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Degrees of Protection of Explosion Protected Apparatus

Because products like - Explosion Protected Apparatus - is often used in outdoor installations and often come into contact with dust and wate, as well as with other enviromental influences caused by chemical media, explosion-protected electrical apparatus are subjected to particularly extreme operating conditions. In accordance with the constructional and test requirements explosion-protected apparatus must, therefore, satisfy the requirements for a minimum degree of protection, normally IP 54.

The IP degrees of protection according to EN 60529 are defined according to the protection against inadvert contact, foreign matter and water.

  • The degrees of protection against solid foreign matter are designated by the first code number.
  • Degrees of protection against water are designated by the second code number.

Exampe: IP 65: dust-tight, protected against jet water.

According to the test procedures for explosion protected apparatus the degree of protection has to be tested and meet the requirements after the necessary climate storage and impact tests. This is more harder to pass than the normal test according to IEC 60529

 

Degrees of protection according to IEC 60529

First Number Degree of protection Second Number Degree of Protection
       
0 No special protection. 0  No special protection.
1 Protection against solid foreign bodies Ø 50 mm. and larger. 1 Protected against vertically dripping water.
2 Protected against solid foreign bodies Ø 12,5 mm. and larger. 2 Protected against dripping water when enclosure is incliened up to 15°.
3 Protected against solid foreign bodies Ø 2,5 mm. and larger. 3 Protected against spary water being sprayed at an angle up to 60°.
4 Protected against foreign bodies Ø 1 mm. and larger. 4 Protected against splash water from any direction.
5 Dust protected. 5 Protected against jet water from any direction.
6 Dust tight. 6 Protected against powerful water jets from any direction.
    7 Protected against water intrusion when submerged for a limited time.
    8 Protected against water intrusion when submerged, time irrelevant.
 

Reservation:

 

It is the user's responsibility to ascertain if a particular product is safe and without risk to health and safety by virtue of its location in a hazardous area, i.e. classification of zones, gas groups, ignition temperatures, etc. Both the specifier and user should be thoroughly familiar with standard mentioned on this sites or any document within.

Whilst every care has been taken in the compilation of this document, we regrets that it cannot accept responsibility for any errors or omissions contained herein. Readers should not rely upon the information contained in this document or site without seeking specific safety advice and ensuring that their own particular circumstances are in accordance with the matters set out.

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