Degree Of Protection - Siemens SINAMICS S120 Configuration Manual

Application
2.1 Environment
2.1.4

Degree of protection

The degree of protection designation in accordance with EN 60034-5 and 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 most cooling lubricants used in machine tools and transfer machines are oily,
creepcapable, and/or corrosive, protection against water alone is insufficient. The servo
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.
Sealing of the motor shaft
Table 2-4
Degree of
protection
accdg. to
EN 60034-5)
IP64
IP65
(AS flange IP67)
28
Sealing of the motor shaft
Shaft sealing using
Ball bearing
Radial shaft seal DIN 3760
Configuration Manual, (PFK7S), Edition 12.2006, 6SN1197-0AD16-0BP1
Area of application
It is not permissible that there is any
moisture in the area around the shaft and
the flange.
Note:
For IP 64 degree of protection it is not
permissible that liquid collects in the
flange.
Shaft outlet is not dust-tight
For gearbox mounting (for gearboxes that
are not sealed) to seal against oil.
The sealing lip must be adequately cooled
and lubricated by the gearbox oil in order
to guarantee reliable function.
Lifetime 5000 h - 10000 h (nominal value)
If a radial shaft sealing ring runs dry, then
this has a negative impact on the
functionality and the lifetime.
Synchronous Motors 1FK7