Problem solving 1-5 2. A single phase load takes 75 kW at 75% p.f. lagging from a 240 V, 60 Hz supply. If the supply is

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Problem Solving 1 5 2 A Single Phase Load Takes 75 Kw At 75 P F Lagging From A 240 V 60 Hz Supply If The Supply Is 1 (44.69 KiB) Viewed 19 times

Problem solving 1-5 2. A single phase load takes 75 kW at 75% p.f. lagging from a 240 V, 60 Hz supply. If the supply is made 50 Hz, with the voltage twice, what will be the kW load at this rating? Give also the complex expression of the impedance. 3. A non-inductive resistance of 15 ohms in series with a condenser takes 5 A from 220-V ,60 Hz mains. What current will this circuit take from 220-V, 25 Hz supply? 4. An industrial coil has a resistance of 64 ohms and a reactance of 48 ohms and rated 440 V at 60 Hz. A factory will connect the coil to a 440 V, 50 Hz supply. How much percentage over current will the coil suffer? 5. A coil (RL) is connected in series with a capacitor across a 220 V, 60 Hz AC supply. The circuit is designed such that the voltage across the coil is half of that capacitor. If the circuit operates at 0.80 leading power factor, determine the magnitude of the voltage across the coil and of that capacitor. 6. Show that Iave = 0.6366 Im. 6. Derivation GIVE THE SOLUTION Answer Key: 2.P = 346.45 kW 3.12 = 2.19 A 4.% overcurrent = 6 % 5. EL= 254 cis 46.15 V; Ec= 127 V