Cart (0)
- No items in cart.
Total
$0
There is a technical issue about last added item. You can click "Report to us" button to let us know and we resolve the issue and return back to you or you can continue without last item via click to continue button.
Not a subscriber? Register for a trial account.
Already a subscriber? 
MADCAD.com Free Trial
Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.
If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.
| Email * | |
| Password * | |
| Confirm * | |
| First Name * | |
| Last Name * | |
| Title | |
| Company Name * | |
| Company Size * | |
| Industry * | |
| Address * | |
| Address 2 | |
| City * | |
| State * |
Zip *
|
| Country * | |
| Phone * | |
| How did you hear about MADCAD.com? * |
|
Reset password
Enter your personal account email address to request
a password reset:
a password reset:
Reset password
Enter your account email address to request
a password reset:
a password reset:
Security check
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?
Report To Us
Contact us for a custom quote
⨯To continue with accurate pricing,
please select your company type below:
⨯We need your input!
Are you a code official in a jurisdiction with less than 300,000 population?
⨯ We need your input!
⨯We need your input!
Are you an existing Madcad user?
If so, please login to continue with the free items in your cart.
⨯We need your input!
This bundle includes subscribed items.
Download File
eLibrary >
BS EN IEC 60947-4-1:2025 - TC Tracked Changes. Low-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters >
Expand All
TOC Search:
BS EN IEC 60947-4-1:2025 - TC Tracked Changes. Low-voltage switchgear and controlgear - Contactors and motor-starters. Electromechanical contactors and motor-starters, 2025
- A-30451631.pdf [Go to Page]
- undefined
- European foreword
- Endorsement notice
- Annex ZA (normative) Normative references to international publications with their corresponding European publications [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 General
- 3.2 Alphabetical index of terms
- 3.3 Terms and definitions concerning contactors
- 3.4 Terms and definitions of the functions of starters
- 3.5 Terms and definitions concerning starters
- 3.6 Terms and definitions concerning characteristic quantities
- 3.7 Terms and definitions concerning safety aspects
- 3.8 Terms and definitions concerning electric motor characteristics
- 3.9 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
- 5.2.6 Methods of overload protection of motors
- 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) or starter
- 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 of 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
- Table 2 – Trip classes of overload relays [Go to Page]
- 5.7.5 Time-current characteristics of overload relays
- 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
- 6.5 Instruction for equipment capable to be reused, repaired and upgraded
- 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 withoutan overcurrent protective device
- Table 20 – Limits for limited energy sources withan overcurrent 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 sourcewith current limiting impedance [Go to Page]
- 8.1.17 Short-circuit and overload protection of ports
- 8.1.18 Use of voltage transient limiting device
- 8.2 Performance requirements [Go to Page]
- 8.2.1 Operating conditions
- Figures [Go to Page]
- Figure 1 – Multiple of current setting limits for ambient air temperaturecompensated time-delay overload relays
- Table 3 – Limits of operation of time-delay overloadrelays when energized on all poles
- Figure 2 – Thermal memory test
- Table 4 – Limits of operation of three-pole time-delay overloadrelays 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
- Figure 3 – Example of different parts [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 categoriesAC-6a and AC-6b when derived from AC-3 ratings
- Table 10 – Conventional operational performance –Making and breaking conditions according to utilization category
- Table 11 – Overload current withstand requirements [Go to Page]
- 8.2.5 Co-ordination with short-circuit protective devices
- 8.3 Electromagnetic compatibility (EMC) [Go to Page]
- 8.3.1 General
- Figure 4 – Examples of co-ordination characteristics of a starter [Go to Page]
- 8.3.2 Immunity
- 8.3.3 Emission
- Table 12 – Specific acceptance criteria for immunity tests
- 8.4 Embedded software
- 8.5 Security
- 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 Electrical performance of screwless-type clamping units
- 9.2.3 Ageing test for screwless-type clamping units
- 9.2.4 Limited energy source test
- Figure 5 – Voltage drop measurement at contact pointof the clamping terminal [Go to Page]
- 9.2.5 Breakdown of components
- 9.2.6 Wire flexing test
- 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 6 – Peak current envelope [Go to Page]
- 9.3.4 Performance under short-circuit conditions
- Table 13 – Value of the prospective test current accordingto the rated operational current
- Table 14 – Value of the conventional prospective test current accordingto the rated operational current (harmonized table) [Go to Page]
- 9.3.5 Overload current withstand capability of contactors and IMPSDs
- 9.3.6 Routine tests and sampling tests
- Table 15 – Test conditions for Icd
- 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 conductedradio-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, startersand 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 Co-ordination at the crossover current between the starter and associated SCPD [Go to Page]
- B.4.1 General
- 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)Electric motor evolutions and motor starting methods [Go to Page]
- C.1 General [Go to Page]
- C.1.1 Major changes on the market concerning electrical motors
- C.1.2 Electric motor characteristics
- C.1.3 Efficiency motor analysis
- Figure C.1 – Electric motor characteristics
- Figure C.2 – Rated current of different energy efficiency classes
- Figure C.3 – Ratio of the rated locked-rotor current to the nominal current [Go to Page]
- [Go to Page]
- C.1.4 Impacts on switchgear and controlgear
- C.2 Typical variants direct-on-line starters
- Figure C.4 – Ratio of the inrush current to the nominal current
- Figure C.5 – Connections to motor windings
- Figure C.6 – Current and torque during direct-on-line starting [Go to Page]
- C.3 Functional aspects of motor starters
- Figure C.7 – Typical variants of protected starters, combination starters,protected switching devices and combination switching devices
- Figure C.8 – Functional view of motor starters [Go to Page]
- C.4 Currents and torques during a star-delta start
- Figure C.9 – Motor overload protection embedded into a circuit-breaker
- Figure C.10 – Typical curves of currents and torques during a star-delta start
- Figure C.11 – Timing of star-delta-switching [Go to Page]
- C.5 Currents and torques during an auto-transformer start
- Figure C.12 – Typical method and diagram of starting alternating-currentinduction motors by means of star-delta starter
- Figure C.13 – Typical curves of currents and torques duringan auto-transformer starting of a motor [Go to Page]
- C.6 Currents waveform of the different modes of operation of a starter
- Figure C.14 – Typical schematic diagrams for starting alternating-currentinduction motors by means of auto-transformers
- Figure C.15 – Examples of current and time curves of motor startingand stopping in one or two directions
- Annex D (informative)Items subject to agreement between manufacturer and user
- Annex E (Void)
- Annex F (normative)Requirements for auxiliary contact linked withpower contact (mirror contact) [Go to Page]
- F.1 Application and object [Go to Page]
- F.1.1 Application
- F.1.2 Object
- F.2 Characteristics
- F.3 Product information
- F.4 Normal service, mounting and transport conditions
- F.5 Constructional and performance requirements
- F.6 Tests [Go to Page]
- F.6.1 General
- F.6.2 Tests on products in a new condition
- Figure F.1 – Mirror contact [Go to Page]
- [Go to Page]
- F.6.3 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 powersof 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 Limits of operation of control functions [Go to Page]
- H.2.1 General
- H.2.2 Limits of electronic overload relay with main circuit undervoltage restarting function
- H.3 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 contactorsused 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 protectionused 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 Procedure [Go to Page]
- L.2.1 General
- L.2.2 Safety design process
- L.3 Requirements [Go to Page]
- L.3.1 General
- L.3.2 Safety plan
- Figure L.1 – Safety design process [Go to Page]
- [Go to Page]
- L.3.3 Design
- L.3.4 Failure mode and effects analysis of the safety function
- L.3.5 Design plan
- L.3.6 Verification
- L.3.7 Function assessed
- L.4 Documentation [Go to Page]
- L.4.1 Technical safety documentation
- L.4.2 Safety instructions
- L.5 Example [Go to Page]
- L.5.1 architecture description
- Figure L.2 – Typical structure of a thermal overload relay [Go to Page]
- [Go to Page]
- L.5.2 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 Classification
- M.4 Characteristics [Go to Page]
- M.4.1 General
- M.4.2 Rated impulse withstand voltage
- M.4.3 Utilization category
- M.5 Product information
- Table M.1 – Rated impulse voltage levels for PV contactors
- Table M.2 – Utilization categories [Go to Page]
- M.6 Normal service, mounting and transport conditions [Go to Page]
- M.6.1 General
- M.6.2 Ambient air temperature
- M.6.3 Altitude
- M.7 Constructional and performance requirements [Go to Page]
- M.7.1 Constructional requirements
- M.7.2 Performance requirements
- Table M.3 – Ambient air temperature conditions [Go to Page]
- [Go to Page]
- M.7.3 Electromagnetic compatibility (EMC)
- Table M.4 – Verification of rated making and breaking capacities –Conditions for making and breaking corresponding to the DC-PV category
- Table M.5 – Conventional operational performance – Making and breaking condition corresponding to the DC-PV category [Go to Page]
- M.8 Tests [Go to Page]
- M.8.1 General
- M.8.2 Type tests
- M.8.3 Making and breaking capacities and conventional operational performance
- M.8.4 Thermal cycling test
- Table M.6 – Overall scheme of test sequences [Go to Page]
- [Go to Page]
- M.8.5 Climatic test
- M.8.6 Dielectric test
- M.8.7 Critical load current test
- M.8.8 Mechanical and electrical properties of terminals
- M.8.9 Degree of protection of enclosed contactors
- M.8.10 EMC
- M.8.11 Clearance and creepage distances
- Table M.7 – Number of operating cycles corresponding to the critical load current
- Table M.8 – Critical load current performance
- Annex N (normative)Additional requirements and tests for equipmentwith protective separation [Go to Page]
- N.1 General
- N.2 Terms and 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 (normative)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 authorizedfor 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
- Bibliography [Go to Page]
Copyright 2025 Compu-tecture, Inc.
All Rights Reserved.
About Us /
Careers /
support@madcad.com /
1.800.798.9296