse und Kennwerte
Appareillage à basse tension - Auxiliaires de commande - Interrupteurs de position 30x55 - Dimensions et caractéristiques
Nizkonapetostne stikalne in krmilne naprave - Kontrolna stikala - Položaj stikala 30×55 - Mere in značilnosti
Ta publikacija se uporablja za nekatere položaje stikala s samodejnim povratnim aktuatorjem za industrijsko uporabo, podaja pa tudi njegove standardizirane mere in značilnosti, potrebne za njegovo uporabo.
General Information
Relations
Overview
SIST EN 50047:2019 is a European standard developed by CLC for low-voltage switchgear and controlgear, focusing specifically on control switches known as position switches with dimensions 30 × 55 mm. This standard defines the dimensions, characteristics, and design requirements for position switches equipped with automatic return actuators. It supersedes the 1981 version and aligns with current electrotechnical norms to ensure compatibility, safety, and interoperability in industrial control systems.
Position switches standardized by SIST EN 50047:2019 play a crucial role in detecting the position or movement of machine parts, actuators, or other mechanical components in electrical control circuits. The standard provides detailed specifications to facilitate uniformity and adaptability in controlgear applications.
Key Topics
Scope and Application
SIST EN 50047:2019 applies to position switches with automatic return actuators of size 30 × 55 mm. It excludes larger switches covered under EN 50041. The document focuses on four main actuator types:- Roller lever actuator (Form A)
- Rounded plunger actuator (Form B)
- Roller plunger actuator (Form C)
- Roller lever arm (Form E)
Dimensions and Construction
The standard specifies precise dimensions, including enclosure sizes, actuator details, and fixing point spacing. Dimensions ensure switches fit standard control panels and mounting systems. Manufacturers must comply with these to maintain interchangeability and performance consistency.Actuator Characteristics
Actuators must provide defined operating and reset points, ensuring accurate and reliable state changes. Details such as differential travel, lever and plunger types, and movement paths are standardized to match application-specific requirements.Contact Mechanisms
Devices covered can have independent (snap action) or dependent (slow make and break) contact elements, identified as (1) or (2) respectively. Position switches must include at least one normally open (make) and one normally closed (break) contact to support diverse control functions.Enclosure and Protection
The enclosures must provide adequate protection (minimum IP65) against dust and water ingress and include provisions like threaded cable entry holes. Metal enclosure models require dedicated protective conductor terminals.Marking and Designation
Terminals must be marked according to EN 60947-5-1, and product designation follows a clear format combining the standard number, actuator form, and contact mechanism type (e.g., EN 50047-A1).
Applications
SIST EN 50047:2019 position switches are widely used in:
Industrial Automation
Detecting mechanical motion or positions in automated machinery and production lines.Safety Systems
Monitoring guard doors, machine covers, and critical position states essential for safe operation.Control Panels
Integrating into low-voltage controlgear assemblies to provide precise position feedback.Electromechanical Devices
Operating in environments requiring robust and standardized switching for reliable process control.
Their standardized dimensions and specifications allow seamless integration with low-voltage equipment, enhancing compatibility across manufacturers and industries.
Related Standards
For comprehensive system compliance and design alignment, SIST EN 50047:2019 references and complements several key standards:
- EN 60947-1:2007 - Low-voltage switchgear and controlgear: General rules for electrical performance and safety.
- EN 60947-5-1:2017 - Electromechanical control circuit devices and switching elements - detailing control switches like those in EN 50047.
- EN 50041 - Defines larger position switches (42.5 × 80 mm) complementing the 30 × 55 size family.
- ISO 261 - Specifies metric screw thread standards for threaded components in enclosures.
These related standards ensure that position switches conform to harmonized electrical, mechanical, and safety requirements, easing global market acceptance.
By following SIST EN 50047:2019, manufacturers and end-users can guarantee that position switches meet consistent quality and functional criteria, ensuring reliable performance in low-voltage switchgear and controlgear applications. This standard is vital for engineers, system designers, and facility managers seeking standardized control components for automation and safety systems.
Frequently Asked Questions
SIST EN 50047:2019 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Low-voltage switchgear and controlgear - Control switches - Position switches 30×55 - Dimensions and characteristics". This standard covers: This document applies to certain position switches with automatic return actuator, the standardized dimensions of which and the characteristics necessary for their application are given below. A larger size (42,5x80) is standardized in EN 50041. This document includes four types of position switches with the following actuator types: – roller lever actuator (form A); – rounded plunger actuator (form B); – roller plunger actuator (form C); – roller lever arm (form E). This document is covering devices fitted with either independent (snap) action contact elements, designated (1), or dependent (slow make and break), designated (2) in Clause 5.
This document applies to certain position switches with automatic return actuator, the standardized dimensions of which and the characteristics necessary for their application are given below. A larger size (42,5x80) is standardized in EN 50041. This document includes four types of position switches with the following actuator types: – roller lever actuator (form A); – rounded plunger actuator (form B); – roller plunger actuator (form C); – roller lever arm (form E). This document is covering devices fitted with either independent (snap) action contact elements, designated (1), or dependent (slow make and break), designated (2) in Clause 5.
SIST EN 50047:2019 is classified under the following ICS (International Classification for Standards) categories: 29.130.20 - Low voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 50047:2019 has the following relationships with other standards: It is inter standard links to SIST EN 50047:1998, SIST EN 50047:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 50047:2019 is associated with the following European legislation: EU Directives/Regulations: 2014/35/EU; Standardization Mandates: M/511. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 50047:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 50047:1998
Nizkonapetostne stikalne in krmilne naprave - Kontrolna stikala - Položaj stikala
30×55 - Mere in značilnosti
Low-voltage switchgear and controlgear - Control switches - Position switches 30×55 -
Dimensions and characteristics
Niederspannungs-Schaltegeräte - Hilfsstromschalter - Positionsschalter 30x55 - Masse
und Kennwerte
Appareillage à basse tension - Auxiliaires de commande - Interrupteurs de position
30x55 - Dimensions et caractéristiques
Ta slovenski standard je istoveten z: EN 50047:2019
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50047
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 29.130.20 Supersedes EN 50047:1981
English Version
Low-voltage switchgear and controlgear - Control switches -
Position switches 30 × 55 - Dimensions and characteristics
Appareillage à basse tension - Auxiliaires de commande - Niederspannungs-Schaltgeräte - Hilfsstromschalter -
Interrupteurs de position 30x55 - Dimensions et Positionsschalter 30x55 - Maße und Kennwerte
caractéristiques
This European Standard was approved by CENELEC on 2019-05-06. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50047:2019 E
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Dimensions . 5
4.1 General . 5
4.2 Enclosure . 5
4.3 Actuator . 6
4.3.1 General . 6
4.3.2 Roller lever actuator (form A) . 7
4.3.3 Rounded plunger actuator (form B) . 8
4.3.4 Roller plunger actuator (form C) . 8
4.3.5 Roller lever arm (form E) . 9
5 Designation . 9
6 Contact unit . 10
7 Terminal marking . 10
8 Terminal for protective conductor . 10
9 Degree of protection . 10
Bibliography . 11
European foreword
This document (EN 50047:2019) has been prepared by CLC/TC 121A “Low-voltage switchgear and
controlgear”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2020-05-06
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2020-11-06
conflicting with this document have to be
withdrawn
This document supersedes EN 50047:1981.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
1 Scope
This document applies to certain position switches with automatic return actuator, the standardized
dimensions of which and the characteristics necessary for their application are given below.
A larger size (42,5x80) is standardized in EN 50041.
This document includes four types of position switches with the following actuator types:
– roller lever actuator (form A);
– rounded plunger actuator (form B);
– roller plunger actuator (form C);
– roller lever arm (form E).
This document is covering devices fitted with either independent (snap) action
...
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