Siemens SIMOTICS 1PQ8 Operating Instructions Manual page 27

Item
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Rotors
The rotor assembly is pressed onto the shaft together with the cage winding. The drive end of
the shaft usually has a cylindrical shaft end. Dependent on the design, a second shaft end
may be located at the non-drive end.
Cooling
The cooling system is designed as a closed, internal cooling circuit. The heat lost from the
machine is dissipated to the ambient air via the machine's surface. A shaft-mounted fan moves
the cooling air in the primary circuit. Movement of the cooling air in the external circuit is
generated by a separately-driven fan unit.
External fan
The machine is fitted with an external fan. For IC 666, there are two external fans. The electrical
connection data are stamped on the rating plate of the external fan.
Roller-contact bearings
The machines are equipped with different types of rolling-contact bearings depending on the
version and the operating conditions described in the order. The different types are listed on
the lubricant plate of the machine. In converter operation an insulated bearing is usually
installed on the non-drive end. The following roller-contact bearing variants are available:
Table 3-4
Version
Horizontal type of construc‐
tion, coupling output
Horizontal type of construc‐
tion, increased transverse
forces e.g. in the case of belt
coupling
SIMOTICS TN Series N-compact 1PQ8
Operating Instructions 11/2018
Description
Type of construction
Temperature class
Rated voltage [V] and connections
Rated frequency [Hz]
(Content depending on the version)
Rated current [A]
Rated power [kW]
Power factor [cos φ]
Roller-contact bearing variants
Roller-contact bearings
● Drive end: Deep-groove ball bearing as a fixed bearing
● Non-drive end: Deep-groove ball bearing as a floating bearing with
● Drive end: Cylindrical-roller bearing as a floating bearing
● Non-drive end: Deep-groove ball bearing as a fixed bearing
Item
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axial compression springs
Description
Certificate number
Degree of protection
Rotor class
Motor weight [kg]
Additional information (optional)
Maximum speed [rpm]
Country of manufacture / City
Description
27