How to
choose the IK code test apparatus?
IK coding system is to indicate the degrees of
protection provided by enclosures for electrical equipment against harmful
external mechanical impact, which is given by IEC62262. The code is consisted
by codes letters (IK) and characteristic group numbers (00 to 10), and each
characteristic group number standards for an impact value, the values as below:
IK code
IK00
IK01
IK02
IK03
IK04
IK05
IK06
IK07
IK08
IK09
IK10
Impact energy(J)
*
0.14
0.2
0.35
0.5
0.7
1
2
5
10
20
In
order to give a common standard to electrotechnical equipment, IEC60068-2-75
enviromental testing regarding hammer tests mentions three kinds of tool,
pendulum hammer, spring hammer, and vertical hammer. To obtain repeatable and
reproducible results, the test is more depends on the details of apparatus.
The
choice of the test apparatus depends on the orientation of the surface to be
tested and on the energy level. Not all methods can be used in every case. It
is self-evident that a pendulum hammer can only be used on vertical surfaces
without overhangings. Similarly the vertical hammer can normally only be used
on accessible horizontal surfaces. When the specimen cannot be moved or turned,
for any reason, the choice is limited. The advantage of the spring hammer is
that it can be used in any position, provided there is enough room to apply it correctly,
and that the specified impact energy does not exceed 2J. For higher energy
levels, a spring hammer would be too difficult to handle, and could even be
hazardous for the operator.
Hammer
test is widely applied to electric appliance, lamp and etc. For example,
according to IEC60598-1-2008 clause4.13.1, all the
LED lamps requires do the hammer impact test.
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How to choose the IK code test apparatus?