CN210051861U - High-voltage switch characteristic comprehensive test system - Google Patents

Abstract

The utility model discloses a high-voltage switch characteristic comprehensive test system, which comprises a high-voltage switch characteristic tester, tester accessories and a switch body, wherein the tester accessories comprise various connecting wires and a sensor mounting bracket; the sensor mounting bracket comprises a universal clamp, one end of the universal clamp is connected with a sensor fixing plate, the other end of the universal clamp is connected with a switch body, the sensor fixing plate is fixedly provided with a sensor body, one end of the sensor body is connected with a junction box, the other end of the sensor body is connected with a sliding rod, and the sliding rod is connected to a movable contact through a universal joint. The utility model discloses can satisfy the stability requirement that utilizes the sensor to gather high tension switchgear operating characteristic signal, guarantee measuring result's accuracy.

Description

High-voltage switch characteristic comprehensive test system

Technical Field

The utility model relates to a high tension switchgear technical field specifically is a high tension switchgear characteristic integrated test system.

Background

With the development of society, people have higher and higher requirements on the safety and reliability of electricity utilization, a high-voltage switch plays a double task of control and protection in a power system, and the quality of the performance of the high-voltage switch is directly related to the safety operation of the power system.

The high-voltage switch characteristic tester is mainly used for testing the action characteristics of the high-voltage switch during switching on and switching off, and comprises test items related to displacement, stroke, speed and bounce, and the action characteristics of the high-voltage switch are analyzed and calculated according to the collected displacement and stroke signals of the moving contact action of the high-voltage switch. The collection of the high-voltage switch action characteristic signal is completed through a sensor. The sensor is directly fastened and installed on a lifting rod of a switch, or a horizontal connecting rod, or other transmission contacts or moving contact connecting rods, and the sensor is installed by selecting corresponding radius clamping pieces according to the thickness difference of the moving contact or the moving contact connecting rods so that the sensor is firmly clamped on the moving contact or the moving contact connecting rods and cannot shake. When the switch acts, the sensor should move along with the moving contact or the moving contact connecting rod tightly, and the sensor cannot relatively shake with the moving contact or the moving contact connecting rod, otherwise, the test data can be inaccurate, so that the sensor needs to be fastened on the moving contact or the moving contact connecting rod by a certain auxiliary clamp, and the accuracy and the precision of the finally measured data are high. Meanwhile, relative shaking or friction cannot be generated between the sensor and the sensor fixing plate, so that the measurement accuracy is not high.

Chinese patent No. CN2823974Y discloses a universal fixture for a mechanical characteristic test sensor of a circuit breaker, which can fix a sensor body on a fixing plate for measurement, but the accuracy of the final measurement result may be affected due to the lack of a necessary damping and friction reducing measure between the sensor and the sensor fixing plate.

Disclosure of Invention

The utility model aims at the problem that prior art exists, provide a high tension switchgear characteristic integrated test system, can satisfy the stability requirement that utilizes the sensor to gather high tension switchgear operating characteristic signal, guarantee measuring result's accuracy.

In order to achieve the above object, the utility model adopts the following technical scheme:

the high-voltage switch characteristic comprehensive test system comprises a high-voltage switch characteristic tester, a tester accessory and a switch body, wherein the tester accessory comprises various connecting wires and a sensor mounting bracket; the sensor mounting bracket comprises a universal clamp, one end of the universal clamp is connected with a sensor fixing plate, the other end of the universal clamp is connected with a switch body, the sensor fixing plate is fixedly provided with a sensor body, one end of the sensor body is connected with a junction box, the other end of the sensor body is connected with a sliding rod, and the sliding rod is connected to a movable contact through a universal joint.

Preferably, the sensor fixing plate is of a rectangular frame structure, a damping layer is arranged in the rectangular frame structure, and the sensor body is arranged on the damping layer.

Preferably, two long sides of the rectangular frame structure are provided with protruding structures, and the protruding structures are provided with a plurality of screwing pieces.

Preferably, the universal clamp is connected with the switch body through a U-shaped clamp head.

Preferably, one end of the U-shaped clamp is provided with a fixing bolt in threaded connection, and the U-shaped clamp is used for being fixed on the switch body through the fixing bolt.

Preferably, the high-voltage switch characteristic tester comprises a tester shell, a microcomputer control device, an energy storage device, a contact signal line port, a test and control line port, a sensor port, a power supply port, a switch button, a display screen and an operation button.

Preferably, the high-voltage switch characteristic tester also comprises a printing port and a printing control button, and the printing control button is connected with the microcomputer control device.

Preferably, the high-voltage switch characteristic tester further comprises an RS232 or RS485 communication port.

Preferably, the high-voltage switch characteristic tester further comprises a USB socket, and the USB socket is of a groove structure.

Preferably, the moving contact end is provided with a counter bore, the moving contact is sleeved at two ends of the sliding rod through the counter bores, and the inner wall of the counter bore is in sliding fit with the sliding rod.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a sensor installing support, universal fixturing with sensor fixed connection to the switch body to through the universal joint with the slide bar be connected to the movable contact, utilize the sensor to gather high tension switchgear's signal through the action of movable contact, and send control signal through the high tension switchgear tester and carry out the divide-shut brake test and result display and the printing of high tension switchgear signal; the utility model discloses still slow down the vibrations and the friction loss of sensor body in data acquisition process through set up the buffer layer on the sensor fixed plate, improve measurement accuracy.

Drawings

Fig. 1 is a schematic diagram of a contact signal line connection according to an embodiment of the present invention;

fig. 2(a) - (d) are schematic diagrams of the connection of the test and control lines of the present invention according to an embodiment;

fig. 3 is a schematic view of an installation structure of the sensor and the switch body according to the embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a high-voltage switch characteristic comprehensive test system, which comprises a high-voltage switch characteristic tester, a tester accessory and a switch body, wherein the tester accessory comprises various connecting wires and a sensor mounting bracket; the sensor mounting bracket comprises a universal clamp, one end of the universal clamp is connected with a sensor fixing plate, the other end of the universal clamp is connected with a switch body, the sensor fixing plate is fixedly provided with a sensor body, one end of the sensor body is connected with a junction box, the other end of the sensor body is connected with a sliding rod, and the sliding rod is connected to a movable contact through a universal joint. The junction box is connected with the high-voltage switch tester through an electric wire and used for sending data acquired by the sensor to the high-voltage switch tester.

In specific implementation, the middle position of the stroke of the sensor is used to determine the opening and closing position of the contact, so that the stroke of the contact is contained in the stroke of the sliding rod, and the stroke of the moving contact is in the middle of the stroke of the sliding rod, thereby improving the sampling accuracy and avoiding damaging the sensor. The sensor is used for measuring the displacement of the moving contact in the direction, so that the degrees of freedom in other directions except the displacement of the moving contact in the moving direction are limited during installation. During installation, the coaxiality error between the axis of the movable contact and the axis of the slide bar is required to be less than or equal to 0.2 mm.

In order to slow down the vibration and the friction damage that the sensor body received in the data acquisition process, influence data acquisition's accuracy, this implementation will the sensor fixed plate is established to rectangular frame structure, just set up the buffer layer in the rectangular frame structure, the sensor body sets up on the buffer layer. The shock absorbing layer may be made of a shock absorbing sponge or other materials having the same function.

In order to prevent the sensor body from sliding or shaking along with the action of the moving contact in the data acquisition process and influencing the accuracy of data acquisition, the two long sides of the rectangular frame structure are provided with protruding structures, and a plurality of screwing pieces are arranged on the protruding structures. The protruding structures of the two long sides form a rectangular groove on the sensor fixing plate, the sensor body is placed in the rectangular groove, and the sensor body is screwed inwards by the two long sides through the screwing piece to be fixed. The tightening pieces can be tightening buttons or tightening bolts.

In order to stably fix the universal clamp connected with the sensor body to the switch body, the universal clamp is connected with the switch body through the U-shaped chuck. The switch comprises a switch body and a U-shaped clamp head, wherein the switch body is provided with a switch body, the U-shaped clamp head is fixed on the switch body through a fixing bolt, and the U-shaped clamp head is fixed on the switch body through the fixing bolt.

As an implementation mode, a KTC type conductive plastic displacement sensor is selected for data acquisition, and the sensor is a precise electromechanical integrated element and is used for measuring the displacement value of a moving contact in a switch mechanical characteristic test. The sensor body is fixed on the sensor fixing plate, the middle of the sensor body is fixed on the switch body through the universal fixture, and the angle of the universal fixture is adjustable. Such an arrangement ensures that the sensor has sufficient stability during measurement, as shown in fig. 3, thereby making the measurement result more accurate.

In specific implementation, the high-voltage switch characteristic tester comprises a tester shell, a microcomputer control device, an energy storage device, a contact signal line port, a test and control line port, a sensor port, a power supply port, a switch button, a display screen and an operation button. Before the high-voltage switch test, the high-voltage switch tester body is connected through each connecting wire. The contact signal lines comprise A, B, C, D and five lines of 'common end', A, B, C is respectively connected with the three-phase static end of the tested high-voltage switch during testing wiring, and short-circuit wires are used for short-circuiting the three-phase moving end of the high-voltage switch A, B, C and are connected with the 'common end'. When the auxiliary contact D is selected, D is connected with the auxiliary contact at the opening position, and the contact is connected with the moving end of the phase A when the switch is at the opening position. If the sensor is installed without the auxiliary contacts enabled, the D-line is floating, as shown in FIG. 1.

The connection of the test and control lines is shown in fig. 2(a) - (d), wherein fig. 2(a) shows that the output is a normally open contact which is closed when the on/off command is issued, for controlling the on/off circuit (output signal); FIG. 2(b) shows a control split/combine loop (output signal); fig. 2(c) shows the start time (input signal) of the closing/opening time determined in parallel with the closing/opening coil; fig. 2(d) shows the external control measurement, which is the current sampling of the closing/opening coil loop, and is connected with the closing/opening coil loop in series, and the direct current has positive and negative division (input signal).

The microcomputer control device controls the process of the switching-on and switching-off test of the high-voltage switch, and the control program can be carried out by adopting the existing test program, which does not belong to the key point of the utility model, and is not repeated herein.

In order to facilitate the examination of the test result, the high-voltage switch characteristic tester further comprises a printing port and a printing control button, and the printing control button is connected with the microcomputer control device.

In order to facilitate remote data transmission, the high-voltage switch characteristic tester further comprises an RS232 or RS485 communication port. And the field test data is remotely sent to a background service center through an RS232 or RS485 communication port so as to carry out unified management and analysis on the data.

In addition, in order to facilitate local downloading of data, the high-voltage switch characteristic tester further comprises a USB socket which is of a groove structure. The staff can download the test data and result on the spot locally through the USB socket.

In specific implementation, the moving contact end is provided with a counter bore, the moving contact is sleeved at two ends of the sliding rod through the counter bore, and the inner wall of the counter bore is in sliding fit with the sliding rod.

As an embodiment, the sensor is an angular displacement sensor, and unlike a linear displacement sensor, the angular displacement sensor is fixed on a sensor fixing plate through a bolt and then fixed on the switch body through a universal clamp, and the angle of the universal clamp is adjustable. The sensor acquisition end is connected with a main shaft on the high-voltage switch body. The sensor is arranged on the main shaft of the switch body to ensure stable and firm installation and ensure that the coaxiality, namely the coaxiality error between the axis of the angular displacement sensor and the axis of the main shaft of the switch is less than or equal to 0.2 mm. The sensor mounting should be such that the rotational stroke of the spindle falls in the middle part of the rotational stroke of the sensor. The determination can be made using the following: the resistance values between the two ends of the sensors 1 and 3 and between the two ends of the sensors 1 and 2 are measured by using a multimeter, and basically R13 is ensured to be 2R 12.

The utility model discloses a sensor installing support, universal fixturing with sensor fixed connection to the switch body to through the universal joint with the slide bar be connected to the movable contact, utilize the sensor to gather high tension switchgear's signal through the action of movable contact, and send control signal through the high tension switchgear tester and carry out the divide-shut brake test and result display and the printing of high tension switchgear signal; the utility model discloses still slow down the vibrations and the friction loss of sensor body in data acquisition process through set up the buffer layer on the sensor fixed plate, improve measurement accuracy.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The high-voltage switch characteristic comprehensive test system is characterized by comprising a high-voltage switch characteristic tester, tester accessories and a switch body, wherein the tester accessories comprise various connecting wires and a sensor mounting bracket; the sensor mounting bracket comprises a universal clamp, one end of the universal clamp is connected with a sensor fixing plate, the other end of the universal clamp is connected with a switch body, the sensor fixing plate is fixedly provided with a sensor body, one end of the sensor body is connected with a junction box, the other end of the sensor body is connected with a sliding rod, and the sliding rod is connected to a movable contact through a universal joint.

2. The system of claim 1, wherein the sensor fixing plate is a rectangular frame structure, a shock absorbing layer is arranged in the rectangular frame structure, and the sensor body is arranged on the shock absorbing layer.

3. The system for comprehensively testing the characteristics of a high-voltage switch according to claim 2, wherein the two long sides of the rectangular frame structure are provided with protruding structures, and a plurality of fastening pieces are arranged on the protruding structures.

4. The system of claim 1, wherein the universal fixture is coupled to the switch body via a U-shaped clamp.

5. The system for comprehensively testing the characteristics of a high-voltage switch according to claim 4, wherein one end of the U-shaped clamp is provided with a fixing bolt in threaded connection for being fixed on the switch body through the fixing bolt.

6. The system of claim 1, wherein the high-voltage switch characteristic tester comprises a tester housing, a microcomputer control device, an energy storage device, a contact signal line port, a test and control line port, a sensor port, a power port, a switch button, a display screen, and an operation button.

7. The system of claim 6, wherein the high-voltage switch characteristic tester further comprises a print port and a print control button, the print control button being connected to the microcomputer control device.

8. The system of claim 7, wherein the high voltage switching characteristic tester further comprises an RS232 or RS485 communication port.

9. The system of claim 7, wherein the high voltage switching characteristic tester further comprises a USB socket, the USB socket having a recessed configuration.

10. The system for comprehensively testing the characteristics of the high-voltage switch as claimed in claim 1, wherein the movable contact end is provided with a counter bore, the movable contact is sleeved at two ends of the sliding rod through the counter bores, and the inner wall of the counter bore is in sliding fit with the sliding rod.

Images