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Differentiate delta to delta connection of the transformer to delta to Y connection?
Wiki User
∙ 14y ago
In delta to delta there will be no ground on both primary and secondary sides. Leave the primary side but we take care on secondary side. If there any fault occurs on the secondary then there will be unbalanced voltages between the phases results in the flow of current through the secondary windings so only we are using star on the secondary side while having neutral to prevent such a current flow.
Wiki User
∙ 14y ago
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Why is the Neutral fundamental in a three phase Y-Y Transformer connection?
Suppression of harmonics
What connection that increases voltage?
by using Y-Y(Star) transformer..... bcoz in star VL = root 3* Vph
Why is 277 3 phase called DELTA and 208 3 phase called Y It seems to you they have pretty much same attributes?
408 volts x 1.73 = 277 volts is the star ( Y ) point of 3 phase 480V. A transformer connected in a Delta configuration is different than a Y or Star configuration. 277 volts is a voltage that is used in industrial plants usually for lighting. The following link will explain the whole star delta connection. http://www.allaboutcircuits.com/vol_2/chpt_10/6.html
Why delta connection is made in primary side of step down transformere?
not necessarily if the power source is delta the y voltages (or phase to ground) may not be predictable there is 3phase delta with one leg grounded there is 3 phase 240 delta with center of one phase grounded for 120/240 single phase for lights primary on these is all 240 delta y would be 0 120 132 240 or 277 depending on that ground point
What is vector group Ynyn0 in transformer?
it is a star to star connected transformer. It having two neutrals. One is at Primary side and another is at secondary side to balance the loads. Y= Primary star connection N=Primary Neutral y=secondary star connection n=secondary neutral and 0=No phase shift between primary and secondary. So,finally this meaning is star to star connected with two neutrals and zero phase displacement. Please refer below i detailed some notations to calculate any other vector groups D= Primary Delta connection d=Secondary Delta connection a=Auto transformer Z=Zig zig connection 11=30 degrees phase shift b/w primary & secondary 1= 30 degrees phase shift b/w primary & secondary 1) Consider capital letters for Primary notations 2) Consider small letters for secondary notations 3) Consider Clock reference at 12.00 for calculation of degrees I think this procedure is very useful to calculate for other vector groups.
Why we get the 0 level in trans farmer when we use delta to star connection when you get the 220 volts at each terminals of star connection of transformer how we get 0 level or neutral equals to 0?
A: In the USA there is D delta connection or Y connection. The Y center point may not be zero if there is circulating current due to mismatch of the phases
What are the advantages of using a delta connection?
A delta connection requires only three wires while a Y connection requires 4 wires.
Why is the Neutral fundamental in a three phase Y-Y Transformer connection?
Suppression of harmonics
What is the difference between a Y - delta starter and a star - delta starter?
No difference. Y is used as a symbol to indicate the star connection.
Application of Y-delta transformations?
delta-wye is a common type of 3-phase transformer configuration. It offers a good voltage gain and the delta transformer is useful in unstable systems for removing the third harmonics. The transformation is necessary for analyzing the circuit.
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.
What connection that increases voltage?
by using Y-Y(Star) transformer..... bcoz in star VL = root 3* Vph
What is vector group of power transformer?
Hi first of all Vector group used to determine the PHASE shift of the TRANSFORMER as well as the PRIMARY and SECONDARY connection information. Let taken an example:- YNyn0d1 It means CAPITAL LETTERS indicates the primary side of winding detail's small letters for secondary side detail's DELTA CONNECTION Symbol D OR d is used and connection WYE used Y OR y for PRIMARY and SECONDARY. If WYE connection is their neutral always come so we used suffix N OR n. Now check PHASE angle Difference (PHASE ANGLE) see the last NUMERIC VALUE give correct information. Suppose we connect/compare two TRANSFORMER we first see its VECTOR GROUP if they matched then we do move to any connection. If any quarries fill-free to ask ajay.sahu099@gmail.com
Why is 277 3 phase called DELTA and 208 3 phase called Y It seems to you they have pretty much same attributes?
408 volts x 1.73 = 277 volts is the star ( Y ) point of 3 phase 480V. A transformer connected in a Delta configuration is different than a Y or Star configuration. 277 volts is a voltage that is used in industrial plants usually for lighting. The following link will explain the whole star delta connection. http://www.allaboutcircuits.com/vol_2/chpt_10/6.html
How do you differentiate and find the tangent?
When you differentiate a function, you find the slope of the function. The slope is also known as the tangent. The slope of a line, given one point, and a second point relative to the first point, but with x different, is given as delta y over delta x. Differentiation is simply taking the limit of the slope, i.e. where delta x approaches zero.
What is the vector diagram of ynd11 transformer?
In the vector group representation for this transformer, the letter 'y' represents a wye- or star-connection, and the letter 'd' represents a delta- or mesh-connection (I have no idea what 'n' stands for -anyone?). An upper-case letter indicates the higher voltage, while a lower-case letter represents the lower voltage. The sequence of the letters indicates the primary and the secondary windings. So the transformer in question is a wye-delta connection (presumably the 'y' should have been capitalised, meaning that this is a step-down transformer: i.e. Yd11).The number appearing after the letter group (in this case '11') is a multiplier of 30o and indicates the transformer connection's angular displacement (or phase displacement). In this case, the angular displacement is 11 x 30o = 330o.As angular displacement is defined as 'the angle by which the secondary line voltages lag the primary line voltages', this means the secondary line voltages of this particular transformer lags its corresponding primary line voltages by 330o.So, to draw the phasor (not 'vector') diagram for this particular transformer, you would start by drawing the phase voltages (VAN, VBN, and VCN) of the primary wye connection (using VAN as the phasor of reference), from which you would then construct the corresponding line voltages (VAB, VBC, and VCA). To finish the diagram, you will then draw the secondary delta phasor diagram, starting with Vab lagging VAB by 330o (or, if you prefer, leading by 30o), then drawing Vbc and Vca displaced by 120o.
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.
