Thunder and lightning, as the natural world in the famous "temper", its power can not be underestimated, it is reported that the voltage of lightning can be as high as 100 million volts, and for our human body, the safety voltage is only thirty-odd volts, the voltage of the thunder and lightning can be a person's safety voltage of several million times! And the peak discharge current of lightning can be as high as dozens of kiloamps, or even hundreds of kiloamps, while the human safety current is only dozens of milliamps. Specifically, lightning can not only flash objects in an instant and cause forest fires, but can also threaten the safety of various aviation and spacecraft, and can even kill people.
Next, let's talk about why the power grid needs lightning protection. The towers of transmission and distribution lines are ten to tens of meters above the ground, exposed in the wilderness or high mountains, and the length of the lines sometimes reaches hundreds of kilometers, so the chances of being struck by lightning are high. When lightning strikes a wire, the current will travel along the wire to the inside of the building, which may cause damage to electrical appliances and even lead to safety accidents such as fires. Therefore, the power grid must have reliable lightning protection measures to ensure the safety of line power supply.
As for the necessity of adding a lightning arrester, it is even more obvious. Lightning arrester is a kind of important electrical equipment used to protect electric equipment and power system. Lightning arrester can play a protective role when the voltage transient caused by lightning weather or other reasons. By grounding or diverting, voltage transients exceeding the equipment's withstand voltage level are directed to ground, thus protecting the equipment from damage. In places such as residential and commercial buildings, lightning arrester should be added to the power system, so it becomes important to monitor the working condition of lightning arrester in real time.
Shenzhen DX Wisdom TechnologyDX-WPS100-BL< Strong>Surge arrester online monitoring system monitoring parameters including full current, resistance current and action times, etc., can overcome the temperature and humidity, dirt and other factors of interference, can effectively and accurately monitor the arrester's operating conditions, with the use of the arrester leakage current to take the energy, without the need to use the power board and lithium battery power supply mode, to truly realize the passive detection. Passive detection.
