Printing companies have many materials that are flammable, such as alcohol, gasoline, thinner water (banana water), paper, etc., which are key fire prevention units, but there are hidden safety hazards such as pulling ground and zero connection chaos.
Through the understanding of many printing plants, it is found that in printing companies, in order to eliminate static electricity, the metal shells of laminating machines, folding machines, printing machines, knife sharpeners and other machinery are grounded separately. In the three-phase three-wire system, the neutral wire is not directly grounded, and the shell of the electrical equipment is reliably connected to the grounding electrode with a wire, which is called protective grounding. In the three-phase four-wire system, the neutral wire is directly grounded, and the shell of the electrical equipment is reliably connected to the neutral wire. It is called protection connected to zero (also called protection connected to neutral). The insulation material of the equipment will be aged for a long time. When the temperature is too high or exceeds the allowable value, if the voltage is too high, it may break through the insulation material and cause leakage.
In order to use electricity safely, different power grids should use the above two different protection measures. Now printing companies generally use three-phase four-wire power supplies, but in actual work, due to poor safety awareness, negligence of work, or to save trouble, the shells of electric appliances such as motors in 220V power lines are not neutral. Wire connection, and the motor shell and the machine shell are connected, in fact, form a three-phase three-wire system, that is, protective grounding. Because there are both protective grounding and protective zero connection, when the equipment touches the shell, it will not only cause more electric shock accidents, but also cause fire. In order to eliminate hidden dangers, it is necessary for printing companies to uniformly adopt protective zero connection, repeatedly ground the zero line, and ensure that its resistance value is less than 4Ω. Regularly check the neutral line to prevent disconnection. The electrical management personnel are required to hold a certificate to work, increase their sense of responsibility and standardize their operations. Only in this way can hidden dangers be eliminated and electricity can be used safely.
It is new latest design 2100W Hair Dryer. it comes with hot and cool function and also comes with hi and low function . so it have dual switch control. that is not comes with other.in today's day and age, it comes with good quality and low price. so all can afford it. From room occupying appliances and pocket-fitting devices, to meters and meters of cables, no home is stranger to any of these.
Hair Dryer 2100W,keratin protect hair dryer,perfect blow-dryer,Professional Hair Dryer for Salon
Ningbo Meirou Electric Appliance Co.,Ltd. , https://www.mrairblower.com