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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.
What else can I help you with?
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.
How do you connect an earthing transformer with delta connected secondary?
You have to connect each phase (R,Y & B respectively) of earthing transformer zig zag winding to each phase of power transformer delta secondary respectively. Then the zig zag winding of earthing transformer star point to be earthed.
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 percent efficiency of an open delta connected transformer?
67%
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 DY11 transformer?
A DY11 transformer is a three-phase transformer configuration where the high voltage winding is connected in a delta (Δ) configuration and the low voltage winding is connected in a star (Y) configuration. This configuration is commonly used in power distribution systems to step down high voltage to a lower voltage for industrial and commercial applications.
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.
