.How is a galvanometer be protected from excessive currents? Sketch the connections of two types of shunt
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1.How is a galvanometer be protected from excessive currents? Sketch the connections of two types of shunt.
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- Discuss reversed polarity and why is it dangerous to reverse you wire connection.QUESTION -7 In the following figure a power line to drive a Load is represented. The wires are made of copper and shaped as solid round. Under the following requirementsi. The length of each positive voltage and ground wire is 30ft.ii. The maximum allowable resistance of each power line is 0.006 Ω.iii. The maximum allowable current is 110A for each power line.Find the followinga) Using the AWG table (given in this exam sheet) find the suitable cable type with minimum size.b) Considering power supply as E=24V and current drawn by the load as I=12A, find the total voltage drop over the cables and voltage difference over the Load.What is the difference between a thermal overload and a magnetic overload? Draw the symbol for each.
- Electric Powers System for Nonelectrical Professional can you explain the operation and need for voltage regulators and tap changers12.a. An electrical device would also fall into the classification of an electric(al)A. motor.B. load.C. component.D. fitting.12.b. A short circuit describes the condition where there's contact between theA. hot wire and the neutral wire.B. grounded conductor and the grounding wire.C. hot wire and the grounding wire.D. neutral wire and the grounded conductor.What are the different maintenance that need to conduct on the GENERATOR and explain. a. Breakdown Maintenance b. Preventive Maintenance c. Condition Monitoring
- This is a question about coil winding.a)Look at the diagram in FIGURE1. Describe the path for one loop starting at 1’and ending at 1.b)What is the pole pitch of FIGURE 1?c)A 4 pole lap wound armature has 16 coils each with a resistance of 0.1 ohms.Calculate the resistance of the armature7. A 4-pole shunt generator with lap connected armature has field and armature resistances of 50 ohms and 0.1 ohm respectively. It supplies power to sixty 100 V, 40 W lamps. Calculate the armature current and generated emf. Allow a contact drop of 1 V per brush.Which of the following is/are a part a generator's electric circuit?a) the commutator b) the brushes c) the armature windings d) all of the above
