Schweitzer Engineering Laboratories SEL-700GT - Table 4.46 RTD Resistance Versus Temperature

4.152
SEL-700G Relay Instruction Manual Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
temperature trip if one or two of the healthy winding RTDs indicate a
temperature greater than their RTD trip temperature settings. Two winding
RTDs must indicate excessive temperature when the winding trip voting
setting equals Y. Only one excessive temperature indication is necessary if
winding trip voting is not enabled. Bearing trip voting works similarly.
The warning and trip temperature settings for bearing, ambient, and other
RTD types function similarly, except that trip voting is not available for
ambient and other RTDs.
To disable any of the temperature warning or trip functions, set the appropriate
temperature setting to OFF.
Only healthy RTDs can contribute temperatures to the warning and trip
functions. The relay includes specific logic to indicate if RTD leads are
shorted or open. Table 4.46 lists the RTD resistance versus temperature for the
four supported RTD types.
Table 4.46 RTD Resistance Versus Temperature (Sheet 1 of 2)
Tem p
(°F)
Te m p
(°C)
100
Platinum
120
Nickel
100
Nickel
10
Copper
–58 –50.00 80.31 86.17 74.30 7.10
–40 –40.00 84.27 92.76 79.10 7.49
–22 –30.00 88.22 99.41 84.20 7.88
–4 –20.00 92.16 106.15 89.30 8.26
14 –10.00 96.09 113.00 94.60 8.65
32 0.00 100.00 120.00 100.00 9.04
50 10.00 103.90 127.17 105.60 9.42
68 20.00 107.79 134.52 111.20 9.81
86 30.00 111.67 142.06 117.10 10.19
104 40.00 115.54 149.79 123.00 10.58
122 50.00 119.39 157.74 129.10 10.97
140 60.00 123.24 165.90 135.30 11.35
158 70.00 127.07 174.25 141.70 11.74
176 80.00 130.89 182.84 148.30 12.12
194 90.00 134.70 191.64 154.90 12.51
212 100.00 138.50 200.64 161.80 12.90
230 110.00 142.29 209.85 168.80 13.28
248 120.00 146.06 219.29 176.00 13.67
266 130.00 149.83 228.96 183.30 14.06
284 140.00 153.58 238.85 190.90 14.44
302 150.00 157.32 248.95 198.70 14.83
320 160.00 161.05 259.30 206.60 15.22
338 170.00 164.77 269.91 214.80 15.61
356 180.00 168.47 280.77 223.20 16.00
374 190.00 172.17 291.96 231.80 16.39
392 200.00 175.85 303.46 240.70 16.78
410 210.00 179.15 315.31 249.80 17.17
428 220.00 183.17 327.54 259.20 17.56