BS EN 61439-3:2012:2019 Edition
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Low-voltage switchgear and controlgear assemblies – Distribution boards intended to be operated by ordinary persons (DBO)
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 32 |
This part of IEC 61439 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO).
DBOs have the following criteria:
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intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications;
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outgoing circuits contain protective devices, intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, IEC 61008, IEC 61009, IEC 62423 and IEC 60269-3;
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rated voltage to earth does not exceed 300 V a.c.;
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rated current (Inc) of the outgoing circuits does not exceed 125 A and the rated current (InA) of the DBO does not exceed 250 A;
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intended for the distribution of electrical energy;
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enclosed, stationary;
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for indoor or outdoor use.
DBOs may also include control and/or signaling devices associated with the distribution of electrical energy.
This standard applies to all DBOs whether they are designed, manufactured and verified on a one-off basis or fully standardised and manufactured in quantity.
DBOs may be assembled outside the factory of the original manufacturer.
This standard does not apply to individual devices and self-contained components, such as circuit breakers, fuse switches, electronic equipment, etc. which will comply with the relevant product standards.
This standard does not apply to the specific types of ASSEMBLIES covered by other parts of IEC 61439.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 13 | English CONTENTS |
| 14 | FOREWORD |
| 16 | 1 Scope 2 Normative references |
| 17 | 3 Terms and definitions 4 Symbols and abbreviations 5 Interface characteristics |
| 18 | 6 Information 7 Service conditions |
| 19 | 8 Constructional requirements |
| 20 | 9 Performance requirements 10 Design verification |
| 23 | 11 Routine verification |
| 24 | Table 101 – Values of assumed loading Table 102 – Tightening torque values for the verification of mechanical strength |
| 25 | Figure 101 – Example of temperature rise verification by test of a complete DBO as in 10.10.2.3.6 |
| 26 | Annexes Annex D (informative) Design verification |
| 27 | Annex AA (informative) Items subject to agreement betweenthe assembly manufacturer and the user Table AA.1 – Items subject to agreement betweenthe assembly manufacturer and the user |
| 31 | Bibliography |
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BS EN 61439-3:2012:2015 Edition
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