Challenge
In the Netherlands, saltwater contamination poses a significant challenge for transmission line insulators. Much like the U.S. Pacific Northwest, the Dutch coastal climate is characterised by persistent fog and mist, often laden with high levels of salt particles from the nearby North Sea. When deposited on the insulator surface, this salt increases conductivity, which can lead to insulator failure and flashover.
Solution – Advanced Steep Shed Design
To combat this, Dutch utilities have adopted advanced insulator designs tailored to high-contamination environments. One of the most effective solutions in use is the LAPP Porcelain Long Rod insulator featuring a steep shed design. These insulators are specifically engineered to resist the accumulation of moisture, which is crucial in preventing the formation of continuous conductive paths along the insulator’s surface.
The steep shed profile of LAPP Long Rods plays a critical role in maintaining reliable operation. By creating a sharply angled surface, the design encourages water to run off quickly, minimizing the time moisture remains on the insulator. This not only limits the buildup of contaminants but also significantly increases the creepage distance, further minimizing the likelihood of electrical discharge in polluted conditions.
Additionally, the use of porcelain provides excellent mechanical strength and long-term resistance to environmental degradation. Unlike some polymeric alternatives, porcelain maintains its structural and insulation properties over decades of use, even in highly corrosive marine climates.
Outcome
By integrating LAPP Porcelain Long Rods with steep shed designs, Dutch utilities are able to uphold the reliability and safety of their electrical transmission and distribution systems, even under the persistent threat of salt-laden coastal fog.
Speak to a LAPP engineer today to discuss how Porcelain Long Rods could help to solve your transmission line insulation challenges.