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Why generally the high voltage side of transformer is delta connected?
Wiki User
∙ 12y ago
I don't know what kind of transformer you are talking about, but most utility distribution Transformers are star connected on the primary side.
AnswerIt might be different in some other countries, but in the UK, three-phase distribution transformers are always connected in delta on their primary (high voltage) side, and in star (wye) on the secondary (low voltage) side. The primary line voltage is 11 kV, while the secondary line/phase voltages are 400 V and 230 V.
In the United States and Canada, the primary winding is also connected in delta -however, the secondary side is also connected in delta, with one phase centre- tapped to provide the split-phase 240/120 V arrangement.
The reason for using a delta connection is because three-phase high-voltage lines are supplied as three line conductors -there is no provision for a neutral- so there is no practical advantage in having a star-connected primary.
Wiki User
∙ 12y ago
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What is an Earthed voltage transformer?
An earthing transformer provides a neutral in a delta connected system.
Where is the use of earth transformer?
It is used in where the transformer are connected in star delta.
What is DYN11 of a transformer?
It's a description of the some of the electrical properties of the transformer. This is a Delta connected highside (the D), wye connected lowside (Y) that is grounded (N) and there is a 330 degree phase shift between the highside and the lowside (the low voltage is leading the high voltage by 30 degrees).
Is a step up transformer a Ynd or a Dyn?
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.
Advantages of Delta connections in Transformers?
1. A three phase transformer with HV side star connected and LV side delta connected results in economical design. 2. However, if star winding is required on the LV side due to load / safety requirements, then it is common to connect the HV side as delta. See next item to know why a delta winding is necessary. 3. Delta winding provides a path for third harmonic current present in the magnetising current due to core saturation. Hence, delta winding acts a thrid harmonic filter. This will help to eliminate non-sinusoidal voltage on transformer load terminals. This is an important feature of transformer design. Hence, in practice, all transformers will invariably have a delta winding.
Why you use delta star transformer instead of star star transformer in a consumer plant?
Generally speaking high-voltage three-phase systems are three-wire systems comprising three line conductors, so the high-voltage primary of the transformer is delta-connected (a delta connection has only three terminals, to which the three line conductors are connected). European low-voltage three-phase systems are four-wire systems, comprising three line conductors and a neutral conductor. To obtain this, the transformer's secondary must be star (wye) connected, with its earthed star point providing the neutral.
What is an Earthed voltage transformer?
An earthing transformer provides a neutral in a delta connected system.
Where is the use of earth transformer?
It is used in where the transformer are connected in star delta.
What is DYN11 of a transformer?
It's a description of the some of the electrical properties of the transformer. This is a Delta connected highside (the D), wye connected lowside (Y) that is grounded (N) and there is a 330 degree phase shift between the highside and the lowside (the low voltage is leading the high voltage by 30 degrees).
What is the relationship between phase and line values of current and voltage quantities for star and delta connected systems?
A: A DELTA transformer is a 1:1 voltage transfer delta to Y IS 1:2 voltage transfer. That is for 3 phase system, If the phases are not exactly matched or the voltage is not exactly right then on a Y setup there will be circulating current at the common node.
What is the percent efficiency of an open delta connected transformer?
67%
How do you tell if you have delta or wye power?
In Europe, low-voltage three-phase distribution is by means of a four-wire system (three line conductors and a neutral) supplied from a wye-connected transformer secondary. In North America, low-voltage is supplied from a delta-connected transformer secondary, one phase of which is centre-tapped and earthed (grounded). The single-phase supply to residences is then supplied by that particular phase, giving 240 V line-to-line and 120 V line-to-neutral. You can tell if you have a delta power when the phase voltage is equal to the line voltage and that you have a star power when the phase voltage =root 3(THE LINE VOLTAGE).
The Most suitable and economically connection for small high voltage transformer is?
delta star
Is a step up transformer a Ynd or a Dyn?
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.
What formula is in a delta connected load or source in line voltage?
Formula for what?!
Is 3 phase star transformer has more winding than delta?
The # of windings in a transformer are based on the primary and secondary voltages the transformer is rated for not the way the windings are connected.
Is there a neutral on a three phase transformer?
It depends on whether you are wye or delta connected. A transformer is a transformer, and a three phase transformer is simply three transformers. The key is in how you hook them up.AnswerIt depends on how the transformer is connected. If one set of windings is connected in star (or wye), then the star point is/canbe earthed and becomes the neutral for that particular connection; this is the standard connection for the secondary (low-voltage) of European distribution transformers. In North American three-phase distribution transformers, the secondary windings are connected in delta, and one phase is centre tapped, earthed, and that becomes the neutral point for a 240/120-V split-phase supply to a residence.This answer applies to both three-phase transformers, and to single-phase transformers which have been connected to form a three-phase transformer bank. (It is incorrect to say that a three-phase transformer is simply three single-phase transformers!)
