產品展示
聯(lián)系我們
聯(lián)系人：麥女士
手機：+86 15270269218
電話：
Q Q：3136378118
郵箱：stodcdcs@gmail.com
地址：江西省九江市瑞昌市東益路23號賽湖農商城401號
o由于接觸帶電部件而導致的人員流動
電流通過人體。影響包括：
-強直化：受電流影響的肌肉不自主收縮
松開被夾住的導電部件是困難的。注：非常高的電流
通常不要誘發(fā)肌肉強直，因為當身體接觸時
這樣的電流，肌肉收縮是如此持續(xù)，以至于
肌肉運動通常會使受試者遠離傳導
部分
-呼吸停止：如果電流流過控制呼吸的肌肉
這些肌肉的不自主收縮改變了正常的呼吸
過程和受試者可能因窒息而死亡或遭受后果
窒息造成的創(chuàng)傷；
-心室顫動：危險的影響是由于疊加
通過產生
不受控制的收縮會引起心動周期的改變。這種異?，F象
可能成為不可逆轉的現象，因為即使在
刺激已經停止；
-灼傷：它們是由于電流通過焦耳效應產生的熱量引起的
穿過人體。
標準IEC 60479-1“電流對人和牲畜的影響”是
關于通過人體的電流影響的指南
電氣安全要求的定義。本標準顯示
時間-電流圖，四個區(qū)域，交流對其的生理影響
o persons due to contact with live parts is caused by the flow of the current through the human body. The effects are: - tetanization: the muscles affected by the current flow involuntary contract and letting go of gripped conductive parts is difficult. Note: very high currents do not usually induce muscular tetanization because, when the body touches such currents, the muscular contraction is so sustained that the involuntary muscle movements generally throw the subject away from the conductive part; - breathing arrest: if the current flows through the muscles controlling the lungs, the involuntary contraction of these muscles alters the normal respiratory process and the subject may die due to suffocation or suffer the consequences of traumas caused by asphyxia; - ventricular fibrillation: the most dangerous effect is due to the superposition of the external currents with the physiological ones which, by generating uncontrolled contractions, induce alterations of the cardiac cycle. This anomaly may become an irreversible phenomenon since it persists even when the stimulus has ceased; - burns: they are due to the heating deriving, by Joule effect, from the current passing through the human body. The Standard IEC 60479-1 “Effects of current on human being and livestock” is a guide about the effects of current passing through the human body to be used for the definition of electrical safety requirements. This Standard shows, on a time-current diagram, four zones to which the physiological effects of alternating
相關產品
