A current-voltage terminal device

Abstract

The application provides a current-voltage terminal device, comprising a fixed support, a mounting rail arranged on the fixed support, a plurality of voltage transformer terminal rows, a plurality of current transformer terminal rows and a detection device arranged side by side on the mounting rail; one side of the voltage transformer terminal row is provided with a voltage incoming line, and the other side of the voltage transformer terminal row is provided with a plurality of parallel voltage outgoing lines; one side of the current transformer terminal row is provided with a pair of current incoming lines, and the other side of the voltage transformer terminal row is provided with a pair of current outgoing lines; the detection device is used for applying voltage to one line and detecting the voltage returned in another line; whether the incoming and outgoing lines are incorrectly connected is judged. The application is more convenient, safe and reliable in wiring; the wiring circuit network is more clear and convenient for later maintenance; the detection equipment and instruments in the cabinet can be replaced without power interruption; the wiring error correction and troubleshooting efficiency in the cabinet is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, in particular to a current voltage terminal device. BACKGROUND

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

[0003] In practical application, the output end of the voltage transformer needs to be connected in parallel with multiple detection devices such as the voltmeter, the watt-hour meter, the protection switch and other measurement and protection devices, and the output end of the current transformer also needs to be connected in series with multiple groups of current monitoring and testing devices such as the ammeter, the watt-hour meter and the over-current protection device. Therefore, the number of voltage and current transformer lines in the power cabinet such as the switch cabinet and the measurement cabinet is large, the connection is prone to error, and the maintenance, detection and replacement of the detection devices are not safe, and need to be replaced during power-off operation. SUMMARY

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

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

[0006] A fixed support is provided with a mounting rail, a plurality of voltage transformer terminal blocks, a plurality of current transformer terminal blocks and a detection device are arranged side by side on the mounting rail, and the detection device is connected to the current transformer terminal block.

[0007] One side of the voltage transformer terminal block is provided with a voltage incoming line, and the other side of the voltage transformer terminal block is provided with a plurality of parallel voltage outgoing lines.

[0008] One side of the current transformer terminal block is provided with a pair of current incoming lines, and the other side of the voltage transformer terminal block is provided with a pair of current outgoing lines.

[0009] The detection device is used to apply voltage to the line connected thereto and detect the voltage returned in the other line, and judge whether the current transformer incoming and outgoing lines are incorrectly connected according to the returned voltage.

[0010] Preferably, the fixing support is plate-shaped, one side of the fixing support is provided with the mounting guide rail, the mounting guide rail is provided with a protrusion, and clamping grooves are arranged on both sides of the protrusion.

[0011] Preferably, the voltage transformer terminal block at least comprises a shell support, a terminal post and a wire pressing bolt; the shell support has a spacing groove inside, the terminal post is clamped and fixed in the spacing groove; the bottom of the shell support is provided with a mounting clamping groove for being fixed on the mounting support; one end of the terminal post is provided with a hole, and the voltage incoming line and the voltage outgoing line can be inserted into the hole and connected with the terminal post by the wire pressing bolt.

[0012] Preferably, the terminal post at least comprises an integrated terminal post and a separate terminal post; the integrated terminal post is used for connecting the voltage incoming line with a shorting piece, and the separate terminal post is used for connecting the shorting piece with the voltage outgoing line.

[0013] Preferably, the voltage transformer terminal block is further provided with a shorting piece, the shorting piece connects the voltage incoming line and the voltage outgoing line by a bolt, so that the voltage incoming line and the voltage outgoing line are kept in communication; when it is necessary to replace the instrument equipment in the rear stage, the bolt corresponding to the shorting piece is loosened, so that the voltage incoming line and the voltage outgoing line are disconnected.

[0014] Preferably, both ends of the shell support are provided with incoming and outgoing line holes, and the incoming and outgoing line holes are used for inserting the voltage incoming line and the voltage outgoing line into the terminal post.

[0015] Preferably, the current transformer terminal block at least comprises a shell support, a terminal post and a wire pressing bolt; the shell support has a spacing groove inside, the terminal post is clamped and fixed in the spacing groove; the bottom of the shell support is provided with a mounting clamping groove for being fixed on the mounting support; both ends of the shell support are provided with incoming and outgoing line holes, and the incoming and outgoing line holes are used for inserting the current incoming line and the current outgoing line into the terminal post; one end of the terminal post is provided with a hole, and the current incoming line and the current outgoing line can be inserted into the hole and connected with the terminal post by the wire pressing bolt.

[0016] Preferably, the current transformer terminal block further comprises a reserved detection hole and a shorting piece; the reserved detection hole is arranged corresponding to the current incoming line; the shorting piece connects the current incoming line and the current outgoing line by a bolt; when it is necessary to replace the equipment in the rear stage, a detection device is inserted into the reserved detection hole to short the current incoming line and disconnect the shorting piece; after the equipment is repaired and replaced, the shorting piece is connected and the detection device is removed.

[0017] Preferably, the detection device comprises a housing, a metal pin and a control circuit board; the control circuit board is fixed in the housing; one end of the metal pin is connected to the control circuit board, and the other end of the metal pin is connected to the current line.

[0018] Preferably, the control circuit board is provided with a buzzer, a status indicator, a short-circuit switch and a built-in battery; the short-circuit switch is used to control whether the current line connected thereto is short-circuited; the status indicator is used to output corresponding colors according to the returned voltage output; the buzzer is used to output corresponding prompt sounds when wiring errors are detected; and the built-in battery is used for power supply.

[0019] In summary, the embodiment of the present application has the following beneficial effects:

[0020] The current-voltage terminal device provided by the present application is more convenient, safe and reliable to wire; the wiring circuit network is more clear and easy to understand, facilitating later maintenance and repair; the detection equipment and instruments in the cabinet can be replaced without power interruption; and the wiring error correction and troubleshooting efficiency in the cabinet is higher. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0022] Figure 1 FIG. 1 is a schematic diagram of a current-voltage terminal device according to an embodiment of the present application.

[0023] Figure 2 FIG. 2 is a schematic diagram of a current-voltage terminal device according to another embodiment of the present application.

[0024] Figure 3 FIG. 3 is a schematic diagram of a voltage transformer terminal block according to an embodiment of the present application.

[0025] Figure 4 FIG. 4 is a schematic diagram of a voltage transformer terminal block according to another embodiment of the present application.

[0026] Figure 5 FIG. 5 is a schematic diagram of a current transformer terminal block according to an embodiment of the present application.

[0027] Figure 6 FIG. 6 is a schematic diagram of a detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0029] As shown in Figure 1 and Figure 2 , a schematic diagram of an embodiment of a current-voltage terminal device provided by the present application. In this embodiment, the device comprises:

[0030] A fixed support 1 is provided with a mounting rail, and a plurality of voltage transformer terminal rows 2, a plurality of current transformer terminal rows 3 and a detection device 4 are arranged side by side on the mounting rail; the detection device 4 is connected to the current transformer terminal row 3; one side of the voltage transformer terminal row 2 is provided with a voltage incoming line 201, and the other side of the voltage transformer terminal row 2 is provided with a plurality of parallel voltage outgoing lines 202; one side of the current transformer terminal row 3 is provided with a pair of current incoming lines 301, and the other side of the voltage transformer terminal row 2 is provided with a pair of current outgoing lines 302; the detection device 4 is used to apply voltage to one line connected thereto and detect the voltage returned in the other line; whether the current transformer incoming and outgoing lines have incorrect wiring is judged according to the returned voltage. It can be understood that the voltage transformer terminal row 2 is similar to a branching device with one incoming and multiple outgoing lines, which facilitates the wiring of multiple parallel devices of the same voltage transformer instrument. According to actual needs, it can be divided into one outgoing line and four to one outgoing line and eight. According to the principle of ammeter and current transformer, the incoming and outgoing lines of the current terminal row are in series, so the two lines connected in the circuit are actually in short circuit relationship. By using this characteristic, the detection device applies battery voltage to one line and detects the voltage returned in the other circuit to judge whether the current transformer incoming and outgoing lines have incorrect wiring and quickly find the position of the incorrect wiring. Compared with commonly used detection line error tools such as multimeter, the detection device 4 is small in size, the pins are the same width as the reserved detection holes, and the detection is more convenient and efficient.

[0031] In one embodiment, the fixed support 1 is plate-shaped, one side of the fixed support 1 is provided with the mounting rail, the mounting rail is provided with a protruding portion, and the protruding portion is provided with a clamping groove on both sides. The terminal row is fixed on the mounting support of the electrical cabinet.

[0032] In one embodiment, as shown in Figure 3 and Figure 4As shown, the voltage transformer terminal block 2 at least includes a housing support 207, a terminal post, and a wire pressing bolt 203; the housing support 207 has a spacing groove inside, the terminal post is clamped and fixed in the spacing groove; the bottom of the housing support 207 is provided with a mounting clamping groove 208 for being fixed on the mounting support; one end of the terminal post is provided with a hole, the voltage incoming line and the voltage outgoing line can be inserted into the hole and connected with the terminal post by the wire pressing bolt 203. The both ends of the housing support 207 are provided with incoming and outgoing line holes, the incoming and outgoing line holes are used for the voltage incoming line and the voltage outgoing line to be inserted into the terminal post. It can be understood that the housing support 207 has a spacing groove inside, the terminal post is fixed in the spacing groove by a buckle device, so that it is fixed. The both ends of the support are provided with incoming and outgoing line holes, so that the cable line is conveniently inserted into the terminal post. The bottom of the support is a guide rail type mounting clamping groove 208, which is used for fixing the terminal block on the mounting support of the electrical cabinet.

[0033] In one embodiment, the terminal post at least includes an integrated terminal post 205 and a separate terminal post 204; the integrated terminal post 205 is used for connecting the voltage incoming line with the shorting piece 206, and the separate terminal post 204 is used for connecting the shorting piece 206 with the voltage outgoing line. It can be understood that the separate terminal post 204 and the integrated terminal post 205 are both good conductive metal materials, one end of the terminal post is provided with a hole, and the conductor of the wire is inserted and connected by the wire pressing bolt 203 after being tightened. The integrated one is similar to a one-in and multiple-out branching device, which is convenient for multiple parallel equipment instrument wiring of the same voltage transformer. According to actual needs, it can be divided into one-out-four to one-out-eight. The incoming terminal post of the voltage transformer has two types of integrated and separate, some monitoring and metering devices need to be connected with three-phase four-wire at the same time, so the incoming line needs to be a separate voltage terminal block, the A, B, C, N four-phase incoming line is connected with the separate terminal block, and is connected to the equipment instrument through the outgoing terminal block, which is a voltage wiring module of different phases. Sometimes, different phases need to be branched to different instruments, so the one-in and multiple-out voltage terminal is more suitable. The same incoming phase line is branched to multiple branch lines and connected to the equipment.

[0034] In one embodiment, the voltage transformer terminal block 2 is further provided with a shorting piece 206, the shorting piece 206 connects the voltage incoming line and the voltage outgoing line by a bolt, so that the voltage incoming line and the voltage outgoing line are kept in communication; when the instrument equipment of the later stage needs to be replaced, the bolt corresponding to the shorting piece 206 is loosened, so that the voltage incoming line and the voltage outgoing line are disconnected. It can be understood that the shorting piece 206 connects the incoming and outgoing lines by a bolt, so that the incoming and outgoing lines are kept in communication. When the instrument equipment of the later stage needs to be replaced, the bolt of the shorting piece 206 is loosened, so that the incoming and outgoing lines are disconnected, and the equipment can be safely and conveniently replaced without power-off operation.

[0035] In one embodiment, asFigure 5 As shown, the current transformer terminal block 3 comprises at least a housing bracket, a terminal post 303, and a wire pressing bolt 304. The housing bracket has a spacing groove inside, and the terminal post 303 is clamped and fixed in the spacing groove. The bottom of the housing bracket is provided with a mounting clamping groove for being fixed on the mounting bracket 1. The two ends of the housing bracket are provided with wire inlet and outlet holes for the current inlet wire 301 and the current outlet wire 302 to be inserted into the terminal post 303. One end of the terminal post 303 is provided with a hole, and the current inlet wire 301 and the current outlet wire 302 can be inserted into the hole and connected with the terminal post 303 by the wire pressing bolt 304. The current transformer terminal block 3 further comprises a reserved detection hole 305 and a short-circuiting piece 306. The reserved detection hole 305 is provided corresponding to the current inlet wire 301. The short-circuiting piece 306 connects the current inlet wire 301 and the current outlet wire 302 by a bolt. When the later-stage equipment needs to be replaced, the detection device is inserted into the reserved detection hole 305 to short-circuit the current inlet wire 301 and disconnect the short-circuiting piece. After the equipment is repaired and replaced, the short-circuiting piece is connected and the detection device is removed. It can be understood that the current terminal block comprises a housing bracket made of flame-retardant material, four independent terminal posts 303 (two-in two-out), a reserved detection hole 305, a wire pressing bolt 304, and a short-circuiting piece 306. The housing bracket has a spacing groove inside, and the terminal post 303 is clamped and fixed in the spacing groove. The two ends of the bracket are provided with wire inlet and outlet holes for facilitating the connection of the cable wire inserted into the terminal post 303. The bottom of the bracket is a guide rail type mounting clamping groove for fixing the terminal block on the mounting bracket 1 of the electrical cabinet. One end of the terminal post 303 is provided with a hole, and the conductor of the wire is inserted into the hole and connected by the wire pressing bolt 304. The wire inlet and outlet terminal posts 303 are connected by the short-circuiting piece 306. When the later-stage equipment needs to be replaced, the detection device is inserted into the reserved detection hole to short-circuit the current transformer inlet wire, and then the short-circuiting piece is disconnected. After the equipment is repaired and replaced, the short-circuiting piece is connected, and then the detection device is removed.

[0036] In one embodiment, 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, the other end of the metal pin 401 penetrates out of the shell, and the metal pin 401 can be inserted into the reserved detection hole and connected with the current incoming line. The control circuit board is provided with at least a buzzer 402, a state indicating lamp 403, a short circuit switch 404 and a built-in battery; the short circuit switch 404 is used for controlling whether the current incoming line connected therewith is short-circuited, the state indicating lamp 403 is used for outputting a corresponding color according to a returned voltage output, the buzzer 402 is used for outputting a corresponding prompt sound when a wiring error is detected, and the built-in battery is used for power supply. It can be understood that the shell is made of an insulating material, and the control circuit board is internally mounted and fixed. The insulating material isolates the live body, and facilitates detection operation.

[0037] The circuit board is provided with the prompt buzzer 402, the state indicating lamp 403, the short circuit switch 404 and the built-in battery. According to the principle of the ammeter and the current transformer, the current wiring terminal row is in series when the two lines are in and out, so that the two lines connected in the circuit are actually in short-circuit relationship. By using this characteristic, the detection device is connected to one line by adding a battery voltage, the returned voltage in the other circuit is detected to judge whether the current transformer incoming and outgoing wiring is incorrectly connected, and the position of the wiring error is quickly checked out. Compared with commonly used detection tools such as the multimeter, the detection device 4 is small in size, the pin is the same width as the reserved detection hole, and the detection is more convenient and efficient.

[0038] The reserved detection hole on the current wiring terminal row can simultaneously short-circuit the two incoming lines or outgoing lines by using the detection equipment. In addition, when the meter needs to be calibrated, a circuit breaker is disconnected, and a verification instrument is connected in series through the reserved detection hole.

[0039] In summary, the embodiment of the present application has the following beneficial effects:

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

[0041] The above only discloses the preferred embodiment of the present application, and of course cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A current and voltage terminal device, characterized in that, include: A fixed bracket is provided, on which a mounting rail is provided, and multiple voltage transformer terminal blocks, multiple current transformer terminal blocks and a detection device are arranged side by side on the mounting rail; The detection device is connected to the terminal block of the current transformer; A voltage input line is provided on one side of the voltage transformer terminal block, and multiple parallel voltage output lines are provided on the other side of the voltage transformer terminal block. A pair of current input lines are provided on one side of the current transformer terminal block, and a pair of current output lines are provided on the other side of the voltage transformer terminal block. The detection device is used to apply voltage to one of the connected lines and detect the voltage returned from the other line; based on the returned voltage, it determines whether there are incorrect wiring connections for the current transformer.

2. The apparatus as claimed in claim 1, characterized in that, The fixing bracket is plate-shaped, and the mounting guide rail is provided on one side of the fixing bracket. The mounting guide rail has a protrusion and slots on both sides of the protrusion.

3. The apparatus as described in claim 2, characterized in that, The voltage transformer terminal block includes at least a housing support, terminals, and clamping bolts; the housing support has an internal slot, and the terminals are snapped into the slot; the bottom of the housing support is provided with a mounting slot for fixing to the mounting bracket of the electrical cabinet; 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 to the terminal by clamping bolts.

4. The apparatus as described in claim 3, characterized in that, The terminal block includes at least an integrated terminal block and an independent terminal block; the integrated terminal block is used to connect the voltage input line to the jumper, and the independent terminal block is used to connect the jumper to the voltage output line.

5. The apparatus as described in claim 4, characterized in that, The voltage transformer terminal block is also equipped with a shorting piece, which connects the voltage input line and the voltage output line with bolts to keep them connected. When it is necessary to replace the downstream instrument equipment, the bolts corresponding to the shorting piece are loosened to disconnect the voltage input line and the voltage output line.

6. The apparatus as claimed in claim 5, characterized in that, The housing bracket has inlet and outlet holes at both ends, which are used for inserting the voltage inlet and outlet wires into the terminals.

7. The apparatus as claimed in claim 1, characterized in that, The current transformer terminal block includes at least a housing bracket, terminals, and clamping bolts; the housing bracket has an internal slot, and the terminals are snapped into the slot; the bottom of the housing bracket has a mounting slot for fixing it to the mounting bracket of the electrical cabinet; both ends of the housing bracket have inlet and outlet holes for inserting the current inlet and outlet wires into the terminals; one end of each terminal has a hole, through which the current inlet and outlet wires can be inserted and clamped to the terminal by the clamping bolts.

8. The apparatus as claimed in claim 7, characterized in that, The current transformer terminal block also includes a reserved detection hole and a shorting piece; the reserved detection hole is correspondingly set with the current input line; the shorting piece connects the current input line and the current output line by bolts; when it is necessary to replace the downstream equipment, the detection device is inserted into the reserved detection hole to short-circuit the current input line and disconnect the shorting piece; after the equipment maintenance and replacement are completed, the shorting piece is connected and the detection device is removed.

9. The apparatus as claimed in claim 8, characterized in that, The detection device includes at least a housing, metal pins, and a control circuit board; the control circuit board is fixed inside the housing, one end of the metal pin is connected to the control circuit board, and the other end of the metal pin extends out of the housing. The metal pin can be inserted into the reserved detection hole and connected to the current input line.

10. The apparatus as claimed in claim 9, characterized in that, The control circuit board is equipped 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 input line connected to it 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. The built-in battery is used for power supply.

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