A great deal of uncertainty arises with regard to the protection of transformers. What do the symbols IP21 or IP56 mean? Which transformer should be selected when it is to operate indoors, outdoors, in a mine or under water? So how should the IPXX designations be read, where XX stands for two digits?
The first digit defines the degree of protection of persons against touching or approaching live parts, against contact with parts inside the enclosure, and the protection of the equipment inside the enclosure against the harmful ingress of solid foreign objects.
The second digit defines the degree of protection of the equipment inside the enclosure against the harmful ingress of water.
Omitting XX after the IP symbol means no protection, i.e. the designation IP00.
Degrees of protection indicated by the first digit:
|
Digit
|
Description
|
|
0
|
Non-protected |
|
1
|
Protected against solid foreign objects larger than 50mm |
|
2
|
Protected against solid foreign objects larger than 12.5mm |
|
3
|
Protected against solid foreign objects larger than 2.5mm |
|
4
|
Protected against solid foreign objects larger than 1mm |
|
5
|
Dust protected |
|
6
|
Dust tight |
Degrees of protection indicated by the second digit:
|
Digit
|
Description
|
|
0
|
Non-protected |
|
1
|
Protected against vertically falling water drops |
|
2
|
Protected against vertically falling water drops when the enclosure is tilted by an angle of up to 15○ |
|
3
|
Protected against spraying water |
|
4
|
Protected against splashing water |
|
5
|
Protected against water jets |
|
6
|
Protected against powerful water jets |
|
7
|
Protected against the effects of temporary immersion in water |
|
8
|
Protected against the effects of continuous immersion in water |
Click to view products with an IP00 degree of protection.
We also offer products with a higher degree of protection.
Krzysztof Majewski MSc Eng
Sales Department Manager
Breve-Tufvassons
