A selector switch and two - wire pilot device cannot be used to control a large motor directly but rather must be connected to a magnetic starter. Why this is true.?

Q: 5. How are larger control transformers supplying a motor control center usually cooled?

A: Power transformer are mainly used for supplying a motor these motor generates a very huge amount of…

Q: Briefly Explain the operation of Buchholz relay.

A: Buchholz relay- The Buchholz relay is used in the transformers. the Buchholz relay is used to…

Q: All answers should be written in complete sentences. Calculations should be shown in detail, and…

A: FIND: which NEC table is used to determine the full

Q: Switching, Cords and Cables, Motors, and Related Systems 15.a. Information such as manufacturer's…

A: Motor:- Motors are used for the conversion of electrical energy into mechanical energy. On the basis…

Q: Define pilot relay

A: Pilot relay

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: 7. Do your results confirm that the speed of the DC Motor/Generator can be controlled by varying the…

A: The speed control of a DC motor/generator can be done with the mentioned following three ways :…

Q: What is the difference bewteen a grounded control system And a floating control system?

A: A normal transformer consists of a primary and a secondary winding. But, a control transformer is…

Q: What pin numbers are connected to the coil of an eleven-pin control relay?

A: The explanation is as follows.

Q: Identify and describe the basic functional elements that could be used in closed loop control for…

A: Closed-loop Control system -  A closed-loop control system, also termed a feedback control system,…

Q: In developing line or wiring disgrams,in which lines should the overload relays be place for three -…

A: On developing the line or wiring diagrams, in which lines should the overload relays be place for…

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: 3-phase, 50-horsepower induction motor

A:

Q: 8. Explain in detail the purpose of a time-delay, low-voltage release relay assembly installed in a…

A: The purpose of a time delay, low voltage release relay assembly installed in a motor control circuit…

Q: 3. Enumerate the different types of devices used in magnetic DC Controller? 4. Explain briefly…

A:

Q: 2. When multiple start stop pushbuttons are required the stop buttons are connected in and the start…

A:

Q: Explain in detail the purpose of a time-delay, low-voltage release relay assembly installed in a…

A: The time-delay, low-voltage release relay assembly installed in a motor control circuit is shown…

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

A:

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: What is the work of the Automatic transmission control system?

A:

Q: Define protective relay? Explain with appropriate diagram.

A:

Q: What safely feature does the conbination starter provide that individual motor starting assemblies…

A: The combination starter consists of an across-the-line starter and a disconnect switch. It has a…

Q: Draw the simple Motor Start/Stop Control circuit we have been working with in class. Be sure to…

A:

Q: Why is it not necessary to show the Armature and cross bar or the overload reset mechanism in a…

A: Wiring diagram shows the connections of the equipment to be connected in the power circuit.

Q: What happens when the holding coil gets the supply in the magnetic controller?

A: According to the question we have to discuss, What happens when the holding coil gets the supply in…

Q: Explain the meaning of CASCADE Control system (Serie ). a.Give a practical example of this Cascade…

A: When there are multiple measurements but only one control variable available, then the system called…

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

A: The explanation is as follows.

Q: A selector switch Andrés two- aire piloto debiese cannot be used to comtrol a larger motor directly…

A:

Q: Your Answers may be presented through Discussions, Drawings/Figures/Diagrams, Reference to NEC/PEC…

A:

Q: b) Differentiate between modern and classical control system?

A: Since both questions are different so we are supposed to answer any one.  b)  In systems described…

Q: 13. What is meant by the low or poor starting economy of a primary resistor starter?

A:

Q: Q 127. technician a says a throttle by wire system [ETC] eliminate the need for a cruise control…

A: ETC SYSTEM-   ETC stands for the Electronic throttle system.    It is an automatic technology…

Q: Brief about DC motor control using L298N module, and write a code to drive the DC motor using L298N…

A: DC motor control using L298N: It is a 15-pin motor driven IC. It is high current and high voltage IC…

Q: Consider the block diagram shown is for a closed-loop temperature control system. Where is the…

A: Given: The block diagram for a closed loop temperature controlled system is,

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: The starter must never operate for more than sixty seconds at a time and should rest for two minutes…

A: The starter must never operate for more than sixty seconds at a time and should rest for two minutes…

Q: Explain “hopscotching as an important process in troubleshooting a control system.

A: Many electrical circuit defects such as the switch or motor malfunctioning can be identified by a…

Q: list the probable causes if the armature does not release after the magnetic starter is…

A: For the control of 3-phase motors, the magnetic starter allows separation of the control circuit…

Q: What causes the overload of a starter to open and disable the power circuit?

A: The various causes by which the overload of a starter to open and disable the power circuit is as…

Q: Worn armature bearing can result in higher than normal starter cranking current draw ? True or false

A: The above statement is true.

Q: what safety feature does the combination starter provide that individual motor starting assemblies…

A: Solution- The safety feature is the primary requirement of any circuit or any device per their…

Q: 4. How do you adjust the slope of the percentage differential relay?

A: PERCENTAGE DIFFERENTIAL RELAY: The percentage differential relay is a relay that operates on the…

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: 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

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.