SU773806A1 - Multi-gap controllable discharger - Google Patents

Description

(54) MULTIPLE-CONTROLLABLE CONTROLLED BENCHMARKER

one

The invention relates to high-voltage impulse technology and can be used in impulse current generators and for example;

A known multi-gland control is a 5-m arrester containing a series of spark gaps, a resistive divider for evenly distributing the operating voltage across the gaps and a chain of capacitors with cylindrical shields. Each of the discharge electrodes is connected to a metal ring, which, together with the screen of the corresponding capacitor, forms a constructive transverse capacitance. 15 One end of the capacitor chain is connected through a resistor to one extreme electrode 1 of the arrester, and the other end is connected to the BTOpi-JM by the end electrode i via a trigger generator. 20

The lack of design - during the breakdown of insulation between any ring and the corresponding cylindrical screen, most of the pulse voltage is applied to the first 25 or several first (counting from the starting generator) capacitors of the chain. As a result, the capacitors and the entire discharge gap are out of order. In addition, the disadvantages of the 30

It should include a large number of non-standard structural elements - screens, insulating sleeves, etc.

The closest technical solution proposed is a multi-gap controlled discharge containing a series of consecutive main electrodes with a resistive voltage divider mounted on coaxially mounted conductive rings, inside which the control rod is coaxially separated from the rings by a solid insulator and trigger generator 2. The control rod is made of metal and, together with the rings, forms constructive transverse containers. The epoxy resin used is a solid insulator. One end of the control rod through the start-up generator is galvanically connected to one of the extreme main electrodes of the arrester.

The lack of construction - the insulation between the ring of the extreme main electrode and the rod is affected by the total working voltage, leading to accelerated aging of the insulation, and an increase in the likelihood of its breakdown. Generalization of the same insulation between any

ring and rod causes the entire discharge of the array to fail.

The aim of the invention is to increase the service life, reliability and manufacturability.

The goal is achieved by the fact that in a well-known multi-gap gage, containing a series of consecutive main electrodes with a resistive voltage divider, mounted on coaxially mounted conductive rings, inside which a control rod is located coaxially, separated from the rings by a solid insulator, and a trigger generator , the control rod is made of a dielectric with a high dielectric constant and is provided with a conductive nozzle at one of its ends, a solid insulator is made ene partitioned by the number of conductive rings and zapuskakndy generator is connected between the conductor and the nearest nozzle thereto extreme main electrode.

The use of an insulating rod eliminates all metallic elements from the area inside the rings, which significantly increases the strength of the Insulation of the whole structure and, accordingly, increases the strength of the device. There is also no need for the use of complex technology for the manufacture of insulation by pouring compound. In addition, in the case of a breakdown of insulation between a ring and an electrode at the end of the rod, the discharge occurs on the surface of the rod, which does not lead to the failure of the entire discharge, but only needs to be replaced by a punched insulation section on which the ring is mounted. Thus, the service life of the entire device is significantly increased.

FIG. 1 shows a constructive performance of the bit; FIG. 2 is equivalent to an electrical replacement circuit of the bit. .

The discharge contains a ceramic insulating rod 1 of a material with a high () relative dielectric constant, at one end of which a conductive nozzle 2 is tightly fixed. constant voltage across the spark gaps. The metal rings 5 mounted on the insulating sections b are connected to the electrodes 3 and create a constructive capacity relative to the end nozzle 2. An insulating sleeve 7 is located between the end nozzle 2 and the first section b, fixing the position of the specified section relative to the end nozzle 2. Insulation between the end cap 2 and the first ring 5 is designed for the maximum pulse voltage of the starting generator. Insulating cylinder 8 provides rigidity.

The device works as follows.

The constant voltage applied to the discharge (supplied to the outermost electrodes) is evenly distributed over the spark gaps by resistors 4. The end nozzle 2, before applying the starting pulse, has the same potential as the closest electrode 3. The triggering voltage from the starting generator is supplied voltage pulse (applied between end cap 2 and electrode 3 nearest to it). The voltage pulse amplitude is much greater than the static breakdown voltage of one spark gap. The inter-electrode equivalent The capacitance 9 (Fig. 2) is chosen much smaller than the transverse capacitance 10 of the ring 5 relative to the end nozzle 2. The magnitude of the last capacitance is determined mainly by the ratio of the relative dielectric constant of the materials of the rod 1 and section 6, the first of which is much larger than the second. this is why all capacitances 10 are approximately the same, due to the large difference in capacitances 9 and 10, the voltage pulse is almost completely applied to the extreme spark gap. After the breakdown of this gap, a voltage pulse is applied to the next spark gap and also breaks through it. The process continues until all spark gap breaks down.

The use of the invention increases the reliability of operation and the service life of the arrester, which makes it possible to reject the complicated and expensive technology of making insulation. The design allows you to quickly replace individual damaged insulation sections and restore the operability of the arrester. The working voltage of the discharge voltage can be changed by changing the number of sections with rings and electrodes and choosing the appropriate length of the ceramic rod.

Claims (1)

1. USSR author's certificate No. 653660, cl. H 01 T 5/04, 1977. 2lDmputse greneratots encapsutoted spcivV g-otps.Eng-ineer, 1968, 226, no. 5870, 134-135. qpq Fig-1