Can high voltage and low current cause harm to the human body?

It depends on how high the current you are talking about. There is a technology in the power system called live work. It is to work directly on the high-voltage line, which is the situation of high voltage and no current as you say.

Workers wear equipotential protective clothing, which is the clothing of metal conductors, to ensure that the voltage of the whole body is the same as that of the high-voltage line, and there is no current, which is safe for the human body!

There is another example, sitting in a metal car, when the high-voltage line falls on the car, and the people in the car are safe at this time. But if the person gets out of the car and has one foot on the car and the other on the ground, forming a step voltage current, he will be electrocuted.

It is mainly electric currents that affect humans.

Voltage is just another way to measure the amount of current passing through.

Because the resistance is different for different people, and some people have a high resistance, even if the voltage is high, the current passing through it may be small.

The relationship between voltage and current is related, although it is the current that takes the determining factor; The main factor of electrocution is also related to the electric current Therefore, according to the different resistance of the human body, the ** level is different, but the consequences of the same current are almost the same;

The human resistance is about 7000 ohms; The voltage is high, divided by the resistance current; Therefore, it is difficult to have a high voltage and low current; For example, the current of 100,000V flowing through a person is about 1A, and the current of the human body is more than 50 milliA. For 10kV high-voltage transmission lines, the human body current is nearly amperere, and it will be electrocuted; The situation you mentioned is more difficult to appear, only in the low voltage situation, such as 36V and 48V, at this time the voltage is relatively low, and the relative voltage of the human body resistance is relatively large; The resistance flowing through the human body is less than a few millia, so the difference in damage is more obvious;

Categories: Science & Engineering >> Engineering & Technology Sciences.

Analysis: Most of what you said on the first floor is correct, however, the resistance of the human body is not constant, but changes with the environment. Basically, the resistance of the human body is between 1000 ohms and 1500 ohms.

When we work in a low-voltage and high-current environment, we should generally try to keep our body dry. In this way, the resistance of our body can be above 1000 ohms, so as long as the voltage does not exceed 40 volts, then the current in our body will not reach 30 milliamps. Then the electric current has no effect on the body, and our body basically does not feel it.

Actually, landlord, in the environment where you work, the constant voltage of your work, and the impedance of our body itself, then according to the formula: current voltage impedance, so the current through your body is less than 30 milliamperes. Then you don't have to worry about it.

But some of your operating procedures must also be followed, and you must not be careless, otherwise it will be very unsafe.

In addition, according to some uncertain medical care data, it is beneficial for a small amount of electric current to pass through the body, which can play a role in disinfection and sterilization. For example, there are now ** centers for electrotherapy, which are based on this principle to carry out business, so you don't have to worry about the landlord, as long as you strictly follow your operating rules and regulations, there will be no problem.