Siemens SIMOTICS T-1FW3 Configuration Manual page 40

Mechanical properties
3.1 Cooling
Note
Cooling circuits
Only closed and semi-open cooling circuits are permissible for motors. Converter systems
must be connected before the motors in the cooling circuit.
Figure 3-1
Equipotential bonding
Electric shock as a result of incorrectly routing the cooling water pipes
If electrically conductive cooling water pipes come into contact with live parts, this can
cause an electric shock leading to death or severe injury.
• Ensure adequate insulation.
• Securely fasten the pipes.
● Provide all components in the cooling system (motor, heat exchanger, piping system,
pump, pressure equalization tank, etc.) with equipotential bonding.
● Implement the equipotential bonding using a copper rail or finely stranded copper cable
with the appropriate conductor cross-sections.
38
Example of a semi-open cooling circuit
WARNING
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA