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Why leakage flux in transformer equivalent circuit is modeled as an inductor?
Wiki User
∙ 9y ago
Because some of the primary flux fails to link with its own winding, the back- e.m.f. induced into the primary winding will be slightly lower than it would be had there been no leakage at all. We can account for this 'loss' of induced voltage as though it were caused by a small voltage drop occurring in the primary circuit, due to a small inductive-reactance connected in series with the primary winding. We call this the 'primary leakage reactance' (Xp).
A similar explanation can be applied to the secondary circuit, thus giving the secondary circuit a 'secondary leakage reactance' (Xs).
Wiki User
∙ 9y ago
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Why leakage reactance is kept small?
Leakage reactance is useful for limiting the short circuit current in transformer and generators. therefore normally the reactance of transformer varies for 4.5% for distribution transformer to 12.5% for 400KV class.
What is transformer oil soak pit?
it is a pit which is used to drain leakage oil of transformers .AnswerIt's a walled area, surrounding a transformer, intended to contain any oil leakage from a transformer.
What is the importance of equivalent circuit of transformer?
Generally speaking, equivalent circuits are used to simplify a complex circuit into terms that are solvable with known relations. For example, in a transformer equivalent circuit you can account for winding losses and flux leakage with a series resistance and reactance on the primary side. Core losses can be modeled similarly with a parallel resistance and reactance on the primary also. Essentially when reflecting/referring an impedance to the primary side of a transformer, you are just seeing what the secondary impedance "looks like" to the primary side. Since the secondary impedance will determine the load on the primary, it is helpful to know how to relate it in terms of the primary so as to calculate the current flow in the primary due to the load on the secondary.
Why do you represent leakage flux in a transformer by inductive reactance?
A transformer is often represented by an equivalent circuit, in which the transformer itself is considered to be 'ideal', and its basic losses are then represented as resistance and reactance in series with both the primary and secondary windings for a loaded transformer, or just on the primary side for a transformer on open circuit.The transformer's primary flux comprises two components: the main flux, which links the primary and secondary windings, and a leakage flux which links just the primary winding. The leakage flux is considered arising from a self inductance in series with an 'ideal' primary winding. The reactance of this inductance is termed the primary leakage reactance. The voltage drop across this reactance will lead the primary no-load current by 90 degrees which, when added to the voltage drop across the resistance of the primary winding, acts to reduce the back emf of the primary winding below the value of the applied voltage and cause it to lag.A similar explanation accounts for the an inductance and resistance in series with the secondary winding, when the transformer is loaded.
How does an earth leakage transformer work?
What is the definition of earthing and how it works?
Why leakage reactance is kept small?
Leakage reactance is useful for limiting the short circuit current in transformer and generators. therefore normally the reactance of transformer varies for 4.5% for distribution transformer to 12.5% for 400KV class.
What is the Transformer about?
leakage rfactance
What is transformer oil soak pit?
it is a pit which is used to drain leakage oil of transformers .AnswerIt's a walled area, surrounding a transformer, intended to contain any oil leakage from a transformer.
What is the importance of equivalent circuit of transformer?
Generally speaking, equivalent circuits are used to simplify a complex circuit into terms that are solvable with known relations. For example, in a transformer equivalent circuit you can account for winding losses and flux leakage with a series resistance and reactance on the primary side. Core losses can be modeled similarly with a parallel resistance and reactance on the primary also. Essentially when reflecting/referring an impedance to the primary side of a transformer, you are just seeing what the secondary impedance "looks like" to the primary side. Since the secondary impedance will determine the load on the primary, it is helpful to know how to relate it in terms of the primary so as to calculate the current flow in the primary due to the load on the secondary.
Why do you represent leakage flux in a transformer by inductive reactance?
A transformer is often represented by an equivalent circuit, in which the transformer itself is considered to be 'ideal', and its basic losses are then represented as resistance and reactance in series with both the primary and secondary windings for a loaded transformer, or just on the primary side for a transformer on open circuit.The transformer's primary flux comprises two components: the main flux, which links the primary and secondary windings, and a leakage flux which links just the primary winding. The leakage flux is considered arising from a self inductance in series with an 'ideal' primary winding. The reactance of this inductance is termed the primary leakage reactance. The voltage drop across this reactance will lead the primary no-load current by 90 degrees which, when added to the voltage drop across the resistance of the primary winding, acts to reduce the back emf of the primary winding below the value of the applied voltage and cause it to lag.A similar explanation accounts for the an inductance and resistance in series with the secondary winding, when the transformer is loaded.
How does an earth leakage transformer work?
What is the definition of earthing and how it works?
What is leakage current in transformer?
In low voltage and electronics Leakage Current is any current that flows when the ideal current
What is leakage voltage?
There is no such thing.What there is is leakage current, which is the amount of undesired current flow in a branch of an actual circuit when that branch of the equivalent ideal circuit would have no current flow.Leakage current can also be used to refer to current that occurs on a path where there is no intentional circuit branch (e.g. corona discharge current to the air in a high voltage system).
What is function of snubber circuit?
capable of resetting the transformer as well as eliminating leakage inductance voltage spike across the switch
Can loose neutral wire effect the operation of Earth Leakage Circuit Breaker?
Yes, a loose neutral wire can effect the operation of Earth Leakage Circuit Breaker.
Which is best core or shell transformers?
Because the flux leakage is less in shell type than that in core type T/F.Additional AnswerA shell-type core's magnetic circuit is equivalent to a parallel electric circuit, so it has a lower reluctance compared to a core-type core of similar cross-sectional area.
What is the difference between ideal transformer and practical transformer?
There are basically 4 major differences :- 1. The windings (both primary and secondary) of an ideal transformer are considered to have zero resistance, hence the transformer is lossless. 2. There is no leakage flux in an ideal transformer. 3. The permiability of the core material in ideal transformer is considered to be tending to infinity and hence the current needed to set up the flux in the transformer is negligible. 4. There is zero hysterisis and eddy current losses in an ideal transformer.
