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Why you use cartridge fuse in control circuit of motor?
It is proper "control sense" to fuse the control circuit. It does not have to be just a cartridge fuse, in many cases it is a breaker. Depending on where the control voltage is obtained from, transformer from the incoming motor feed, separate source, or line voltage, there is always a chance that a component of the control circuit could fail, circuit protection would lessen the damage to other equipment in the control circuit. The fuse should be sized as close to the control current as possible.
What are the disadvantages of armature speed control method for a dc motor?
In armature speed control, speed can be varied only below the rated speed. Also in it voltage drops will be high.
How many watt transformer is needed for 2.5 amp motor?
Need to know the voltage of the motor and primary voltage of the transformer.
What is the solution for running three phase induction motor at voltage less than its rated voltage to drive full load?
The solution to this problem is to get the same size motor in HP at the correct voltage. This way the motor can correctly drive the connected full load without tripping the motor protection.
How do you connect a time clock to a 3 phase motor?
You'll need to control the motor with a large, three-pole relay, called a "contactor". If the motor is of significant size, you'll need a special kind of contactor called a motor starter (or motor protector). This is a current-protected contactor with current-based heaters sized appropriately for the motor load. They allow for the high starting currents typical of inductive motor loads and provide protection at lower currents as the motor runs. Contactors and motor starters will have a coil voltage that's typically 24VAC, 120VAC or 208VAC. That control voltage will be switched through the single pole, normally open points of the time clock. All electro-mechanical time clocks will be able to deal with most any control voltage. Some newer solid state time clocks may not be rated to 120VAC or 208VAC so you'll need to verify the control voltage of one when deciding on the other. A number of companies in the U.S. make contactors and motor starters: Cutler Hammer, Allen Bradley (Rockwell) and Square D are a few well known brands in the States. Other manufacturers (Siemens, et al) are more prevalent in other countries. Check with an industrial electrical supply or commercial equipment and motor supply like W.W. Grainger.
What is the fullform of mcc panel?
mcc - motor control center or motor control console. A motor control center (MCC) is an assembly of one or more enclosed sections having a common power bus and principally containing motor control units
Why speed control of DC shunt motor is necessary?
The total voltage of the batteries or DC power source connected to a shunt motor affects how first it moves. Increasing the DC voltage will make the shunt motor run faster.
What is the mcc room?
motor control center
What is the voltage that supplies a motor starter called?
In the electrical trade it is called control voltage. This voltage can be any voltage. In North America the common control voltage is 120 volts.
What is the difference between mcc and pcc?
MCC-Motor control center which consist of motor staters to control the motor. PCC-power contol center which is control the power to distribution system
What is meant when the nameplate reads DC motor?
It means that the voltage that supplies the motor has to be a direct current source.
Why you use cartridge fuse in control circuit of motor?
It is proper "control sense" to fuse the control circuit. It does not have to be just a cartridge fuse, in many cases it is a breaker. Depending on where the control voltage is obtained from, transformer from the incoming motor feed, separate source, or line voltage, there is always a chance that a component of the control circuit could fail, circuit protection would lessen the damage to other equipment in the control circuit. The fuse should be sized as close to the control current as possible.
What is wye delta motor control?
It is a method of starting a three phase motor at a lower than operating voltage. The motor is operated at that voltage for a short specific time and then the controls switch to the motors full run operating voltage.
What does the control module do on an electric scooter?
Controls the application of voltage to the motor to control speed and direction of the motor. If there is a built in charger it would also control the charging process.
Speed control of three phase induction motor by supply voltage control using AC voltage regulators?
No. Use standard utility AC, 3 PH voltage to feed a Variable Frequency Drive (VFD). The VFD is then wired to the motor. The output of the VFD varies average voltage and frequency in a semi-constant proportion to keep Volts/Hertz ratio the same to the motor. The operator can then adjust or select the desired speed from the VFD and the VFD will run the motor continuosly at that desired speed. If you were to control only voltage to the motor without adjusting frequency in proportion, the motor would burn up.
Why variable voltage and variable frequency control is used instead of variable voltage?
variable voltage control has some limitations as you decrease the voltage corresponding phase current will increase lead to increase of flux which lead to saturation of motor core and heating of motor to make flux constant and vary speed of motor v/f ratio need to be maintained constant
What is the difference between vector control and Stator Voltage control method of induction motor?
I need the answer of this question plz!!
