Direct current (DC) plugs and socket-outlets for information and communication technology (ICT) equipment installed in data centres and telecom central offices - Part 2: Plug and socket-outlet system for 5,2 kW

IEC TS 62735-2: 2016(E) applies to plugs and fixed socket-outlets for class I equipment with two active contacts plus an earthing contact, a rated power of 5,2 kW and a rated voltage range from 294 V to 400 V d.c. They are intended to power d.c. information and communication technology equipment only. The 2,6 kW system complying with Part 1 is safely compatible with the system complying with this part as it is possible to insert the 2,6 kW plug in the 5,2 kW socket-outlet but it is not possible to insert the 5,2 kW plug into the 2,6 kW socket-outlet.
This publication is to be read in conjunction with IEC TS 62735-1:2015

General Information

Status
Published
Publication Date
13-Dec-2016
Current Stage
PPUB - Publication issued
Completion Date
14-Dec-2016
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Technical specification
IEC TS 62735-2:2016 - Direct current (DC) plugs and socket-outlets for information and communication technology (ICT) equipment installed in data centres and telecom central offices - Part 2: Plug and socket-outlet system for 5,2 kW
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IEC TS 62735-2
Edition 1.0 2016-12
TECHNICAL
SPECIFICATION
Direct current (DC) plugs and socket-outlets for information and communication
technology (ICT) equipment installed in data centres and telecom central
offices –
Part 2: Plug and socket-outlet system for 5,2 kW
IEC TS 62735-2:2016-12(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC TS 62735-2
Edition 1.0 2016-12
TECHNICAL
SPECIFICATION
Direct current (DC) plugs and socket-outlets for information and communication
technology (ICT) equipment installed in data centres and telecom central
offices –
Part 2: Plug and socket-outlet system for 5,2 kW
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.01; 29.120.30 ISBN 978-2-8322-3708-3

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC TS 62735-2:2016 © IEC 2016
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 General requirements ...................................................................................................... 7

5 General notes on tests .................................................................................................... 7

6 Ratings ............................................................................................................................ 7

7 Classification ................................................................................................................... 7

8 Marking ........................................................................................................................... 7

9 Checking of dimensions ................................................................................................... 8

10 Protection against electric shock ..................................................................................... 8

11 Provision for earthing ...................................................................................................... 8

12 Terminals and terminations .............................................................................................. 8

13 Construction of socket-outlets ....................................................................................... 11

14 Construction of plugs ..................................................................................................... 11

15 Interlocked plug and socket-outlet systems .................................................................... 12

16 Resistance to ageing, protection provided by enclosures, and resistance to

humidity ......................................................................................................................... 12

17 Insulation resistance and electric strength ..................................................................... 12

18 Operation of earthing contacts ....................................................................................... 13

19 Temperature rise ........................................................................................................... 13

20 Breaking capacity .......................................................................................................... 14

21 Normal operation ........................................................................................................... 14

22 Force necessary to withdraw the plug ............................................................................ 14

23 Flexible cables and their connection .............................................................................. 15

24 Mechanical strength ...................................................................................................... 16

25 Resistance to heat ......................................................................................................... 16

26 Screws, current-carrying parts and connections ............................................................. 16

27 Creepage distances, clearances and distances through sealing compound .................... 16

28 Resistance of insulating material to abnormal heat and to fire ....................................... 16

29 Resistance to rusting ..................................................................................................... 16

Annexes ............................................................................................................................... 16

Annex AA (normative) Standard sheets and gauges ............................................................. 17

Bibliography .......................................................................................................................... 21

Figure AA.1 – Standard sheet 4: 5,2 kW / 294 V to 400 V d.c. socket-outlet for class I

equipment ............................................................................................................................. 18

Figure AA.2 – Standard sheet 5: 5,2 kW / 294 V to 400 V d.c. plug for class I

equipment ............................................................................................................................. 19

Figure AA.3 – Standard sheet 6: positioning of the “+” and “−” pins/socket-contacts ............. 20

Table 1 – Relationship between rated power and connectable nominal cross-sectional

areas or American Wire Gauge (AWG) size of copper conductors ........................................... 9

---------------------- Page: 4 ----------------------
IEC TS 62735-2:2016 © IEC 2016 – 3 –

Table 2 – Values for pull test for screw-type terminals ............................................................ 9

Table 3 – Composition of conductors for plugs ........................................................................ 9

Table 5 – Relationship between rated power and connectable cross-sectional areas or

AWG size of copper conductors for screwless terminals ....................................................... 10

Table 6 – Value for pull test for screwless-type terminals ...................................................... 10

Table 7 – Values for flexing under mechanical load test for copper conductors ..................... 10

Table 8 – Test current for the verification of electrical and thermal stresses in normal

use for screwless terminals ................................................................................................... 10

Table 9 – Nominal cross-sectional areas or AWG size of rigid copper conductors for

deflection test of screwless terminals .................................................................................... 11

Table 10 – Deflection test forces ........................................................................................... 11

Table 14 – External cable dimension limits for surface-type socket-outlets ........................... 11

Table 15 – Nominal cross-sectional areas of copper conductors and test currents for

the temperature rise test ....................................................................................................... 13

Table 16 – Maximum and minimum withdrawal force for plugs and socket-outlets ................. 15

Table 17 – External dimensions of flexible cables to be accommodated by cord

anchorages ........................................................................................................................... 15

Table 18 – Torque test values for cord anchorages ............................................................... 15

Table 19 – Maximum dimensions of flexible cables to be accommodated in rewirable

accessories .......................................................................................................................... 16

---------------------- Page: 5 ----------------------
– 4 – IEC TS 62735-2:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIRECT CURRENT (DC) PLUGS AND SOCKET-OUTLETS FOR
INFORMATION AND COMMUNICATION TECHNOLOGY (ICT) EQUIPMENT
INSTALLED IN DATA CENTRES AND TELECOM CENTRAL OFFICES –
Part 2: Plug and socket-outlet system for 5,2 kW
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

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6) All users should ensure that they have the latest edition of this publication.

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

The main task of IEC technical committees is to prepare International Standards. In

exceptional circumstances, a technical committee may propose the publication of a technical

specification when

• the required support cannot be obtained for the publication of an International Standard,

despite repeated efforts, or

• the subject is still under technical development or where, for any other reason, there is the

future but no immediate possibility of an agreement on an International Standard.

Technical specifications are subject to review within three years of publication to decide

whether they can be transformed into International Standards.

IEC TS 62735-2, which is a technical specification, has been prepared by IEC technical

committee 23: Electrical accessories.
---------------------- Page: 6 ----------------------
IEC TS 62735-2:2016 © IEC 2016 – 5 –
This technical specification is to be used in conjunction with IEC 62735-1:2015.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
23/743/DTS 23/745A/RVC

Full information on the voting for the approval of this technical specification can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This Part 2 supplements or modifies the corresponding clauses in IEC 62735-1 so as to

convert that publication into the IEC technical specification: Direct current (DC) plugs and

socket-outlets for information and communication technology (ICT) equipment installed in data

centres and telecom central offices.

Where this Part 2 states "addition", "modification" or "replacement", the relevant requirement,

test specification or explanatory matter in Part 1 should be adapted accordingly.

Where no change is necessary, this Part 2 indicates that the relevant clause or subclause

applies.
In this publication:
1) The following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.

2) Subclauses, notes, tables or figures which are additional to those in Part 1 are numbered

starting from 101 and additional list items are numbered from aa). Additional annexes are

lettered AA, BB, etc.

A list of all parts in the IEC 62735 series, published under the general title Direct current (DC)

plugs and socket-outlets for information and communication technology (ICT) equipment

installed in data centres and telecom central offices, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
---------------------- Page: 7 ----------------------
– 6 – IEC TS 62735-2:2016 © IEC 2016
DIRECT CURRENT (DC) PLUGS AND SOCKET-OUTLETS FOR
INFORMATION AND COMMUNICATION TECHNOLOGY (ICT) EQUIPMENT
INSTALLED IN DATA CENTRES AND TELECOM CENTRAL OFFICES –
Part 2: Plug and socket-outlet system for 5,2 kW
1 Scope
This clause of Part 1 is applicable except as follows:
Replacement:
Replace the first paragraph with the following:

This part of IEC 62735, which is a technical specification, applies to plugs and fixed socket-

outlets for class I equipment with two active contacts plus an earthing contact, a rated power

of 5,2 kW and a rated voltage range from 294 V to 400 V d.c. They are intended to power d.c.

information and communication technology equipment only.

The 2,6 kW system complying with Part 1 is safely compatible with the system complying with

this part as it is possible to insert the 2,6 kW plug in the 5,2 kW socket-outlet but it is not

possible to in
...

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