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Motor run delta connection because in delta connection it is less ampere needed and it sometimes it change the wye connection because of the available suply
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What is a forward-reverse star delta?
A forward reverse star delta is a two in one motor starter where a motor first runs on star connection and then changed to delta connection after a time which has been set. The motor direction can be changed, whether forward or reverse
How star delta helping motor from overheat?
star delta motors start as a Y for 3 phase so the windings that normally see 480 volts see 277V a relay switches to delta then it runs as a normal delta motor the reduces the starting current by about 60% for 3 phase
The motor starts in star but does not run in delta?
Whenever you start a big heavy electric motor, you need to start it slowly to prevent the rotor overheating and drawing an enormous current or to prevent damage to the load it is driving. When the windings of a 3-phase motor are connected in STAR the current is reduced by a factor of (one over root three) times (the normal running current that is taken when it is connected in DELTA.)Once the motor picks up speed, the connection is changed to DELTA so that the motor runs at full speed and torque from then on. It's a bit like using the gears of an automobile.For more information, see the answers to the Related Questions shown below.
Why does my star delta motor run at very high amps in delta and eventually trips on overload after changing the overload protection device.It should normally run at 25amp in delta but runs at 170 amps?
THE FIRST THING IS TAKE THE READING OFF LOAD AND SEE IF THEY ARE BALANCED. HAS THE MOTOR BEEN RECENTLY REWOUND? GET A MOTOR REPAIR COMPANY TO LOOK AT THE MOTOR AND SEE IF IT HAS BEEN WOUND CORRECTLY. IF THE STAR-DELTA WORKS CORRECTLY IT SHOULD START IN STAR FOR ABOUT FIVE TO TEN SECONDS AND GO INTO DELTA THIS IS DEPENDANT ON THE STARTING CURRENT THE MANUFACTURE OF THE SWITCH AND THE APPLICATION. CHECK ALL THREE PHASES ARE BALANCED AND IF THEY ARE THE MOTOR WINDINGS MAY NOT BE CORRECTLY WOUND. SOME HAVE STAR CONNECTIONS BUILT IN.LOOKING AT THE AMPERAGE THE LOAD REQUIREMENT IS ONLY A FRACTION OF WHAT YOU ARE GETTING SO IT LEAVES ONLY TWO THINGS I......MOTOR FAULT 2.....WHAT EVER THE MOTOR IS DRIVING IS PUTTING A MASSIVE PRESSURE ON THE MOTOR CAUSING IT TO OVERLOAD.
Why one phase shows 0 Amps while a delta connected 3 phase induction motor runs?
Cause 2 phase is applied to the motor and another phase is disconnected ... in this condition ur motor cannot run longer ,it will trip on over current or burn ur motor winding .
What is a forward-reverse star delta?
A forward reverse star delta is a two in one motor starter where a motor first runs on star connection and then changed to delta connection after a time which has been set. The motor direction can be changed, whether forward or reverse
What is the difference of a star or delta connection on motor terminals?
230/400 V These motors can be connected in star to a mains of 400 V between the phases (see figure 1). figure 1 Star connection 400/695 V These motors should be connected in delta to a mains of 400 V between the phases (see figure 2).
How star delta helping motor from overheat?
star delta motors start as a Y for 3 phase so the windings that normally see 480 volts see 277V a relay switches to delta then it runs as a normal delta motor the reduces the starting current by about 60% for 3 phase
The motor starts in star but does not run in delta?
Whenever you start a big heavy electric motor, you need to start it slowly to prevent the rotor overheating and drawing an enormous current or to prevent damage to the load it is driving. When the windings of a 3-phase motor are connected in STAR the current is reduced by a factor of (one over root three) times (the normal running current that is taken when it is connected in DELTA.)Once the motor picks up speed, the connection is changed to DELTA so that the motor runs at full speed and torque from then on. It's a bit like using the gears of an automobile.For more information, see the answers to the Related Questions shown below.
Why is a star-delta starter used?
A "star-delta" starter- also known as a "Y-delta" or "wye-delta" starter - is used to reduce the voltage on the motor windings to only 1/.'/'3 [one divided by root 3] times the incoming line voltage, to help reduce mechanical stress and in-rush current at start-up.More detailWhenever you start a big heavy electric motor, you need to start it slowly to prevent the rotor overheating and drawing an enormous current. When the windings of a 3-phase motor are connected in STAR the voltage is reduced to a fraction equal to one over root three (1 / 1.732) times the normal running voltage that is used when it is connected in DELTA, resulting in a reduction of nearly one half the normal current.Once the motor picks up speed, the connection is changed to DELTA so that the motor runs at full speed and torque from then on. It's a bit like using the gears of an automobile.For more information please see the answers to the Related Questions shown below.
How do you change star to delta?
In motor starters, this is usually done using contactors. Explanation of this can easily be done using a circuit diagram. There are three contactors, the main, star and delta contactors-all these contactors can be the same type. There are many ways of wiring a star delta but here I will only give a generalized answer. First, the main contactor and star contactors are energised thus the motor runs in star. After about 5 seconds, the timer which gets energized at the same time as the main and star contactors, switches its CONTACTS i.e the normally open closes and the normally close opens. This dienergize the star contactor and energized the delta contactor. Thus, the motor now runs in delta.
Rear window won't move but motor runs?
Windows won't operate, but motor "runs"Usually this is an indication that the mechanical connection between the motor and the window lifting mechanism has become disconnected.You will need to go "inside" the affected door, and find the defect to correct it.
What appen if star to delta keep more than 35 seconds?
A star delta is intended for picking up large initial loads such as conveyors, draft fans, blowers etc. star is initiated to produce high starting torque to start revolutions and when the speed is speed is near 75% motor is set to delta operation. the time you said is not constant, it depends on the load. if delta is started before the motor reaching 75% of full speed then motor in delta mode can't handle the load and stops with over heated. it cause no problem if you don't initiate delta even after 75, cause the motor runs in star normally but the speed characteristics of star mode is poor.
Write a sentence with delta?
The Nile Delta runs into the Mediterranean Sea.
Why does my star delta motor run at very high amps in delta and eventually trips on overload after changing the overload protection device.It should normally run at 25amp in delta but runs at 170 amps?
THE FIRST THING IS TAKE THE READING OFF LOAD AND SEE IF THEY ARE BALANCED. HAS THE MOTOR BEEN RECENTLY REWOUND? GET A MOTOR REPAIR COMPANY TO LOOK AT THE MOTOR AND SEE IF IT HAS BEEN WOUND CORRECTLY. IF THE STAR-DELTA WORKS CORRECTLY IT SHOULD START IN STAR FOR ABOUT FIVE TO TEN SECONDS AND GO INTO DELTA THIS IS DEPENDANT ON THE STARTING CURRENT THE MANUFACTURE OF THE SWITCH AND THE APPLICATION. CHECK ALL THREE PHASES ARE BALANCED AND IF THEY ARE THE MOTOR WINDINGS MAY NOT BE CORRECTLY WOUND. SOME HAVE STAR CONNECTIONS BUILT IN.LOOKING AT THE AMPERAGE THE LOAD REQUIREMENT IS ONLY A FRACTION OF WHAT YOU ARE GETTING SO IT LEAVES ONLY TWO THINGS I......MOTOR FAULT 2.....WHAT EVER THE MOTOR IS DRIVING IS PUTTING A MASSIVE PRESSURE ON THE MOTOR CAUSING IT TO OVERLOAD.
Why one phase shows 0 Amps while a delta connected 3 phase induction motor runs?
Cause 2 phase is applied to the motor and another phase is disconnected ... in this condition ur motor cannot run longer ,it will trip on over current or burn ur motor winding .
Does a jet have a Motor or an Engine?
It depends on what it runs on. A motor runs on electricity and an engine runs on fossil fuels. It depends on what it runs on. A motor runs on electricity and an engine runs on fossil fuels.
