Requirements placed on the corrosion protection agent
The corrosion protection agent must comply with the following requirements:
• Basis is ethylene glycol (also "Ethandiol").
• Water and anticorrosion protection agent do not separate.
• The freezing point of the water used must be reduced down to at least ‑5°C.
• The corrosion protection agent used must be compatible with the ttings and hoses of the
cooling system as well as the materials used in the motor cooler.
Coordinate these requirements, especially the material compatibility, with the cooling
equipment manufacturer and the manufacturer of the corrosion protection agent.
Suitable mixture
• 25 % - 30 % ethylene glycol (= ethanediol)
• The water used contains a maximum of 2 g/l dissolved mineral salt and is largely free from
nitrates and phosphates
Recommended manufacturers are listed in the Appendix.
3.4.4 Temperature monitoring and thermal motor protection
3.4.4.1 Temperature monitoring circuits Temp-S and Temp-F
The motors are equipped with the two temperature monitoring circuits - Temp‑S and Temp‑F -
that are described below.
• Temp‑S activates the thermal motor protection when the motor windings are thermally
overloaded. In this case the precondition is that Temp-S is correctly connected and evaluated.
For a thermal overload, the drive system must bring the motor into a no-current condition.
• Temp-F is used for temperature monitoring and diagnostics during commissioning and in
operation.
Both temperature monitoring circuits are independent of one another.
For example, the SME12x Sensor Module or the TM120 Terminal Module evaluates the
temperature sensor signals.
You can obtain commissioning information from Technical Support. Contact data is provided in
the introduction.
Temp‑S
All motors are equipped with the following temperature monitoring circuit to protect the motor
winding against thermal overload:
• 1 x PTC 130 °C temperature sensor per phase winding U, V and W, i.e. response threshold at
130°C
Description
3.4Design
1FW6 built-in torque motors
50 Operating Instructions, 09/2022, A5E52220812B AA
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