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BS EN IEC 60947-1:2021:2023 Edition

BS EN IEC 60947-1:2021:2023 Edition

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Low-voltage switchgear and controlgear – General rules

Published By Publication Date Number of Pages
BSI 2023 298
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PDF Pages PDF Title
2 undefined
8 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
17 English
CONTENTS
28 FOREWORD
31 INTRODUCTION
32 1 Scope
2 Normative references
36 3 Terms, definitions, symbols and reference clauses
3.1 General
3.2 Alphabetical index of definitions
41 3.3 General terms and definitions
45 3.4 Switching devices
48 3.5 Parts of switching devices
54 3.6 Operation of switching devices
59 3.7 Characteristic quantities
69 3.8 Tests
3.9 Ports
3.10 Symbols and references clauses for characteristics described in this document
70 4 Classification
5 Characteristics
5.1 Summary of the characteristics
71 5.2 Type of equipment
5.3 Rated and limiting values for the main circuit
77 5.4 Utilization category
5.5 Control circuits
78 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
79 6.2 Marking
80 6.3 Instructions for installation, operation and maintenance, decommissioning and dismantling
81 6.4 Environmental information
7 Normal service, mounting and transport conditions
7.1 Normal service conditions
83 7.2 Conditions during transport and storage
7.3 Mounting
8 Constructional and performance requirements
8.1 Constructional requirements
92 8.2 Performance requirements
99 8.3 Electromagnetic compatibility (EMC)
100 9 Tests
9.1 Kinds of test
102 9.2 Compliance with constructional requirements
109 9.3 Performance
129 9.4 Tests for EMC
131 Tables
Table 1 – Nominal cross-sections of round copper conductors and approximate relationship between mm2 and AWG/kcmil sizes (see 8.1.8.2)
132 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)
133 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)
134 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)
135 Table 7 – Maximum conductor cross-sections and corresponding gauges (see 9.2.5.5.1)
136 Table 8 – Relationship between conductor cross-section and diameter
137 Table 9 – Test copper conductors for test currents up to 400 A inclusive (see 9.3.3.3.4)
138 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)
139 Table 12 – Impulse withstand test voltages
Table 13 – Minimum clearances in air
140 Table 14 – Test voltages across the open contacts of equipment suitable for isolation
Table 15 – Minimum creepage distances
141 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))
142 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
143 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)
144 Table 23 – Tests for EMC – Immunity (see 9.4.1)
145 Table 24 – Acceptance criteria when EM disturbances are present
Table 25 – Cross-sectional area of a copper protective conductor
146 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)
147 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)
148 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)
149 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)
150 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)
151 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))
152 Figure 8 – Diagram of a load circuit adjustment method
153 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)
154 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)
155 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)
156 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)
157 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)
158 Figure 14 – Verification of short-circuit making and breaking capacities on direct current (see 9.3.4.1.8)
159 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))
160 Figure 16 – Actuator test force (see 9.2.6.2.1 and Table 17)
161 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
164 Annex B (Vacant)
165 Annex C (normative) Degrees of protection of enclosed equipment
169 Table C.1 – IP Codes (1 of 3)
172 Annex D (informative) Examples of clamping units and relationship between clamping unit and connecting device
Figure D.1 – Clamping unit in a connecting device
173 Figure D.2 – Screw clamping units
174 Figure D.3 – Pillar clamping units
175 Figure D.4 – Stud clamping units
176 Figure D.5 – Saddle clamping units
177 Figure D.6 – Lug clamping units
178 Figure D.7 – Mantle clamping units
179 Figure D.8 – Screwless-type clamping units (sketches)
180 Annex E (informative) Description of a method for adjusting the load circuit
181 Figure E.1 – Determination of the actual value of the factor γ
182 Annex F (informative) Determination of short-circuit power-factor or time-constant
184 Annex G (informative) Measurement of creepage distances and clearances
Table G.1 – Minimum widths of grooves
185 Figure G.1 – Measurement of ribs
Figure G.2 – Creepage distance across the fixed and moving insulation of contact carriers
186 Figure G.3 – Example 1
Figure G.4 – Example 2
Figure G.5 – Example 3
187 Figure G.6 – Example 4
Figure G.7 – Example 5
Figure G.8 – Example 6
188 Figure G.9 – Example 7
Figure G.10 – Example 8
189 Figure G.11 – Example 9
Figure G.12 – Example 10
190 Figure G.13 – Example 11
191 Annex H (informative) Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of equipment
192 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
193 Annex J informative) Items subject to agreement between manufacturer and user
194 Annex K (normative) Procedure to determine reliability data for electromechanical devices used in functional safety applications
197 Table K.1 – Failure modes of devices
201 Table K.2 – Example of 15 sorted ascending times to failure of contactors
202 Table K.3 – Example median rank calculation
203 Figure K.1 – Plot of Weibull median rank regression
204 Annex L (normative) Terminal marking and distinctive number
215 Annex M (normative) Flammability test
Figure M.1 – Test fixture for hot wire ignition test
217 Figure M.2 – Circuit for arc ignition test
218 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
219 Annex N (normative) Requirements and tests for equipment with protective separation
223 Figure N.1 – Example of application with component connected between separated circuits
224 Annex O (informative) Environmentally conscious design
229 Figure O.1 – Conceptual relationship between provisions in product standards and the environmental impacts associated with the product during its life cycle
230 Figure O.2 – Overview of ECD process
233 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
234 Annex Q (normative) Special tests – Tests for environmental categories
236 Table Q.1 – Test sequences
240 Annex R (normative) Application of the metal foil for dielectric testing on accessible parts during operation or adjustment
242 Figure R.1 – Operating mechanism outside the enclosure
243 Figure R.2 – Application of the metallic foil to operating areas around switch actuator
244 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
245 Figure R.5 – Example II of application of the foil
Figure R.6 – Example III of application of the foil
246 Figure R.7 – Application of metal foil on holes and grooves
247 Figure R.8 – Operating space for actuation by rotary means
248 Annex S (normative) Digital inputs and outputs
249 Table S.1 – Rated values and operating ranges of incoming power supply
250 Figure S.1 – I/O parameters
251 Figure S.2 – U-I operation regions of current-sinking inputs
252 Table S.2 – Standard operating ranges for digital inputs (current sinking)
253 Table S.3 – Rated values and operating ranges for current sourcing digital AC outputs
254 Figure S.3 – Temporary overload waveform for digital AC outputs
256 Table S.4 – Rated values and operating ranges (direct current) for current-sourcing digital DC outputs
257 Figure S.4 – Temporary overload waveform for digital DC outputs
259 Table S.5 – Overload and short-circuit tests for digital outputs
263 Annex T (normative) Extended functions within electronic overload relays
264 Table T.1 – Tripping time of ground/earth fault electronic overload relays
267 Figure T.1 – Test circuit for the verification of the operating characteristic of a ground/earth fault current sensing electronic relay
268 Annex U (informative) Examples of control circuit configurations
Figure U.1 – Diagrammatic representation of an external control device
269 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
270 Figure U.5 – Equipment with bus interface
271 Annex V (informative) Power management with switchgear and controlgear for electrical energy efficiency
274 Annex W (normative) Procedure to establish material declaration
277 Table W.1 – Example of main and business information in tabular form
278 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
279 Figure W.2 – Example of product information, graphical representation of the XML code
Table W.3 – Example of declarable substances information in tabular form
280 Figure W.3 – Example of declarable substances information, graphical representation of the XML code
281 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
282 Annex X (normative) Co-ordination between circuit-breaker or CPS and another short-circuit protective device associated in the same circuit
288 Figure X.1 – Overcurrent co-ordination between a circuit-breaker or CPS and a fuse or back-up protection by a fuse: operating characteristics
289 Figure X.2 – Total selectivity between two circuit-breakers or a circuit-breaker and a CPS
290 Figure X.3 – Back-up protection by a circuit-breaker or CPS – Operating characteristics
291 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)
292 Figure X.5 – Example of test circuit for the verification of selectivity
293 Bibliography

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