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HV AC generation:
(1) A high voltage testing laboratory is required to test apparatus with a capacitance of the order of 2000pF which is used in a 230kV system. If the test voltage requirement is 2.2 times the system rated voltage, determine the power rating of the test transformer at 50 Hz operation.
(2) A 100kVA, 250V/200kV testing transformer has 5% leakage reactance and 1% resistance on 100kVA base. A cable has to be tested at 400kV using the above transformer as a resonant transformer at 50Hz. If the charging current of the cable at 400kV is 0.5A, find the series inductance required. Assume 1% resistance for the inductor to be used and the connecting leads. Neglect losses for the cable. What will be the input source voltage to the primary of the transformer?
(3) A simple series resonance power supply is used for testing a high voltage bushing, which can be treated as a pure capacitive load of 2000pF. The required test voltage is 15kV at 5kHz, when the system operates under resonance, using an inductor of high-quality factor, Q = 14. Calculate the output voltage rating of the power supply (excitation voltage), and the value of the inductance at 5kHz.
From a point source inside the ocean we generate a sound wave. This wave propagates isotropically (the same in all direction, spherical wave) with frequency of f= Hz. The amplitude of the wave at m from the source of the sound is Sm=m.
Find the appropriate subchannel modulation format (note: the number of constellation points in the modulation mapping scheme should be the power of two).
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A battery is charged. The relationship between the charging current, i amperes and the time, t hours passed, is given by the formula:
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A system consists of three components in series, each with a reliability of 0.935. A second set of three components is purchased and a redundant system is built.
a two port network has the y parameter y1110 y12-20 y222 all in milli mhos find the new y parameter if a 100ohm
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How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation ?
A simple power system consists of a dc generator connected to a load center via a transmission line. The load power is 100kW. The transmission line is 50km copper wire of 3 cm in diameter. If the voltage at the generator terminals is 400V
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