General operating conditions

0

Non-protected

1

Protected against access to hazardous parts with the back of a hand. Protected against solid foreign objects of Ø 50 mm

2

Protected against access to hazardous parts with a finger. Protected against solid foreign objects of Ø 12.5 mm.

3

Protected against access to hazardous parts with a tool. Protected against solid foreign objects Ø 2.5 mm.

4

Protected against access to hazardous parts with a wire. Protected against solid foreign objects Ø 1 mm.

5

Protected against access to hazardous parts with a wire. Dust-protected. Intrusion of dust is not totally prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of the device or to impair safety.

6

Protected against access to hazardous parts with a wire. Dust-tight. No intrusion of dust.

0

Non-protected

1

Protected against water drops

2

Protected against water drops when enclosure tilted up to 15°.

3

Protected against spraying water. Water sprayed at an angle up to 60° on either side of the vertical shall have no harmful effects.

4

Protected against splashing water. Water splashed against the disclosure from any direction shall have no harmful effects

5

Protected against water jets

6

Protected against powerful water jets

7

Protected against the effects of temporary immersion in water. Intrusion of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed in water for 30 min. in 1 m depth.

Steam

at temperatures >100°C: not resistant

Sodium base liquor
(ph-Value > 12)

at room temperature: resistant
> 40°C: not resistant

Acetic acid

not resistant

Argon (technical clean)

resistant