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
29
Summary of Contents for SIMOTICS HT Series
Page 2: ...13 11 2018 16 25 V5 00 ...
Page 10: ...Table of contents SIMOTICS HT Series HT direct 1FW4 1 A 10 Operating Instructions 11 2018 ...
Page 26: ...Description SIMOTICS HT Series HT direct 1FW4 1 A 26 Operating Instructions 11 2018 ...
Page 118: ...Service and Support SIMOTICS HT Series HT direct 1FW4 1 A 118 Operating Instructions 11 2018 ...
Page 122: ...Quality documents SIMOTICS HT Series HT direct 1FW4 1 A 122 Operating Instructions 11 2018 ...
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