Air switches are classified as air-break switches and isolators (or disconnect switches). (i) Air-Break Switches: The air-break switch has both the blade and the contact equipped with arcing horns. Arcing horns are pieces of metal between which the arc resulting from opening a circuit carrying current is allowed to form. As the switch opens, these horns are spread farther and [...]
In this article we will discuss about:- 1. Types of Switches 2. The Essential Qualities of a Switch 3. Positions. Types of Switches: i. Quick Break Knife Switch: This type of switch is generally used on the main switch board of a low voltage circuit. Fig. 76 shows a double pole quick break knife switch. The switch consists of one, [...]
In this article we will discuss about the use of various types of switches for domestic and commercial purposes. Use of Single-Pole and Double-Pole Switches: A single-pole switch may be used in a circuit in which normally the current does not exceed 5 amperes. Where the current exceeds 5 amperes, the practice is to use a double-pole switch there. When [...]