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Q. Briefly explain about Wye-delta transformation?
Certain network configurations cannot be reduced or simplified by series-parallel combinations alone. In some such cases wye-delta (Y- ) transformation can be used to replace three resistors in wye configuration by three resistors in delta configuration, or vice versa, so that the networks are equivalent in so far as the terminals (A, B, C) are concerned, as shown in Figure. For equivalence, it can be shown that
For the simple case when RA = RB = RC = RY, and RAB = RBC = RCA = R , Equations (1) and 2) become
Determine the Dielectric constant of slab: An air capacitor contains two parallel plates 10 cm 2 in area and 0.5 cm apart. While a dielectric slab of area 10 cm2 and thicknes
The armature of a four-pole dcmachine has a simplex lap wound commutator winding (which has the number of parallel paths equal to the number of poles) with 120 two-turn coils. If t
Q. Show the procedure of Octal to Decimal Conversion? To convert from Octal to Decimal, multiply the value in every position by its Octal weight and add each value. Using the v
Prepaid Metering Prepaid metering is the state of art for single and three-phase although current metering, and should be implemented through utilities desirous of protecting
Determine flux in the central limb: For the magnetic circuit shown in Figure the value of flux in the right limb is 0.48 m Wb and the number of turns wound on the central limb
Key Performance Indicators in Business Significance of Key Performance Indicators (KPIs) in the business of power especially within a change environment due to partial deregul
Find the power supplied by the voltage source and the power absorbed by the 24 Ω resistor (R3) in the circuit shown below: Determine the voltage V2 in the circuit shown.
The devices in power system shown in Figure 2 have the following ratings: G1 : 100 MVA, 13.8 kV grounded Y, X” = 0.15 pu, X2 = 0.015 pu Xo = 0.05 pu G2 : 50 MVA, 20.0 kV grounded
Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC. (B) bakelite. (C) Polyester. (D)
series and parallel circuit
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