A of two coils of wire, also known

Asingle phase transformer is made up of two coils of wire, also known aswindings.

These are wound on a type of core material. Typically these windingsare wound in either a rectangular or cylindrical form around a separatecore/limb which is made up from soft iron. The primary winding is the one thatconnects directly to the source, the secondary is the one that connectsdirectly to the load. The diagram below displays what the primary and secondarywindings look like.Althoughit looks like it the two coils are not in electrical contact with one another,in fact they are wrapped closely together around a common closed magnetic ironcircuit which is referred to as the ‘core’. The soft iron core is not actuallya complete solid, it consists of individual laminations that are combined toavoid losses within the core. The primary and secondary windings aremagnetically linked through the common core but are completely electricallyisolated from one another.

Best services for writing your paper according to Trustpilot

Premium Partner
From $18.00 per page
4,8 / 5
4,80
Writers Experience
4,80
Delivery
4,90
Support
4,70
Price
Recommended Service
From $13.90 per page
4,6 / 5
4,70
Writers Experience
4,70
Delivery
4,60
Support
4,60
Price
From $20.00 per page
4,5 / 5
4,80
Writers Experience
4,50
Delivery
4,40
Support
4,10
Price
* All Partners were chosen among 50+ writing services by our Customer Satisfaction Team

This enables electrical power to be conveyed fromone coil to another. A magnetic field can be formed when an electrical currentflows through the primary winding, this then induced a voltage through thesecondary winding. Athree phase transformer can be made up in two different ways, core or shell.Thecore type consists of three individual limbs made up of individual laminations.Each singular limb has cylindrical shaped primary and secondary windings whichare aligned concentrically. The diagram below shows what the core typeconstruction looks like. Thealternative construction is the shell type, this type is similar to the coreconstruction, the difference is that within this arrangement each phase has itsown personal magnetic circuit. Also the windings are wound around the limbshorizontally instead of vertically.

The diagram below illustrates what a shelltype transformer looks like.Singlephase transformers tend to be generally small in size and can be found on mostroads/streets. They are usually in metal shed surrounded by a fence/guard, thisis to avoid any trespassers gaining entrance and potentially causing damage orhurting themselves. The transformer should be able to work well in warm, coldand wet weathers. Although the transformer is in a shed it is not completelyresistant to these environments therefore it should be able to withstand themand function properly. Threephase transformers are to be treated differently as they are potentially farmore dangerous. These transformers are sometimes stored in a safe place that isnot so easy to access. Being stored in a secured area also allows for a forcedair flow to assist the transformer in keeping cool.

A transformer under ‘no load’ conditions has noload on the secondary side of the transformer, this means that the secondarywinding is open circuited. The current within the secondary will remain at zero, on theother hand the primary windings will hold a small amount of current which isreferred to as a ‘no load current’ this is typically around two to ten percentof the rated current. This current has the responsibility of supplying ironlosses inside of the core. It is also responsible for a very small amount ofcopper loss from the primary winding.A transformer under a loaded condition has a loadconnected to the secondary winding, which makes the transformer loading greaterthan zero.

A current travels from the secondary winding then out through theload. The load can be one of three things; resistive, capacitive or inductive. Thesecondary current is caused by the induced secondary voltage, this is set up bythe magnetic flux that is created in the core of the primary current. Thesecondary current creates a self-induced secondary magnetic field which islocated inside the core of the transformer. The two magnetic fields repel eachother which creates a combined magnetic field of less magnetic strength than asingular field produced by the primary winding alone, when the secondarycircuit was open circuited. The combination of the magnetic fields reduces theback EMF of the primary winding, this resulting in a slight increase of theprimary current.

This current will continue to increase until the coresmagnetic field returns to its original strength. To ensure to transformeroperates correctly here must be a balanced condition existing between theprimary and secondary magnetic fields. This will result in the power beingbalanced and the same on both primary and secondary sides.Inprimary winding, each phase is 120 degrees out of phase with the other twophases, this is also the same in secondary winding. The individual primarywindings are linked magnetically to a singular secondary winding through acommon core leg. In the vector diagram, sets of windings that are linkedmagnetically are drawn parallel to each other. Within this type of connectionboth the primary and secondary windings are connected to a neutral point.

This neutralpoint can be brought out to an external physical connection and can also begrounded. Advantagesof Star-star:·        Suitable for three phases four wire systems·        Can handle heavy loads·        Elimination of distortion in the secondary phase voltage·        Better protective relayingDisadvantagesof Star-star·        There can be a large voltage drop for unbalanced phase to neutral loads·        Transformer tank overheating·        Over voltage at light loadWithinthe Delta-star connection, the primary is connected in a delta arrangement and secondaryis connected to star. The main application of this connection is to step up thevoltage. For example, this could be at the beginning of a high tensiontransmission system. Between both the primary and secondary line voltage youcan find a phase shift of 30 degrees.Belowis images of the Delta-Star connection and the Phase shift of 30 degreesbetween both primary and secondary line voltage.Dueto the primary being delta connected, the line voltage on the primary side is equalto the phase voltage on the secondary side.

Now transformation ration, alsoknown as (K) is equal to the secondary phase voltage divided by the primaryphase voltage. The secondary phase voltage is equal to (K) times primary phasevoltage.Dueto the secondary being star connected the line voltage on the secondary side isequal to  times the phase voltage on the secondary side.Line voltageon the secondary side =  x (K) x primary phase voltage.Line voltageon tAsingle phase transformer is made up of two coils of wire, also known aswindings. These are wound on a type of core material.

Typically these windingsare wound in either a rectangular or cylindrical form around a separatecore/limb which is made up from soft iron. The primary winding is the one thatconnects directly to the source, the secondary is the one that connectsdirectly to the load. The diagram below displays what the primary and secondarywindings look like.

Althoughit looks like it the two coils are not in electrical contact with one another,in fact they are wrapped closely together around a common closed magnetic ironcircuit which is referred to as the ‘core’. The soft iron core is not actuallya complete solid, it consists of individual laminations that are combined toavoid losses within the core. The primary and secondary windings aremagnetically linked through the common core but are completely electricallyisolated from one another. This enables electrical power to be conveyed fromone coil to another. A magnetic field can be formed when an electrical currentflows through the primary winding, this then induced a voltage through thesecondary winding. Athree phase transformer can be made up in two different ways, core or shell.Thecore type consists of three individual limbs made up of individual laminations.

Each singular limb has cylindrical shaped primary and secondary windings whichare aligned concentrically. The diagram below shows what the core typeconstruction looks like. Thealternative construction is the shell type, this type is similar to the coreconstruction, the difference is that within this arrangement each phase has itsown personal magnetic circuit.

Also the windings are wound around the limbshorizontally instead of vertically. The diagram below illustrates what a shelltype transformer looks like.Singlephase transformers tend to be generally small in size and can be found on mostroads/streets. They are usually in metal shed surrounded by a fence/guard, thisis to avoid any trespassers gaining entrance and potentially causing damage orhurting themselves. The transformer should be able to work well in warm, coldand wet weathers. Although the transformer is in a shed it is not completelyresistant to these environments therefore it should be able to withstand themand function properly. Threephase transformers are to be treated differently as they are potentially farmore dangerous. These transformers are sometimes stored in a safe place that isnot so easy to access.

Being stored in a secured area also allows for a forcedair flow to assist the transformer in keeping cool.A transformer under ‘no load’ conditions has noload on the secondary side of the transformer, this means that the secondarywinding is open circuited. The current within the secondary will remain at zero, on theother hand the primary windings will hold a small amount of current which isreferred to as a ‘no load current’ this is typically around two to ten percentof the rated current.

This current has the responsibility of supplying ironlosses inside of the core. It is also responsible for a very small amount ofcopper loss from the primary winding.A transformer under a loaded condition has a loadconnected to the secondary winding, which makes the transformer loading greaterthan zero.

A current travels from the secondary winding then out through theload. The load can be one of three things; resistive, capacitive or inductive. Thesecondary current is caused by the induced secondary voltage, this is set up bythe magnetic flux that is created in the core of the primary current. Thesecondary current creates a self-induced secondary magnetic field which islocated inside the core of the transformer. The two magnetic fields repel eachother which creates a combined magnetic field of less magnetic strength than asingular field produced by the primary winding alone, when the secondarycircuit was open circuited. The combination of the magnetic fields reduces theback EMF of the primary winding, this resulting in a slight increase of theprimary current.

This current will continue to increase until the coresmagnetic field returns to its original strength. To ensure to transformeroperates correctly here must be a balanced condition existing between theprimary and secondary magnetic fields. This will result in the power beingbalanced and the same on both primary and secondary sides.

Inprimary winding, each phase is 120 degrees out of phase with the other twophases, this is also the same in secondary winding. The individual primarywindings are linked magnetically to a singular secondary winding through acommon core leg. In the vector diagram, sets of windings that are linkedmagnetically are drawn parallel to each other. Within this type of connectionboth the primary and secondary windings are connected to a neutral point.

This neutralpoint can be brought out to an external physical connection and can also begrounded. Advantagesof Star-star:·        Suitable for three phases four wire systems·        Can handle heavy loads·        Elimination of distortion in the secondary phase voltage·        Better protective relayingDisadvantagesof Star-star·        There can be a large voltage drop for unbalanced phase to neutral loads·        Transformer tank overheating·        Over voltage at light loadWithinthe Delta-star connection, the primary is connected in a delta arrangement and secondaryis connected to star. The main application of this connection is to step up thevoltage. For example, this could be at the beginning of a high tensiontransmission system. Between both the primary and secondary line voltage youcan find a phase shift of 30 degrees.Belowis images of the Delta-Star connection and the Phase shift of 30 degreesbetween both primary and secondary line voltage.

Dueto the primary being delta connected, the line voltage on the primary side is equalto the phase voltage on the secondary side. Now transformation ration, alsoknown as (K) is equal to the secondary phase voltage divided by the primaryphase voltage. The secondary phase voltage is equal to (K) times primary phasevoltage.Dueto the secondary being star connected the line voltage on the secondary side isequal to  times the phase voltage on the secondary side.

Line voltageon the secondary side =  x (K) x primary phase voltage.Line voltageon the secondary side =  x (K) x primary line voltage. The advantagesof Delta-Star connection: ·        Cross section area in winding is less at primaryside·        Used at three phase four wire systems·        Can handle large unbalanced loads·        No distortion of secondary voltage  Thedisadvantages of Delta-Star connection: ·        Cannot operate in parallel as the secondary voltageis not in phase with the primary·        Secondary voltage is shifted by 30 degrees withrespect to primary voltage. This becomes a problem when paralleling three phasetransformers. As previouslystated, this type of connection is typically used in a step up transformer. It iscommonly used within the commercial and industrial sector, also high-densityresidential locations. This is to supply three phase distribution systems.

he secondary side =  x (K) x primary line voltage. The advantagesof Delta-Star connection: ·        Cross section area in winding is less at primaryside·        Used at three phase four wire systems·        Can handle large unbalanced loads·        No distortion of secondary voltage  Thedisadvantages of Delta-Star connection: ·        Cannot operate in parallel as the secondary voltageis not in phase with the primary·        Secondary voltage is shifted by 30 degrees withrespect to primary voltage. This becomes a problem when paralleling three phasetransformers. As previouslystated, this type of connection is typically used in a step up transformer. It iscommonly used within the commercial and industrial sector, also high-densityresidential locations. This is to supply three phase distribution systems.

x

Hi!
I'm Simon!

Would you like to get a custom essay? How about receiving a customized one?

Check it out