SU1372436A1 - Spark gap array - Google Patents

Abstract

The invention relates to the field of electrical engineering, in particular to electrical overvoltage protection devices. The purpose of the invention is to reduce the spread of breakdown voltages. The block of spark gaps contains two groups of series-connected power spark gaps 3,4 connected between two pins 1 and 2, a chain of three groups of shunting elements, igniting a gap 14 connected in parallel with the first group of a shunting chain, a chain of parallel-connected resistor and a capacitor 16 , 17, connected between the midpoint of the power gaps and the junction point of the first and second shunting groups. The shunt chain groups are made of parallel-connected capacitors 7, 9, 11 and the linear resistor 8, 10, 12 with additional connection to the third group of the highly linear resistor 13 with a nonlinearity coefficient of about 0.02-0.03, and the selection of the parameters of the shunting elements is made from conditions for ensuring the equality of voltage on the first group and the total voltage on the second and third groups during the working mode, and ensuring the division of voltage growth by the first and second groups with a ratio of about 10: 5 for voltages above the worker. 1 il. with S (L with to 4: with O5

Description

parts of shunting, in the first rye comes first group

The invention relates to electrical engineering, and specifically to protection devices against overvoltages of electrical equipment of direct and alternating current.

The purpose of the invention is to reduce the spread of breakdown voltages of a block of spark gaps,

The drawing shows the principle — Q is distributed over the first

on the electrical circuit of the block of spark gaps.

The block of spark gaps contains two groups of power gaps 3 and 4, 15 that are connected between pins 1 and 2, three groups of chains of shunt elements connected between points 1 and 5, 5 and 6 and 6 and 2, with the first group consisting of parallel-connected capacitor 7 and a resistor 8, 20 second from the capacitor 9 and a resistor 10, and a third from a capacitor 11, a linear resistor 12 and a highly non-linear resistor 13. Parallel to the first shunt group, 25 ignition gap 14 is connected. Between the midpoint 15 of the power gaps and the connection point 5 the first and a second group of shunt elements is connected to a communication circuit consisting of 30 of a parallel-connected capacitor 16 and a resistor 17.

For normal operation of the unit, the capacitance of the capacitor 7 is selected by an order of magnitude greater than the capacitance, and the resistance of the resistor 8 is an order of magnitude smaller than the resistance of the power spark gaps.

In order to ensure uniform distribution of voltages across intervals 3 (Up) and 4 (Up.) In the operating mode, the capacitance and resistance of the first shunting group are equal to the equivalent capacitance and the resistance of the second and third groups, taking into account the parameters of the highly linear resistor.

The essence of the invention is that in the operating mode by two

35

In addition, the voltage is divided into a group with a highly nonlinear voltage, and the voltage growth is

for groups with a K relation, the growth of the main butts of the burning gap and the breakdown of the block with a small time is in the known block of the ratio of capacity 7 to it

Claims (1)

Formula isob A block of spans interposing two groups of successive power spark chains of three groups of ignition that are ignited, igniting the intermediary parallel with the shunt chain, of parallel connected and capacitor, is connected by the middle point of the power point and the point of connection of the first shunt group that is separate the fact that, from the crawl of the punching block, the groups of the chain are filled from parallel to the capacitor and linear with an additional connection to the third group of high selector with a coefficient of the order of 0.02-0.03, and comrade shuntirovkn starting from conditions secu-OPERATION voltage on the first sum voltage to the third groups at Started ratio and provide first and second groups Ru in the range of 5 to 10 parts of the shunt, in the first of which the first group occurs, and in the second one it is distributed along the first In the second and third shunt groups, the voltage is divided equally, and when overvoltage is on the third group with a high-linear resistor, the voltage remains almost unchanged, and the voltage rise on the unit and second groups with a K: 1 ratio, i.e. the growth is mainly applied to the igniting gap and provides the breakdown of the block with a small scatter than that of the known block, where the ratio of capacitance 7 to capacitance 9. Invention Formula A block of spark gaps containing two groups of series-connected power spark gaps connected to two terminals, a chain of three groups of shunting elements, igniting a gap connected in parallel with the first group of a shunting chain, a connection from a parallel-connected resistor and a capacitor connected between the midpoint of the power gaps and the point of connection of the first and second shunting groups, characterized in that, in order to reduce the spread of the breakdown voltage of the block, the shuntyro chain groups The ki are made of a parallel-connected capacitor and a linear resistor with an additional connection to the third group of a highly linear resistor with a nonlinearity coefficient of the order of 0.02-0.03, and the selection of the parameters of the shunting elements is based on the equality of the first group and the total voltage in the second and third groups during the operating mode and ensuring the ratio of the stresses in the first and second shunting groups in the range from 5 to 10.