Protection IP
The European standars CEI 70-1 defines the protection degree of an electrical machine (with voltage lower than 72,5KV) with the following system:
| 1° Figure | 2° Figure | 3° Value | Letter |
| 0... 6 | 0... 8 | IK00... IK10 | A... D |
The first figure indicates the protection against entering of solid bodies; the second figure indicates the protections against entering of liquids; the third paramenter insicates the mechanical resistance against impacts.
|
1° FIGURE |
Protection of the materials |
Protection of the persons (optional letter) |
|
| 0 |
Not Protected |
||
| 1 |
Protected against solid bodies bigger than 50mm |
A | Protected against entering of an hand |
| 2 | Protected against solid bodies bigger than 12mm | B | Protected against entering of a finger |
| 3 | Protected against solid bodies bigger than 2,5mm | C | Protected against entering of a tool |
| 4 | Protected against solid bodies bigger than 1mm | D | Protected against entering of a wire |
| 5 | Protected against harmful entering of dust and entering with a wire | ||
| 6 | Totally protected against dust and entering with a wire | ||
| 2° FIGURE | Protection of the materials |
| 0 | Not protected |
| 1 | Protected against vertical falling of water drops |
| 2 | Protected against falling of water drops with max inclination 15° |
| 3 | Protected against rain |
| 4 | Protected against water projections |
| 5 | Protected against water jets |
| 6 | Protected against waves |
| 7 | Protected against immersion of limited periods |
| 8 | Protected against immersion of long periods |
| 3° VALUE | Protection of the materials |
| IK00 | Not protected |
| IK01 | Protected against mechanical shocks/impacts of 0,15J |
| IK02 | Protected against mechanical shocks/impacts of 0,2J |
| IK03 | Protected against mechanical shocks/impacts of 0,35J |
| IK04 | Protected against mechanical shocks/impacts of 0,5J |
| IK05 | Protected against mechanical shocks/impacts of 0,7J |
| IK06 | Protected against mechanical shocks/impacts of 1J |
| IK07 | Protected against mechanical shocks/impacts of 2J |
| IK08 | Protected against mechanical shocks/impacts of 5J |
| IK09 | Protected against mechanical shocks/impacts of 10J |
| IK10 | Protected against mechanical shocks/impacts of 20J |