New Invention by Iranian Specialist Removes Plasma in Contacts of High-Voltage Switch
“When a connection exists between two points of an electronic circuit (high voltage switch contacts), for instance, for a voltage of 40KV and a distance between two points of 4 cm which includes air, a high electric current is discharged in standard conditions due to the application of high electric field intensity between the two points,” Amin Dehqaninejad told ANA.
He explained that depending on the resistance of the electrical circuit that includes those two points, a current is established in a few microseconds which is called the initial current (periodization current) and in a period of a few tenths of microamperes, adding that the next current which is a flood from the movement of electrons and the resulting positive ions which is called an avalanche current will be created which is much larger than the initial current.
“When the avalanche current created based on the 'Townsend equation' reduces the electrical resistance of the air between the two points, if we reduce the voltage from 40KV, for instance, to less than 4KV, this avalanche current (plasma created between the contacts) will still exist between the two points; therefore we have an initial voltage and then a sustained voltage which is 10 times stronger than the sustained voltage,” Dehqaninejad said.
Noting that no such high voltage switch has been produced in Iran and foreign states so far, he said, “The switch reduces the distance between two points to one-fifth of the previous one, which makes the work easy in practice, reduced the size of the system and the costs.”
High voltage electricity refers to electrical potential large enough to cause injury or damage. In certain industries, high voltage refers to voltage above a certain threshold. Equipment and conductors that carry high voltage warrant special safety requirements and procedures.
High voltage is used in electrical power distribution, in cathode ray tubes, to generate X-rays and particle beams, to produce electrical arcs, for ignition, in photomultiplier tubes, and in high-power amplifier vacuum tubes, as well as other industrial, military and scientific applications.
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