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How can a delta circuit be converted into a star circuit?
With a transformer...
What is the formula to calculate the overload setting for a star delta starter?
Full load current ofthe motor x 0.58
The Most suitable and economically connection for small high voltage transformer is?
delta star
What is Full load current for 40 HP star delta motor?
What is the continuous current of 10HP star delta motor
Differentiate delta to delta connection of the transformer to delta to Y connection?
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.
Why we use delta-star transformer instead of star-star transformer in a consumer plant.?
There is a problem called "neutral phase shift" in star-star transformer, if we connect unbalance load(single phase load at secondary), then the phase point is shifted towards neutral. we require sinusoidal secondary voltage at secondary, for this flux must be sinusoidal. Flux will be sinusoidal, if it contains the third harmonic component of exciting current. so third harmonic current can not flow in star-star transformer. so we use delta-star transformer,in delta , third harmonic component can flow & get sinusoidal output.
What are the problems associated with the three-phase transformer connection?
One must check the design of the transformer windings. STAR - Delta or Star to star or Delta - star or Delta Delta. Wiring must be done accordingly.
Where is the use of earth transformer?
It is used in where the transformer are connected in star delta.
Is the star-delta transformer commissioned without earthing transformer or NGR?
Yes, possible. NGR or earthing transformers are used when it is necessary to limit the fault current.
How can a delta circuit be converted into a star circuit?
With a transformer...
How can a star circuit be converted into delta circuit?
With a transformer...
What is mean by electrical sag?
How to calculate current of star and delta moter with 55kw 380v 85%
What is the formula to calculate the overload setting for a star delta starter?
Full load current ofthe motor x 0.58
The Most suitable and economically connection for small high voltage transformer is?
delta star
What is the principal use in star - delta transformer connection?
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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.
What is the equation of stardelta?
The voltage of a winding that is connected in star is 1 over the square root of three, 1 / 1.732, or 0.5774, of the voltage if that winding were connected in delta. This results in a star power of 1/3, or 0.3333, of the delta power.Similarly, if you know the winding current in delta, you can calculate the star current by multiplying by 1.732.This all presumes that the neutral point of the star is symmetrically centered in the middle of the phase triangle.
