Siemens SIMOTICS T-1FW3 - Cooling

1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
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Mechanical properties
3
3.1 Cooling
WARNING
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-
energized.
Note
Cooling circuit
Only closed and semi
-open cooling circuits are permissible for motors.
3.1.1 Cooling circuit
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 limited to the absolutely essential minimum.
A differentiation is made between 3 different cooling circuits:
● Closed cooling circuit
● Semi-open cooling circuit
● Open cooling circuit
Table 3- 1 Description of the various cooling circuits
Definition
Description
Closed cooling circuit The pressure equalizing tank is closed (oxygen cannot enter the system)
and has a pressure relief valve. The cooling water is only routed in the
motors and converters as well as the components that have to be cooled.
Semi-open cooling circuit Oxygen can only enter the cooling system through the pressure equaliza-
tion tank, otherwise the same as "closed cooling circuit".
Open cooling circuit
(tower system)
The cooling water is cooled in a tower. In this case, there is intensive
oxygen contact.