Mechanical properties
3.1 Cooling
1FW6 Built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE00-0BP9
59
General requirements placed on the cooling medium
The cooling medium must be pre-cleaned or filtered in order to prevent the cooling circuit
from becoming blocked. The formation of ice is not permitted!
Note
The maximum permissible size for particles in the cooling medium is 100
μm.
Requirements placed on the water
Water which is used as basis for the coolant must comply as a minimum with the following
requirements:
● Chloride concentration: c < 100 mg/l
● Sulfate concentration: c < 100 mg/l
● 6.5 ≤ pH value ≤ 9.5
Contact the anti-corrosion agent manufacturer relating to additional requirements!
Requirements placed on the anti-corrosion agent
The anti-corrosion agent must fulfill the following requirements:
● The basis is ethylene glycol (also called ethanediol)
● The water and anti-corrosion agent do not segregate
● The freezing point of the water used is reduced to at least -5 °C
● The anti-corrosion agent used must be compatible with the fittings and cooling system
hoses used as well as the materials of the motor cooler
Check these requirements, especially in regard to material compatibility, with the cooling unit
manufacturer and the manufacturer of the anti-corrosion agent!
● 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
Manufacturer recommendations: see appendix
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