Type of electric shock and electric shock current and voltage damage to the human body - News - Global IC Trade Starts Here.

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

SMD aluminum electrolytic capacitor

MOS power IC full range

1.5PF SOT23-6 Low Capacitance 5V Breakdown Voltage 6V SRV05

First, the type of electric shock Most electric shock accidents are single-phase electric shock, which means that a certain part of the human body is in contact with a charged object, causing current to flow through the human body called electric shock. Electric shock The human body is injured by current, and the damage caused by human body can be divided into electric shock and electric shock according to its nature.

1. Electric shock refers to the internal injury caused by current flowing through the internal organs of the human body (such as heart, lung and brain), destroying the normal work of the heart and lungs of the human body and the nervous system, and even endangering human life. Most of the electric shock deaths are caused by electric shocks.
The degree of electric shock wounding depends on the magnitude of the current flowing through the human body, the length of the energization time, the way and frequency of the current, and the condition of the electric shocker itself. The most dangerous when passing current through the heart and brain, the longer the power-on time, the greater the risk.

2. Electric injury is also called electrocautery, which refers to the damage caused by the thermal, chemical or mechanical effects of current. Electric injuries often occur outside the human body, such as burns by electric arcs, electric current passing through a part of the human body to cause local injury, leaving scars on the body, energized metal melting and splashing under high current, and causing damage to the skin.
Second, the electric shock current and voltage damage to the human body After the human body is shocked, the current and voltage will cause various kinds of damage to the human body and even cause life loss. The following major factors have a major impact on the consequences of electric shock.
1. Current magnitude and damage current are direct factors of electrical shock. When the current passes through the human body, depending on the magnitude of the current, the human body feels different degrees of damage. If the current flowing through the human body is 20 milliamperes (mA), people are uncomfortable with paralysis, and they can hardly get rid of themselves. Especially when the human hand is hit by electricity, the muscle contraction instead grips the charged object, and there is a possibility of burns. If the current flowing through the human body is 50 mA, the human respiratory organs will be paralyzed, causing death. The household uses a 25-watt incandescent lamp, and the current flowing through the bulb is 114 mAh. If it flows through the human body, it is enough to kill people.

2. The voltage is higher and the voltage is higher after the electric shock. The higher the current flowing through the human body, the higher the contact voltage, the skin rupture, the lower the electrical resistance of the human body, and the higher the current through the human body. Conversely, the lower the voltage, the smaller the current flowing through the body.
The power supply voltage of the household is generally 220 volts (V). The longer the electric shock time and the damage current affect the human body after the electric shock, the smaller the human body resistance, the greater the current passing through the human body, the more serious the damage to the human body. If the power frequency is 50 mA AC, if the action time is not long, it will not die. If it lasts for 10 seconds (s), it will cause heart ventricular fibrillation, and the heart will stop beating and die.

3. The way current flows through the human body Because of the different parts of the human body, the way in which current flows through the human body is different, and the path through which it is passed is closely related to the result of electric shock. Current through the head can stun people, and the spinal cord can cause paralysis of the limbs. If it passes through the heart, respiratory system and central nervous system, it can lead to mental disorders, cardiac arrest, and interruption of blood circulation. It can be seen that current passing through the heart and respiratory system is the most likely to cause electrocution.
4, the size of the human body resistance and damage to the human body resistance is the resistance of the human body to the current when the current passes through the human body. The organic structure of each part of the human body is different, and the size of the resistance is also different. Such as skin, fat, bone path, nerve resistance is relatively large, in which the outer surface of the skin's horny electrical resistance is the largest, while the resistance of muscle and blood is relatively small. The greater the resistance of the human body, the smaller the current flowing through the body after an electric shock, and the less dangerous it is. The human body resistance is not a constant constant. The higher the contact voltage, the smaller the body resistance; the longer the contact with the live conductor, the smaller the body resistance.
5, the type of current, frequency and damage AC frequency is higher (such as greater than 200 Hz), because the current path has a skin effect, rarely through the human heart, can only cause burns without life-threatening, and daily use The power supply is mostly AC power with a frequency of 50 Hz (frequency), and the frequency is low, which is the most serious hazard to human body electric shock.