Preventing leakages at insulators, Electrical Engineering

Preventing Leakages at Insulators

Leakages at insulators, cracking of insulators and flashover across insulators frequent cause outages and give output in loss of revenue. Pollution is a major cause for this damage. Because of pollution a deposit is created on the insulator surface. The surface layer might absorb moisture and become semi-conducting causing leakage currents to flow. The surface gets heated and leads to an avalanche causing a flashover and cracking of insulator.

Use of appropriate material for insulators (like porcelain, glass and etc. depending on the nature of pollution in the local area) and designed protected creepage path helps in decreasing insulator failure. Preventive actions are regular inspection and hot line washing, the latter being particularly appropriate for coastal areas and areas along with chemical industries.

Posted Date: 2/6/2013 5:31:28 AM | Location : United States







Related Discussions:- Preventing leakages at insulators, Assignment Help, Ask Question on Preventing leakages at insulators, Get Answer, Expert's Help, Preventing leakages at insulators Discussions

Write discussion on Preventing leakages at insulators
Your posts are moderated
Related Questions
Q. What do you eman by Digital Circuits? The use of nonlinear devices (BJT and FET) in constructing linear amplifiers. Although these devices are inherently nonlinear, their op

A three-phase transposed line is composed of one conductor per phase with flat horizontal spacing of 11 m as shown in Figure 1(a). The conductors have a diameter of 3.625 cm and a

Explain graphic adapter and monitor. Video card changes digital output from the computer in an analog video signal and sends the signal by a cable to the monitor also termed a

Q. With suitable example differentiate between accuracy and precision.  Sol. Accuracy :  Accuracy is the closeness with which instrument reading approaches the true value of

role of trigger circuit in cro

For a discrete time unit step input x(kT), the output  y(kT) of a system is shown below,   Part (a)  Obtain the Z-transform of the output signal y(kT).   Part (b)   F

Consider the common-emitter BJT circuit shown in Figure (a). The static characteristics of the npn silicon BJT are given in Figure (b) along with the load line. Calculate iB for v

Q. The radiation pattern of a half-wave dipole antenna is given by (a) Sketch the radiation pattern in the principal plane of xz containing angle θ. (b) Determine the beam wi

Q. An op amp has an open-loop frequency response as shown in Figure. (a) Find the approximate bandwidth of the circuit using this op amp: (i) With a closed-loop voltage gain

NAND Gate NAND   means NOT AND  it complements  the output  of an AND  gate. The symbol  of NAND  by a NOT  gate.  Generally Not  operation  is represented by a bubble as shown