Mechanical properties
3.3 Types of construction
1FT2 synchronous motors for SINAMICS S120
34 Configuration Manual, 03/2021, A5E50645584B AA
Sealing of the motor shaft
It is not permissible that there is
any moisture in the area around
the shaft and the flange.
With degree of protection IP64, it is
not permissible for liquid to collect
in the flange.
Radial shaft sealing ring without annular
spring
Sealing of the shaft exit against splash-
water or coolant. It is permissible that
the radial shaft sealing ring runs dry.
Lifetime approx. 25000 h (nominal
value).
With degree of protection IP65, it is not
permissible for liquid to collect in the
flange.
Radial shaft sealing ring
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 approx. 10000 h (nominal value).
If a radial shaft sealing ring runs dry, then
this has a significant negative impact on the
functionality and the lifetime.
For additional information, see Chapter "Shaft extension (Page 35)".
3.3 Types of construction
Table 3- 1 Designation of types of construction (acc. to IEC 60034-7)
The motors can be used in types of construction IM V1 and
IM V3 without having to order anything special.
Note:
When configuring the IM V3 type of construction, attention
must be paid to the permissible axial forces (force due to the
weight of the drive elements) and especially to the necessary
degree of protection.
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