With the development of industrial automation instrument industry is also rapid development, the application of instrumentation is also very extensive, in many industries have a very important role. Instruments in use there is a very important issue, that is, lightning protection. Lightning instrumentation mainly from two aspects to start the external system lightning protection and internal system lightning protection, the following Xiaobian to specifically introduce the instrument lightning protection method.
1, lightning protection from the grounding system to start. Instrument chassis, especially like control cabinets, console, power cabinet, etc., the cabinet should be connected together with flat steel. Instrument working power such as 24V negative terminal and instrumentation signal, the computer input and output signals are connected to form equal potential. Intrinsically safe, barrier, barrier, safety devices such as grounding should also consider whether the instrument signal reference point connected to form the equipotential.
2, can not ignore the intelligent instrumentation power lightning protection. Install a surge protection system or surge protector for smart instrumentation to ensure the instrumentation does not exceed the voltage limit. Surge protector can sense the surge in the thunderstorm surge, the overload current into the earth.
3, set the signal channel for smart instrumentation surge, not only to ensure accurate, stable and flexible delivery of information, but also in the thunderstorm weather, overpressure surge to the earth, to ensure the safety of signal transmission.
4, on a regular basis intelligent power supply system instrumentation grounding, bus bars, grounding, surge, lightning protection and other inspection and maintenance, and timely replacement.
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