How many types of switch gear?

Answer 1

There are several different types of switchgear power systems and each have their own unique characteristics to meet the specific needs of the system and its location.

A very effective form of switchgear power systems is a gas insulated switchgear (GIS) system. In this type of system, conductors and contacts are insulated by pressurized sulfur hexafluoride gas. While effective, it is very expensive, however. Other common switchgear power systems include oil insulated and vacuum switchgear.

A circuit breaker is also an important part of switchgear power systems and their safety and function. A circuit breaker that is housed within switchgear power systems enclosures is a primary component that can interrupt fault currents. A circuit's arc is quelled when the circuit breaker pulls apart the contacts and disconnects the circuit. The design of this system requires careful consideration regarding how and where it will be utilized. Generally speaking, circuit breakers fall into four major categories; oil, gas, vacuum and air.

Answer 2

Gear Types

Here is a brief overview of the most popular gear types:

• Spur Gear: characterized by their straight cogs, these gears are mounted on parallel shafts. You'll find examples of spur gear trains in watches and clocks.

• Bevel Gear: characterized by cogs cut in a cone shape. The gear shafts are generally mounted at 90º angles to each other.

• Worm Gear and Wheel: a gear comprised of a wheel gear with inclined cogs that is rotated by a screw thread (a single-cogged gear called a worm).

• Helical Gear: characterized by cogs that are cut at an angle to the face of the gear. Can be mounted perpendicularly or parallel. Automobile transmissions make use of these gears.

• Internal Gear: an inside out gear. A small gear is set within a larger gear that has its cogs on the inside. This setup protects the cogs of the gears from contaminants.