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Q. Three single-phase 100-kVA, 2400:240-V, 60-Hz transformers (each ofwhich has an equivalent series impedance of 0.045+j0.16 referred to its low-voltage side) are connected to form a three phase, 4160:240-V transformer bank, which in turn is connected to a three-phase feeder with an impedance of 0.5 + j1.5 /phase. When the three-phase transformer bank delivers 250 kWat 240Vand 0.866 lagging power factor, determine:
(a) The transformer winding currents.
(b) The sending-end voltage (line to line) at the source.
Find the resonant frequency: Find the resonant frequency ω0 (or f0) for the given series RLC circuit v = Vm sin ωt = 50 sin ωt Figure Also determine the expre
Armature Winding In this winding the working emf is induced by the working flux. The current which is dependent on the load called current. The windings that handle
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Q. Describe Common-Mode Rejection Ratio ? When there is a common-mode input voltage, i.e., when the input signals are equal and greater than zero, the output voltage of an idea
A 3-kVA, 220:110-V, 60-Hz, single-phase transformer yields these test data: • Open-circuit test: 200 V, 1.4 A, 50 W • Short-circuit test: 4.5 V, 13.64 A, 30 W Determine th
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Testing of CT Operated Meters The subsequent tests should be carried out for CT operated meters: i) Ratio test through primary injection kit, ii) Polarity test, iii)
A selection form an application's menu, or a command typed in by the user, like at a DOS prompt or at the Run dialog box in Windows.
Competition and Non-conventional energy: Competition: The tariff policy bolsters competition through making it mandatory for a distribution licensee to procure power by
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