It is not true that another name for the "Y" or "wye-connected" system of polyphase power is the "delta" system. It's called the "star" system.
A wye connection referring to electrical connections is where one end of the three coils of a three phase system are joined together and usually grounded. The three phase supply voltage is then connected to the other ends of these coils. In electrical terminology it is also known as a star connection.
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.
If the motor is connected to an ungrounded delta supply service there will be no effect on the operation of the motor. If the motor is connected to a wye system supply service and the B phase grounds out, the motor's overload protection would take the motor off line from the electrical supply.
As far as I understand, you don't need neutral line for connecting appliances that is 3-phase compilant. You only need the neutral line to connect a single phase appliance, which you connect along with one of the three lines.
It is not true that another name for the "Y" or "wye-connected" system of polyphase power is the "delta" system. It's called the "star" system.
If you are referring to an alternating current system, then a phase describes a winding, or a load, that is connected between any two line conductors in a delta-connected system, or between any line and the neutral conductor in a wye-connected system.
The transformer connection. Transformers can be connected in Wye (One side of each winding connected to the phase wire and the other connected to neutral or ground) or Delta (the polarity of each winding connected to the nonpolarity of another winding to form a triangle).There are different problems that arise as a result of being connected wye vs. delta or vice versa, and multiple fixes or partial fixes to address these.Alternative Answer'Wye' (also known as 'star') and 'delta' (also known as 'mesh') are two methods (there are others!) of connecting the three phase windings of alternators, transformers, and loads such as motors). A wye connection is generally a four-wire system, comprising three line conductors and a neutral conductor, whereas a deltaconnection is a three-wire system, comprising three line conductors. For a perfectly-balanced load (e.g. a three-phase motor), a wye-connected system can dispense with the neutral conductor. In wye-connected systems, the line voltage (line-to-line) is 1.732 times larger than the phase voltage (line-to-neutral). In a delta-connected system the line voltage is exactly the same as the phase voltage (line-to-line in both cases).
The Wye (also know as Star - especially in the motor rewind industry) is a 4-wire system which provides two different supply voltages. The center-point of the Wye is the system neutral and is usually solidly grounded. Where it is desirable to limit the phase-to-ground fault magnitude the center-point of the Wye may be connected to ground through and neutral grounding resistor or a current limiting reactor. Because the system is tied to ground it is easy to provide system ground fault protection. Three-phase loads can be connected phase-to-phase and singlephase loads can be connected from any phase to the system neutral. On a wye system, the phase unbalance currentis carried by the system neutral. On a Wye system the line current is equal to the phase current i.e. ( ILine 1 = IPhase A) and the line-to-line voltage is equal to the vector sum of two individual phase voltages i.e. (E Line1-2 = E PhaseA + E PhaseB' ). In a Wye system the phase-to-phase voltage is 1.732 x the phase-to-ground voltage. Some typical Wye system voltages are: 120/208Y, 277/480Y, 2400/4160Y, 4160/7200Y, 7200/12470Y, 7620/13200Y,and 19920/34500Y
Using a combo wye in a plumbing system offers advantages such as efficient drainage, reduced clogging, and easier maintenance.
Whether a transformer is 'step up' or 'step down' has nothing to do with the way its windings are connected, so it could be wye-delta or delta-wye.
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.
A plumbing wye is used in a drainage system to divert or connect pipes at a 45-degree angle, allowing for the flow of wastewater in different directions.
A wye connection referring to electrical connections is where one end of the three coils of a three phase system are joined together and usually grounded. The three phase supply voltage is then connected to the other ends of these coils. In electrical terminology it is also known as a star connection.
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.
One application is to determine the neutral current in an unbalanced wye (star) connected load.
no