Siemens SIMOTICS HT Series, Инструкция по эксплуатации и установке

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inlet temperature and/or an ambient temperature > +40°C, then you must reduce the torque.
Note the derating factors shown in the table below.
Table 4-1 Derating factors
Coolant inlet temperature up to 25 °C 30 °C 35 °C 40 °C 45 °C
Ambient temperature up to 40 °C 45 °C 50 °C 55 °C 60 °C
Derating factor k
T
1.0 0.97 0.95 0.92 0.89
Cooling volumetric flow and water pressure
Table 4-2 Coolant flow rate and maximum permissible water pressure
Type Cooling volumetric flow
l/min
Max. permissible water
pressure
1
MPa
Thread sizes for water
connections
1FW440. 30 0.5 G¾
1FW445. 50 0.5 G1
1FW4503 / 1FW4505 65 0.5 G1½
1FW4507 / 1FW4508 80 0.5 G1½
1
A maximum pressure drop of approximately 0.1 MPa occurs in the water jacket.
Cooling water quality
The cooling water must meet the following prerequisites:
● Chemically neutral reaction
● Water cleaned by solids
● Max. particle size of particles carried: ≦ 0.1 mm
● No salt water
NOTICE
Damage due to sea water
The cooling system is made of St37 steel. This material is not resistant to sea water.
● Do not use seawater to cool the motor.
Table 4-3 Chemical requirements of the cooling water quality
Contents and chemical composition Value
pH value 6.0 to 8.0
Total hardness < 170 ppm
Chloride < 40 ppm
Sulphate < 50 ppm
Nitrate < 10 ppm
Preparations for use
4.4 Cooling water inlet temperature (water-cooled motor)
SIMOTICS HT Series HT-direct 1FW4...1......A
Operating Instructions 11/2018
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