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Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
459
3.3.13
Checking the Temperature Measurement via RTD-Box
After the termination of the RS485 port and the setting of the bus address have been verified according to
Section 3.2, the measured temperature values and thresholds can be checked.
If temperature sensors are used with 2-phase connection you must first determine the line resistance for the
temperature detector being short-circuited. Select mode 6 at the RTD-Box and enter the resistance value you
have determined for the corresponding sensor (range: 0 to 50.6
Ω
).
When using the preset 3-phase connection for the temperature detectors no further entry must be made.
For checking the measured temperature values, the temperature detectors are replaced by adjustable resistors
(e.g. precision resistance decade) and the correct assignment of the resistance value and the displayed tem-
perature for 2 or 3 temperature values from the following table are verified.
Table 3-33
Assignment of the resistance value and the temperature of the sensors
Temperature thresholds that are configured in the protection device can be checked by slowly approaching the
resistance value.
Temperature in °C
Temperature in °F
Ni 100 DIN 43760
Ni 120 DIN 34760
Pt 100 IEC 60751
–50
–58
74.255 89.106 80.3062819
–40
–40
79.1311726 94.9574071 84.270652
–30
–22
84.1457706 100.974925 88.2216568
–20
–4
89.2964487 107.155738 92.1598984
–10
14
94.581528 113.497834
96.085879
0
32
100
120
100
10
50
105.551528 126.661834 103.902525
20
68
111.236449 133.483738 107.7935
30
86
117.055771 140.466925 111.672925
40
104
123.011173 147.613407 115.5408
50
122
129.105 154.926 119.397125
60
140
135.340259 162.408311 123.2419
70
158
141.720613 170.064735 127.075125
80
176
148.250369 177.900442 130.8968
90
194
154.934473 185.921368 134.706925
100
212
161.7785 194.1342 138.5055
110
230
168.788637 202.546364 142.292525
120
248
175.971673 211.166007 146.068
130
266
183.334982 220.001979 149.831925
140
284
190.88651 229.063812
153.5843
150
302
198.63475 238.3617 157.325125
160
320
206.58873 247.906476
161.0544
170
338
214.757989 257.709587 164.772125
180
356
223.152552 267.783063 168.4783
190
374
231.782912 278.139495 172.172925
200
392
240.66 288.792
175.856
210
410
249.79516 299.754192
179.527525
220
428
259.200121 311.040145 183.1875
230
446
268.886968 322.664362 186.835925
240
464
278.868111 334.641733 190.4728
250
482
289.15625 346.9875 194.098125
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