A switchgear is a combination of secured control and metering types of equipment. Based on the kinds of applications, like motor protection, measurements, rail track purposes, etc., switchgears are found in many different forms. Furthermore, based on voltage level, as well as economic viability, switchgear can be the indoor or outdoor type.
Indoor switchgear, also known as MV switchgear, is usually used for medium voltages and is housed in a grounded metal enclosure. Medium voltages are defined as voltages ranging from 3 to 36 kV. Indoor switchgear has, however, recently been successfully used for high voltages greater than 36 kV.
In this blog, we’ll put light on the design, advantages, and disadvantages of a switchgear. Let’s get started!
Switchgear Design: A brief overview
In comparison to the air-insulated system, the gas-insulated system, or GIS, is used for outdoor switchgear. GIS is most useful in areas where land is more expensive and the air is dusty. Also, a switchgear is mostly encased in a grounded metal cage on all sides for switchgear inspections and ventilation.
Switchgears are insulated in a gas environment. SF6 gas has super dielectric properties; therefore, it is used for insulation purposes. The metal enclosure around the switchgear offers safety.
Indoor switchgear is of two types in terms of switching and metal enclosure partitioning, i.e., metal-clad indoor switchgear and metal-enclosed indoor switchgear.
In metal-enclosed type, the switchgear arrangements are enclosed on all sides and metal sheets contain the principal interruption devices and fuses, as well as all other pieces of equipment. The interior of the enclosure is accessible through the doors and detachable covers. For the most effective outcomes, look into the greatest switchgear manufacturers!
In metal-clad type, the circuit breakers are vacuum-insulated and may be removed or dragged out. The grounded materials separate the metering instruments one by one. The metal-clad Switchgear’s voltage levels range from 4.76 kV to 38 kV, with main bus continuous price ratings of 1.2kA, 2kA, 3kA, and 4kA.
Each metal-clad Switchgear is, in general, constructed of metal and encased. All metal-enclosed Switchgear is not metal-clad Switchgear. It is built in a much more straightforward manner. Metal-clad Switchgear is more beneficial than metal-enclosed Switchgear since the former is more configurable.
Advantages of switchgear
The indoor switchgear system offers the following advantages as compared to outdoor switchgear-
- Safer and reliable.
- It takes up less room than an outdoor system.
- Maintenance and durability are easier to achieve.
- Operating costs are less.
- Grounded metal enclosures reduce the risk of electrocuting.
- More security.
- Environmental circumstances are less of a factor.
Disadvantages of indoor switchgear
The major drawback of indoor switchgear over outdoor switchgear is the greater cost of installation. In addition, because to cost considerations and at high voltages, the outside or air-insulated system becomes more economically viable.
Indoor switchgear systems are extremely dependable, safe, and cost-effective. In comparison to their outdoor counterparts, they are also very adjustable and long-lasting. They also have the ability to tolerate the effects of the environment. As a result, the economic feasibility and high voltage levels of interior switchgear systems may limit their use. Are you seeking for the Switchgear’s fixation? Find the top Switchgear manufacturing business at the most affordable pricing.