What is the difference between two-wire shock and two-phase shock in electrical accidents?
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What is the difference between two-wire shock and two-phase shock in electrical accidents? When a person stands on dry wooden planks and touches two live wires with their hands, electric shock occurs. What is the principle behind this? Please help, thank you
The phase voltage of conventional three-phase electricity is 380V, while the line voltage of single-phase electricity is 220V. When you come into contact with two live wires from different phases, the sensation is stronger than when you come into contact with the live wire and ground wire in single-phase electricity. If you can move them, you can do so in a more rhythmic and graceful manner. Of course, this wonderful time does not last long, and then you ascend to immortality.
Could it be explained in terms of principles? Thank you
Two-line electric shock can involve one phase wire and one neutral wire, or two phase wires; the former results in 220V, while the latter results in 380V； Two-phase electric shock involves contact with 380V. A person stands on dry wooden planks, with both hands touching two live wires; a 380V voltage is applied directly to the body. The current flows from the left hand through the heart to the right hand, causing immediate death – this is the most severe type of electric shock accident.
Regarding two-phase electric shock, there’s one thing I don’t understand: when both hands touch two live wires, with 380V voltage on each hand, the potentials are equal. If there’s no voltage difference, shouldn’t there be no current flow? Then how can electric shock still occur?
The explanation is really detailed: lol
Between the two hands is the 380V voltage side; it’s not 380V on the left and also 380V on the right – this is basic electrical knowledge
Although the voltage of each phase with respect to ground is 220V, it doesn’t mean that the potentials of these three phases are equal; the potential difference between them is 380V. Because their phase difference is 120 degrees.
The phase angle between any two phases is 120 degrees; what does it matter how many degrees it is, as long as it’s 380V, that’s all that matters
Hello, moderator. It is precisely because the phase difference is 120 degrees that the potential difference between the two phases is 380V