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Standards for contact crimping
Tests against standard
Many existing products for electrical
terminals are older than IEC 61238-1-1,
this does not mean that they have to be
retested against the new standard to
be acceptable, the standard they were
tested against at launch applies. This is
rarely a problem as they are likely to be
SEK - Svensk elstandard, https://elstandard.se/
used in installations of the same age.
In newer installations with higher
demands on current and temperature, it
is important to choose materials tested
Standards for electrical terminals according to current standards.
SEK Svensk Elstandard is appointed by
the government to be responsible for all Crimp results
standardisation within the electrical area
in Sweden. For a good crimp result, you have to
The Standards are established mainly ensure clean conductor surfaces, without
through international and European visible oxide layers.
collaborations within the International A good cable stripper guarantees clean
Electrotechnical Commission (IEC) and stripping without damage to individual
CENELEC (Comite’ Européen de Normali- strands, follow Elpress instructions for
sation Electrotechnique). SEK represents IEC, https://www.iec.ch/ stripping lengths.
and coordinates Swedish companies and Crimping tools should be checked before
authorities. starting work, to avoid the risk of injury
These standards are available on the SEK and to ensure a good result.
website. There are also manuals that The crimp dies are the key to a success-
show regulations and recommendations ful crimping process, whether they are
for different types of installations. hydraulically or manually operated.
For type testing of electrical terminals, It very important that all tool parts are
the current standard is IEC 61238-1-1, it kept dry and clean and that they are
supersedes all national standards. regularly checked for damage.
It has been active since 1993 and was last CENELEC, https://www.cenelec.eu/ Damage and/or contamination of tool
updated in 2018 and is thus the standard parts can lead to a deterioration in the
that best meets the requirements that end result and shortened tool life.
can be imposed on today’s installations.
In addition to this, there are a large
number of more industry-specific
standards for railways or switchgear
where, in addition to the requirements of
IEC 61238-1-1, there may be a need for
vibration and environmental testing.
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