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Define Cables - Generation and Absorption of Reactive Power?
It is well known that the shunt capacitance of the cable is very large as compared to that of an overhead line. This is because the phase conductor of a cable is very close to the outer earthed metallic sheath. Hence, cables are generators of reactive power. For example, a 275 kV, 240 MVA cable produces 10 to 12 MVAr per mile and a 33 kV cable produces 0.2 MVAr per mile. Consequently they are not used for long a.c. transmission.
What is the effect of overheating on the life of an electric insulator? An insulator is designed to withstand amount of heat. However, when an insulator is overheated so dielec
a) A 230 V/25V, 50 HZ transformer with a rated primary current of 1,2 Amps is used to supply a number of 25 V, 30 Watt halogen light bulbs. Assuming an ideal transformer and that
what are the grond clearance for 220KV overhead transmission lines?
What are CU and NEU in 8087? CU-Control unit NEU- Numeric extension unit. The numeric extension unit implements all the numeric processor instructions whereas the control un
in industry
Mention the desirable properties of fuse materials. A fuse material must possess the properties as follows: Low resistivity - It means, thin wires can be used that will of
Complete Instruction Set of 8085 Microprocessor There are total 256 instructions in 8085 microprocessor. These instructions are classified into seven categories according
You have to look up the data sheets for the LM317 (Not LT317), LT1006. V1 is a standard 9 volt battery, and the resistors are “through hole”. Label the test points in, V+, gnd, and
Fast Recovery diodes The fast recovery diodes low recovery times. These diodes are manufactured by diffusion. They are used in converter circuits where the speed of reco
(a) For a series RLC resonant circuit, find an expression for the voltage across the resistance VR and obtain the ratio V R /V S , where V S is the applied voltage. Identify the e
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