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Mechanical impact resistance

Date:2017-12-20 09:21:49 View PDF

An additional number has sometimes been used to specify the resistance of equipment to mechanical impact. This mechanical impact is identified by the energy needed to qualify a specified resistance level, which is measured in joules (J). This has now been superseded by the separate 'IK code' specified in EN 62262.

Although dropped from the 3rd edition of IEC 60529 onwards, and not present in the EN version, older enclosure specifications will sometimes be seen with an optional third IP digit denoting impact resistance. Newer products are likely to be given an IK rating instead. However there is not an exact correspondence of values between the old and new standards.

Dropped IP level

Impact energy

Equivalent drop mass and height

0

1

0.225 J

150 g dropped from 15 cm

2

0.375 J

250 g dropped from 15 cm

3

0.5 J

250 g dropped from 20 cm

5

2 J

500 g dropped from 40 cm

7

6 J

1.5 kg dropped from 40 cm

9

20 J

5.0 kg dropped from 40 cm

IK

number

Impact energy (joules)

 Equivalent impact

00

Unprotected

No test

01

0.15

Drop of 200 g object from 7.5 cm height

02

0.2

Drop of 200 g object from 10 cm height

03

0.35

Drop of 200 g object from 17.5 cm height

04

0.5

Drop of 200 g object from 25 cm height

05

0.7

Drop of 200 g object from 35 cm height

06

1

Drop of 500 g object from 20 cm height

07

2

Drop of 500 g object from 40 cm height

08

5

Drop of 1.7 kg object from 29.5 cm height

09

10

Drop of 5 kg object from 20 cm height

10

20

Drop of 5 kg object from 40 cm height

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