Strategies For Proper Connection Of Surge Arresters And Grounding Systems: Methods To Improve Electrical Stability
In power systems, the connection between lightning surge arrester and the grounding system directly affects the operating status and safety level of equipment. After installation, the connection between the surge arresters and the grounding system must meet the requirements of conduction stability, impedance matching, and mechanical strength. Any looseness or poor contact may cause the 11kv lightning arrester equipment to fail, thereby affecting the overall lightning protection performance of the power facility.
Surge Arrester Grounding Path Design
The grounding path design of surge arresters needs to consider a reasonable layout of multi-point grounding and single-point grounding.
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Grounding Wire Selection: Use low-impedance conductors to ensure that the surge arrester's current-carrying capacity matches the system grounding.
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Grounding Location Arrangement: The connection point between the surge arrester and the grounding system should be close to the protected equipment to reduce line resistance.
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Connection Method: Welding, crimping, and bolt tightening methods must comply with standards to maintain long-term stability.
This meticulous arrangement can provide a low-impedance path during a lightning strike, allowing the surge arrester to perform at its designed level.
Maintenance Requirements for Surge Arrester Connections
During long-term operation, the connection status between the surge arrester and the grounding system needs to be checked regularly. Corrosion, oxidation, or loose bolts can all increase grounding resistance and affect the surge arrester's response. Quantitative assessment can be performed using a grounding resistance meter, while a physical inspection of the grounding conductor is conducted to ensure a continuously reliable connection.
