Siemens 1PH818 Operating Instructions & Installation Instructions page 25

Cooling water-cooled motors
Cooling circuit
The cooling circuit consists of an enclosed, internal air circulation, which is driven by the shaft-
mounted fans and stainless steel tubes that are directly integrated into the laminated stator
core; cooling type IC 71W according to IEC / EN 60034‑6.
Cooling capacity
To ensure adequate cooling of the motor, it is essential to adhere to the specified cooling water
rate, temperature and cooling water quality (Page 29).
Cooling with external fan
The machine has cooling method IC 416 in accordance with IEC / EN 60034-6. The separately
driven fan unit and the terminal box can be mounted in a different position depending on the
order.
Improper use of the external fan
Improper use of the external fan can result in death, serious injury, and material damage.
● Observe and follow the operating instructions of the external fan.
External fan with three-phase motor
For 1PH828. motors, external fans with three-phase motor are used as standard.
Using option L75, these external fans can also be used for 1PH818. and 1PH822. types instead
of the EC external fan.
EC external fan
For 1PH818. and 1PH822. motors, EC external fans with EC motors are used. This are
especially designed fan units for this motor series, with a permanently set operating speed.
See also
Operating instructions of the EC external fan (Page 163)
Degree of protection
Depending on the version, the machine has degree of protection IP23 or IP55.
SIMOTICS M-1PH8 1PH818., 1PH822.
Operating Instructions 07/2016
WARNING
Description
25