Short circuit powerful electrical power damages equipment
Thread Content
Regarding short circuit, there are many hazards, such as causing user voltage to drop and short-circuit current to burn out equipment and circuits. But why is the strong electric power during short circuit causing mechanical damage to the equipment? How to understand? What is the mechanism of electrodynamic force formation and the factors that affect its magnitude?
This post was last edited by zhaohh3211 on 2010-8-17 08:03 The current in a short circuit is too large, very large, so it will burn out the wires and the electrical parts in the equipment.
This post was last edited by zyz8438 on 2010-8-17 00:06 There is no objection to short-circuit current burning electrical equipment. The original poster is concerned about the dynamic stability of electrical equipment. There is a magnetic field around a wire carrying current, and the magnetic field lines tend to shorten. Therefore, two wires carrying current in the same direction attract each other, and two wires carrying current in opposite directions repel each other. This force of attraction or repulsion is the "electromotive force" of the electrical circuit. It is precisely because of the existence of this electric power that the short-circuit current is very large, so the electric power it generates is also very huge. If the mechanical strength of the electrical equipment is insufficient, it may cause deformation or even damage to the electrical equipment.