Dual- voltage rated pump motors are rated!?

Q: (i) Using circuit diagram and the current-time characteristics, explain the motor overload…

A: NOTE- As per the rules we can answer only 3 sub-parts, please post the remaining sub-parts as the…

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: 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: 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: The armature and field circuits of a 230-volt shunt motor have resistance of 0.31 and 115 ohms…

A: For  shunt motor,   Counter emf = terminal voltage- voltage drop in armature resistance.  Armature…

Q: The rotor of a certain 20Hp,six-pole, 60HZ induction motor has

A: NOTE- “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: 30. Excluding slip, at what speed (r/min) with a four-pole, 60 Hz, 240 Volt motor runs?

A:

Q: What is the full-load current of a 230-volt, 3-phase, 125-horsepower synchronous  motor when it is…

A: It is given that: V=230 VP=125 hpcosϕ=80 %=0.08

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: Which one of the following types of motors is not normally reversible? A. PM motor B. Universal…

A: Universal notor is generally an dc motor on which the direction of rotation can be reversed by…

Q: When calculating motors, why do we use the NEC table amperage instead of the nameplate amperage?

A: In the table of National electrical code (NEC) full load motor current higher to the motor's name…

Q: Draw the circuit diagram for the squirrel cage motor and name all the components too.

A: The circuit diagram for the squirrel cage induction motor:

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: the blocked rotor test is performed on a wound rotor motor and if the rotor  winding is kept open,…

A: Always remember , the current flows through a close path. When the rotor winding are open i.e., no…

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: When can full-voltage starting be used?

A:

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

A:

Q: Explain with mathematical reasons why direct current motors cannot be operated from a constant…

A: The voltage of the dc motor is as follows:   V=I.R+Ldidt+E   =I.R+EE=ke.ωso, V=I.R+ke.ωke=Electrical…

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: Why starters are used for DC motors. * Your answer

A: Starter is a device which is used to start DC motors.

Q: 6. What is the full-load current of a 600-volt, 3-phase, 50-horsepower induction motor?

A:

Q: Q3/ Why is a starting resistor used in de motor circuits?

A: The back e.m.f of the DC motor is Eb = ΦZN60XPA     Where Φ is flux/pole                 Z is total…

Q: A 120 volts shunt motor draws a current of 75 Amperes at rated load. The armature and shunt field…

A:

Q: you are working as a plant electrician. you are told that a large DC motor was returned from the…

A: This case comes in differential compound motor. In this type of motor the current flows through the…

Q: a 220-volt, 20-horsepower compound motor (long shunt) has an armature resistance of 0.25 ohm, series…

A:

Q: Where can you find the low/high voltage connection diagram of a motor?

A: As per the NEMA, the low/high voltage connection of the motor can be classified by the number of…

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: What is starter ? Function of starter?

A: A motor starters main job is to start and stop the motor to which it is attached. These…

Q: What type of starter is used to start the three phase Squirrel Cage induction motor? and explain the…

A:

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: If the speed of the driving motor falls due to loading what will be the effects?

A: A motor is a device which convert electrical energy into mechanical energy.The speed (RPM)of a motor…

Q: Can the Manual Motor Starter be used alone or only with a contactor?

A: Manual motor starter is used to switch motors ON/OFF manually and mainly provide electromechanical…

Q: Differentiate the sizes of manual starters

A:

Q: Identify the DC motor that can be used in Electric Traction

A: DC MOTORMotor work on side of excitation which is that the side of excitation electrical when…

Q: |The nameplate rating of a motor is 150 hp, 600 volts, 205 A, 1700 rpm. The resistance of the shunt…

A:

Q: Explain servo motor with its block diagram

A: A Servo motor is a motor that allows control likes control in angular position, acceleration, and…

Q: 5. Which one of the following types of motors is not normally reversible? A. PM motor B. Brushless…

A: Motor:  A mechanical device that transforms electrical energy into mechanical energy is known as an…

Q: 25. Which of the following is/are a general method of starting squirrel-cage motors? a) full voltage…

A: Squirrel cage induction motor: Function of this motor is based on Electromagnetism. And it is…

Q: which figure represents the response of the servo motor according the block diagram?

A: In this question , we will find response of servo motor..

Q: QUESTION 6 A 90KW, 6 pole synchronous motor is designed to operate from a 400 volt,60 hertz supply…

A: This is synchronous motor so it will run at synchronous speed which can be calculated as per below…

Q: 2. Which NEC table is used to determine the full-load current of a torque motor?

A: In this question we will find Which NEC table is used to determine the full-load current of a torque…

Q: The starting current of a 15-hp, 440 volt, and three-phase induction motor is 32 amperes when rated…

A: Three phase induction motor is convert the electrical input to mechanical output. Three phase…

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.