An Encyclopedia of Anti – Arc Knowledge

Arc is the body near the high pressure, but not contact, by the body's induction as a bridge form of electricity jumping, it can produce the highest temperature of 29400 degrees Celsius, about four times the sun's surface temperature, causing intense gas explosion and electrical burns. Arc injury, usually refers to the hot arc burn caused by the huge arc heat generated by the electricity in the ionized air when the human body is not exposed to the current. The danger of arc is often different from other electrical damage. It is often without contact and easy to be neglected and difficult to avoid. Direct contact with the clothes that are lighted can cause serious burn or death of the workers. Anti arc clothing is the clothing that prevents the arc from damaging the human body. Once the arc proof clothing is exposed to the arc flame or the heat, the internal high strength and low elongation bulletproof fiber will automatically expand rapidly, which makes the fabric thicker and the density becomes higher, forming a protective barrier to the human body. It has the functions of flame retardant, heat insulation and antistatic. It will not cause failure or deterioration due to washing.

1. The electric arc explosion burn is the most serious injury in arc injury. It mainly comes from the thermal radiation emitted from the arc explosion and the molten metal splashed. Anti arc clothing

2. An arc explosion causes the clothes to be ignited and burn or clothing droplets, causing serious burns.

3. The damage caused by loud noise caused by arc explosion.

4. The physical damage caused by the impact force caused by the arc explosion.

The unit of ATPV (Arc Thermal Performance Value) is a unit of Cal/cm2 (calorie per square centimeter); it refers to the total energy in a unit area and is used to detect the strength of the arc. The exposure energy of 1 Cal/cm2 is equivalent to a lighted cigarette butt on the fingertip for 1 seconds, as long as 1-2 Cal/cm2 will cause 2 degree burns to human skin.

According to the American NFPA Association, it is known that arc injuries are mainly caused by the huge heat energy produced by arc explosions that cause burns to the human body, so the standard for measuring the possible damage to the arc is usually the use of electric arc energy standards, that is, Cal/cm2 (calorie per square centimeter). The greater the ATPV value of arc proof clothing, the better the arc proof performance.