Everyone uses them every day in their daily lives. But if asked: What are touch working voltage, step voltage and working voltage? Why is the electricity meter still spinning when there is no electricity consumption? Why can the accumulation of static electricity cause fire accidents? In this case, many people just can't respond. Here's a wave of super useful knowledge about electricity consumption right away. Why switch power supplies for electrical products
The power plug is usually a three-power plug
The key purpose of using three-hole power cord plugs in electrical products, especially those with plastic casings, is to better prevent electrical leakage. When the three-hole power cord plug is plugged into the power plug, it is respectively connected to the live wire, the neutral wire, the neutral wire and the wire connector. The live wire and neutral wire ensure the normal application of all electrical products. The wire joints are grounded for protection. When electrical appliances discharge electricity, the current will be conducted into the ground along with the grounding system, thereby protecting the user and preventing safety accidents. Why is there no electricity consumption
The main reasons for the situation where the electricity meter is still rotating are as follows :(1) Although the electrical appliances are not working properly, they are still in the off state without unplugging the power cord plug, which consumes a small amount of electromagnetic energy. (2) The transmission lines in the room are brittle and have a large leakage current, which also consumes electromagnetic energy. Household electricity is privately and randomly connected
Privately connecting wires or randomly increasing the power consumption of machinery and equipment can cause the cables to overload and overheat, which is very likely to lead to short circuits in the wires, causing flames or overheating fires, resulting in fire accidents, and even electric shock accidents and safety incidents.
The accumulation of electrostatic effects
How could a fire accident occur
If the electrostatic effect on the charged body of the insulating layer accumulates gradually over a long period of time, there is a high possibility of generating a potential difference of several thousand volts or tens of thousands of volts to the ground, which can penetrate the surrounding gas and cause corona discharge. If there are flammable and explosive items or objects around, there is a high possibility of causing serious fire accidents and explosions. What is touch working voltage
Step voltage, operating voltage
When the current of the grounding device passes through the grounding system, a distributed potential difference is generated on the ground surface. If two points, at a horizontal distance of 0.8 meters from the equipment on the road surface and at a vertical upward distance of 1.8 kilometers along the equipment casing, are touched by others, the body will bear a working voltage, which is called the contact working voltage. There is a potential difference between two points on the road surface that are 0.8 meters horizontally apart. If the two feet of the body touch these two points, the working voltage borne on the body is called the step voltage. The working voltage that does not pose a threat to life when the body touches it is called the working voltage.