Hidden Killers In Humid Environments: Hidden Dangers Inside Surge Arresters
Some lighting arrester 11kv may appear to be working perfectly, but they may inexplicably experience a breakdown failure. The real culprit is often not the excessively strong lightning current, but rather the minute amounts of moisture invisible to the naked eye. When moisture seeps into the equipment, components originally intended to protect the circuitry become the source of disaster.
How does moisture induce short circuits?
Poor sealing or long-term aging allows moisture from the environment to penetrate. Once this moisture enters the interior of lighting arrester 33kv, it will form a very thin water film on the surface of the zinc oxide resistor or insulating support. This seemingly insignificant film can drastically alter the internal electric field distribution.
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A surge in electrical current: Moisture directly causes a precipitous drop in the insulation performance of the resistor.
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Partial discharge phenomenon: Uneven distribution of the water film induces strong local electric field distortion.
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A vicious cycle of thermal collapse: Increased current generates heat, which further causes the moisture to expand and become compressed, ultimately leading to complete breakdown.
Common Causes of Sealing Structure Failure
The tightness of equipment at the factory cannot last a lifetime. Over years of exposure to sun and rain, the lightning arrester 20 kv seal will gradually harden and crack.
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Temperature and Pressure Differences: The "breathing effect" created by the alternation of day and night draws in humid air from the outside.
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Insufficient Installation: Overly tight or loose connections at the terminals can create pathways for moisture.
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Natural Material Wear and Tear: As the sealant ages, the moisture barrier becomes ineffective.
Detection Approach for Internal Moisture Ingress
Instead of waiting for a problem to occur before replacing it, it's better to detect moisture before it causes a major disaster. Many online monitoring methods exist; There are many online monitoring methods available now, so you can pay close attention to the total current changes of the lightning arrester 22kv. If you find an abnormal increase in the resistive current component, it is basically a signal of internal moisture. Regularly performing infrared imaging scans on the lightning arrester 24kv can also be very helpful, as damp areas usually show obvious abnormal heating. With this solid data feedback, we can intercept the lightning arrester 24kv 10ka at the edge of failure before it short-circuits.
