FIGURE 6.34 Air-conditioning system with lockout relay Legend Сontactor 240 V/10/60 Hz COMP Compressor CT Compressor intemal thermostat HR Heating relay Indoor fan relay Indoor fan motor Lockout relay COMP IFR IFM LA т Thermostat Heating Source HR IFM IFR 24 volts RW HR T Y HPS LPS LR CT G LR IFR

Q: If we have a 50G ground relay connected to a flux summation CT of 50:5. If we measure the phase…

A: In this question We need to determine the current in the CT.  CT is ground type relay.  All phases…

Q: 30. A) Why is there a small emf generated in a series generator at no load? a) the residual magnetic…

A: Solve for both

Q: Discuss the following terms               (i) Double Revolving Theory               (ii) Lap…

A: As per our policy i have attempted first three sub-parts. (i) The double-revolving field theory of a…

Q: 4. Generator is said to be a. series field aids the shunt field c. the commutation device is used…

A: A compound  generator has two field windings I.e  series field winding and shunt field winding .…

Q: Q2/ Design a 4-pole wave winding for an armature with 21 slots. Assume single turn coils and two…

A: Step 1:  Designing a 4-Pole Wave Winding for a 21-Slot Armature The steps involved in designing a…

Q: The core loss is the combined hysteresis and eddy current losses in the armature and field iron True…

A: There are two type of losses present in the machine copper loss core loss

Q: III. Derive an expression for the rotor copper loss in terms of slip and input to the rotor?

A:

Q: Elimination of armature reaction requires a series field winding O True False

A: The elimination of armature reaction requires compensating winding.

Q: A4-pole, 50kW, 250 V, wave-wound shunt generator has 400 amature conductors. Brushes are given a Iad…

A:

Q: A DC machine with 2 poles, wave * winded (retrogressive) (two layers) with 18 slots, the values of…

A: No of pole P= 2 No of slot S= 18 Pole pitch?  Commutator segment?

Q: explain the purpose of the generator excitation system

A: A generator excitation system is a control system in an electric generator that regulates the amount…

Q: Explain the improvement of transient stability by using turbine fast valving method.

A: Explain the improvement of transient stability by using turbine fast valving method.

Q: QUA) Fill in the blanks: 1. Laminations of core are generally made of..... d. In case of the…

A: As per the policy I have attended first three sub parts of the first question 1) Lamination is…

Q: Describe the purpose of the engine pickup coil and how it relates to Faraday’s law.

A: Engine pickup coil is generally used in the distributor which is used in vehicles. This device is…

Q: Shunt generator will build up its voltage when: Olts field resistance higher than critical value.…

A:

Q: The preferred method for applying the field excitation voltage uses a field relay which operates on…

A: Field Excitation Voltage:- The quantity of electric energy (D.C.) fed into the field winding of an…

Q: Q6. A 4-pole wave-wound armature rotating at 400 rpm is required to generate 300 V. The effective…

A: EMF equation of DC generator is given by Eg=∅×N×Z60×pA where  ∅ is the flux per pole.              Z…

Q: What effect does increasing rotor circuit resistance have on the breakdown torque and on slip at…

A: According to the maximum breakdown torque:

Q: An 8-pole, lap-wound armature has 1200 conductors and a flux per pole of 0.03Wb. Determine the…

A: It is given that:- P=8 Z=1200  ϕ=0.03 Wb N= 500 rev/min E(emf) = ?

Q: 38. A) Armature reaction in a DC generator can be compensated for by inserting__________ between the…

A: In this we need to tell the correct option for the given blank space.

Q: Explain the operation of three phase induction machine. (Not too long). Define slip.

A: A three phase induction motor has a stator and a rotor. The stator carries a 3-phase winding called…

Q: 6.8 in which mode of operation of a dc machine does the interpole have the polarity of the main pole…

A: Need to find in which mode of operation of DC machine does the Interpole have the polarity of the…

Q: A 6-pole lap-connected DC generator has 480 conductors and armature circuit resistance is 0.06 ohm.…

A: Given- 6-pole lap connected DC generator, 480 conductors, Armature circuit resistance=0.06 ohm, To…

Q: Explain the concept of motherboard power phases and their impact on system stability and…

A: We need to discuss motherboard power delivery systems, including voltage regulators and phases. We…

Q: Create a circuit diagram for the given armature: Winding 1: 4 pole, 11 slots, 11 commutator…

A: We need to design a double layer, progressive, simplex wave winding for a DC machine with the…

Q: Outline with the aid of a suitable diagram the necessary power conversion stages required to…

A: Question in part b is independent to that of part c and d. We are authorized to answer one question…

Q: hat are the differences in terms of construction and working principle between shaded pole induction…

A: The working guideline and development of Capacitor turn over inductor engines and capacitor start…

Q: Describe the operation of a phase shift method

A: Intoduction - Phase shift method of SSB generation - The phase shift technique used in SSB producing…

Q: What are the effects of zero sequence current on the excitation field windings?

A: The zero sequence currents produces an electric field that will oscillates but does not rotate…

Q: What are the two advantages of an induction tool over a resistivity one?

A: Electrical logs are one of the most significant instruments a petrophysicist can have. This is due…

Q: A long shunt compound generator delivers a load current of 50A at 430V and has series, armature and…

A: Given: A long shunt compound generator Load current, I=50 A Terminal voltage, V=430 V Series…

HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.