Lightning protection method for instrumentation

With the development of industrial automation instrumentation industry is also in rapid development, the application of instrumentation is also very extensive, in many industries have a very important role. There is also a very important problem in the use of instrumentation, that is lightning protection. The lightning protection of instrumentation mainly starts from two aspects: the lightning protection of the external system and the lightning protection of the internal system. The following Xiaobian will introduce the lightning protection method of instrumentation.

1. Lightning protection begins with the grounding system. Instrumentation cabinets, especially control cabinets, consoles, power cabinets, etc., the cabinets must be connected together with flat steel. Instrument power supply such as 24V negative terminal and instrument signal ground, computer input and output signal ground and other connected to constitute equal potential. Grounding of safety, safety barriers, isolation barriers, safety devices, etc. must also consider whether or not the isopotential is formed when the instrument signal reference point is connected.

2, can not ignore the smart instrumentation power supply lightning protection. Install an anti-surge protection system or surge protector for smart instruments to ensure that the instrument will not exceed the pressure limit. Surge protectors can sink overcurrent into the earth when a thunderstorm triggers a surge.

3. Setting up signal channel surges for intelligent instruments and meters not only ensures accurate, stable, and flexible information transmission, but also enables the discharge of piezoelectric surges to the earth during thunderstorms to ensure the safety of signal transmission.

4. Regularly check and repair the power system ground, bus bar, grounding body, surge absorber, and lightning protection grid of smart instrumentation, and replace them in time.