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- เผยแพร่เมื่อ 17 ต.ค. 2024
- A surge arrester, also known as a surge protector or lightning arrester, is a device designed to protect electrical and electronic equipment from voltage spikes or surges in electrical power. These surges can be caused by lightning strikes, power outages, or other electrical disturbances. Here are more details about surge arresters:
1. *Functionality:*
*Voltage Regulation:* Surge arresters work by limiting the voltage that reaches connected devices, preventing it from exceeding a certain threshold.
*Diverting Surges:* When a surge occurs, the surge arrester diverts the excess voltage to the ground, protecting the connected equipment.
2. *Types of Surge Arresters:*
*Station Class Surge Arresters:* These are larger surge arresters used in high-voltage power systems, such as electrical substations.
*Distribution Class Surge Arresters:* Designed for use in medium-voltage power distribution systems.
*Secondary Surge Arresters:* Used at the service entrance or near sensitive electronic equipment to provide localized protection.
3. *Components:*
*Metal Oxide Varistor (MOV):* The core component of many surge arresters, the MOV is a semiconductor device that conducts electricity when voltage exceeds a certain level.
*Enclosure:* Surge arresters are housed in protective enclosures that shield them from environmental factors.
4. *Installation:*
Surge arresters are typically installed at points where power enters a building or facility, providing protection to the entire electrical system.
5. *Applications:*
*Residential:* Used to protect appliances, computers, and other electronic devices from voltage spikes.
*Industrial:* Employed in manufacturing plants and industrial facilities to safeguard machinery and control systems.
*Power Distribution Networks:* Installed in electrical substations to protect transformers, switchgear, and other equipment.
6. *Maintenance:*
Surge arresters can degrade over time, especially if they experience multiple surges. Regular inspection and, if necessary, replacement are essential for maintaining effectiveness.
7. *Considerations:*
Surge arresters do not provide continuous protection but respond to transient events.
The selection of a surge arrester depends on the specific application and the voltage level of the electrical system.
Always follow manufacturer recommendations and local electrical codes when installing surge arresters to ensure proper protection and compliance with safety standards.
Lightning arresters, also known as surge arresters or lightning protection systems, play a crucial role in safeguarding electrical and electronic systems from the destructive effects of lightning strikes and voltage surges. Here are the key importance and benefits of lightning arresters:
1. *Protection Against Lightning Strikes:*
The primary purpose of lightning arresters is to protect structures and equipment from direct lightning strikes. By providing a low-resistance path to the ground, they help dissipate the enormous energy associated with a lightning strike, preventing damage to electrical systems.
2. *Prevention of Equipment Damage:*
Lightning surges can cause severe damage to sensitive electronic equipment, appliances, and electrical systems. Lightning arresters help prevent damage by diverting the excess energy from a lightning strike away from the connected equipment.
3. *Minimization of Downtime:*
Electrical systems in industries, data centers, and critical infrastructure are vulnerable to lightning-induced surges. Lightning arresters help minimize downtime by protecting these systems from disruptions caused by equipment damage or failure.
4. *Fire Prevention:*
Lightning strikes can cause electrical fires due to the intense heat generated during a strike. Lightning arresters mitigate this risk by reducing the chances of equipment damage, thereby contributing to fire prevention.
5. *Protection of Power Distribution Systems:*
Lightning arresters are commonly installed in power distribution networks, including substations and power lines. This protects transformers, switchgear, and other critical components, ensuring the reliability of the power distribution system.
6. *Safety of Personnel:*
Lightning arresters contribute to the safety of individuals within a structure by minimizing the risk of electrical shock or injury resulting from lightning-induced electrical failures...
In summary, lightning arresters are essential components in ensuring the resilience, safety, and reliability of electrical and electronic systems in the face of unpredictable and potentially destructive lightning events.
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