Question 3) A 200 km Three-Phase 50 Hz transposed transmission line is composed of one ACSR, 1,431,000 cmil, 47/7 Bobolink conductors as shown in Figure 3 (a).The Three-Phases have flat horizontal spacing of 11 meters as shown in the Figure. The conductors have a diameter of 3.625 cm and a GMR of 1.439 cm. The Line is going to be replaced with a three conductor bundle of ACSR, 477,000 cmil, 26/7 Hawk conductors. The conductors have a diameter of 2.1793 cm and a GMR of 0.8839 cm. The new line will have an increased horisontal phese spacing of 14 meters as it is going to be operated at higher Voltage rating. The new line is shown in Figure 3 (b). The spacing between the bundles in Figure 3 (b) is 45 cm. Determine, a) The inductance for each case and the percentage change in inductance b) The inductive reactance for each line and the percentage change. c) *Comment on your results. b 11 m 11 m Figure 3 (a) a b 14 m 14 m

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Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors.  The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.