Amendment 1 - Connectors for DC-application in photovoltaic systems - Safety requirements and tests

Amendement 1 - Connecteurs pour applications en courant continu pour systèmes photovoltaïques - Exigences de sécurité et essais

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Status
Published
Publication Date
24-Mar-2020
Current Stage
PPUB - Publication issued
Completion Date
25-Mar-2020
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IEC 62852:2014/AMD1:2020 - Amendment 1 - Connectors for DC-application in photovoltaic systems - Safety requirements and tests
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IEC 62852
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Connectors for DC-application in photovoltaic systems – Safety requirements
and tests
Connecteurs pour applications en courant continu pour systèmes
photovoltaïques – Exigences de sécurité et essais
IEC 62852:2014-11/AMD1:2020-03(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62852
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Connectors for DC-application in photovoltaic systems – Safety requirements
and tests
Connecteurs pour applications en courant continu pour systèmes
photovoltaïques – Exigences de sécurité et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-7867-3

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62852:2014/AMD1:2020
© IEC 2020
FOREWORD

This amendment has been prepared by IEC technical committee 82: Solar photovoltaic energy

systems.
The text of this amendment is based on the following documents:
FDIS Report on voting
82/1646/FDIS 82/1667/RVD

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of this amendment and the base 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
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
1 Scope
Add the following new sentence after the last paragraph:

This document does not apply to connectors for data collection, tracker controls or similar, but

it may be used as a guide for those connectors.
2 Normative references
Delete all year dates.
Add the following new references:

IEC 60112, Method for the determination of the proof and the comparative tracking indices of

solid insulating materials

IEC 60216-1, Electrical insulating materials – Thermal endurance properties – Part 1: Ageing

procedures and evaluation of test results

IEC 60216-5, Electrical insulating materials – Thermal endurance properties – Part 5:

Determination of relative thermal endurance index (RTE) of an insulating material

---------------------- Page: 4 ----------------------
IEC 62852:2014/AMD1:2020 – 3 –
© IEC 2020

IEC TR 60664-2-1, Insulation coordination for equipment within low-voltage systems –

Part 2-1: Application guide – Explanation of the application of the IEC 60664 series,

dimensioning examples and dielectric testing

IEC 62930, Electric cables for photovoltaic systems with a voltage rating of 1,5 kV DC

ISO 868, Plastics and ebonite – Determination of indentation hardness by means of a

durometer (Shore hardness)
Replace:

IEC 61215:2005, Crystalline silicon terrestrial photovoltaic (PV) modules – Design

qualification and type approval
by:

IEC 61215-2, Terrestrial photovoltaic (PV) modules – Design qualification and type approval –

Part 2: Test procedures
Replace:
IEC TS 62548, Photovoltaic (PV) arrays – Design requirements
by:
IEC 62548, Photovoltaic (PV) arrays – Design requirements
3 Terms and definitions
Replace:
3.13
ambient temperature
by:
3.13
maximum ambient temperature
5 Constructional requirements and performance
5.1 General
Replace the existing third paragraph by the following:

Multi-way connectors shall be designed so that these requirements for earth-faulted and

short-circuit-proofed installation complies with IEC 62548 or IEC 60364-7-712.
5.2 Marking and identification
5.2.1 Identification
Replace the existing item h) by the following:

h) specified temperatures: ULT, LLT, maximum ambient temperature (minimum +85 °C);

---------------------- Page: 5 ----------------------
– 4 – IEC 62852:2014/AMD1:2020
© IEC 2020
Add the following new item n):

n) RTE/RTI or TI (mechanical and electrical) of all polymeric insulating materials used in the

connector.
5.7 General design
Replace the existing subclause 5.7.2 by the following:

5.7.2 Connectors shall be so designed that connection of conductors of the type and cross-

sectional areas as described in 5.7.3 and as specified by the manufacturer is possible.

Besides the termination of the conductor, care shall be taken that no damage of the insulation

is possible, e.g. by avoiding sharp edges.
Replace the existing subclause 5.7.3 by the following:

5.7.3 Cables connected to the connector shall be suitable for use in photovoltaic systems

and shall comply with the requirements of IEC 62930. The values of the rated current and the

rated voltage shall have at least the rated values of the connector.

The class of the conductor shall be Class 5 in accordance with IEC 60228, Class 2

conductors are allowed for cables intended for fixed installation.
5.13 Temperature rise

Add, at the end of the first sentence, the following after the word “temperature”:

(ULT)
5.14 Cable anchorage
Replace the existing subclause 5.14 by the following:
5.14.1 Connectors intended to be used with cables specified by the manufacturer

For connectors intended to be used with cables specified by the manufacturer, the tests shall

be performed with cables as stated by the manufacturer.

The unloaded cable shall be marked so that any displacement relative to the gland can be

easily detected.

The cable is pulled for a duration of 1 s, 50 times, without jerks in the direction of the axis with

the relevant force as specified in Table 13.

At the end of this period, the displacement shall not exceed 2 mm. This measurement shall be

carried out after unloading the force from the cable.

Afterwards the specimen shall be mounted in the test apparatus for torque test. The unloaded

cable shall be marked so that any torsion relative to the gland can be easily detected, and

then a torque as specified in Table 14 shall be applied for 1 min.
During test, the torsion shall not exceed 45°.
---------------------- Page: 6 ----------------------
IEC 62852:2014/AMD1:2020 – 5 –
© IEC 2020
5.14.2 Connectors intended to be used with generic cables

A test mandrel equivalent to the minimum value of the anchorage range of the cable gland as

specified by the manufacturer or supplier, with a sheath thickness as specified in Table 13

shall be fixed to the sample.

The unloaded test mandrel shall be marked so that any displacement relative to the gland can

be easily detected.

The test mandrel shall be pulled for a duration of 1 s, 50 times, without jerks in the direction

of the axis with the relevant force as specified in Table 13.

At the end of this period, the displacement shall not exceed 2 mm. This measurement is to be

carried out after unloading the force from the test mandrel.

Unless otherwise specified, test mandrels shall consist of a metallic rod with an elastomeric

sheath having a hardness of 70 Shore D ± 10 points in accordance with ISO 868 and a sheath

thickness as specified in Table 13 or Table 14. The complete test mandrel shall have a

tolerance of ± 0,2 mm for mandrels up to and including 16 mm diameter and ± 0,3 mm for

mandrels larger than 16 mm diameter. The shape shall be circular or a profile simulating the

outer dimension of the cable as specified by the manufacturer or supplier.
Table 13 – Pull forces for cord anchorage
Cable diameter Pull force Minimum sheath thickness of test mandrel
mm N mm
Up to 4 - 1
>4 to 8 30 1
>8 to 11 42 2
>11 to 16 55 2
>16 to 23 70 2
>23 to 31 80 2
>31 to 43 90 2
>43 to 55 100 2
>55 115 2
For cable diameters up to 4 mm, a suitable non-metallic mandrel may be used.
Afterwards the specimen shall be mounted in the test apparatus for torque test.

The unloaded mandrel shall be marked so that any torsion relative to the gland can be easily

detected, and then a torque specified in Table 14 is applied for 1 min.
During test, the torsion shall not exceed 45°.

The torsion test shall be performed by using a test mandrel equivalent to the maximum value

of the anchorage range of the cable gland as specified by the manufacturer or supplier, with a

torque for the appropriate maximum cable diameter as specified in Table 14.
---------------------- Page: 7 ----------------------
– 6 – IEC 62852:2014/AMD1:2020
© IEC 2020
Table 14 – Values for torsion test
Cable diameter Torque Minimum sheath thickness of test mandrel
mm Nm mm
>4 to 8 0,10 1
>8 to 11 0,15 2
>11 to 16 0,35 2
>16 to 23 0,60 2
>23 to 31 0,80 2
>31 to 43 0,90 2
>43 to 55 1,00 2
>55 1,20 2

For metric cable glands meeting the requirements of IEC 62444 the tests described in this

subclause are not required.
5.19 Insulation parts
5.19.2 Outer accessible parts
Add the following new new item d):

d) approval of relative thermal endurance, relative thermal index or temperature index

(RTE/RTI or TI) in accordance with IEC 60216-5 or IEC 60216-1. Values shall be listed in

technical information.

NOTE Relevant RTI values evaluated in accordance to UL 746B are accepted as an alternative to RTE.

5.19.3 Inner parts
Add the following new item d):

d) approval of relative thermal endurance, relative thermal index or temperature index

(RTE/RTI or TI) in accordance with IEC 60216-5 or IEC 60216-1. Values shall be listed in

technical information.

NOTE Relevant RTI values evaluated in accordance to UL 746B are accepted as an alternative to RTE.

6.3.5 Mechanical operation
Replace the first sentence of the first dashed item by:

– the specimens shall be engaged and disengaged by means of a device simulating normal

operating conditions for a number of cycles specified by the manufacturer.
6.3.12 Damp heat test
Replace the second sentence by:
Severity according to IEC 61215-2:2016, 4.13:
---------------------- Page: 8 ----------------------
IEC 62852:2014/AMD1:2020 – 7 –
© IEC 2020
...

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