Overload protection for motors is achieved by connecting _________. Explain how possible.

Q: In plugging type of braking system of DC motor, the current in the series and shunt fields must not…

A: Plugging is called as reverse current braking. During this the voltage becomes double than the…

Q: What is grading of a relay? Explain the time-current grading of an over current relay

A: The principle of setting the operation time of the relay in such a manner that the relay closest to…

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Q: 6. How will the load current affect the speed except its effected on Ia Ra drop?

A: A self-excited DC shunt motor, also known as a shunt wound DC motor, is a form of self-excited DC…

Q: Referring to Figure 4.5, determine the operating time for a relay with a 10 A pickup, time dial…

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Q: "Modern complex systems are more pronounced with closed loop control system".Justify the statement .

A: Control systems: A control system is a collection of equipment that controls, orders, directs, or…

Q: Generator 1 is committed to the bus bar. Specification says that it has to be in service for 120…

A: Choose the correct option Generator 1 is committed to the bus bar. Specification says that it has to…

Q: 3- explain the regenerative braking?

A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…

Q: Why is it not a good idea to use circuit protection devices to protect large motors from overload…

A: According to the question we have to discuss why it is not good idea to use circuit protection…

Q: a- Explain clearly the basic principle of biased differential relay for internal fault and External…

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Q: Question-4: A 3-phase, Y-connected, 50 Hz, 8-pole, 380 V, 200 kVA salient pole synchronous machine…

A: Given,, 3-phase, Y-connected, 200KVA f=50 Hz P=8 VL=380V Direct axis synchronous reactance, Xd=1 ohm…

Q: What is meant by induction heating of metal raceways and how can you prevent it?

A: The induction heating of metal raceways is as follows: - Induction heating is the way toward warming…

Q: For what purpose was the asynchronous motor idle test performed? Please explain.

A: Need to find For what purpose was the asynchronous motor idle test performed?

Q: In short, answer the next question: What is the meaning of torque in synchronous-watt?

A: In this we will define synchronous watt torque...

Q: Describe the effect of the step size on the slope overload phenomena?

A: Slope overload phenomenon happens when the slope of the input signal is greater than the delta…

Q: For the Starting Up the Power Station Simulator Why are certain operations blocked by isolators

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Q: What motor classification are generally found in use in low power requirement of domestic appliances…

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Q: 1) The Bus Interface Unit (BIU) functions?

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Q: Explain what are the values ​​to be taken into account in the Y / ∆ starting asynchronous motor…

A: Following values must be taken in account in star delta starting of asynchronous motor Voltage- it…

Q: "In plugging type of braking system of DC motor, the current in the series and shunt fields must not…

A: when motor is running in one direction, when we want to stop the motor we apply braking tachniques.…

Q: What is meant by generator black-start capability, why is it needed, and what types of generators…

A: When a station is allowed to generate their own power for enabling it to restart after the fault in…

Q: operating principle of single quantity electromagnetic attraction type relay and  show how this…

A: Introduction: Electromagnetic attraction type relay: An electromagnet is energized by a coil in…

Q: 2. Explain the effect of increasing the armature voltage on the behavior of the series wound machine…

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Q: Identify the reverse power flow relay, from the given symbol, Ob. d. く

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Q: Inductive reactance, resistance, and impedance are always present in circuit serving motors. Which…

A: In among all of them, the conductor size is determined by the resistor in the circuit. Since, the…

Q: Explain the Bus Bar protection using the Bus mechanism.

A: The bus zone fault occurs because of various reasons likes failure of support insulators, failure of…

Q: 1- List the advantages of using damper bars in synchronous machines?

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Name the three drive configurations that a gear set can transfer torque?

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Q: For what purpose is the short circuit test performed in asynchronous motor? Please explain.

A: Need to explain about short circuit test in asynchronous motor

Q: . What are the factors that affect the slope overload phenomena?

A: In delta modulation, the slope overload phenomena arise. The analog data are sampled at a rate…

Q: what should be the transition time from Star connection to Triangle connection, explain the change…

A: The star to delta starters is used commonly for the machines having high inertial mass such as…

Q: H.W 1- List the advantages of using damper bars in synchronous machines? 2- Why synchronous…

A: In this question we will write advantages of damping bars in synch machines... Note:- due to…

Q: Н.W 1- List the advantages of using damper bars in synchronous machines?

A: Damper bars in synchronous machine- Damper bars are of low resistance winding embedded in the pole…

Q: Operating time of a back-up protection relay is greater than the primary protection relay True False

A: The primary protection relay is fast. It is used for some applications of selective clearing of…

Q: what is  protective relaying? what is Time & Setting Multiplier ?

A: What is  protective relaying? A protection relays is a switching equipment which detect faults and…

Q: Give detailed information about the directional overcurrent protection relay by explaining the…

A: Directional over - current relay depends upon the principle of an actuation of relay, when fault…

Q: what is the difference between plug setting and pick up value of overcurrent relays?

A: Overcurrent (OC) relay: The overcurrent (OC) relay is described as just a relay that only activates…

Q: in A-Starting Up the Power Station Simulator What are the possible consequences of failure of the…

A: There are various consequences of failure of the entire DC supply system in the power station which…

Q: Question 11 Operating time of a primary protection relay is greater than the back-up protection…

A: Protective relay: A relay is an automated device that detects an improper electrical circuit state…

Q: Differential compound motors are elevators preferred to use for True False

A: Answer is FALSE.

Q: how to simulate Prime mover and Brake operation using LVSIM Simulator? please make a detailed…

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Q: The factor that enables the synchronous motor to operate at different electrical load…

A: P=EVX sinδwhere, δ- Power angle

Q: Question 1: Why is the voltage decresed at no-load operation? What is that voltage called?

A: According to guidelines we need to solve only the first question.  According to the question we have…

Q: How much change in the energy of wind will take place if wind velocity becomes 5 times ? Change in…

A: Q.1) It is given that the change in the wind velocity is 5 times.

Q: Which type of VSD is suitable for regenerative braking?

A: For practical Applications, it can be assumed that 15% to 20% of energy dissipated during the…