Question

The recommended creepage distance for insulator in heavily polluted area are

Answer 1

Explanation:

Creepage is the shortest path between two conductive parts (or between a conductive part and the bounding surface of the equipment) measured along the surface of the insulation. A proper and adequate creepage distance protects against tracking, a process that produces a partially conducting path of localized deterioration on the surface of an insulating material as a result of the electric discharges on or close to an insulation surface. The degree of tracking required depends on two major factors: the comparative tracking index (CTI) of the material and the degree of pollution in the environment. Used for electrical insulating materials, the CTI provides a numerical value of the voltage that will cause failure by tracking during standard testing. IEC 112 provides a fuller explanation of tracking and CTI. Tracking that damages the insulating material normally occurs because of one or more of the following reasons:

Humidity in the atmosphere.

Presence of contamination.

Corrosive chemicals.

Altitude at which equipment is to be operated

Answer 2

Answer:

q = cv

so, v=q/c

now the capacitor is charged and disconnected hence q remains constant

so, we get our proportionality as,

v inversely proportional to c

now c inversely proportional to the distance between the plates

hence increase the distance between the plates decreases the capacitance

and as a result increases the voltage...