Porcelain Lightning Arrester
A porcelain lightning arrester is a device used to protect electrical equipment from damage caused by lightning strikes. It is made of porcelain, which is a non-conductive material that is resistant to heat and shock. The porcelain lightning arrester works by diverting the high-voltage current from the lightning strike to the ground, where it can be safely dissipated.
Description
Porcelain Lightning Arrester
Features
- High-voltage protection: They can withstand voltages of up to 1 million volts.
- Durable construction: They are made of durable materials that can withstand harsh weather conditions.
- Low maintenance: They require little or no maintenance.
- Long lifespan: They can have a lifespan of 20 years or more.
Applications
Porcelain lightning arresters are used in a wide variety of applications, including:
- Power transmission and distribution systems: They are used to protect transformers, substations, and other power equipment from lightning strikes.
- Industrial facilities: They are used to protect industrial equipment from lightning strikes.
- Commercial buildings: They are used to protect commercial buildings from lightning strikes.
- Residential buildings: They are used to protect residential buildings from lightning strikes.
Benefits of Using Porcelain Lightning Arresters
There are many benefits to using porcelain lightning arresters, including:
- Reduced risk of equipment damage: They can help to reduce the risk of damage to electrical equipment caused by lightning strikes.
- Improved safety: They can help to improve the safety of people and property by protecting electrical equipment from lightning strikes.
- Reduced downtime: They can help to reduce downtime caused by lightning strikes.
- Lower maintenance costs: They require little or no maintenance, which can help to save money on maintenance costs.
Parameters
| Parameter | Value |
| Voltage rating (kV) | 10 to 500 |
| Current rating (kA) | 5 to 20 |
| Impulse withstand voltage (kV) | 150 to 650 |
| Switching surge withstand voltage (kV) | 200 to 800 |
| Frequency withstand voltage (kV) | 10 to 30 |
| Creepage distance (mm) | 250 to 1000 |
| Insulation resistance (MΩ) | 1000 to 10000 |
How to Choose the Right Porcelain Lightning Arrester
When choosing a porcelain lightning arrester, it is important to consider the following factors:
- Voltage rating: The voltage rating must be equal to or greater than the voltage of the electrical system it will be protecting.
- Current rating: The current rating must be equal to or greater than the expected lightning strike current.
- Impulse withstand voltage: The impulse withstand voltage must be equal to or greater than the expected impulse voltage.
- Switching surge withstand voltage: The switching surge withstand voltage must be equal to or greater than the expected switching surge voltage.
- Frequency withstand voltage: The frequency withstand voltage must be equal to or greater than the expected frequency withstand voltage.
- Creepage distance: The creepage distance must be sufficient to prevent flashover.
- Insulation resistance: The insulation resistance must be high enough to prevent leakage current.
