SU653660A1 - Multi-gap discharger - Google Patents

Description

The invention relates to the field of high-voltage impulse technology and can be used, for example, in high-voltage impulse voltage and current generators. Multi-gap controlled arresters are known, containing a series of spark gaps, a high-resistance resistive divider to evenly distribute the operating voltage across the spark gaps., A chain of series-connected capacitors directly connected to the outer electrodes through resistors or inductors to all the other electrodes of the arrester, and the generator 1 The disadvantage of this type of dischargers is that they can switch the voltage of at least 50% of the static breakdown voltage. The closest of the known technical solutions to this proposal is a multi-gap discharge containing a series of consecutive main electrodes with an ohmic voltage divider mounted on an insulator, in the body of which there is an extension control electrode connected to the intermediate main electrodes capacitors of transverse capacitance distributed in the body of the insulator, and a triggering generator connected between one of the extreme main electrodes and the corresponding end of the control a developing elektroda121. The operating voltage applied to the discharge is evenly distributed over the spark gaps by means of a high-resistance resistive H-voltage. Each of the discharge electrodes is connected to a ring located inside the cast compound block; the control electrode, made in the form of a cylindrical rod, is located / i-ceii but on the BbiUieyiuwisi axis of the rings and is isolated from them by a cast compound. One of the ends of the control electrode is connected through one auxiliary generator to one of the extreme electrodes of the discharge, and therefore as the free end of the control electrode approaches, the working voltage acting on the insulation between the LHMK and the rings increases. The isolation between the outermost ring and the free end of the control electrode is affected by the total operating voltage. Prolonged exposure of the working voltage to the insulation leads to accelerated aging, and, consequently, an increase in the probability of its breakdown. In turn, isolation breakdown in any place leads to uncontrolled triggering of the arrester and its outage. In addition, switching to a higher operating voltage requires reinforcing the insulation, i.e. developing a new design of the bit, and in some cases it may not be possible, for example, due to a significant increase in the size of the bit. The purpose of the invention is to increase the reliability of operation, increase the service life of the insulator and provide the possibility of increasing the operating voltage of the arrester without a significant change in its design. This is achieved by the fact that in a well-known multigap arrester containing a series of consecutive electrodes with an ohmic voltage divider mounted on an insulator, there is an extended control electrode connected to intermediate main electrodes in the body of transverse capacitors distributed in the body said insulator along the control electrode, and a trigger generator connected between one of the extreme main electrodes and the corresponding end of the control electrode According to this proposal, the control electrode is made in the form of a chain of serially connected control capacitors, and the connection of the transverse capacitors to the control electrode is made at common points of the control capacitors, and between the other extreme main electrode and the second end of the control electrode entered resistor. The implementation of a control electrode in the form of a chain of series-connected capacitors reduces the value of the operating voltage acting on the internal insulation between the respective rings of the capacitors of the transverse capacitance to zero, which increases the service life and eliminates the possibility of uncontrolled triggering of the insulator . Excluding the effect of the working voltage on the internal insulation between the rings reduces the requirements for it, which simplifies the construction of the surge and allows it to be assembled. FIG. 1 shows the constructive performance of the bit; in fig. 2 - electrical circuit. The arrester contains a chain of serially connected control capacitors 1, for example, of the type K-15-4, one of the ends: which is connected to the starting generator 2, and the other end is connected to the high-resistance resistor 3, for example, of the type TVO, connected to the extreme main electrode 4 devices. The uniform distribution of the operating voltage across the chain of control capacitors 1 is achieved by selecting capacitors with equal leakage resistance, or, if necessary, by installing a high-resistance resistive divider. Spark gaps of the glitter are shunted by resistors 5, for example, of the type of KEV, a high impedance voltage divider. The resistors are filled with an insulating compound, the rings 6 connected directly to the main electrodes 4 and the rings 7 connected to vb (the waters of the control capacitors 1 are in pairs formed by the capacitors of the transverse capacitance 8. The insulator sleeves 9 are installed on the rings 7 and are designed for the individual ISKDOBoro spacing.Insulation cy- - P provides rigidity of the structure and enhances the internal insulation of the discharge. On the cylinder 10 insulating sleeves 11 are mounted on which the rings 6 are fixed. On the insulating The base 12 is fixed to the main electrodes 4. The device operates as follows: When energized to the discharger, the operating voltage, which by means of the divider resistors 5 is evenly distributed over the spark gaps, the control capacitors 1 are charged through the resistor 3 and the driving generator 2. As a result The voltage applied to the insulation between the corresponding rings 6 and 7 is zero. The voltage between adjacent rings 6-6 and 7-7 is equal to the potential difference between adjacent discharge electrodes. In order to start the discharge, the voltage across the chain of control capacitors 1 from the starting generator of the generator is pulsed, the amplitude of which is much larger than the static voltage gap of a separate spark gap. Since the capacitance of the chain of control capacitors 1 is chosen the much larger transverse capacitance of the capacitors 8, which,. in turn, there should be a much larger interelectrode capacitance 13, the voltage pulse is almost completely applied to the extreme spark gap. During the breakdown of this gap, a voltage pulse is applied to the adjacent spark gap and causes its breakdown. This process continues until all spark gaps are triggered. With

In this case, the insulation between the rings 6-7 is affected only by the pulse voltage from the starting generator.

The use of the invention eliminates the effect on the insulation between the rings 6--7 of the operating voltage and the possibility of uncontrolled triggering of the arrester, which increases the reliability of the device. The working voltage of the discharge voltage can be increased without increasing its intrinsic isolation by dialing the corresponding numbers, ia is the same. elements, in the case of insulation breakdown between rings 6-7, damaged elements can be easily replaced. This increases the life of the entire device.

Formula inventions

Multiply discharger containing RID of consecutive main electrodes, with an ohmic voltage divider, mounted on an insulator, in the body of which an extended control electrode is located, connected to an interval 13; 3/3 3 P J 3

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ACCURATE main electrodes with the help of capacitors of the transverse capacitance distributed in the body of the specified insulator along the control electrode, and a starting generator connected between one of the extreme main electrodes and the corresponding end of the control electrode. characterized by the fact that, in order to ensure reliable operation and increase the service life of the insulator, the control electrode is made in the form of a chain of series-connected control capacitors, and the connection of the capacitors of the transverse capacitor to the control electrode is made at common points of the control capacitors ; CSGP-im the main electrode and nrophiN co .; control electrode is included, the additionally inserted resistor.

Sources of information taken into account in the examination

1. The patent of Switzerland 535508, N 02 M 3/06, 1973.

2. The US patent. About 3501646. cl. 307-110, 1970.

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