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Introduction to the research on lightning protection of vortex flow sensor

Frequently, companies are subject to lightning strikes caused by installed vortex flow sensors, causing damage. Lightning is a common phenomenon in nature, so we have to find ways to eliminate its impact on the flow sensor. First let's take a look at how lightning affects the sensor:
First, the lightning enters the burnout sensor through the power supply.
Second, the lightning generated by the powerful magnetic field instrument electronic components to generate magnetic induction, instantaneous generation of strong voltage and current, breakdown of the insulation burnout sensor.
Third, the lightning pulse wave invades the flow sensor through the wireless network to burn out the communication chip or sensor.
Lightning protection should be based on the site environment, and a lightning protection scheme cannot be adopted in general. Commonly used lightning protection schemes include:
1. External lightning protection. Including lightning rods, lightning protection belts, down conductors, grounding poles, etc.
2. Internal lightning protection. Install a suitable lightning arrester on the front end of the equipment to be protected so that the equipment, the line and the earth form a conditional equipotential body.
These two lightning protection schemes complement each other. The external lightning protection system protects the building body from lightning strikes, while the internal lightning protection prevents damage caused by inductive lightning and other forms of overvoltage intrusion into the equipment.
If the flow sensor is damaged, it is best to check if the lightning rod is installed. If it is, check if the grounding resistance is qualified. If the flow sensor is connected to the pipe flange, check if the grounding screw of the internal amplifier board is Connected, the outer casing can be connected to the pipe flange bolt by a copper wire alone, and then the cable is incoming. The outer protective pipe and the connecting metal hose end must be screwed into the wire hole with the ferrule; In addition, a surge protector can be added to the front end.
It is also necessary to explain that the lightning protection measures are not taken into account when the sensor is installed, and the work is over. Regular installations of the installed vortex flow sensors are also required before the annual thunderstorm season. If the grounding resistance value is found to vary greatly, the grounding system should be thoroughly inspected and the grounding pile can be replenished if necessary. If the conductors of each part of the lightning protection device are broken or rusted by corrosion or other reasons, they must be replaced. In addition, it is necessary to check the soil around the grounding device for any subsidence.
The lightning protection of the sensor is a system work, and it is not possible to omit which part of it because of sloppy. The damage caused by lightning to the flow sensor is permanently unrecoverable, which directly affects the safe operation of the production, which is particularly significant for manufacturers of continuous production.

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