CN202204861U - Electronic capacitive voltage divider - Google Patents

Abstract

The utility model relates to an electronic capacitive voltage divider used in the power industry, which consists of a sleeve, an upper flange, an expander, a high-voltage capacitive voltage dividing part, a low-voltage capacitive voltage dividing part, a winding fixing part, a lower flange, a base, a medium-voltage terminal and an upper cover plate, wherein the winding fixing part is fixed on the base; a high-voltage capacitor voltage division part and a low-voltage capacitor voltage division part are respectively fixed on the winding fixing part; a sleeve is fixedly arranged on the peripheral lower flange of the winding fixing part; the high-voltage capacitor voltage division part and the low-voltage capacitor voltage division part are integrally wound and fixed on the winding fixing part, so that internal components are stable, and the phenomenon of unstable quality caused by bumping is reduced; the low-voltage capacitor voltage division part is designed into two forms of a capacitor series part and a capacitor parallel part, so that the measurement precision is obviously improved; because the sleeve is arranged outside the winding fixing part, a closed sleeve cavity is formed, and the universality of the product is stronger.

Description

Electronic capacitive voltage divider

technical field

The utility model relates to a capacitor voltage divider used in the electric power industry, in particular to an electronic capacitor voltage divider.

Background technique

After retrieving relevant patent documents, no electronic capacitive voltage divider with the same structure as the utility model has been retrieved at present. Capacitive voltage dividers have been widely used in the power industry as a voltage test device for assigning different voltage levels from the measured voltage. Due to the structure of the existing capacitor voltage divider, the high-voltage capacitor voltage divider and the low-voltage capacitor voltage divider are generally connected in series to achieve the purpose of reducing the voltage, which makes the accuracy of the test relatively low and requires high testing. It is difficult to meet the requirements of high-precision testing for high-precision products, so it is necessary to improve the existing capacitive voltage divider to meet the actual needs.

Contents of the invention

The purpose of the utility model is to provide an electronic capacitive voltage divider improved on the basis of the existing capacitive voltage divider, which has high measurement accuracy, strong versatility, compact structure and good stability.

The technical feature of the utility model is that: on the basis of high measurement accuracy and strong versatility, it is designed to be composed of a sleeve, an upper flange, an expander, a high-voltage capacitor voltage divider, a low-voltage capacitor voltage divider, a winding and fixing part, The electronic capacitive voltage divider composed of the lower flange, the base, the medium voltage terminal and the upper cover plate is fixed with a winding fixing part on the base; the high voltage capacitor voltage dividing part and the low voltage capacitor voltage dividing part are respectively fixed on the winding fixing part ; There is an expander on the winding and fixing part; a casing is fixed on the lower flange around the winding and fixing part; an upper flange is fixed on the casing, and an upper cover is arranged on the upper flange; The flange is connected to the base; the medium-voltage terminal is fixed on the base; insulating oil is provided in the sealed cavity formed by the bushing, the upper cover plate and the base.

The sleeve is a hollow tube made of epoxy resin by winding and solidifying glass fiber yarn.

The high-voltage capacitive voltage dividing part is a high-voltage capacitive connection device connected in series.

The low-voltage capacitor voltage dividing part is composed of a capacitor series part and a capacitor parallel part. The capacitor series part means that the low-voltage capacitor bodies are connected in series; the capacitor parallel part refers to the low-voltage capacitor The bodies are connected in parallel with each other.

The winding fixing part is composed of a fixing frame and a winding part, and the fixing frame is a fixing frame body for fixing the high-voltage capacitor voltage dividing part and the low-voltage capacitor voltage dividing part; the winding part is respectively wound on the high-voltage capacitor voltage dividing part, The periphery of the low-voltage capacitive divider section makes it a solid fixture.

During production and installation, first design the high-voltage capacitor voltage divider and the low-voltage capacitor voltage divider according to the design requirements, and connect the capacitor elements of the high-voltage capacitor voltage divider in series according to the design requirements, and then connect them to the low-voltage capacitor voltage divider. The low-voltage capacitor voltage dividing part is composed of a capacitor series part and a capacitor parallel connection part, and the two parts are connected; then the outer parts of the high-voltage capacitor voltage dividing part and the low-voltage capacitor voltage dividing part are fastened and bound with insulating ties to make it a A stable and fixed whole, and then the whole is fixed on the fixed frame of the winding fixed part, and fixed on the base through the winding fixed part, so that the whole internal parts are stable; Insulating oil is injected into the sealed cavity.

The utility model has the advantages that: because the high-voltage capacitor voltage divider and the low-voltage capacitor voltage divider are integrally wound and fixed on the winding fixed part, the internal components are stable, and the quality instability phenomenon caused by bumps during transportation is reduced; The low-voltage capacitor voltage divider is designed in two forms: the capacitor series part and the capacitor parallel part, so that the measurement accuracy of the whole machine is significantly improved; because there is a sleeve outside the winding and fixed part, the entire capacitor voltage divider forms a closed sleeve. Tube cavity, so that it can be determined whether to install an umbrella skirt outside the casing according to different products and design requirements, so that the product is more versatile; due to its compact structure, reasonable structure, and high measurement accuracy, it has great practicality. and promotional value.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing:

Accompanying drawing 1 is the structural representation of the utility model electronic capacitive voltage divider;

Accompanying drawing 2 is the partial structural schematic diagram of electronic capacitive voltage divider.

Detailed ways

With reference to accompanying drawing 1, accompanying drawing 2, the electronic capacitive voltage divider of the present utility model is composed of bushing 1, upper flange 2, expander 3, high voltage capacitor voltage dividing part 4, low voltage capacitor voltage dividing part 5, winding fixing part 6. The lower flange 7, the base 8, the medium voltage terminal 9, and the upper cover plate 10 are fixed on the base 8 with a winding fixing part 6; The voltage dividing part 5, the high-voltage capacitor voltage dividing part 4 is a high-voltage capacitor connection device connected in series; the low-voltage capacitor voltage dividing part 5 is composed of a capacitor series part 51 and a capacitor parallel part 52, and the capacitors connected in series Part 51 means that the low-voltage capacitors are connected in series; the capacitor parallel part 52 means that the low-voltage capacitors are connected in parallel; the winding and fixing part 6 is provided with an expander 3. The winding fixing part 6 is composed of a fixing frame 61 and a winding part 62. The fixing frame 61 is a fixing frame body for fixing the high-voltage capacitor voltage dividing part 4 and the low-voltage capacitor voltage dividing part 5; the winding part 62 Wrapped on the periphery of the high-voltage capacitor voltage divider 4 and the low-voltage capacitor voltage divider 5, respectively, to make it a solid fixed body; the sleeve 1 is fixed on the lower flange 7 around the periphery of the fixed part 6, and the Sleeve 1 is a hollow tube body made of glass fiber yarn impregnated with epoxy resin by winding and solidifying; upper flange 2 is fixed on sleeve 1; upper cover plate 10 is arranged on upper flange 2, and the lower method The blue 7 is connected with the base 8; the medium voltage terminal 9 is fixed on the base 8; insulating oil is provided in the sealed cavity formed by the bushing 1, the upper cover plate 10 and the base 8.

Claims (5)

1. The electronic capacitive voltage divider consists of bushing (1), upper flange (2), expander (3), high-voltage capacitor voltage dividing part (4), low-voltage capacitor voltage dividing part (5), winding and fixing parts ( 6), the lower flange (7), the base (8), the medium voltage terminal (9), and the upper cover plate (10), which are characterized in that: the winding fixing part (6) is fixed on the base (8); The winding and fixing part (6) is respectively fixed with a high-voltage capacitor voltage dividing part (4) and a low-voltage capacitor voltage dividing part (5); an expander (3) is arranged on the winding and fixing part (6); ) on the peripheral lower flange (7) is fixed with a sleeve (1); on the sleeve (1) is fixed with an upper flange (2), and on the upper flange (2) is provided with an upper cover ( 10); the lower flange (7) is connected to the base (8); the medium voltage terminal (9) is fixed on the base (8); formed on the casing (1), the upper cover (10) and the base (8) Insulating oil is provided in the sealed chamber. 2. The electronic capacitive voltage divider according to claim 1, characterized in that: the sleeve (1) is a hollow tube made of epoxy resin by winding and curing glass fiber yarn. 3. The electronic capacitive voltage divider according to claim 1, characterized in that: the high-voltage capacitive voltage dividing part (4) is a high-voltage capacitive connection device connected in series. 4. The electronic capacitive voltage divider according to claim 1, characterized in that: the low-voltage capacitive voltage dividing part (5) is composed of a capacitor series part (51) and a capacitor parallel part (52), and the The capacitor series part (51) means that the low-voltage capacitors are connected in series; the capacitor parallel part (52) means that the low-voltage capacitors are connected in parallel. 5. The electronic capacitive voltage divider according to claim 1, characterized in that: the winding and fixing part (6) is composed of a fixing frame (61) and a winding part (62), and the fixing frame (61) It is a fixed frame body for fixing the high-voltage capacitor voltage divider (4) and the low-voltage capacitor voltage divider (5); the winding part (62) is respectively wound on the high-voltage capacitor voltage divider (4) and the low-voltage capacitor voltage divider ( 5) to make it a solid fixture.

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