IEC 63522-14:2025

IEC 63522-14 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –
Part 14: Mould growth
Relais électriques – Essais et mesurages –
Partie 14: Moisissures
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IEC 63522-14 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical relays – Tests and measurements –

Part 14: Mould growth
Relais électriques – Essais et mesurages –

Partie 14: Moisissures
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.70  ISBN 978-2-8327-0156-0

– 2 – IEC 63522-14:2025 © IEC 2025
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test procedure . 6
4.1 Purpose . 6
4.2 Procedure . 6
4.3 Conditions . 6
5 Evaluation . 6
5.1 General . 6
5.2 Test report . 7
Bibliography . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RELAYS – TESTS AND MEASUREMENTS –

Part 14: Mould growth
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 this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 63522-14 has been prepared by IEC technical committee 94: Electrical relays. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
94/1059/FDIS 94/1110/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 4 – IEC 63522-14:2025 © IEC 2025
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63522 series, published under the general title Electrical relays –
Tests and measurements, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
ELECTRICAL RELAYS – TESTS AND MEASUREMENTS –

Part 14: Mould growth
1 Scope
This part of IEC 63522 is used for testing along with the appropriate severities and conditions
for measurements and tests designed to assess the ability of DUTs to perform under expected
conditions of transportation, storage and all aspects of operational use.
This document defines a test for determining the extent to which electrical relays support mould
growth and how any mould growth can affect the performance and other relevant
properties/functions of a relay.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-10:2005, Environmental testing – Part 2-10: Tests – Test J and guidance: Mould
growth
IEC 60068-2-10:2005/AMD1:2018
IEC 63522-0 , Electrical relays – Tests and measurements – Part 0: General and guidance
IEC 63522-7, Electrical relays – Tests and measurements – Part 7: Functional tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 63522-0 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
___________
Under preparation. Stage at the time of publication: IEC CCDV 63522-0:2024.

– 6 – IEC 63522-14:2025 © IEC 2025
4 Test procedure
4.1 Purpose
The purpose of this test procedure is to assess the extent of mould growth on a relay, or the
effect of mould growth on the function of a relay.
4.2 Procedure
The test shall be carried out in accordance with test J of IEC 60068-2-10 and, if not otherwise
specified by the manufacturer or application standards, in accordance with test variant 1 with a
test duration of 28 days (severity 1) applies.
As part of the initial measurements, all DUTs shall be tested in accordance with
IEC 60068-2-10:2005, Clause 9 and with IEC 635
...