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This is better explained through a wiring diagram. AC 3 phase motor has three windings. Each winding has two terminals. Lets us denote each winding as follows. Winding 1 - A1 and A2, Winding 2 - B1 and B2. Winding 3 - C1 and C2. Main incoming supply, 3 phases, are denoted by R, Y and B. Connect R to A1, Y to B1, B to C1. Connect A2,B2 and C2 to a common point (neutral). I strongly suggest to refer to motor name plate, its wiring diagram. You need to also check the direction of rotation.
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How can you terminate a 3 wire wye motor to a 3 phase delta connection?
To terminate a 3 wire wye motor to a 3 phase delta connection you need a 3 phase transformer to convert from delta to wye. Do not lift the common neutral connections inside the motor and rewire for delta, because the voltages will be wrong.
How will the speed and the slip of the motor change with increasing load in star wye and delta connection?
the speed decrease if increasing load..in star connection the speed lower
What is wye-delta motor control?
It is a type of starter that allows a motor to be started across the line by starting the motor with a reduced inrush current. The motor is started in a wye configuration until it gets up to speed and then a timer drops the wye contactor out a draws the delta configured contactor in. The motor then operates in a delta wired configuration.
Condition of three phase in which there is no need of neutral?
A delta-connected system is described as being a three-phase, three-wire, system, and doesn't have a neutral. But a balanced star (wye) connected load (e.g. a three-phase induction motor) doesn't actually require a neutral.
Is a three phase high leg delta better than a wye for a motor?
There is really no advantage, the only purpose of having the variety is for motor manufacturer companies to be able to sell their product to customers if the building's electrical service is of a Delta of Wye configuration.
How can you terminate a 3 wire wye motor to a 3 phase delta connection?
To terminate a 3 wire wye motor to a 3 phase delta connection you need a 3 phase transformer to convert from delta to wye. Do not lift the common neutral connections inside the motor and rewire for delta, because the voltages will be wrong.
Should a star-delta motor be supplied wye or delta power?
A star-delta motor should be supplied star-delta.Wye is simply another name for star. Star-delta motors use a star or wye configuration to start, and a delta configuration to run. This reduces the voltage on the windings during the high current starting time.
How will the speed and the slip of the motor change with increasing load in star wye and delta connection?
the speed decrease if increasing load..in star connection the speed lower
Power a 415volt motor with 480volts?
in low voltage connection in wye (star conncetion) 415v high voltage connection in delta 480v
What is wye-delta motor control?
It is a type of starter that allows a motor to be started across the line by starting the motor with a reduced inrush current. The motor is started in a wye configuration until it gets up to speed and then a timer drops the wye contactor out a draws the delta configured contactor in. The motor then operates in a delta wired configuration.
How much voltage does star-Delta starter give to motor at start?
A delta starter supplies what ever the supplied voltage to the line side of the contactor is. The inrush current is usually 300% of the full load amperage of the motor. Edit to above answer: Actually the question is for a Wye-Delta Starter (Wye=Star). There are two contactors, one in Wye configuration and one with Delta. The Wye is used to start and the Delta for run. This is a reduced voltage start scheme. Though the line supply voltage remains the same, for instance 480VAC, the phase voltage at the motor will be different for the Wye: V(phase) = V(line)/1.732 In a Delta V(phase) = V(line) So the Phase Voltage during the start will be 277VAC and then when the motor is spinning, usually after a set time delay, the Wye contactor drops out and the Delta contactor kicks in so that Phase Voltage is now the full 480VAC.
How do you wire a three phase motor with two speed?
Star and delta connection
How can you wire a 3-pole isolator to disconnect a 6-wire star delta motor away from the mcc and near the motor?
You can't. You need a 6 pole isolator
Is there a neutral conductor in a 3 phase 4 wire wye system?
no
How does 3 wire and 4 wire system differs?
If you are referring to a.c. three-phase systems, then a three-wire system is associated with a delta-connected system, while a four-wire system is associated with a star, or wye, system. The conductors being three line conductors and a neutral conductor.
Why use link in star contactor?
The link in the star contactor is used to form the star point of three of the motor leads. On most star wound motors the star point is inside the motor windings. On a motor that can be used for star delta starting it is a six wire motor. The star point winding depends on the contactor to tie the coil ends together externally in the control panel of the star delta starter.
What will happen when motor is connected to star?
If the motor is designed to operate on star (wye) then it is fine. If it is designed to operate on delta, then you need to consider that star will present lower operating voltage than delta, and that might damage the motor.Some motors are designed to start on star and run on delta. Usually, this applies to larger motors, and cannot be overlooked. If there are only three wires (ignoring chassis ground), then the motor is intended for delta. If there are only four wires, the the motor is intended for star. If there are six wires, then the motor is intended for star-delta. Of course, the starter controls could be integrated with the motor, so it is best to consult the name plate and operate the motor exactly as it was designed.
