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Over-Voltage Protection

The Critical Differences Between Spark Gaps And DC Decouplers

This paper provides an overview of why over-voltage protection on isolation joints is needed as well as a brief description of the two most common protection technologies: spark gaps and solid-state DC decouplers. It offers a detailed explanation of the limitations of spark gaps for use as over-voltage protection devices on pipelines and explains why properly rated solid-state devices should be used in place of spark gaps for most pipeline applications.

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