lightning arrester
Học thuậtThân thiện
Definition
Noun: * A protective electrical device installed in a power line or on equipment to divert dangerously high-voltage surges, such as those from a lightning strike, safely to the ground, thereby preventing damage to connected machinery, appliances, or wiring.
Usage
The term "lightning arrester" is used to describe a specific component in electrical safety systems. It is a technical noun. * It is typically discussed in contexts involving electrical engineering, power distribution, infrastructure protection, and building safety. * It functions as a safeguard, not as a primary component of normal electrical flow.
Examples
- The utility company installed a new lightning arrester on the main transformer to protect the neighborhood's grid.
- For safety, the radio tower is equipped with a robust lightning arrester.
- The engineer checked the lightning arrester after the severe thunderstorm to ensure it had functioned correctly.
Advanced Usage
- Placement: Lightning arresters are often found at points where power lines enter a building, on telephone lines, and on sensitive electronic equipment.
- Function vs. Rod: A "lightning arrester" deals with surges in electrical conductors, while a "lightning rod" is a physical mast designed to attract a lightning strike and direct its current safely into the ground. They are related but distinct protective devices.
Variants and Related Words
- Surge arrester: A more general term often used interchangeably with "lightning arrester," though it can also protect against surges from sources other than lightning (e.g., switching surges in the power grid).
- Surge protector: A common term for devices (especially consumer-grade power strips) that protect electronic equipment from voltage spikes. These often incorporate arrester technology on a smaller scale.
Synonyms
- Surge diverter
- Lightning protector (less technical)
- Transient voltage surge suppressor (TVSS) - a more precise modern term for the technology.
Related Phrases/Concepts
- Grounding / Earthing: The essential practice of providing a path for electrical current to flow safely into the earth, which is the final destination for the surge diverted by the arrester.
- Overvoltage protection: The general category of safety measures that includes the use of lightning arresters.
Noun
- electrical device inserted in a power line to protect equipment from sudden fluctuations in current