www.weg.net
24 l Installation, operation and maintenance manual – Squirrel cage motor – W Line - Horizontal and vertical 11239449
4.5.1.4 Temperature and ohmic resistance of the PT100 thermoresistance
Table 4.6 shows the temperature as a function of the ohmic resistance measured across PT100 RTDs.
Table 4.6: Temperature X Resistance (Pt100)
º C 0 1 2 3 4 5 6 7 8 9
0
100.00 100.39 100.78 101.17 101.56 101.95 102.34 102.73 103.12 103.51
10 103.90 104.29 104.68 105.07 105.46 105.95 106.24 106.63 107.02 107.40
20 107.79 108.18 108.57 108.96 109.35 109.73 110.12 110.51 110.90 111.28
30 111.67 112.06 112.45 112.83 113.22 113.61 113.99 114.38 114.77 115.15
40 115.54 115.93 116.31 116.70 117.08 117.47 117.85 118.24 118.62 119.01
50 119.40 119.78 120.16 120.55 120.93 121.32 121.70 122.09 122.47 122.86
60 123.24 123.62 124.01 124.39 124.77 125.16 125.54 125.92 126.31 126.69
70 127.07 127.45 127.84 128.22 128.60 128.98 129.37 129.75 130.13 130.51
80
130.89 131.27 131.66 132.04 132.42 132.80 133.18 133.56 133.94 134.32
90 134.70 135.08 135.46 135.84 136.22 136.60 136.98 137.36 137.74 138.12
100 138.50 138.88 139.26 139.64 140.02 140.39 140.77 141.15 141.53 141.91
110 142.29 142.66 143.04 143.42 143.80 144.17 144.55 144.93 145.31 145.68
120 146.06 146.44 146.81 147.19 147.57 147.94 148.32 148.70 149.07 149.45
130
149.82 150.20 150.57 150.95 151.33 151.70 152.08 152.45 152.83 153.20
140 153.58 153.95 154.32 154.70 155.07 155.45 155.82 156.19 156.57 156.94
150 157.31 157.69 158.06 158.43 158.81 159.18 159.55 159.93 160.30 160.67
4.5.1.5 Space heater
When the motor is equipped with a space heater to
prevent internal water condensation during long periods
out of operation, it must be assured that the space heater
is energized shortly after turning the motor off, and that it
is de-energized before the motor is put into operation.
The values of the space heater supply voltage and power
are informed in the connection diagram and in the specific
plate affixed to the motor.
4.5.2 Water leak sensor
When requested by the user, the motors can be supplied
with a water leak sensor, installed internally in the lower
part of the frame. The sensor detects any water leaks from
the cooling system into the motor. This sensor must be
connected to the control panel, according to the motor
connection diagram.
NOTE
The water leak sensor (if any) is installed in
the lowest part of the motor.
4.5.3 Water temperature sensor
The temperature sensors installed at the water inlet and
outlet (if any) are used to monitor the water temperature.
The water inlet temperature is indicated on a specific plate
of the cooling system affixed to the motor frame.
Formula: - 100 = C
0.386
To Next Page
Loading...
