Current and voltage terminal device

Abstract

The invention provides a current and voltage terminal device which comprises a fixing support, a mounting guide rail arranged on the fixing support, a plurality of voltage transformer terminal strips arranged on the mounting guide rail side by side, a plurality of current transformer terminal strips and a detection device. One side of the voltage transformer wiring terminal strip is provided with a voltage inlet wire, and the other side of the voltage transformer wiring terminal strip is provided with a plurality of parallel voltage outlet wires; one side of the current transformer wiring terminal strip is provided with a pair of current inlet wires, and the other side of the voltage transformer wiring terminal strip is provided with a pair of current outlet wires; the detection device is used for applying voltage to one line connected with the detection device and detecting voltage returned from the other line; and judging whether the incoming and outgoing wiring has wrong wiring. Wiring is more convenient, safer and more reliable; a wiring circuit network is clearer, and later maintenance and repair are facilitated; detection equipment and instruments in the cabinet can be replaced without power failure; and the wiring error correction and troubleshooting efficiency in the cabinet is higher.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, in particular to a current and voltage terminal device. Background Art

[0002] In order to ensure the safe and economical operation of the power system, the operation of the power equipment must be monitored and measured. However, general measurement and protection devices cannot be directly connected to the primary high-voltage equipment. Instead, the large current of the primary system needs to be converted into a small current in proportion to supply the measuring instrument or relay protection device. The voltage transformer and the current transformer play the role of voltage reduction, current conversion and electrical isolation. They are sensors for the secondary equipment such as measuring instruments and relay protection in the power system to obtain the current information of the electrical primary circuit. The current transformer converts the high current into a low current in proportion. The primary side of the current transformer is connected to the primary system, and the secondary side is connected to the measuring instrument, relay protection and other equipment.

[0003] In practical applications, the output end of the voltage transformer needs to be connected in parallel with a variety of detection equipment, such as voltage meters, energy meters, protection switches and other metering and protection equipment. Similarly, the output end of the current transformer also needs to be connected in series with multiple sets of current monitoring and testing equipment, such as ammeters, energy meters, overcurrent protection and other equipment. Therefore, there are many voltage and current transformer lines in power cabinets such as switch cabinets and metering cabinets, which are prone to wiring errors, and it is unsafe to maintain, inspect and replace the detection equipment, and power outages are required for replacement. Summary of the invention

[0004] The purpose of the present invention is to provide a current and voltage terminal device to solve the technical problem of how to improve the wiring efficiency and maintenance efficiency of the existing wiring device.

[0005] In one aspect, a current and voltage terminal device is provided, comprising:

[0006] A fixed bracket, on which a mounting rail is arranged, on which a plurality of voltage transformer terminal blocks, a plurality of current transformer terminal blocks and a detection device are arranged side by side; the detection device is connected to the current transformer terminal blocks;

[0007] A voltage input line is arranged on one side of the voltage transformer terminal block, and a plurality of parallel voltage output lines are arranged on the other side of the voltage transformer terminal block;

[0008] A pair of current inlet wires is arranged on one side of the current transformer terminal block, and a pair of current outlet wires is arranged on the other side of the voltage transformer terminal block;

[0009] The detection device is used to add voltage to a line to which it is connected, and detect the voltage returned in another line; and judge whether there is a wrong wiring in the current transformer input and output wiring according to the returned voltage.

[0010] Preferably, the fixing bracket is in a plate shape, the mounting rail is arranged on one side of the fixing bracket, a protrusion is arranged on the mounting rail, and slots are arranged on both sides of the protrusion.

[0011] Preferably, the voltage transformer terminal block includes at least a shell bracket, a terminal post, and a wire-pressing bolt; a spacing groove is provided inside the shell bracket, and the terminal post is snap-fitted and fixed in the spacing groove; a mounting slot is provided at the bottom of the shell bracket for fixing on the mounting bracket; a hole is provided at one end of the terminal post, and the voltage input line and the voltage output line can be inserted into the hole and pressed and connected with the terminal post through the wire-pressing bolt.

[0012] Preferably, the terminal comprises at least an integrated terminal and an independent terminal; the integrated terminal is used to connect the voltage input line with a shorting piece, and the independent terminal is used to connect the shorting piece with the voltage output line.

[0013] Preferably, a short-circuit is also provided in the voltage transformer terminal block, and the short-circuit connects the voltage input line and the voltage output line through bolts to keep the voltage input line and the voltage output line connected; when the subsequent instrument equipment needs to be replaced, the bolts corresponding to the short-circuit are loosened to disconnect the voltage input line and the voltage output line.

[0014] Preferably, both ends of the housing bracket are provided with inlet and outlet holes, and the inlet and outlet holes are used for inserting the voltage inlet wire and the voltage outlet wire into the terminal.

[0015] Preferably, the current transformer terminal block at least includes an outer shell bracket, a terminal post, and a wire pressing bolt; a spacing groove is provided inside the outer shell bracket, and the terminal post is snap-fitted and fixed in the spacing groove; a mounting slot is provided at the bottom of the outer shell bracket for fixing on the mounting bracket; inlet and outlet holes are provided at both ends of the outer shell bracket, and the inlet and outlet holes are used for the current input line and the current output line to be inserted into the terminal post; a hole is provided at one end of the terminal post, and the current input line and the current output line can be inserted into the hole and pressed and connected with the terminal post by the wire pressing bolt.

[0016] Preferably, the current transformer terminal block also includes a reserved detection hole and a short-circuit plate; the reserved detection hole is arranged corresponding to the current incoming line; the short-circuit plate connects the current incoming line and the current outgoing line through bolts; when the subsequent equipment needs to be replaced, the detection device is inserted into the reserved detection hole to short-circuit the current incoming line and disconnect the short-circuit plate; when the equipment maintenance and replacement is completed, the short-circuit plate is connected and the detection device is removed.

[0017] Preferably, the detection device at least includes a shell, a metal pin and a control circuit board; the control circuit board is fixed in the shell, one end of the metal pin is connected to the control circuit board, and the other end of the metal pin passes through the shell, and the metal pin can be inserted into the reserved detection hole and connected to the current input line.

[0018] Preferably, at least a buzzer, a status indicator light, a short-circuit switch and a built-in battery are provided on the control circuit board; the short-circuit switch is used to control whether the current input line connected thereto is short-circuited, the status indicator light is used to output a corresponding color according to the returned voltage, the buzzer is used to output a corresponding prompt sound when a wiring error is detected, and the built-in battery is used to supply power.

[0019] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0020] The current and voltage terminal device provided by the present invention is more convenient, safe and reliable in wiring; the wiring circuit network is clearer and more convenient for later maintenance and repair; the detection equipment and instruments in the cabinet can be replaced without power outage; and the wiring error correction and troubleshooting efficiency in the cabinet is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0022] Figure 1 Schematic diagram of a current and voltage terminal device in an embodiment of the present invention.

[0023] Figure 2 Schematic diagram of a current and voltage terminal device in an embodiment of the present invention.

[0024] Figure 3 The figure is a schematic diagram of a voltage transformer terminal block in an embodiment of the present invention.

[0025] Figure 4 The figure is a schematic diagram of a voltage transformer terminal block in an embodiment of the present invention.

[0026] Figure 5 The figure is a schematic diagram of a current transformer terminal block in an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of a detection device in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 FIG. 1 is a schematic diagram of an embodiment of a current and voltage terminal device provided by the present invention. In this embodiment, the device includes:

[0030] A fixed bracket 1, on which a mounting rail is arranged, on which a plurality of voltage transformer terminal blocks 2, a plurality of current transformer terminal blocks 3 and a detection device 4 are arranged side by side; the detection device 4 is connected to the current transformer terminal block 3; a voltage input line 201 is arranged on one side of the voltage transformer terminal block 2, and a plurality of parallel voltage output lines 202 are arranged on the other side of the voltage transformer terminal block 2; a pair of current input lines 301 is arranged on one side of the current transformer terminal block 3, and a pair of current output lines 302 is arranged on the other side of the voltage transformer terminal block 2; the detection device 4 is used to add voltage to a line connected to it and detect the voltage returned in another line; and judge whether there is a wrong wiring in and out of the current transformer according to the returned voltage. It can be understood that the voltage transformer terminal block 2 is similar to a one-input and multiple-output branching device, which is convenient for wiring multiple parallel equipment instruments of the same voltage transformer. According to actual needs, it can be divided into one-output four to one-output eight. The detection device 4 is based on the principle of ammeter and current transformer. The two wires in and out of the current terminal are connected in series, so the two wires are actually short-circuited after being connected in the circuit. Using this characteristic, the detection device adds battery voltage to one line and detects the voltage returned in another circuit to determine whether there is a wrong wiring in the current transformer and quickly find out the location of the wiring error. Compared with commonly used tools for detecting wiring errors such as multimeters, the detection device 4 is compact, the pins are the same width as the reserved detection holes, and the detection is more convenient and efficient.

[0031] In one embodiment, the fixing bracket 1 is plate-shaped, the mounting rail is arranged on one side of the fixing bracket 1, a protrusion is arranged on the mounting rail, and slots are arranged on both sides of the protrusion, so as to fix the terminal block on the mounting bracket of the electrical cabinet.

[0032] An embodiment, such as Figure 3 and Figure 4As shown, the voltage transformer terminal block 2 at least includes a housing bracket 207, a terminal, and a wire pressing bolt 203; the housing bracket 207 has a spacing groove inside, and the terminal is fixed in the spacing groove; the bottom of the housing bracket 207 is provided with a mounting slot 208 for fixing on the mounting bracket; one end of the terminal is provided with a hole, and the voltage input line and the voltage output line can be inserted into the hole and connected with the terminal by the wire pressing bolt 203. The two ends of the housing bracket 207 are provided with inlet and outlet holes, and the inlet and outlet holes are used for the voltage input line and the voltage output line to be inserted into the terminal. It can be understood that the housing bracket 207 has a spacing groove inside, and the terminal is fixed in the spacing groove by a buckle device to fix it. The two ends of the bracket are provided with inlet and outlet holes, which are convenient for connecting the cable to be inserted into the terminal. The bottom of the bracket is a guide rail mounting slot 208, which is used to fix the terminal block on the mounting bracket of the electrical cabinet.

[0033] In one embodiment, the terminal post at least includes an integrated terminal post 205 and an independent terminal post 204; the integrated terminal post 205 is used to connect the voltage incoming line with the shorting piece 206, and the independent terminal post 204 is used to connect the shorting piece 206 with the voltage outgoing line. It is understandable that the independent terminal post 204 and the integrated terminal post 205 are both made of good conductive metal materials, and a hole is provided at one end of the terminal post. After the conductor of the wire is inserted, the connection is completed by tightening the wire pressing bolt 203 by pressing the wire. The integrated type is similar to a one-input and multiple-output branching device, which is convenient for wiring multiple parallel equipment instruments of the same voltage transformer. According to actual needs, it can be divided into one-output four to one-output eight. There are two types of incoming terminal posts of voltage transformers: integrated and split. Some monitoring and metering devices require three-phase four-wire access at the same time, so it is necessary to use a split voltage terminal block for the incoming line. The four-phase incoming lines of A, B, C, and N are connected to the split terminal block, and connected to the equipment instrument through the outgoing terminal block, which is a voltage wiring module for different phases. Sometimes different phases need to be connected to different instruments and equipment, so a voltage terminal with one input and multiple outputs is more suitable. Multiple branch lines are separated from the same incoming phase line and connected to the equipment.

[0034] In one embodiment, a shorting piece 206 is further provided in the voltage transformer terminal block 2, and the shorting piece 206 connects the voltage input line and the voltage output line by bolts, so that the voltage input line and the voltage output line remain connected; when the subsequent instrument equipment needs to be replaced, the bolts corresponding to the shorting piece 206 are loosened to disconnect the voltage input line and the voltage output line. It can be understood that the shorting piece 206 connects the input and output line by bolts, so that the input and output lines remain connected. When the subsequent instrument equipment needs to be replaced, the bolts of the shorting piece 206 are loosened to disconnect the input and output lines, so that the equipment can be replaced safely and conveniently without power outage.

[0035] An embodiment, such as Figure 5 As shown, the current transformer terminal block 3 at least includes a shell bracket, a terminal post 303, and a wire pressing bolt 304; a spacing groove is provided inside the shell bracket, and the terminal post 303 is fixed in the spacing groove; a mounting slot is provided at the bottom of the shell bracket for fixing on the mounting bracket 1; inlet and outlet holes are provided at both ends of the shell bracket, and the inlet and outlet holes are used for the current input line 301 and the current output line 302 to be inserted into the terminal post 303; a hole is provided at one end of the terminal post 303, and the current input line 301 and the current output line 302 can be inserted into the hole and pressed and connected with the terminal post 303 through the wire pressing bolt 304. The current transformer terminal block 3 also includes a reserved detection hole 305 and a short-circuit piece 306; the reserved detection hole 305 is arranged corresponding to the current input line 301; the short-circuit piece 306 connects the current input line 301 and the current output line 302 through a bolt; when the subsequent equipment needs to be replaced, the detection device is inserted into the reserved detection hole 305 to short-circuit the current input line 301 and disconnect the short-circuit piece; when the equipment maintenance and replacement is completed, the short-circuit piece is connected and the detection device is removed. It can be understood that the current terminal block includes a shell bracket of flame-retardant material, four independent terminals 303 (two in and two out), a reserved detection hole 305, a wire pressing bolt 304, and a short-circuit piece 306. There is a spacing groove inside the shell bracket, and the terminal 303 is fixed in the spacing groove by a snap device to fix it. There are inlet and outlet holes at both ends of the bracket to facilitate the insertion of the connecting cable into the terminal 303. The bottom of the bracket is a guide rail mounting slot, which is used to fix the terminal block on the mounting bracket 1 of the electrical cabinet. A hole is set at one end of the terminal 303. After the conductor of the wire is inserted, the connection is completed by tightening the wire crimping bolt 304. The input and output terminal 303 is connected through the short-circuit piece 306. When the subsequent equipment needs to be replaced, the detection device is inserted into the reserved test hole to short-circuit the current transformer incoming line, and then the short-circuit piece is disconnected. After the equipment maintenance and replacement is completed, the short-circuit piece needs to be connected first, and then the detection device is removed.

[0036] An embodiment, such as Figure 6As shown, the detection device 4 at least includes a shell, a metal pin 401 and a control circuit board; the control circuit board is fixed in the shell, one end of the metal pin 401 is connected to the control circuit board, and the other end of the metal pin 401 passes through the shell, and the metal pin 401 can be inserted into the reserved detection hole and connected to the current incoming line. At least a buzzer 402, a status indicator 403, a short-circuit switch 404 and a built-in battery are set on the control circuit board; the short-circuit switch 404 is used to control whether the current incoming line connected to it is short-circuited, the status indicator 403 is used to output the corresponding color according to the returned voltage, the buzzer 402 is used to output the corresponding prompt tone when a wiring error is detected, and the built-in battery is used for power supply. It can be understood that the shell is an insulating material, and the control circuit board is fixedly installed inside. The insulating material isolates the charged body to facilitate the detection operation.

[0037] The circuit board has a reminder buzzer 402, a status indicator light 403, a short-circuit switch 404, and a built-in battery. According to the principle of the ammeter and the current transformer, the two lines in and out of the current terminal are connected in series, so the two lines are actually in a short-circuit relationship after being connected in the circuit. Using this characteristic, the detection device adds battery voltage to one line and detects the voltage returned in another circuit to determine whether there is a wrong wiring in and out of the current transformer, and quickly finds the location of the wiring error. Compared with commonly used tools for detecting wiring errors such as multimeters, the detection device 4 is small in size, and the pins are the same width as the reserved detection holes, making detection more convenient and efficient.

[0038] The reserved detection hole on the current terminal block can be used to short-circuit two incoming or outgoing lines at the same time by using detection equipment. In addition, when calibration is required, disconnect one circuit breaker and connect the calibration instrument in series through the reserved detection hole.

[0039] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0040] The current and voltage terminal device provided by the present invention is more convenient, safe and reliable in wiring; the wiring circuit network is clearer and more convenient for later maintenance and repair; the detection equipment and instruments in the cabinet can be replaced without power outage; and the wiring error correction and troubleshooting efficiency in the cabinet is higher.

[0041] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A current and voltage terminal device, characterized in that: include: A fixed bracket, on which a mounting rail is arranged, on which a plurality of voltage transformer terminal blocks, a plurality of current transformer terminal blocks and a detection device are arranged side by side; The detection device is connected to the current transformer terminal block; A voltage input line is arranged on one side of the voltage transformer terminal block, and a plurality of parallel voltage output lines are arranged on the other side of the voltage transformer terminal block; A pair of current inlet wires is arranged on one side of the current transformer terminal block, and a pair of current outlet wires is arranged on the other side of the voltage transformer terminal block; The detection device is used to add voltage to a line to which it is connected, and detect the voltage returned in another line; and judge whether there is a wrong wiring in the current transformer input and output wiring according to the returned voltage.

2. The device according to claim 1, characterized in that The fixing bracket is in a plate shape, the mounting rail is arranged on one side of the fixing bracket, a protrusion is arranged on the mounting rail, and slots are arranged on both sides of the protrusion.

3. The device according to claim 2, characterized in that The voltage transformer terminal block at least includes an outer shell bracket, a terminal post, and a wire-pressing bolt; the outer shell bracket is provided with a spacing groove inside, and the terminal post is fixed in the spacing groove; the bottom of the outer shell bracket is provided with a mounting slot for fixing on the mounting bracket; one end of the terminal post is provided with a hole, and the voltage input line and the voltage output line can be inserted into the hole and pressed and connected with the terminal post through the wire-pressing bolt.

4. The device according to claim 3, characterized in that The binding posts at least include an integrated binding post and an independent binding post; the integrated binding post is used to connect the voltage input line with a shorting piece, and the independent binding post is used to connect the shorting piece with the voltage output line.

5. The device according to claim 4, characterized in that A shorting piece is also provided in the voltage transformer terminal block, and the shorting piece connects the voltage input line and the voltage output line through bolts so that the voltage input line and the voltage output line remain connected; when the subsequent instrument equipment needs to be replaced, the bolts corresponding to the shorting piece are loosened to disconnect the voltage input line and the voltage output line.

6. The device according to claim 5, characterized in that Both ends of the housing support are provided with inlet and outlet holes, and the inlet and outlet holes are used for the voltage inlet wire and the voltage outlet wire to be inserted into the terminal.

7. The device according to claim 1, characterized in that The current transformer terminal block at least includes a housing bracket, a terminal post, and a wire pressing bolt; a spacing groove is provided inside the housing bracket, and the terminal post is fixed in the spacing groove; a mounting slot is provided at the bottom of the housing bracket for fixing on the mounting bracket; inlet and outlet holes are provided at both ends of the housing bracket, and the inlet and outlet holes are used for the current input line and the current output line to be inserted into the terminal post; a hole is provided at one end of the terminal post, and the current input line and the current output line can be inserted into the hole and pressed and connected with the terminal post through the wire pressing bolt.

8. The device according to claim 7, characterized in that The current transformer terminal block also includes a reserved detection hole and a short-circuit piece; the reserved detection hole is arranged corresponding to the current incoming line; the short-circuit piece connects the current incoming line and the current outgoing line through bolts; when the subsequent equipment needs to be replaced, the detection device is inserted into the reserved detection hole to short-circuit the current incoming line and disconnect the short-circuit piece; when the equipment maintenance and replacement is completed, the short-circuit piece is connected and the detection device is removed.

9. The device according to claim 8, characterized in that The detection device at least includes a shell, a metal pin and a control circuit board; the control circuit board is fixed in the shell, one end of the metal pin is connected to the control circuit board, and the other end of the metal pin passes through the shell, and the metal pin can be inserted into the reserved detection hole and connected to the current input line.

10. The device according to claim 9, characterized in that The control circuit board is provided with at least a buzzer, a status indicator light, a short-circuit switch and a built-in battery; the short-circuit switch is used to control whether the current incoming line connected thereto is short-circuited, the status indicator light is used to output a corresponding color according to the returned voltage, the buzzer is used to output a corresponding prompt tone when a wiring error is detected, and the built-in battery is used to supply power.

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