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eLibrary >
BS EN IEC 60947-4-1:2019 Low-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters >
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BS EN IEC 60947-4-1:2019 Low-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters, 2021
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and abbreviated terms [Go to Page]
- 3.1 General
- 3.2 Alphabetical index of terms
- 3.3 Terms and definitions concerning contactors
- 3.4 Terms and definitions concerning starters
- 3.5 Terms and definitions concerning characteristic quantities
- 3.6 Terms and definitions concerning safety aspects
- 3.7 Symbols and abbreviated terms
- 4 Classification
- 5 Characteristics of contactors and starters [Go to Page]
- 5.1 Summary of characteristics
- 5.2 Type of equipment [Go to Page]
- 5.2.1 Kind of equipment
- 5.2.2 Number of poles
- 5.2.3 Kind of current (AC or DC)
- 5.2.4 Interrupting medium (air, oil, gas, vacuum, etc.)
- 5.2.5 Operating conditions of the equipment
- 5.3 Rated and limiting values for main circuits [Go to Page]
- 5.3.1 Rated voltages
- 5.3.2 Currents or powers
- 5.3.3 Rated frequency
- 5.3.4 Rated duties
- 5.3.5 Normal load and overload characteristics
- 5.3.6 Short-circuit characteristics
- 5.3.7 Pole impedance of a contactor (Z)
- 5.4 Utilization category [Go to Page]
- 5.4.1 General
- 5.4.2 Assignment of utilization categories based on the results of tests
- 5.5 Control circuits
- Tables [Go to Page]
- Table 1 – Utilization categories
- 5.6 Auxiliary circuits
- 5.7 Characteristics of relay and release of overload relays and motor protective switching device (MPSD) [Go to Page]
- 5.7.1 Summary of characteristics
- 5.7.2 Types of relay or release
- 5.7.3 Characteristic values
- 5.7.4 Designation and current settings of overload relays
- 5.7.5 Time-current characteristics of overload relays
- Table 2 – Trip classes of overload relays [Go to Page]
- 5.7.6 Influence of ambient air temperature
- 5.8 Co-ordination with short-circuit protective devices
- 5.9 Void
- 5.10 Types and characteristics of automatic change-over devices and automatic acceleration control devices [Go to Page]
- 5.10.1 Types
- 5.10.2 Characteristics
- 5.11 Types and characteristics of auto-transformers for two-stepauto-transformer starters
- 5.12 Types and characteristics of starting resistors for rheostatic rotor starters
- 6 Product information [Go to Page]
- 6.1 Nature of information [Go to Page]
- 6.1.1 Identification
- 6.1.2 Characteristics, basic rated values and utilization
- 6.2 Marking
- 6.3 Instructions for installation, operation, maintenance, decommissioning and dismantling
- 6.4 Environmental information
- 7 Normal service, mounting and transport conditions
- 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
- 8.1.6 Indication of the contact position
- 8.1.7 Additional requirements for equipment suitable for isolation
- 8.1.8 Terminals
- 8.1.9 Additional requirements for equipment provided with a neutral pole
- 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 Limited energy source
- Table 19 – Limits for limited energy sources without an over-current protective device
- Table 20 – Limits for limited energy sources with an over-current protective device [Go to Page]
- 8.1.15 Stored charge energy circuit
- 8.1.16 Fault and abnormal conditions
- Table 21 – Limits for limited energy source with current limiting impedance [Go to Page]
- 8.1.17 Short-circuit and overload protection of ports
- 8.2 Performance requirements [Go to Page]
- 8.2.1 Operating conditions
- Table 3 – Limits of operation of time-delay overload relays when energized on all poles
- Figures [Go to Page]
- Figure 1 – Multiple of current setting limits for ambient air temperature compensated time-delay overload relays
- Figure 2 – Thermal memory test
- Table 4 – Limits of operation of three-pole time-delay overload relays when energized on two poles only [Go to Page]
- 8.2.2 Temperature-rise
- Table 5 – Temperature-rise limits for insulated coils in air and in oil [Go to Page]
- 8.2.3 Dielectric properties
- Table 6 – Intermittent duty test cycle data [Go to Page]
- 8.2.4 Normal load and overload performance requirements
- Table 7 – Making and breaking capacities – Making and breaking conditions according to utilization category
- Table 8 – Relationship between the test current and off-time forthe verification of rated making and breaking capacities
- Table 9 – Operational current determination for utilization categories AC-6a and AC-6b when derived from AC-3 ratings
- Table 10 – Conventional operational performance – Making and breaking conditions according to utilization category [Go to Page]
- 8.2.5 Co-ordination with short-circuit protective devices
- Table 11 – Overload current withstand requirements
- Figure 3 – Examples of co-ordination characteristics of a starter
- Table 15 – Test conditions for Icd
- 8.3 Electromagnetic compatibility (EMC) [Go to Page]
- 8.3.1 General
- 8.3.2 Immunity
- 8.3.3 Emission
- 9 Tests [Go to Page]
- 9.1 Kinds of test [Go to Page]
- 9.1.1 General
- Table 12 – Specific acceptance criteria for immunity tests [Go to Page]
- 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 Electrical performance of screwless-type clamping units
- 9.2.3 Ageing test for screwless-type clamping units
- Figure 4 – Voltage drop measurement at contact point of the clamping terminal [Go to Page]
- 9.2.4 Limited energy source test
- 9.2.5 Breakdown of components
- 9.3 Compliance with performance requirements [Go to Page]
- 9.3.1 Test sequences
- 9.3.2 General test conditions
- 9.3.3 Performance under no load, normal load and overload conditions
- Figure 5 – Example of a pole impedance measurement for a 3 pole contactor [Go to Page]
- 9.3.4 Performance under short-circuit conditions
- Table 13 – Value of the prospective test current according to the rated operational current
- Table 14 – Value of the prospective test current according to the rated operational current (harmonized table) [Go to Page]
- 9.3.5 Overload current withstand capability of contactors
- 9.3.6 Routine tests and sampling tests
- 9.4 EMC tests [Go to Page]
- 9.4.1 General
- 9.4.2 Immunity
- Table 16 – EMC immunity tests [Go to Page]
- 9.4.3 Emission
- Table 17 – Terminal disturbance voltage limits for conducted radio-frequency emission (for mains ports)
- Table 18 – Radiated emission test limits
- Annexes [Go to Page]
- Annex A (normative) Marking and identification of terminals of contactors, starters and associated overload relays [Go to Page]
- A.1 General
- A.2 Marking and identification of terminals of main circuits
- A.3 Marking and identification of terminals of overload relays
- Figure A.1 – Main circuit
- Figure A.2 – Overload relays
- Annex B (normative) Special tests [Go to Page]
- B.1 General
- B.2 Mechanical durability [Go to Page]
- B.2.1 General
- B.2.2 Verification of mechanical durability
- B.3 Electrical durability [Go to Page]
- B.3.1 General
- B.3.2 Results to be obtained
- B.3.3 Statistical analysis of test results for contactors or starters
- Table B.1 – Verification of the number of on-load operating cycles – Conditions for making and breaking corresponding to the several utilization categories [Go to Page]
- B.4 Coordination at the crossover current between the starter and associated SCPD [Go to Page]
- B.4.1 General and definitions
- B.4.2 Condition for the test for the verification of co-ordination at the crossover current by a direct method
- B.4.3 Test currents and test circuits
- B.4.4 Test procedure and results to be obtained
- B.4.5 Verification of co-ordination at the crossover current by an indirect method
- Table B.2 – Test conditions
- Figure B.1 – Examples of time-current withstand characteristic
- Annex C (informative) Typical characteristics of starters
- Figure C.1 – Typical curves of currents and torques during a star-delta start (see 3.4.4.1)
- Figure C.2 – Typical curves of currents and torques during an auto-transformer start (see 3.4.4.2)
- Figure C.3 – Typical variants of protected starters, combination starters, protected switching devices and combination switching devices
- Figure C.4 – Example of three-phase diagram of a rheostatic rotor starter with three starting steps and one direction of rotation (in the case whenall the mechanical switching devices are contactors)
- Figure C.5 – Typical methods and diagrams of starting alternating-current induction motors by means of auto-transformers
- Figure C.6 – Examples of speed/time curves corresponding to cases a), b), c), d), e) and f) of 5.3.5.6.1
- Annex D (informative) Items subject to agreement between manufacturer and user
- Annex E (Void)
- Annex F (normative) Requirements for auxiliary contact linked with power contact (mirror contact) [Go to Page]
- F.1 Application and object [Go to Page]
- F.1.1 Application
- F.1.2 Object
- F.2 Terms and definitions
- F.3 Characteristics
- F.4 Product information
- F.5 Normal service, mounting and transport conditions
- F.6 Constructional and performance requirements
- F.7 Tests [Go to Page]
- F.7.1 General
- F.7.2 Tests on products in a new condition
- Figure F.1 – Mirror contact [Go to Page]
- [Go to Page]
- F.7.3 Test after conventional operational performance (defined under Table 10)
- Table F.1 – Test voltage according to altitude
- Annex G (informative) Rated operational currents and rated operational powers of switching devices for electrical motors [Go to Page]
- G.1 General
- G.2 Rated operational powers and rated operational currents
- Table G.1 – Rated operational powers and rated operational currents of motors
- Annex H (normative) Extended functions to electronic overload relays [Go to Page]
- H.1 General
- H.2 Terms and definitions
- H.3 Limits of operation of control functions [Go to Page]
- H.3.1 General
- H.3.2 Limits of electronic overload relay with main circuit under-voltage restarting function
- H.4 Test of the control functions
- Annex I (informative) AC-1 contactors for use with semiconductor controlled motor load
- Annex J (Void)
- Annex K (normative) Procedure to determine data for electromechanical contactors used in functional safety applications [Go to Page]
- K.1 General
- K.2 Test requirements
- K.3 Characterization of a failure mode
- K.4 Failure ratios of a contactor
- Table K.1 – Failure mode of contactors
- Table K.2 – Typical failure ratios for normally open contactors
- Annex L (normative) Assessment procedure for electromechanical overload protection used in safety applications and especially in explosive atmospheres [Go to Page]
- L.1 Application and object [Go to Page]
- L.1.1 Application
- L.1.2 Object
- L.2 Terms, definitions and symbols [Go to Page]
- L.2.1 Terms and definitions
- L.2.2 Symbols and abbreviations
- L.3 Procedure [Go to Page]
- L.3.1 General
- L.3.2 Safety design process
- L.4 Requirements [Go to Page]
- L.4.1 General
- L.4.2 Safety plan
- Figure L.1 – Safety design process [Go to Page]
- [Go to Page]
- L.4.3 Design
- L.4.4 Failure mode and effects analysis of the safety function
- L.4.5 Design plan
- L.4.6 Verification
- L.4.7 Function assessed
- L.5 Documentation [Go to Page]
- L.5.1 Technical safety documentation
- L.5.2 Safety instructions
- L.6 Example [Go to Page]
- L.6.1 architecture description
- Figure L.2 – Typical structure of a thermal overload relay [Go to Page]
- [Go to Page]
- L.6.2 FMEA
- Figure L.3 – typical structure of MPSD
- Table L.1 – Severity
- Table L.2 – Occurrence
- Table L.3 – Detection levels
- Table L.4 – Conclusion
- Table L.5 – Example of failure mode and effects analysis for thermal overload relay
- Annex M (normative) DC contactors for use in photovoltaic (PV) applications [Go to Page]
- M.1 Application
- M.2 Object
- M.3 Terms and definitions
- M.4 Classification
- M.5 Characteristics [Go to Page]
- M.5.1 General
- M.5.2 Rated impulse withstand voltage
- M.5.3 Utilization category
- Table M.1 – Rated impulse voltage levels for PV contactors
- Table M.2 – Utilization categories [Go to Page]
- M.6 Product information
- M.7 Normal service, mounting and transport conditions [Go to Page]
- M.7.1 General
- M.7.2 Ambient air temperature
- M.7.3 Altitude
- Table M.3 – Ambient air temperature conditions [Go to Page]
- M.8 Constructional and performance requirements [Go to Page]
- M.8.1 Constructional requirements
- M.8.2 Performance requirements
- Table M.4 – Verification of rated making and breaking capacities –Conditions for making and breaking corresponding to the DC-PV category [Go to Page]
- [Go to Page]
- M.8.3 Electromagnetic compatibility (EMC)
- M.9 Tests [Go to Page]
- M.9.1 General
- M.9.2 Type tests
- Table M.5 – Conventional operational performance – Making and breaking condition corresponding to the DC-PV category [Go to Page]
- [Go to Page]
- M.9.3 Making and breaking capacities and conventional operational performance
- M.9.4 Thermal cycling test
- M.9.5 Climatic test
- M.9.6 Dielectric test
- Table M.6 – Overall scheme of test sequences [Go to Page]
- [Go to Page]
- M.9.7 Critical load current test
- Figure M.1 – Critical current [Go to Page]
- [Go to Page]
- M.9.8 Mechanical properties
- Table M.7 – Number of operating cycles corresponding to the critical load current
- Table M.8 – Critical load current performance [Go to Page]
- [Go to Page]
- M.9.9 Degree of protection of enclosed contactors
- M.9.10 EMC
- M.9.11 Clearance and creepage distances
- Annex N (normative) Additional requirements and tests for equipment with protective separation [Go to Page]
- N.1 General
- N.2 Definitions
- N.3 Requirements [Go to Page]
- N.3.1 Test method for implementing protective impedance
- N.3.2 Touch current measurement
- Figure N.1 – Protection by means of protective impedance
- Figure N.2 – Measuring instrument
- Annex O (informative) Load monitoring indicators [Go to Page]
- O.1 General
- O.2 Indicators list
- Table O.1 – AC monitoring indicators list [Go to Page]
- O.3 Uncertainty
- Figure O.1 – Example of quantification of a process change [Go to Page]
- O.4 Tests [Go to Page]
- O.4.1 Routine tests
- O.4.2 Type tests
- Table O.2 – Different possibilities authorized for verification of indicators
- Table O.3 – Reference for verification conditions
- Table O.4 – Harmonic levels
- Annex P (normative) Short-circuit breaking tests of MPSD [Go to Page]
- P.1 General test conditions
- P.2 Rated service short-circuit breaking capacity [Go to Page]
- P.2.1 General
- P.2.2 Test of rated service short-circuit breaking capacity
- P.2.3 Verification of operational performance capability
- P.2.4 Verification of dielectric withstand
- P.2.5 Verification of temperature-rise
- P.2.6 Verification of overload releases
- P.3 Rated ultimate short-circuit breaking capacity [Go to Page]
- P.3.1 General
- P.3.2 Verification of overload releases
- P.3.3 Test of rated ultimate short-circuit breaking capacity
- P.3.4 Verification of dielectric withstand
- P.3.5 Verification of overload releases
- P.4 Test of MPSD for IT system [Go to Page]
- P.4.1 General
- P.4.2 Individual pole short-circuit
- P.4.3 Verification of dielectric withstand
- P.4.4 Verification of overload releases
- P.4.5 Marking
- Annex Q (normative) Co-ordination under short-circuit conditions between a MPSD and another short-circuit protective device associated in the same circuit [Go to Page]
- Q.1 Application
- Q.2 Object
- Q.3 General requirements for the co-ordination of a MPSD with another SCPD [Go to Page]
- Q.3.1 General considerations
- Q.3.2 Behaviour of C1 in association with another SCPD
- Q.4 Type and characteristics of the associated SCPD
- Q.5 Verification of selectivity [Go to Page]
- Q.5.1 General
- Q.5.2 Consideration of selectivity by desk study
- Q.5.3 Selectivity determined by test
- Figure Q.1 – Over-current co-ordination between a MPSD and a fuse or back-up protection by a fuse: operating characteristics
- Figure Q.2 – Total selectivity between MPSD and circuit-breakers – Case 1
- Figure Q.3 – Total selectivity between MPSD and circuit-breakers – Case 2
- Figure Q.4 – Back-up protection by a circuit-breaker – Operating characteristics – Case 1
- Figure Q.5 – Back-up protection by a circuit-breaker – Operating characteristics – Case 2
- Bibliography [Go to Page]
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