🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN 61439-1:2011

BS EN 61439-1:2011

$215.11

Low-voltage switchgear and controlgear assemblies – General rules

Published By Publication Date Number of Pages
BSI 2011 148
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

IEC 61439-1:2011 lays down the definitions and states the service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and controlgear assemblies. This standard cannot be used alone to specify an ASSEMBLY or used for a purpose of determining conformity. ASSEMBLIES shall comply with the relevant part of the IEC 61439 series; Parts 2 onwards. This standard applies to low-voltage switchgear and controlgear assemblies (ASSEMBLIES) only when required by the relevant ASSEMBLY standard as follows: – ASSEMBLIES for which the rated voltage does not exceed 1 000 V in case of a.c. or 1 500 V in case of d.c.; – stationary or movable ASSEMBLIES with or without enclosure; – ASSEMBLIES intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment; – ASSEMBLIES designed for use under special service conditions, for example in ships and in rail vehicles provided that the other relevant specific requirements are complied with; – ASSEMBLIES designed for electrical equipment of machines provided that the other relevant specific requirements are complied with. This second edition cancels and replaces the first edition published in 2009. It constitutes a technical revision. This second edition includes the following significant technical changes with respect to the last edition of IEC 61439-1: – revision of service conditions in Clause 7; – numerous changes regarding verification methods in Clause 10; – modification of routine verification in respect of clearances and creepage distances (see 11.3); – adaption of the tables in Annex C and Annex D to the revised requirements and verification methods; – revision of the EMC requirements in Annex J; – shifting of tables from Annex H to new Annex N; – new Annex O with guidance on temperature rise verification; – new Annex P with a verification method for short-circuit withstand strength (integration of the content of IEC/TR 61117); – update of normative references; – general editorial review.

PDF Catalog

PDF Pages PDF Title
11 English

CONTENTS
17 INTRODUCTION
18 1 Scope
2 Normative references
21 3 Terms and definitions
3.1 General terms
23 3.2 Constructional units of assemblies
24 3.3 External design of assemblies
3.4 Structural parts of assemblies
26 3.5 Conditions of installation of assemblies
3.6 Insulation characteristics
29 3.7 Protection against electric shock
31 3.8 Characteristics
33 3.9 Verification
34 3.10 Manufacturer/user
4 Symbols and abbreviations
35 5 Interface characteristics
5.1 General
5.2 Voltage ratings
36 5.3 Current ratings
37 5.4 Rated diversity factor (RDF)
5.5 Rated frequency (fn)
5.6 Other characteristics
38 6 Information
6.1 assembly designation marking
6.2 Documentation
39 6.3 Device and/or component identification
7 Service conditions
7.1 Normal service conditions
40 7.2 Special service conditions
41 7.3 Conditions during transport, storage and installation
8 Constructional requirements
8.1 Strength of materials and parts
42 8.2 Degree of protection provided by an assembly enclosure
43 8.3 Clearances and creepage distances
45 8.4 Protection against electric shock
51 8.5 Incorporation of switching devices and components
53 8.6 Internal electrical circuits and connections
55 8.7 Cooling
8.8 Terminals for external conductors
57 9 Performance requirements
9.1 Dielectric properties
58 9.2 Temperature rise limits
9.3 Short-circuit protection and short-circuit withstand strength
59 9.4 Electromagnetic compatibility (EMC)
60 10 Design verification
10.1 General
61 10.2 Strength of materials and parts
65 10.3 Degree of protection of assemblies
10.4 Clearances and creepage distances
66 10.5 Protection against electric shock and integrity of protective circuits
67 10.6 Incorporation of switching devices and components
10.7 Internal electrical circuits and connections
10.8 Terminals for external conductors
10.9 Dielectric properties
70 10.10 Verification of temperature rise
80 10.11 Short-circuit withstand strength
86 10.12 Electromagnetic compatibility (EMC)
10.13 Mechanical operation
11 Routine verification
11.1 General
87 11.2 Degree of protection of enclosures
11.3 Clearances and creepage distances
11.4 Protection against electric shock and integrity of protective circuits
11.5 Incorporation of built-in components
11.6 Internal electrical circuits and connections
11.7 Terminals for external conductors
88 11.8 Mechanical operation
11.9 Dielectric properties
11.10 Wiring, operational performance and function
Tables

Table 1 – Minimum clearances in air a (8.3.2)
89 Table 2 – Minimum creepage distances (8.3.3)
Table 3 – Cross-sectional area of a copper protective conductor (8.4.3.2.2)
90 Table 4 – Conductor selection and installation requirements (8.6.4)
Table 5 – Minimum terminal capacity for copper protective conductors (PE, PEN) (8.8)
91 Table 6 – Temperature-rise limits (9.2)
92 Table 7 – Values for the factor n a (9.3.3)
Table 8 – Power-frequency withstand voltage for main circuits (10.9.2)
Table 9 – Power-frequency withstand voltage for auxiliary and control circuits (10.9.2)
93 Table 10 – Impulse withstand test voltages (10.9.3)
Table 11 – Copper test conductors for rated currents up to 400 A inclusive (10.10.2.3.2)
94 Table 12 – Copper test conductors for rated currents from 400 A to 4 000 A (10.10.2.3.2)
Table 13 – Short-circuit verification by comparison with a reference design:check list (10.5.3.3, 10.11.3 and 10.11.4)
95 Table 14 – Relationship between prospective fault current and diameter of copper wire
96 Annex A (normative) Minimum and maximum cross-section of copper conductors suitable
for connection to terminals for external conductors (see 8.8)
Table A.1 – Cross-section of copper conductors suitable for connection to terminals for external conductors
97 Annex B (normative) Method of calculating the cross-sectional area of protective conductors
with regard to thermal stresses due to currents of short duration
Table B.1 – Values of k for insulated protective conductors not incorporated in cables,
or bare protective conductors in contact with cable covering
98 Annex C (informative)
User information template
Table C.1 – Template
102 Annex D (informative)
Design verification
Table D.1 – List of design verifications to be performed
103 Annex E (informative)
Rated diversity factor
104 Figures

Figure E.1 – Typical assembly
105 Table E.1 – Examples of loading for an assembly with a rated diversity factor of 0,8
106 Figure E.2 – Example 1: Table E.1 – Functional unit loading for an assembly with a rated diversity factor of 0,8
107 Figure E.3 – Example 2: Table E.1 – Functional unit loading for an assembly with a rated diversity factor of 0,8
108 Figure E.4 – Example 3: Table E.1 – Functional unit loading for an assembly with a rated diversity factor of 0,8
109 Figure E.5 – Example 4: Table E.1 – Functional unit loading for an assembly with a rated diversity factor of 0,8
110 Figure E.6 – Example of average heating effect calculation
Table E.2 – Example of loading of a group of circuits (Section B – Figure E.1) with a rated diversity factor of 0,9
Table E.3 – Example of loading of a group of circuits (Sub-distribution board – Figure E.1) with a rated diversity factor of 0,9
111 Figure E.7 – Example graph for the relation between the equivalent RDF and the parameters at intermittent duty at t1 = 0,5 s, I1 = 7*I2 at different cycle times
Figure E.8 – Example graph for the relation between the equivalent RDF and the parameters at intermittent duty at I1 = I2 (no starting overcurrent)
112 Annex F (normative)
Measurement of clearances and creepage distances
Table F.1 – Minimum width of grooves
116 Figure F.1 – Measurement of ribs
117 Annex G (normative) Correlation between the nominal voltage of the supply system
and the rated impulse withstand voltage of the equipment
118 Table G.1 – Correspondence between the nominal voltage of the supply system and the equipment rated impulse withstand voltage
119 Annex H (informative)
Operating current and power loss of copper conductors
Table H.1 – Operating current and power loss of single-core copper cables with a permissible conductor temperature of 70 °C (ambient temperature inside the assembly: 55 °C)
120 Table H.2 – Reduction factor k1 for cables with a permissible conductor temperature of 70 °C (extract from IEC 60364-5-52:2009, Table B.52.14)
121 Annex I (Void)
122 Annex J (normative)
Electromagnetic compatibility (EMC)
Figure J.1 – Examples of ports
126 Table J.1 – Tests for EMC immunity for environment A(see J.10.12.1)
127 Table J.2 – Tests for EMC immunity for environment B(see J.10.12.1)
128 Table J.3 – Acceptance criteria when electromagnetic disturbances are present
129 Annex K (normative)
Protection by electrical separation
131 Table K.1 – Maximum disconnecting times for TN systems
132 Annex L (informative)
Clearances and creepage distances for North American region
Table L.1 – Minimum clearances in air
Table L.2 – Minimum creepage distances
133 Annex M (informative)
North American temperature rise limits
Table M.1 – North American temperature rise limits
134 Annex N (normative)
Operating current and power loss of bare copper bars
Table N.1 – Operating current and power loss of bare copper bars with rectangular cross-section, run horizontally and arranged with their largest face vertical, frequency 50 Hz to 60 Hz (ambient temperature inside the assembly: 55 °C, temperature of the conductor 70 °C)
135 Table N.2 – Factor k4 for different temperatures of the air inside the assembly and/or for the conductors
136 Annex O (informative)
Guidance on temperature rise verification
140 Figure O.1 – Temperature rise verification methods
141 Annex P (normative) Verification of the short-circuit withstand strength of busbar structures
by comparison with a tested reference design by calculation
Figure P.1 – Tested busbar structure (TS)
142 Figure P.2 – Non tested busbar structure (NTS)
144 Figure P.3 – Angular busbar configuration with supports at the corners
145 Bibliography

Related products

BS EN 61439-1:2011
$215.11