Siemens SIMOTICS TN Series Operating & Installation Instructions Manual page 23

Item
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
Efficiency requirement
According to EU Regulation (EC) No. 640/2009, the IE3 efficiency requirement for low-voltage
motors with a power of 7.5 kW to 375 kW for line operation has been in force since January
01, 2015.
From January 1, 2017, the IE3 efficiency requirement for motors with a power of 0.75 kW to
375 kW applies for line operation.
Efficiency IE2 still applies for motors that are operated from a converter.
Please note the applicable country-specific rules and regulations.
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 an open cooling circuit. The machine is cooled using
ambient air. The ambient air is drawn in by shaft-mounted fans and guided through the
machine.
Fan
● The internal fans are bidirectional.
● External fan:
SIMOTICS TN Series N-compact 1LL8
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]
– Machines with four poles and more as well as 1L.831.‑2: The external fans are
bidirectional.
– Two-pole machines except 1L.831.‑2: The external fans are unidirectional. The
machines have an additional label on the end shield and on the rating plate with an
arrow indicating the direction of rotation.
The 1L.831.‑2 can optionally also be equipped with a unidirectional external fan.
Item Description
(15) Certificate number
(16) Degree of protection
(17) Rotor class
(18) Motor weight [kg]
(19) Additional information (optional)
(20) Maximum speed [rpm]
(21) Country of manufacture / City
Description
23