Electrical injury is the damage caused by the thermal effect, chemical effect and mechanical effect of current. Among the electric shock casualties, 75% are pure electric injuries and electric injuries (40% are electric burns). Although more than 85% of electric shock deaths are caused by electric shock, about 70% of them contain electric injury. For the safety of professional electricians, it is more important to prevent electric shock.

Luoyang mechanical and electrical school has short-term electrician training courses, which are mainly practical and taught by teachers one-on-one.

(1) Electrical burns are injuries caused by the thermal effect of current, which can be divided into current burns and arc burns. Current burn is the injury caused by the contact between human body and charged body, and current is converted from electric energy to heat energy through human body. Current burns generally occur on low-voltage equipment or low-voltage lines. Arc burn is the damage caused by arc discharge, which can be divided into direct arc burn and indirect arc burn. The former is the burn caused by the arc between charged body and human body and the current flowing through human body; The latter is the burn caused by electric arc near human body, including the burn caused by splashing molten iron. Direct arc burns occur simultaneously with electric shocks. The arc temperature is as high as 8900℃, which can cause extensive deep burns, and even scorch and burn limbs and other parts. Large current passing through the human body may also dry and scorch the body tissues. The burn of high voltage arc is more serious than that of low voltage arc, and the burn of DC arc is more serious than that of power frequency AC arc. When direct arc burns occur, the current inlet and outlet are the most severely burned, and the body will also be burned. Unlike electric shock, electric arc burns will leave obvious marks on the surface of human body, and the lethal current is large. (2) skin metallization is the damage caused by the high temperature of electric arc, which makes the metal melt and vaporize, and the metal particles penetrate into the skin, making the skin rough and tense. Skin metallization usually occurs at the same time as arc burn.

(c) Electric branding is a permanent mark left on the part of human body that comes into contact with charged body. The skin at the spot loses its original elasticity and color, and the epidermis is necrotic and unconscious.

(4) Mechanical injury refers to tissue breakage, fracture and other injuries caused by central nervous system reflection and strong muscle contraction when electric current acts on human body.

(e) Electro-optic eye refers to the damage of infrared, visible and ultraviolet rays to the eyes during arc discharge. Electro-optic eyes show keratitis or conjunctivitis.