SU951432A1 - Capacitive high-voltage divider of voltage - Google Patents

Description

The invention relates to electrical engineering, in particular, to high-voltage capacitive voltage dividers used in various circuits of high-voltage electrical devices.

A high-voltage capacitive voltage divider containing capacitors, a housing made of a dielectric material and an insulating fluid, such as transformer oil 1, is known.

However, such capacitive dividers are characterized by an insufficient cooling system, low electrical strength, low reliability of fixing capacitors.

Closest to the proposed technical entity is a capacitive 15 high-voltage voltage divider containing a cylindrical housing filled with a dielectric liquid, capacitors located in the housing and supporting insulating elements on which 2o are fixed capacitors 2.

However, the capacitive high-voltage divider of the voltage is characterized by an insufficient reliability of the attachment of capacitors to the case, i.e. the supports can

move only in the horizontal plane, while with linear expansion the structural elements change their dimensions in different directions (spatially). Other disadvantages of the capacitive voltage divider design are low electrical strength and large dimensions, since the divider case is cylindrical; rigid fixing of the findings, which, when volumetric spacing can lead to contact failure; low-tech construction, since adhesive gaps and resin pouches lead to additional difficulties — the electrical strength of the insulation is deteriorated, and the design is rendered non-maintainable.

The purpose of the invention is to increase reliability.

Claims (2)

This goal is achieved by the fact that a capacitive high-voltage voltage divider contains a cylindrical case filled with a dielectric fluid, capacitors located in the case and supporting insulating elements on which capacitors are fixed, provided with a collet clamp located at the base of the case and connected to one of the capacitor electrodes, each supporting insulating element is designed as an elastic ring with a capacitor located inside it, while the elastic ring is made with alternating Oops on the outer and inner cylindrical surfaces, with adjacent protrusions of one cylindrical surface symmetrically relative to the protrusions of another cylindrical surface. FIG. 1 shows a capacitive high-voltage voltage divider, general view; in fig. 2 is a cross section A-A in FIG. one; in fig. 3 - external element on the collet chuck; in fig. 4 - remote element on the outer ledge with a spherical surface. The high-voltage capacitive voltage divider contains capacitors 1, supporting insulating element elastic ring 2, dielectric finned body 3, base 4 divider, cover 5, clamping inserts — internal projections 6, external projections 7, pin bar 8, insulating liquid 9, collet the clamp 10, the safety device 11, the collet 12, the electrode 13 of the capacitor, the ball 14 of the outer protrusion and the sleeve 15. The high-voltage capacitive voltage divider contains capacitors 1, for example, type K15U-1A-, which are installed in the supporting insulating elements - elastic rings 2 with alternate external patterns. 7 and the internal protrusions 6, made in the form of a pressure insert. Supporting insulating elements - elastic rings 2 are made of a dielectric material and installed in the ribbed case 3. The case 3 is made of a dielectric material, for example, fiberglass based on fiberglass. The ends of the housing 3 are installed and secured with the base 4 of the divider and the cover 5. The capacitors 1 are fixed to the housing with the help of bus-pins 8 and a collet clamp 10. The insulating liquid 9 uses a refrigerant, for example, transformer oil. One of the capacitor electrodes 13 is installed in the collet 12, which is fixed in the catcher 11. Alternatively, the external protrusions 7 of the support elastic ring 2 can be equipped with balls 14, which are fixed on the sleeves 15. When a high-voltage capacitive voltage divider is connected to the electrical circuit and the passage of a current of large magnitude, large thermal emissions occur, which causes mechanical deformation of the structure due to different linear coefficients. The insulating support elements are made in the form of elastic rings 2 and are additionally equipped with spherical supports located on the outer lugs 7. This ensures the spatial fixation of capacitors 1 in the dielectric body 3, and the presence of gaps (channels) between the inner lugs 6 and the outer lugs 7 of the elastic ring 2 creates good opportunity for the passage of the insulating fluid 9. In addition, one of the electrodes of the capacitor has the ability to be fixed and move along the vertical axis with the collet 12, closed The use of collet clamp 10 makes it possible to install and fix the assembled ready block of several capacitors 1 directly in the housing 3. Thus, using this design of a capacitive high-voltage voltage divider makes it possible to increase the reliability of operation and creates an economic effect. Claims of Invention A capacitive high-voltage voltage divider containing a cylindrical case filled with a dielectric liquid with capacitors placed inside it and supporting insulating elements on which capacitors are fixed, characterized in that, in order to increase reliability, it is provided with a collet clamp located at the base of the case and connected to one of the capacitor electrodes, and each supporting insulating element is designed as an elastic ring with a capacitor located inside it, while the elastic the ring is made with alternating protrusions on the outer and inner cylindrical surfaces, with adjacent protrusions of one cylindrical surface symmetrically relative to the protrusions of the other cylindrical surface. Sources of information taken into account in the examination 1. US patent number 3975671, cl. 321-15, 1979. 2. Patent of Great Britain No. 1459624, cl. H 1 M, 1976 (prototype). -/one 2