The degree of protection designation in accordance with EN 60034 5 (IEC 60034 5) is made using the letters "IP" and two digits (e.g., IP64). The second digit in the degree of protection designation represents the protection against water, the first digit the protection against penetration of foreign matter.
Since coolants used for machine tools and transfer machines usually contain oil, are able to creep, and may also be corrosive, protection against water alone is insufficient. The indicated degree of protection should only be considered here as a guideline. The motors must be protected by suitable covers. Attention must be paid to providing suitable sealing of the motor shaft for the selected degree of protection for the motor.
The table can serve as a decision aid for selecting the proper degree of protection for motors. For a mounting position with vertical shaft end IM V3/IM V19, static fluid on the flange is only permitted with degree of protection IP67/IP68 and recessed DE flange in some cases.
|
Liquids |
General workshop environment |
Water; |
Creep oil; petroleum; |
|---|---|---|---|
|
Effect |
|||
|
Dry |
IP64 |
– |
– |
|
Water-enriched environment |
– |
IP64 |
IP67 1) |
|
Mist |
IP65 |
IP67 |
|
|
Spray |
– |
IP65 |
IP68 |
|
Jet |
– |
IP67 |
IP68 |
|
Surge, brief immersion; constant inundation |
– |
IP67 |
IP68 |
1) IP64 with dry run at shaft exit.