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eLibrary >
BS EN IEC 60947-5-1:2025 - TC Tracked Changes. Low- voltage switchgear and controlgear - Control circuit devices and switching elements. Electromechanical control circuit devices >
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BS EN IEC 60947-5-1:2025 - TC Tracked Changes. Low- voltage switchgear and controlgear - Control circuit devices and switching elements. Electromechanical control circuit devices, 2025
- A-30404714.pdf [Go to Page]
- undefined
- European foreword
- Endorsement notice
- Annex ZA (normative) Normative references to international publications with their corresponding European publications
- Annex ZZ (informative) Relationship between this European standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered
- Table ZZ.1 — Correspondence between this European standard and Annex I of Directive 2014/35/EU [2014 OJ L96] [Go to Page]
- English [Go to Page]
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviated terms [Go to Page]
- 3.1 Terms and definitions [Go to Page]
- 3.1.1 General
- 3.1.2 Basic terms and definitions
- 3.1.3 Terms and definitions concerning automatic control switches
- 3.1.4 Terms and definitions concerning manually operated control switches
- 3.1.5 Terms and definitions concerning parts of control switches
- 3.1.6 Terms and definitions concerning operation of contactor relays
- 3.1.7 Terms and definitions concerning operation of pilot switches
- 3.1.8 Terms and definitions concerning operation of rotary switches
- 3.1.9 Terms and definitions concerning operation of mechanically operated control switches
- Figures [Go to Page]
- Figure 1 – Operation of push-buttons
- Figure 2 – Difference e between the over-travel of the actuatorand that of the contact element [Go to Page]
- 3.1.10 Terms and definitions concerning reed contact magnetic switches
- 3.1.11 Terms and definitions concerning Class II control circuit devices
- 3.1.12 Terms and definitions concerning control circuit devices with integrally connected cables
- 3.1.13 Terms and definitions concerning semiconductor switching elements
- 3.1.14 Terms and definitions concerning indicator lights, indicating towers and audible signalling devices
- 3.1.15 Terms and definitions concerning control switches with direct opening action
- 3.1.16 Terms and definitions concerning digital communication interface
- 3.1.17 Alphabetical index of definitions
- 3.2 Symbols and abbreviated terms
- 4 Classification [Go to Page]
- 4.1 Contact elements
- Figure 3 – Examples of contact elements (schematic sketches)
- 4.2 Control switches
- 4.3 Control circuit devices
- 4.4 Time delay switching elements
- 4.5 Control switch mounting
- 5 Characteristics [Go to Page]
- 5.1 Summary of characteristics [Go to Page]
- 5.1.1 General
- 5.1.2 Operation of a control switch
- 5.2 Type of control circuit device or switching element [Go to Page]
- 5.2.1 Kind of control circuit device
- 5.2.2 Kind of switching elements
- 5.2.3 Number of poles
- 5.2.4 Kind of current
- 5.2.5 Interrupting medium
- Tables [Go to Page]
- Table 1 – Utilization categories for switching elements [Go to Page]
- 5.2.6 Operating conditions
- 5.3 Rated and limiting values for switching elements [Go to Page]
- 5.3.1 General
- 5.3.2 Rated voltages (of a switching element)
- 5.3.3 Currents
- 5.3.4 Rated frequency
- 5.3.5 Vacant
- 5.3.6 Characteristics under normal and abnormal load conditions
- Table 2 – Verification of making and breaking capacities of switching elements under normal load conditions corresponding to the utilization categories [Go to Page]
- 5.3.7 Shortcircuit characteristics – Rated conditional short-circuit current
- 5.4 Utilization categories for switching elements
- 5.5 Control circuits
- Table 3 – Verification of making and breaking capacities of switching elements under abnormal conditions corresponding to the utilization categories
- 5.6 Vacant
- 5.7 Vacant
- 5.8 Vacant
- 5.9 Vacant
- 5.10 Electrically separated contact elements
- 5.11 Actuating quantities for pilot switches
- 5.12 Pilot switches having two or more contact elements
- 6 Product information [Go to Page]
- 6.1 Nature of information
- 6.2 Marking [Go to Page]
- 6.2.1 General
- 6.2.2 Terminal identification and marking
- 6.2.3 Functional markings
- 6.2.4 Emergency stop
- 6.2.5 Operating diagram
- 6.2.6 Time delay markings
- Figure 4 – Examples of the recommended method for drawingan operating diagram of a rotary switch
- 6.3 Instructions for installation, operation and maintenance, decommissioning and dismantling
- 6.4 Environmental information [Go to Page]
- 6.4.1 Environmentally conscious design process (ECD process)
- 6.4.2 Procedure to establish material declaration
- 6.5 Additional information
- 7 Normal service, mounting and transport conditions [Go to Page]
- 7.1 Normal service conditions [Go to Page]
- 7.1.1 Ambient air temperature
- 7.1.2 Altitude
- 7.1.3 Atmospheric conditions
- 7.1.4 Shock and vibration
- 7.2 Conditions during transport and storage
- 7.3 Mounting [Go to Page]
- 7.3.1 General
- 7.3.2 Mounting of single hole mounted devices
- Figure 5 – Mounting hole diameter and dimensions of the key recess (if any)
- Table 4 – Mounting hole diameter anddimensions of the key recess (if any)
- Table 5 – Preferred minimum distances between centres of mounting holes
- 8 Constructional and performance requirements [Go to Page]
- 8.1 Constructional requirements [Go to Page]
- 8.1.1 General
- 8.1.2 Materials
- 8.1.3 Current-carrying parts and their connections
- 8.1.4 Clearances and creepage distances
- 8.1.5 Actuator
- Table 6 – Test conditions for glow-wire test [Go to Page]
- 8.1.6 Indication of the contact position
- 8.1.7 Conditions for control switches suitable for isolation
- 8.1.8 Terminals
- 8.1.9 Vacant
- 8.1.10 Provisions for protective earthing
- 8.1.11 Enclosures for equipment
- 8.1.12 Degrees of protection of enclosed equipment
- 8.1.13 Conduit pull-out, torque and bending with metallic conduits
- 8.1.14 Requirements for control circuit devices with artificial optical radiation
- 8.1.15 Biological and chemical effects
- 8.1.16 Hygienic design
- 8.1.17 Security aspects
- 8.1.18 Limited energy source
- Table 7 – Limits for limited energy sources without an overcurrent protective device
- Table 8 – Limits for limited energy sources with an overcurrent protective device [Go to Page]
- 8.1.19 Fault and abnormal conditions
- Table 9 – Limits for limited energy source with limited current impedance [Go to Page]
- 8.1.20 Stored charge energy circuit
- 8.1.21 Embedded software
- 8.2 Performance requirements [Go to Page]
- 8.2.1 Operating conditions
- 8.2.2 Temperature-rise
- 8.2.3 Dielectric properties
- 8.2.4 Ability to make and break under normal and abnormal load conditions
- 8.2.5 Conditional short-circuit current
- 8.2.6 Vacant
- 8.2.7 Additional requirements for control switches suitable for isolation
- 8.3 Electromagnetic compatibility (EMC) [Go to Page]
- 8.3.1 General
- 8.3.2 Immunity
- 8.3.3 Emission
- 8.4 Special requirements [Go to Page]
- 8.4.1 Additional requirements for reed contact magnetic switches
- Table 10 – Acceptance criteria [Go to Page]
- 8.4.2 Class II control circuit devices
- 8.4.3 Additional requirements for control circuit devices with integrally connected cables
- 8.4.4 Additional requirements for semiconductor switching elements for control circuit devices
- 8.4.5 Special requirements for indicator lights, indicating towers and their optional audible functions
- 8.4.6 Special requirements for control switches with direct opening action
- 8.4.7 Special requirements for mechanically linked contact elements
- 8.4.8 Additional requirements for control circuit devices incorporating a built-in communication interface (SDCI)
- 9 Tests [Go to Page]
- 9.1 Kinds of test [Go to Page]
- 9.1.1 General
- 9.1.2 Type tests
- 9.1.3 Routine tests
- 9.1.4 Sampling tests
- 9.1.5 Special tests
- 9.2 Compliance with constructional requirements [Go to Page]
- 9.2.1 General
- 9.2.2 Test of materials to abnormal heat and fire
- 9.2.3 Equipment
- 9.2.4 Degrees of protection
- 9.2.5 Mechanical and electrical properties of terminals
- Figure 6 – Voltage drop measurement at contactpoint of the clamping unit or terminal
- Table 11 – Test values for electrical performanceand ageing test of screwless-type clamping units [Go to Page]
- 9.2.6 Verification of actuating force (or torque)
- 9.2.7 Verification of limitation of rotation (of a rotary switch)
- 9.2.8 Conduit pull-out test, torque test and bending test with metallic conduits
- 9.2.9 Test of earth continuity for protective earth
- 9.2.10 Limited energy source test
- 9.2.11 Breakdown of components
- 9.2.12 Artificial optical radiation test
- 9.2.13 Stored charge energy test
- 9.3 Performance [Go to Page]
- 9.3.1 Test sequences
- 9.3.2 General test conditions
- 9.3.3 Performance under no-load, normal load and abnormal load conditions
- Figure 7 – Test circuits for multi-pole control switches –Contacts of same polarity, not electrically separated
- Figure 8 – Test circuits for multi-pole control switches – Electrically separated
- Figure 9 – Load Ld details for test conditions requiring different valuesof make and break current and/or power factor (time constant)
- Figure 10 – Current/time limits for DC test loads [Go to Page]
- 9.3.4 Performance under conditional short-circuit current
- Figure 11 – Test circuit, conditional short-circuit current
- 9.4 Tests for EMC [Go to Page]
- 9.4.1 General
- 9.4.2 Immunity
- Table 12 – Immunity tests [Go to Page]
- 9.4.3 Emission
- 9.4.4 Test results and test report
- Annexes [Go to Page]
- Annex A (normative)Electrical ratings based on utilization categories(see 4.1)
- Table A.1 – Examples of contact rating designation based on utilization categories
- Table A.2 – Examples of semiconductors switching element ratings for 50 Hz and/or 60 Hz
- Table A.3 – Examples of semiconductors switching element ratings for direct current
- Annex B (informative)Example of inductive test loads for DC contacts [Go to Page]
- B.1 General
- B.2 Construction
- Figure B.1 – Construction of load for DC contacts
- Table B.1 – DC loads
- Annex C (normative)Special tests – Durability tests [Go to Page]
- C.1 General [Go to Page]
- C.1.1 Durability declaration
- C.1.2 Test procedures
- C.1.3 Failure criteria
- C.2 Mechanical durability [Go to Page]
- C.2.1 General
- C.2.2 Test procedures
- C.3 Electrical durability [Go to Page]
- C.3.1 General
- C.3.2 Test procedures
- Table C.1 – Making and breaking conditions for electrical durability
- Figure C.1 – Normal circuit(see C.3.2.2)
- Figure C.2 – Simplified circuit(see C.3.2.2)
- Annex D (normative)Additional requirements for reed contact magnetic switches
- Annex E (informative)Items subject to agreement between manufacturer and user
- Annex F (normative)Class II control circuit devices –Requirements and tests
- Figure F.1 – Device insulated by encapsulation
- Figure F.2 – Device insulated by double and reinforced insulation
- Table F.1 – Acceptance criteria for Annex F
- Figure F.3 – Test apparatus
- Annex G (normative)Additional requirements for control circuit deviceswith integrally connected cables
- Table G.1 – Material characteristics (informative)
- Table G.2 – Examples of standard cable types (informative)
- Table G.3 – Tensile forces
- Annex H (normative)Additional requirements for semiconductorswitching elements for control circuit devices
- Figure H.1 – Relationship between Ue and UB
- Figure H.2 – Example of test circuit for the verification of voltage drop, minimum operational current and OFF-state current
- Figure H.3 – Short-circuit testing
- Annex I (informative)
- Annex J (normative)Special requirements for indicator lights, indicating towersand audible signalling devices
- Figure J.1 – Mounting dimensions for indicating tower socket
- Figure J.2 – Mounting dimensions for temperature-rise tests
- Annex K (normative)Special requirements for control switcheswith direct opening action
- Figure K.1 – Verification of robustness of the actuating system
- Annex L (normative)Special requirements for mechanicallylinked contact elements
- Figure L.1 – Example of representation of NO and NC contactswhich are mechanically linked and NC non-linked contact
- Figure L.2 – Symbol for device containing mechanically linked contacts
- Annex M (normative)Terminal marking, distinctive number and distinctiveletter for control circuit devices [Go to Page]
- M.1 General
- M.2 Terminal marking rule [Go to Page]
- M.2.1 General
- M.2.2 Function digit
- M.2.3 Sequence digit
- M.2.4 Numbering method
- M.3 Distinctive number and distinctive letter [Go to Page]
- M.3.1 General
- M.3.2 Distinctive number
- M.3.3 Distinctive letter
- M.4 Terminal numbering sequence
- M.5 Contactor relays designated by the distinctive letter E
- Table M.1 – Diagrams of control switches
- Table M.2 – Diagrams of contactor relays designated by the distinctive letter E [Go to Page]
- M.6 Contactor relays designated by distinctive letters X, Y or Z [Go to Page]
- M.6.1 Contactor relays designated by the distinctive letter Z
- M.6.2 Contactor relays designated by the distinctive letter X
- M.6.3 Contactor relays designated by the distinctive letter Y
- Table M.3 – Diagrams of contactor relays designated by the distinctive letter Y
- Annex N (normative)Procedure to determine reliability data for electromechanical devicesin control circuits used in functional safety applications [Go to Page]
- N.1 General [Go to Page]
- N.1.1 Overview
- N.1.2 Object
- N.1.3 General requirements
- N.2 Terms, definitions and symbols
- N.3 Method based on durability test results [Go to Page]
- N.3.1 General method
- N.3.2 Test requirements
- N.3.3 Number of samples
- N.3.4 Characterization of a failure mode
- N.3.5 Weibull modelling
- N.3.6 Useful life and upper limit of failure rate
- N.3.7 Reliability data
- N.4 Data information
- N.5 Example
- Annex O (normative)Additional requirements for control circuit devices incorporatinga built-in communication interface complying with IEC 61131-9
- Bibliography [Go to Page]
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