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BS EN IEC 60947-1:2021

BS EN IEC 60947-1:2021

$215.11

Low-voltage switchgear and controlgear – General rules

Published By Publication Date Number of Pages
BSI 2021 298
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PDF Pages PDF Title
2 undefined
6 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
15 English
CONTENTS
26 FOREWORD
29 INTRODUCTION
30 1 Scope
2 Normative references
34 3 Terms, definitions, symbols and reference clauses
3.1 General
3.2 Alphabetical index of definitions
39 3.3 General terms and definitions
43 3.4 Switching devices
46 3.5 Parts of switching devices
52 3.6 Operation of switching devices
57 3.7 Characteristic quantities
67 3.8 Tests
3.9 Ports
3.10 Symbols and references clauses for characteristics described in this document
68 4 Classification
5 Characteristics
5.1 Summary of the characteristics
69 5.2 Type of equipment
5.3 Rated and limiting values for the main circuit
75 5.4 Utilization category
5.5 Control circuits
76 5.6 Auxiliary circuits
5.7 Relays and releases
5.8 Co-ordination with short-circuit protective devices (SCPD)
6 Product information
6.1 Nature of information
77 6.2 Marking
78 6.3 Instructions for installation, operation and maintenance, decommissioning and dismantling
79 6.4 Environmental information
7 Normal service, mounting and transport conditions
7.1 Normal service conditions
81 7.2 Conditions during transport and storage
7.3 Mounting
8 Constructional and performance requirements
8.1 Constructional requirements
90 8.2 Performance requirements
97 8.3 Electromagnetic compatibility (EMC)
98 9 Tests
9.1 Kinds of test
100 9.2 Compliance with constructional requirements
107 9.3 Performance
127 9.4 Tests for EMC
129 Tables
Table 1 – Nominal cross-sections of round copper conductors and approximate relationship between mm2 and AWG/kcmil sizes (see 8.1.8.2)
130 Table 2 – Temperature-rise limits of terminals (see 8.2.2.2 and 9.3.3.3.4)
Table 3 – Temperature-rise limits of accessible parts (see 8.2.2.3 and 9.3.3.3.4)
131 Table 4 – Tightening torques for the verification of the mechanical strength of screw-type terminals (see 9.2.5.2 and 9.3.2.1)
132 Table 5 – Test values for flexion and pull-out tests for round copper conductors (see 9.2.5.4.1)
Table 6 – Test values for pull-out test for flat copper conductors (see 9.2.5.4.2)
133 Table 7 – Maximum conductor cross-sections and corresponding gauges (see 9.2.5.5.1)
134 Table 8 – Relationship between conductor cross-section and diameter
135 Table 9 – Test copper conductors for test currents up to 400 A inclusive (see 9.3.3.3.4)
136 Table 10 – Test copper conductors for test currents above 400 A and up to 800 A inclusive (see 9.3.3.3.4)
Table 11 – Test copper bars for test currents above 400 A and up to 3 150 A inclusive (see 9.3.3.3.4)
137 Table 12 – Impulse withstand test voltages
Table 13 – Minimum clearances in air
138 Table 14 – Test voltages across the open contacts of equipment suitable for isolation
Table 15 – Minimum creepage distances
139 Table 16 – Values of power-factors and time-constants corresponding to test currents, and ratio n between peak and RMS values of current (see 9.3.4.3, item a))
140 Table 17 – Actuator test force (see 9.2.6.2.1)
Table 18 – Tolerances on test quantities (see 9.3.4.3, item a))
Table 19 – Dielectric test voltage corresponding to the rated insulation voltage
141 Table 20 – Test values for conduit pull-out test (see 9.2.8.2)
Table 21 – Test values for conduit bending test (see 9.2.8.3)
Table 22 – Test values for conduit torque test (see 9.2.8.2 and 9.2.8.4)
142 Table 23 – Tests for EMC – Immunity (see 9.4.1)
143 Table 24 – Acceptance criteria when EM disturbances are present
Table 25 – Cross-sectional area of a copper protective conductor
144 Figures
Figure 1 – Test equipment for flexion test (see 9.2.5.3 and Table 5)
Figure 2 – Gauges of form A and form B (see 9.2.5.5.2 and Table 7)
145 Figure 3 – Diagram of the test circuit for the verification of making and breaking capacities of a single-pole equipment on single-phase AC or on direct current (see 9.3.3.5.2)
146 Figure 4 – Diagram of the test circuit for the verification of making and breaking capacities of a two-pole equipment on single-phase AC or on direct current (see 9.3.3.5.2)
147 Figure 5 – Diagram of the test circuit for the verification of making and breaking capacities of a three-pole equipment (see 9.3.3.5.2)
148 Figure 6 – Diagram of the test circuit for the verification of making and breaking capacities of a four-pole equipment (see 9.3.3.5.2)
149 Figure 7 – Schematic illustration of the recovery voltage across contacts of the first phase to clear under ideal conditions (see 9.3.3.5.2, item e))
150 Figure 8 – Diagram of a load circuit adjustment method
151 Figure 9 – Diagram of the test circuit for the verification of short-circuit making and breaking capacities of a single-pole equipment on single-phase AC or on direct current (see 9.3.4.1.2)
152 Figure 10 – Diagram of the test circuit for the verification of short-circuit making and breaking capacities of a two-pole equipment on single-phase AC or on direct current (see 9.3.4.1.2)
153 Figure 11 – Diagram of the test circuit for the verification of short-circuit making and breaking capacities of a three-pole equipment (see 9.3.4.1.2)
154 Figure 12 – Diagram of the test circuit for the verification of short-circuit making and breaking capacities of a four-pole equipment (see 9.3.4.1.2)
155 Figure 13 – Example of short-circuit making and breaking test record in the case of a single-pole equipment on single-phase AC (see 9.3.4.1.8)
156 Figure 14 – Verification of short-circuit making and breaking capacities on direct current (see 9.3.4.1.8)
157 Figure 15 – Determination of the prospective breaking current when the first calibration of the test circuit has been made at a current lower than the rated breaking capacity (see 9.3.4.1.8, item b))
158 Figure 16 – Actuator test force (see 9.2.6.2.1 and Table 17)
159 Annexes
Annex A (informative) Harmonisation of utilization categories for low-voltage switchgear and controlgear
Table A.1 – Utilization categories used in the IEC 60947 series
162 Annex B (Vacant)
163 Annex C (normative) Degrees of protection of enclosed equipment
167 Table C.1 – IP Codes (1 of 3)
170 Annex D (informative) Examples of clamping units and relationship between clamping unit and connecting device
Figure D.1 – Clamping unit in a connecting device
171 Figure D.2 – Screw clamping units
172 Figure D.3 – Pillar clamping units
173 Figure D.4 – Stud clamping units
174 Figure D.5 – Saddle clamping units
175 Figure D.6 – Lug clamping units
176 Figure D.7 – Mantle clamping units
177 Figure D.8 – Screwless-type clamping units (sketches)
178 Annex E (informative) Description of a method for adjusting the load circuit
179 Figure E.1 – Determination of the actual value of the factor γ
180 Annex F (informative) Determination of short-circuit power-factor or time-constant
182 Annex G (informative) Measurement of creepage distances and clearances
Table G.1 – Minimum widths of grooves
183 Figure G.1 – Measurement of ribs
Figure G.2 – Creepage distance across the fixed and moving insulation of contact carriers
184 Figure G.3 – Example 1
Figure G.4 – Example 2
Figure G.5 – Example 3
185 Figure G.6 – Example 4
Figure G.7 – Example 5
Figure G.8 – Example 6
186 Figure G.9 – Example 7
Figure G.10 – Example 8
187 Figure G.11 – Example 9
Figure G.12 – Example 10
188 Figure G.13 – Example 11
189 Annex H (informative) Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of equipment
190 Table H.1 – Correspondence between the nominal voltage of the supply system and the equipment rated impulse withstand voltage, in case of overvoltage protection by surge-arresters according to IEC 60099-1
191 Annex J informative) Items subject to agreement between manufacturer and user
192 Annex K (normative) Procedure to determine reliability data for electromechanical devices used in functional safety applications
195 Table K.1 – Failure modes of devices
199 Table K.2 – Example of 15 sorted ascending times to failure of contactors
200 Table K.3 – Example median rank calculation
201 Figure K.1 – Plot of Weibull median rank regression
202 Annex L (normative) Terminal marking and distinctive number
213 Annex M (normative) Flammability test
Figure M.1 – Test fixture for hot wire ignition test
215 Figure M.2 – Circuit for arc ignition test
216 Table M.1 – HWI and AI characteristics for materials necessary to retain current carrying parts in position
Table M.2 – HWI and AI characteristics for materials other than those covered by Table M.1
217 Annex N (normative) Requirements and tests for equipment with protective separation
221 Figure N.1 – Example of application with component connected between separated circuits
222 Annex O (informative) Environmentally conscious design
227 Figure O.1 – Conceptual relationship between provisions in product standards and the environmental impacts associated with the product during its life cycle
228 Figure O.2 – Overview of ECD process
231 Annex P (informative) Terminal lugs for low voltage switchgear and controlgear connected to copper conductors
Figure P.1 – Dimensions
Table P.1 – Examples of terminal lugs for low voltage switchgear and controlgear connected to copper conductors
232 Annex Q (normative) Special tests – Tests for environmental categories
234 Table Q.1 – Test sequences
238 Annex R (normative) Application of the metal foil for dielectric testing on accessible parts during operation or adjustment
240 Figure R.1 – Operating mechanism outside the enclosure
241 Figure R.2 – Application of the metallic foil to operating areas around switch actuator
242 Figure R.3 – Example of finger protected location for hazardous-live-parts in push-button vicinity
Figure R.4 – Example I of application of the foil
243 Figure R.5 – Example II of application of the foil
Figure R.6 – Example III of application of the foil
244 Figure R.7 – Application of metal foil on holes and grooves
245 Figure R.8 – Operating space for actuation by rotary means
246 Annex S (normative) Digital inputs and outputs
247 Table S.1 – Rated values and operating ranges of incoming power supply
248 Figure S.1 – I/O parameters
249 Figure S.2 – U-I operation regions of current-sinking inputs
250 Table S.2 – Standard operating ranges for digital inputs (current sinking)
251 Table S.3 – Rated values and operating ranges for current sourcing digital AC outputs
252 Figure S.3 – Temporary overload waveform for digital AC outputs
254 Table S.4 – Rated values and operating ranges (direct current) for current-sourcing digital DC outputs
255 Figure S.4 – Temporary overload waveform for digital DC outputs
257 Table S.5 – Overload and short-circuit tests for digital outputs
261 Annex T (normative) Extended functions within electronic overload relays
262 Table T.1 – Tripping time of ground/earth fault electronic overload relays
265 Figure T.1 – Test circuit for the verification of the operating characteristic of a ground/earth fault current sensing electronic relay
266 Annex U (informative) Examples of control circuit configurations
Figure U.1 – Diagrammatic representation of an external control device
267 Figure U.2 – Single supply and control input
Figure U.3 – Separate supply and control inputs
Figure U.4 – Equipment with several external control supplies
268 Figure U.5 – Equipment with bus interface
269 Annex V (informative) Power management with switchgear and controlgear for electrical energy efficiency
272 Annex W (normative) Procedure to establish material declaration
275 Table W.1 – Example of main and business information in tabular form
276 Figure W.1 – Example of Main and Business information, graphical representation of the XML code
Table W.2 – Example of product information in tabular form
277 Figure W.2 – Example of product information, graphical representation of the XML code
Table W.3 – Example of declarable substances information in tabular form
278 Figure W.3 – Example of declarable substances information, graphical representation of the XML code
279 Figure W.4 – Example of material classes information, graphical representation of the XML code
Table W.4 – Example of material classes information in tabular form
280 Annex X (normative) Co-ordination between circuit-breaker or CPS and another short-circuit protective device associated in the same circuit
286 Figure X.1 – Overcurrent co-ordination between a circuit-breaker or CPS and a fuse or back-up protection by a fuse: operating characteristics
287 Figure X.2 – Total selectivity between two circuit-breakers or a circuit-breaker and a CPS
288 Figure X.3 – Back-up protection by a circuit-breaker or CPS – Operating characteristics
289 Figure X.4 – Example of test circuit for conditional short-circuit breaking capacity tests showing cable connections for a 3-pole circuit-breaker or CPS (C1)
290 Figure X.5 – Example of test circuit for the verification of selectivity
291 Bibliography

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BS EN IEC 60947-1:2021
$215.11