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BS EN IEC 60947-4-2:2023

BS EN IEC 60947-4-2:2023

$215.11

Low-voltage switchgear and controlgear – Contactors and motor-starters. Semiconductor motor controllers, starters and soft-starter

Published By Publication Date Number of Pages
BSI 2023 120
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IEC 60947-4-2:2020 applies to semiconductor motor controllers, starters and soft-starters which can include a series mechanical switching device, intended to be connected to circuits the rated voltage of which does not exceed 1 000 V AC. This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – scope exclusions; – editorial correction of notes and hanging paragraphs; – reference to IEC 62683-1; – safety aspects related to: – general aspects; – limited energy circuits; – electronic circuits; – mention of dedicated wiring accessories; – power consumption measurement; – alignment to IEC 60947-1:2020.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
8 Blank Page
9 English
CONTENTS
14 FOREWORD
16 INTRODUCTION
17 1 Scope
18 2 Normative references
19 3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.1.1 Terms and definitions concerning the types of semiconductor motor controllers and starters
20 Figures
Figure 1 – Semiconductor motor control devices
21 3.1.2 Terms and definitions concerning semiconductor motor controllers and starters
24 3.1.3 Terms and definitions concerning safety aspects
25 3.1.4 Alphabetical index of terms
27 3.2 Symbols and abbreviated terms
4 Classification
5 Characteristics of semiconductor motor controllers and starters
5.1 Summary of characteristics
28 5.2 Type of equipment
5.2.1 Kind of equipment
5.2.2 Number of poles
5.2.3 Kind of current
5.2.4 Interrupting medium (air, vacuum, etc.)
5.2.5 Operating conditions of the equipment
29 5.3 Rated and limiting values for main circuits
5.3.1 Rated voltages
31 Figure 2 – Connecting methods
32 5.3.3 Rated frequency
5.3.4 Duty cycle values and sequences
5.3.5 Normal load and overload characteristics
34 5.3.6 Rated conditional short-circuit current
5.3.7 Semiconductor motor controller power losses
35 5.4 Utilization category
5.4.1 General
5.4.2 Assignment of ratings based on the results of tests
Tables
Table 1 – Utilization categories
36 5.5 Control circuits
5.6 Auxiliary circuits
5.7 Characteristics of relays and releases (overload relays)
5.7.1 Summary of characteristics
Table 2 – Relative levels of severity
37 5.7.2 Types of relay or release
5.7.3 Characteristic values
38 5.7.4 Designation and current settings of overload relays
5.7.5 Time-current characteristics of overload relays
Table 3 – Trip classes of overload relays
39 5.7.6 Influence of ambient air temperature
5.8 Coordination with short-circuit protective devices (SCPD)
6 Product information
6.1 Nature of information
41 6.2 Marking
6.3 Instructions for installation, operation, maintenance, decommissioning and dismantling
6.4 Environmental information
42 7 Normal service, mounting and transport conditions
7.1 Normal service conditions
7.1.1 Ambient air temperature
7.1.2 Altitude
7.1.3 Atmospheric conditions
7.1.4 Shock and vibrations
7.2 Conditions during transport and storage
7.3 Mounting
7.4 Electrical system disturbances and influences
43 8 Constructional and performance requirements
8.1 Constructional requirements
8.1.1 General
8.1.2 Materials
44 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
45 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
46 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
47 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
48 8.1.17 Short-circuit and overload protection of ports
8.2 Performance requirements
8.2.1 Operating conditions
50 Table 4 – Limits of operation of time-delay overload relayswhen energized on all poles
51 Figure 3 – Thermal memory test
52 Table 5 – Limits of operation of three-pole time-delay overload relayswhen energized on two poles only
53 8.2.2 Temperature-rise
54 8.2.3 Dielectric properties
Table 6 – Temperature-rise limits for insulated coils in air and in oil
55 8.2.4 Normal load and overload performance requirements
56 Table 7 – Minimum overload current withstand time (Tx) in relationto overload current ratio (X) and correspondingto overload relay trip class (see Table 3)
57 Table 8 – Minimum requirements for thermal stability test conditions
Table 9 – Prospective locked rotor current by utilization categories
58 Table 10 – Minimum requirements for overload capability test conditions
59 Table 11 – Making and breaking capacity test; making and breaking conditionsaccording to utilization categories for the mechanical switching device
60 8.2.5 Coordination with short-circuit protective devices
Table 12 – Conventional operational performance making and breaking conditionsaccording to utilization categories for the mechanical switching device
61 8.3 EMC requirements
8.3.1 General
8.3.2 Immunity
62 Table 13 – Specific performance criteriawhen EM disturbances are present
63 8.3.3 Emission
9 Tests
9.1 Kinds of tests
9.1.1 General
9.1.2 Type tests
64 9.1.3 Routine tests
9.1.4 Sampling tests
9.1.5 Special tests
65 9.2 Compliance with constructional requirements
9.2.1 General
9.2.2 Electrical performance of screwless-type clamping units
66 9.2.3 Ageing test for screwless-type clamping units
9.2.4 Limited energy source test
9.2.5 Breakdown of components
67 9.2.6 Wire flexing test
9.3 Compliance with performance requirements
9.3.1 Test sequences
68 9.3.2 General test conditions
9.3.3 Performance under no load, normal load, and overload conditions
73 Table 14 – Thermal stability test specifications
Table 15 – Initial case temperature requirements
75 Table 16 – Minimum requirements and conditions for performance testingwith an induction motor load
78 Figure 4 – Multiple of current setting limits for ambient air temperaturecompensated time-delay overload relays
79 9.3.4 Performance under short-circuit conditions
82 9.4 EMC tests
9.4.1 General
83 9.4.2 EMC immunity tests
9.4.3 EMC emission tests
85 Table 17 – Terminal disturbance voltage limitsfor conducted radio-frequency emission (AC mains power port)
86 9.5 Routine and sampling tests
9.5.1 General
9.5.2 Operation and operating limits
9.5.3 Dielectric tests
Table 18 – Radiated emissions test limits
88 Annexes
Annex A (normative)Marking and identification of terminals
A.1 General
A.2 Marking and identification of terminals of semiconductor controllersand starters
A.2.1 Marking and identification of terminals of main circuits
A.2.2 Marking and identification of terminals of control circuits
A.3 Marking and identification of terminals of overload relays
Table A.1 – Main circuit terminal markings
89 Annex B (xxx)
90 Annex C (normative)Coordination at the crossover current betweenthe starter and associated SCPD
C.1 General and definitions
C.1.1 General
C.1.2 Terms and definitions
C.2 Condition for the test for the verification of coordination at the crossover current by a direct method
C.3 Test currents and test circuits
91 C.4 Test procedure and results to be obtained
C.4.1 Test procedure
C.4.2 Results to be obtained
C.5 Verification of coordination at the crossover current by an indirect method
C.5.1 General
C.5.2 Test for Icd
92 C.5.3 Time-current characteristic withstand capability of controllers/starters
Table C.1 – Test conditions
93 Figure C.1 – Examples of time-current withstand characteristic
94 Annex D (xxx)
95 Annex E (xxx)
96 Annex F (informative)Operating capability
97 Figure F.1 – Thermal stability test profile
98 Figure F.2 – Overload capability test profile
99 Figure F.3 – Blocking and commutating capability test profile
100 Annex G (informative)Rated operational currents and rated operational powersof switching devices for electrical motors
G.1 General
G.2 Rated operational powers and rated operational currents
101 Table G.1 – Rated operational powers and rated operational currents of motors
104 Annex H (xxx)
105 Annex I (normative)Modified test circuit for short-circuit testingof semiconductor motor controllers and starters
Figure I.1 – Modified circuit for short-circuit testing of semiconductor devices
106 Figure I.2 – Time line for the short-circuit test of 9.3.4.1.6
107 Annex J (xxx)
108 Annex K (xxx)
109 Annex L (normative)Examples of overvoltage category reduction
L.1 General
L.2 Insulation to the surroundings
L.2.1 Circuits connected directly to the supply mains
Figure L.1 – Basic insulation evaluation for circuits connected directlyto the origin of the installation mains supply
Table L.1 – Drawing keys
110 L.2.2 Insulation between circuits
Figure L.2 – Basic insulation evaluation for circuitsconnected directly to the mains supply
Figure L.3 – Basic insulation evaluation for equipment notpermanently connected to the mains supply
111 Figure L.4 – Basic insulation evaluation for insulation between circuitsconnected directly to the origin of the installation mains supplyand that are declared galvanically separated
Figure L.5 – Basic insulation evaluation for insulation between circuits connected directly to the mains supply and that are declared galvanically separated
112 Figure L.6 – Basic insulation evaluation for insulation between circuits not permanently connected directly to the mains supply and that are declared galvanically separated
Figure L.7 – Basic insulation evaluation for insulation between circuits connected directly to the origin of the installation mains supply and that are declared galvanically separated where internal SPDs are used
113 Figure L.8 – Basic insulation evaluation for insulation betweencircuits connected directly to the mains supply and that are declaredgalvanically separated where internal SPDs are used
Figure L.9 – Basic insulation evaluation for insulation between circuits connected directly to the mains supply and that are declared galvanically separated
114 Annex M (xxx)
115 Annex N (normative)Additional requirements and tests for equipmentwith protective separation
N.1 General
N.2 Definitions
N.3 Requirements
N.3.1 Test method for implementing protective impedance
116 N.3.2 Touch current measurement
Figure N.1 – Protection by means of protective impedance
117 Figure N.2 – Measuring instrument
118 Bibliography

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BS EN IEC 60947-4-2:2023
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