A V-V connected transformer can be connected in parallel to delta-delta connected transformer but not to
The V-V connected transformer and D-D connected transformers have same phase displacement, so they only can be connected in parallel to each other.
Three units of single phase transformers and one single three-phase transformer rating
Three single phase transformers and one single unit of three phase transformer will be same only. this is done to reduce the cost and spacing.
The transformer which is more feasible to use in the distribution ends should be
Star-delta will have lower voltage at delta end.
The delta-delta connections are used in applications of
Delta connected winding handle line voltages so it needs more turns in the winding but thin wires.
Open delta transformers can be obtained from
If one of the transformers is removed from the bank of only delta-delta, then it behaves with 58% power delivery.
If para magnetic core is used in the place of the ferromagnetic core of the transformer, then magnetostriction will
If the core is not ferromagnetic then the transformer will not operate at all so no humming sound.
When we magnetize the ferromagnetic core of the transformer, core length_______ and it ______ when demagnetized.
Due to aligned magnetic dipoles in the material, the size will reduce by a small margin and vice versa while demagnetization.
A 400 V, 10 KVA transformer at 50 Hz, is operated at the frequency of 40 Hz, then the humming
If the frequency is reduced, the core flux density increases, so the noise also will increase.
A recording of the output of the emf induced for star and delta are recorded.Then shape of the emf induced in Y-connected 3-phase transformer is non sinusoidal in nature due to
In a star connected transformer, closed path to generate 3rd harmonic is not there. So the emf shape will be peaky in nature.
Below is the circuit diagram for delta-delta transformer have a transformation ratio ‘k’. The current flowing in the windings of phase r-y in the below diagrams is
The phase current will be reduced by 1/1.73.