e Tools |19]/35 :@ ? ? |.120%-? |???? 2 ELE26U1/TU1/3720T8 ?? a ? ? | ASSIGNMENT

Question

e Tools |19]/35 :@ ? ? |.120%-? |???? 2 ELE26U1/TU1/3720T8 ?? a ? ? | ASSIGNMENT 3 Only for self-evaluation QUESTION 1 A series RL-circuit consist of a 216? resistor and a 74mH inductor. The radial velocity in the circuit is 377rad/s and the supply voltage is represented by the equation: e() -220+ 150 stnot + 120 sin (ot+80sin (Sut + ) volt 1.1 Determine an equation for the instantaneous current in the circuit. 1.2 Calculate the active power dissipated in the resistor 1.3 Calculate the over-all power factor of the circuit. 7.5 (10) [15] QUESTION 2: OType here to search

Explanation / Answer

Low power factor has many disadvantages such as

1 capital cost increases

2 running cost is increased

3 efficiency decreases

4 large voltage drop

5 poor voltage regulation

6 high copper losses

The low power is improved by using static capacitors or by synchronous motors.

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