PDF《Draft ETSI》

Draft ETSI EN

300 253 V2.

1.11 (2015-01) Environmental Engineering (EE);

Earthing and bonding of ICT equipment powered by -48 VDC in telecom and data center EUROPEAN STANDARD ETSI Draft ETSI EN

300 253 V2.1.11 (2015-01)

2 Reference REN/EE-0250 Keywords bonding, earthing, equipment practice ETSI

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742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice The present document can be downloaded from: http://www.etsi.org The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ? European Telecommunications Standards Institute 2015. All rights reserved. DECT TM , PLUGTESTS TM , UMTS TM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPP TM and LTE? are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM? and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI Draft ETSI EN

300 253 V2.1.11 (2015-01)

3 Contents Intellectual Property Rights.4 Foreword.4 Modal verbs terminology.5 Introduction

5 1 Scope.6

2 References.6 2.1 Normative references

6 2.2 Informative references.7

3 Definitions and abbreviations.7 3.1 Definitions.7 3.1.1 IEC definitions (by IEC

60050 numbers)7 3.1.2 Telecommunication definitions

8 3.2 Abbreviations

9 4 General requirements

10 4.1 Safety from electrical hazards

10 4.2 Signal reference.10 4.3 EMC performance.10

5 Requirements on bonding networks.10 5.1 Bonding configurations

10 5.2 CBN within a telecommunication building or data centre

10 5.3 BN within a telecommunication or ICT system

11 5.4 Merging of CBN and MESH-BNs

14 5.5 Cabling within and between BNs.14

6 Requirements for power distribution.14 6.1 DC power distribution of secondary supply.14 6.2 DC power distribution of tertiary supplies

14 6.3 AC mains distribution and bonding of the protective conductor.15 6.4 AC power distribution from tertiary power supply

15 Annex A (normative): Rationale about CBN co-ordination.16 Annex B (informative): Rationale about the integration of the DC return conductor into the merged CBN/MESH-BN

18 Annex C (normative): AC mains distribution and bonding of the protective conductor.20 Annex D (informative): Bibliography.24 History.25 ETSI Draft ETSI EN