How smart instrumentation lightning protection1

As the demand of the development of industrial automation, intelligent instrument and meter industry rapid development, but the internal application of micro electric parts of intelligent instruments and meters, but in most low dielectric strength, low resistance to surge capacity problem. Intelligent instrument of lightning protection, therefore, it is very important, especially in thunderstorm season, so as not to cause great losses. So how intelligent instrument effective lightning protection?

smart instrumentation lightning protection, should start from two aspects, including the external lightning protection system with the internal lightning protection system, general mainly accomplished by joining lightning protection device. Through the following methods for lightning protection.

1, the lightning protection to start from the ground system. Instrument chassis, especially such as control cabinet, work station, power cabinets, chassis with a flat together. Instrument work such as negative 24 v power supply and instrumentation signals, computer input and output signal, etc are linked together to form equipotential. The Ann, safety barrier, gelizha, earthing safety instrument signal reference points which should be considered when the connection is a equipotential.

2, can't ignore the power supply prevents thunder protection of intelligent instruments and meters. Install anti surge protection system for intelligent instrument and meter or surge protector to ensure that the instrument can't more than pressure limit. Surge protector can induction to the thunder surge in thunderstorm weather, the overload current into the earth.

3, for surge, intelligent instrument and meter setting signal channels can not only guarantee the accuracy of the information transmission, stable, flexible, and can in thunderstorm weather, drain spare piezoelectric rushed to the earth, and ensure the safety of the signal transmission.

4, on a regular basis for intelligent instrument of power supply system grounding, bus-bar, surge, power supply, grounding system for inspection and maintenance, such as thunder grid as well as the change in time.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor