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Title: Transient Lightning Protection For Electronic Measurement Systems
Author: Dan Mccreery
Source: 2008 International School of Hydrocarbon Measurement
Year Published: 2008
Abstract: Energy supply is now a critical part of todays economy. This fact places increasing demands of reliability and availability on the control systems we use in this industry. Maximum availability and system reliability is mandated for both safety and maximum profitability. While considerable effort is expended in the evaluation of methods to improve processes, many engineers have yet to grasp the threat lightning and surges pose to modern control systems. As we have moved from analogue to digital control, from TTL to IC logic, our instrumentation and control equipment have become much more sensitive to voltage spikes. TTL components could sustain damage from an impulse with as little energy as 10J. Todays IC logic can be damaged from an impulse with as little as 1J of energy. It is very important that the protective systems we use today are designed to address todays modern and more sensitive equipment as well as the higher demands for improved uptime and reliability.

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