How can you safeguard your machine against sudden voltage changes?
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How can you safeguard your machine against sudden voltage changes?
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- What is a dynamometer? How are dynamometers classified? Describe and differentiate hydraulic and eddy current dynamometer.Can you protect your machine against power outages?5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10 A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a) spring controlled and (b) gravity controlled? [Ans. (a) 22.5°, (b) 14.5°]
- electrical machines Explain how the experiment is done by drawing the connection diagram of the alternator idle test.Explain how a direct online (DOL) magnetic starter works with diagrams and picturesIf field current is not supplied internally by the armature, then the machine is said to be generator. O Shunt O Self excited O Compound O separately excited
- SHOW YOUR COMPLETE SOLUTION, ANSWER MUST BE IN 2 DECIMAL PLACES. SHOW WHAT IS GIVEN AND WHAT IS THE UNKNOWN. A shunt generator delivers 450A at 230V and the armature resistance is 0.03 ohms. Calculate the shunt field resistance if the generated emf is measured at 243.6V1. What is a cold solder in electronics?2. What will happen if there is a cold solder? 3. What is a heat sink? What is its importance?a) How laminated core of electrical machines reduces the iron losses?b) How can you control the voltage of dc generator during operation?c) Why parallel paths are used in electrical dc machines?