Why do we use pushbutton type switches for controlling the motor circuit?

Q: What is the application of Automatic Change over switch?

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Q: L2 M M 7. Which statement is true for the process-control relay ladder diagram shown in the figure?…

A: Asked to give correct option from the given by referring the circuit

Q: why is the power not interrupted when the motor makes the transition from start to run?

A: 3-phase motors are commonly self-starting while the dc motors are not self-starting. To run the…

Q: Why is the reason of connecting in series a normally open contact of an overload relay and an…

A: Overload is the condition when the motor start drawing excessive current in compare to its rated…

Q: what are designed to protect the motor from an overload condition

A: Overload motor: A motor is connected with excessive load, draws more current, and produces…

Q: Explain (i) control relay and (ii) Thermal overload relay?

A: Control relay A control relay is an electromagnetic device that is most commonly used in protection…

Q: If a timing relay fails to cut in the run starter, what percentage of the full load current can the…

A: Starter is used to protect and control the very high starting current absorb by the motor during the…

Q: What are typical uses for control relays

A: Relays are sensing devices in nature. Control relays enable a low current circuit to control a high…

Q: 4. What is the difference between the reverse power relay and the direction relay?

A: The difference between reverse power relay and the directional relay is

Q: In developing line over wiring diagrams in which lines should the overload relays be placed for…

A: The line diagram for three-phase motor starters is shown below:

Q: Question 28 An industrial selector switch would most often have: O double break contacts. O more…

A:

Q: Explain all the types of distance protection relays?

A:

Q: Question 28 An industrial selector switch would most often have: O double break contacts. O more…

A:

Q: what must be done to prevent excessive motor current?

A: To prevent the excessive motor current various protection schemes are applied for different motor.…

Q: Where is the speed control for a range hood fan located

A:

Q: How is a relay manually operated

A: Relay is an electromagnetic device that can be used to on or off the circuit by using an electric…

Q: Advance Motor Control 1. Why are contacts often disconnected in series when controlling small…

A: consider the given question;

Q: What is the function of the double contact pushbutton in a Start-Stop-Jog motor control circuit?

A: Double contact pushbutton is used in the Start-Stop-Jog motor control circuit, its functions are as…

Q: If both the forward and reverse contactors for a motor engage at the same time, what will happen to…

A: In this question we need to discuss what happen when both the forward and reverse contactors for a…

Q: D Question 28 An industrial selector switch would most often have: double break contacts. O more…

A:

Q: Define protective relay? Explain with appropriate diagram.

A:

Q: Does the Indoor Fan Motor stop when the control fuses faulty?

A: In this question we will see about control fuse importance...

Q: What does affect to the system if the control fuse faulty (blown)?

A: The explanation is as follows.

Q: 4. Referring to Figure 12-14, assume that the normally open 2M contact located between wire numbers…

A: What would happen if normally open contact 2M between 23 and 29 is welded closed and  a) The number…

Q: function of three point starter?

A: 3 Point Starter:- The primary purpose of a 3 Point Starter is to start and maintain the speed of a…

Q: what is protective relays?

A: A protective relay is a piece of switchgear that recognises a failure and starts the circuit…

Q: Why do we connect stop pushbuttons in series in a two - station motor control?

A: Control circuit of two station motor control is as,

Q: WHAT ARE THE DIFFERENT TYPE OF SWITCHES, RELAY AND CONTACTORS?

A: Protection devices are used in a circuit to protect the equipment and to provide safety for humans…

Q: Develop a relay ladder diagram for the sequence control of two motor starters using a single…

A: To develop relay ladder using nema symbols

Q: Why do you think some motor control circuit utilizes single voltage sources for control and power…

A: Types of Motor control based on power supply  Three power supply  Two wire supply  Types of…

Q: How does a Direct On Line Motor Starter work?

A: Types of starting methods of 3-phase induction motor are, Direct On-line Starter Star-Delta Starter…

Q: Assume a motor is running. What happens when the stop button is pressed and then the start button is…

A: Consider that a motor is in a running position. Find what will happen when the stop button is…

Q: Large motor should be connected directly across the line on start up

A: To explain that whether large motor should be connected directly across the line on start up.

Q: For a start-stop push button control circuit that has been reconnected so that the start button is…

A:

Q: How is the protective relay work?

A:

Q: When power is applied to an off delay relay, what happens to the contacts connected to that

A: The explanation is as follows.

Q: Assume the motor is running. What happens when the stop button is pressed and then the start button…

A: While the motor is running and if the stop and start button are pressed alternatively. Their effect…

Q: what advantage is there in using combination starters?

A: The advantages of using combination starters are given below:   The starter can be operated in the…

Q: When selecting motor overload protection devices from where is the full load ampere rating taken?

A: This question is from "Electrical Machine". Under which we are going to study about the overload…

Q: One reason for the use of a reduced voltage starter would be to reduce the high starting current…

A: There are many ways by which we can reduce the high starting currents in motor

Q: Question 28 An industrial selector switch would most often have: O double break contacts. O more…

A: The solution is given below

Q: A selector switch and two - wire pilot device cannot be used to control a large motor directly but…

A: Selector switch and two-wire pilot devices are only used to control lower rating motors.