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| 型号： | 9339-10274 |
| 元件分类： | 功率/信号继电器 |
| 英文描述： | POWER/SIGNAL RELAY, 3PST, MOMENTARY, 0.175A (COIL), 28VDC (COIL), 4900mW (COIL), 25A (CONTACT), 28VDC (CONTACT), PANEL MOUNT |
| 文件页数： | 10/12页 |
| 文件大小： | 554K |
| 代理商： | 9339-10274 |
3. Calculation of coil temperature rise when R initial and R final are known:
Delta T = (234.5 + T1) (R2/R1 - 1)
Delta T = Temperature rise (°C)
T1 = Initial temperature (°C)
R1 = Initial resistance (Ohms)
R2 = Final resistance (Ohms)
R2 = K2R1
Temperature can also be found by making the R2/R1 ratio = the
coefficient of correction graph in Fig. 2, and then finding the corresponding temperature.
TEMPERATURE CORRECTION CHART FOR RESISTANCE
Fig. 2
EXAMPLE:
Catalog indicates coil resistance of 290 ohm at 25°C. What is the value at 125°C?
From the chart: 290 x 1.39 = 403.31 Ohms.
Date of issue: 6/00
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