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Why the load must be delta connection instead using star connection?
Wiki User
∙ 11y ago
in order to reduce the impact of fault current...
Wiki User
∙ 11y ago
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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 the difference between an open delta and an open wye connection?
An open delta connection is a delta connection with one phase removed, but still supplied with three line conductors. An open wye is a wye connection with one phase removed, supplying a three line conductors and a neutral conductor. An open-delta/open-wye is a method of providing a reduced-load three-phase supply using just two single-phase transformers, rather than the preferred method of using three single-phase transformers.
What is phase angle between line and phase currents in delta?
A delta connection should cause a 30 degree phase shift. It is necessary to know the configuration to tell whether this is +30 or -30 degrees.Also, if you invert the connection, you can end up with [-30 + 180] 150 or [30 + 180] 210 degree phase shifting.I've seen one transformer that had a delta connection that was phase shifted 150 degrees, but this is definitely NOT the norm.CommentSince the current is determined by the load, the answer to this question is that it depends upona. the nature of the load (resistive, R-L, R-C, R-L-C), andb. whether the load is balanced or unbalanced.In other words, it depends....
Why pure inductive load is used to for finding zero power factor instead of using pure inductive load?
The question makes no sense. It asks why a pure inductive load is used ... instead of a pure inductive load. Please restate the question.
What is open delta connection in three phase transformer?
When you see "Delta" it is a kind of winding used in transformers or motors Think of a triangle. Each leg of the triangle is a winding. Power is connected to each of the three points of the triangle.For more information see the answers to the Related Questions shown below.
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 are the advantages of using star connection?
The inrush current is reduced. This is the reason for star delta starters. Motor starts on star and after about 10 to 15 seconds, depending on the load of the motor, it switches to a delta configuration to run.
What is the difference between an open delta and an open wye connection?
An open delta connection is a delta connection with one phase removed, but still supplied with three line conductors. An open wye is a wye connection with one phase removed, supplying a three line conductors and a neutral conductor. An open-delta/open-wye is a method of providing a reduced-load three-phase supply using just two single-phase transformers, rather than the preferred method of using three single-phase transformers.
What is open delta connection explain with circuit diagrams?
If one of the transformer is unable to operate, then the supply used to load can be continued with the remaining tow transformers at the cost of reduced efficiency. This is known as open delta connection or V-V connection.
What can be done with the help of star and delta conversions?
Using star delta method of wiring you can run high rated motor with out any high starting current. Star connection can provide 3 phase power as well as single phase load
How much you can save the power from converting star delta connection to star connection?
The power of a three-phase load is the sum of the three individual loads. It makes no difference whether they are connected in star (wye) or in delta.
Why you make initially star-connection then delta-connection?
This type of motor starting is used to reduce the inrush current to a lower level. Once the motor is operating at the lower level of run current it changes to a delta connection which allows the motor to operate at its full load amperage rating.
Why does delta connection have no neutral connection?
Lets compare between a star and delta connection in 3-phase power types. In a star connection, there are 6 connections (A1, B1 and C1 being the outer arms of the 3 armed star and at the centre, A2, B2 and C2). The center is called the neutral or star point which carries out the any unbalanced current loads through its connection. That is why if you lose out the neutral point in a star connection, there will be an overflow of current through to the loads. The loads also take in more current, generating much more power and could damage the appliance you are using and the components the line current is connected to, since excess heat and overworking may result.In a delta connection, the connection has only 3 and on a piece of paper it is sketched as the connections being joined arm to arm. One side is A phase, B phase and C phase. Getting to the point, a Delta connection does not have a earth wire because the live voltage is always the same throughout the connection. Since phase and line voltage are the same and constants. It also means the line current will change without affecting other components within the circuit. Balanced Delta connected circuits or loads can only have their power supply sourced from a star connection and a balanced Star load can only have their voltage supply come from a delta connection.Another AnswerWith a delta connection, the phasor sum of the three line currents is zero, whether the load is balanced or unbalanced, so no neutral is necessary.
What is phase angle between line and phase currents in delta?
A delta connection should cause a 30 degree phase shift. It is necessary to know the configuration to tell whether this is +30 or -30 degrees.Also, if you invert the connection, you can end up with [-30 + 180] 150 or [30 + 180] 210 degree phase shifting.I've seen one transformer that had a delta connection that was phase shifted 150 degrees, but this is definitely NOT the norm.CommentSince the current is determined by the load, the answer to this question is that it depends upona. the nature of the load (resistive, R-L, R-C, R-L-C), andb. whether the load is balanced or unbalanced.In other words, it depends....
What is the advantage of an open delta transformer?
An open-delta connection is a method of providing a three-phase supply, using two single-phase transformers. It is particularly useful if , say, one single-phase transformer, part of a three single-phase transformers forming a three-phase transformer bank, becomes damaged -allowing the two remaining transformers to provide a temporary three-phase supply to the load. The drawback with this connection is that the capacity of the transformer bank is reduced, and it can only provide a lower load current.
Why pure inductive load is used to for finding zero power factor instead of using pure inductive load?
The question makes no sense. It asks why a pure inductive load is used ... instead of a pure inductive load. Please restate the question.
What is open delta connection in three phase transformer?
When you see "Delta" it is a kind of winding used in transformers or motors Think of a triangle. Each leg of the triangle is a winding. Power is connected to each of the three points of the triangle.For more information see the answers to the Related Questions shown below.
