Isolating Media
In addition to the different voltage levels, switchgear may also differ in isolating media used to protect energized devices from electrical faults. The switchgear enclosure may make use of various insulators with different dielectric properties or other characteristics.
Air
Although the least expensive insulation option, air has a low dielectric strength, making it a relatively poor insulator. As a result, air-insulated devices are typically larger than devices insulated by other media.
Fluid
Fluid offers better insulation when compared to air and is similarly inexpensive. Fluid also provides the added advantage of cooling for overheated systems.
Gas
Pressurized gas also offers increased dielectric strength compared to standard air insulation. Although Sulfur Hexafluoride is a common insulating gas for switchgear systems, other gases may be used in its place.
Oil
Oil has a high dielectric strength and may also provide increased cooling benefits.
Solid
Although less common and more expensive than some other options, solid, non-conductive materials can provide exceptional dielectric strength, as well as resistance to chemical and thermal deterioration.
Switchgear vs. Switchboard
The term “switchgear” is sometimes used synonymously with “switchboard.” However, these two types of equipment vary by how they are constructed.
Switchgear features compartmentalized construction to limit arcing risks from inadvertent contact with energized equipment. Compartmentation is not required in a switchboard, enabling greater configurability and more equipment to be installed in each frame.
Read more about the UL Standards for Paralleling Switchgear here.
Switchgear Solutions from ASCO
ASCO Power offers sophisticated switchgear solutions for paralleling power sources and controlling mission-critical power.
ASCO Power Control Systems provide flexibility for the widest range of power control applications by integrating:
Comprehensive connectivity options supply data to remote touchscreens and power management systems.
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