Measures to prevent people from being injured by electricity - News - Global IC Trade Starts Here.

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In the normal sense, the process of electric shock is: when a certain external voltage is applied to the human body, a part of the human body forms a closed loop with the voltage, which generates an electric current that the human body cannot bear, thereby causing the human body to be injured.
Explain in detail above: First, the voltage should be applied to the human body to cause harm to people; second, the voltage applied to the human body must constitute a closed loop to generate electric current, which may cause injury (may be accompanied by light, heat, etc.) People), the third is that the current should be unacceptable to the human body.
In response to the above three points, to prevent people from being harmed by electricity, we should proceed from the following points:
First, we must do a good job of protecting electricity from electricity and applying it to the human body (called protective measures for direct electric shock).
(1) Insulate the charged body. If the wire is wrapped with insulating tape.
(2) Protected by a barrier and an external guard. It means that the outer casing of the electrical equipment can prevent the human body from directly contacting the live parts or setting the barrier in any direction, avoiding direct contact and live parts. The obstruction is required to be stable and durable, such as the door of the electric box, the outer casing of the motor, and the like.
(3) Protect with a barrier. Refers to reminders such as railings, warning signs, sounds, lights, etc., to avoid unintentional contact with live parts.
(4) Protection placed outside the arm. Refers to keeping the electrified body at a distance that is not in direct contact with normal activities, such as a high voltage wire rack on the pole.
The second point is that the electricity cannot constitute a closed loop (called a protective measure for indirect electric shock). If a person is subjected to an electric shock, if this protection is applied, people can be harmed.
(1) Use appropriate insulation protection devices so that even if people are exposed to electricity, they cannot make electricity into circuits, such as wearing insulated gloves, wearing insulated boots or standing on insulated floors, holding electrical wires without electrical injury. .
(2) Use an equipotential that is not grounded. After a person receives electricity, although the human body is charged, this electric power cannot constitute a loop, and no electric current can be generated, and people are not electrically injured. If the bird stands on a high-voltage electric line, it is safe and sound.
(3) Electrical isolation. If an isolation transformer is used, it requires a completely independent circuit to be insulated from the earth, so that if the person touches the charged body, the electricity cannot be connected to the earth through the human body, and then returns to the circuit, that is, the circuit cannot be formed, and the circuit is not damaged. .
Third, if a voltage is applied to the human body and at the same time constitutes a closed loop, the current flowing through the human body must be controlled to a range that the human body can withstand, thereby avoiding human injury.