What is the danger of electrocution without low voltage mcb circuit breaker protection?
What is the danger of being electrocuted?
When a person is electrocuted, the greater the current flowing through the body and the longer the phase current lasts, the more dangerous it is.The risk can be roughly divided into three stages: awareness - relief - ventricular fibrillation.
① Perception stage.Because the incoming current is very small, the human body can feel (generally greater than 0.5mA), at this time does not pose a hazard to people;② Get rid of stages.Refers to the hands of the electrode shock, people can get rid of the maximum current value (generally greater than 10mA), although this current has a certain danger, but can get rid of themselves, so basically not a fatal danger.When the current increases to a certain extent, the electric shock will be due to muscle contraction, spasm resulting in the grip of the charged body, can not get rid of themselves.③ Stage of ventricular fibrillation.As the current increases and the duration of the shock increases (generally greater than 50mA and ls), ventricular fibrillation will occur, which can lead to death if the power is not switched off immediately.It can be seen that ventricular fibrillation is the leading cause of death from electrocution in humans.Therefore, the protection of people, often do not cause ventricular fibrillation, as the basis to determine the characteristics of electric shock protection.
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