Water Cooling - Siemens SIMOTICS M 1PH8 Configuration Manual

Table 4-6 Diameter, minimum air flow and pressure drop
Shaft height
mm
180
225
280
4.1.3

Water cooling

Defective work on the cooling circuit
Defective work on the cooling circuit can cause injury and/or damage to property.
• Only qualified personnel may assemble, install, and commission the cooling circuit.
• Perform installation or service work on the cooling circuit only when the system is de-
The electrochemical processes that take place in a cooling system must be minimized by
choosing the right materials. For this reason, mixed installations, i.e. a combination of different
materials, such as copper, brass, iron, or halogenated plastic (PVC hoses and seals), should not
be used or should be limited to the absolutely essential minimum.
There are 3 types of cooling circuits:
• Closed cooling circuit
• Semi-open cooling circuit
• Open cooling circuit
Table 4-7
Definition
Closed cooling circuit
Semi-open cooling circuit Oxygen can only enter the cooling system through the pressure equalization
Open cooling circuit (tow‐
er system)
1PH8 SIMOTICS M main motors
Configuration Manual, 12/2022, A5E51895839A
Diameter Degree of protection
mm
300 IP23
IP55
350 IP23
IP55
Adapter required IP23
IP55
WARNING
energized.
Description of the various cooling circuits
Description
The pressure equalizing vessel is closed (oxygen cannot enter the system)
and has a pressure relief valve. The coolant is only routed in the motors and
converters as well as the components required to dissipate heat.
vessel, otherwise the same as "closed cooling circuit."
The coolant is cooled in a tower. In this case, there is intensive oxygen con‐
tact.
Mechanical properties
Minimum air quantity Pressure drop
m /s Pa
3
0.21 450
0.17 550
0.33 600
0.31 650
0.52 600
0.42 600
4.1 Cooling
71