Phase control device of vacuum circuit breaker

Abstract

The utility model discloses a phase control device of an isolation vacuum circuit breaker. The phase control device comprises a phase change control module. The phase change control module is provided with a voltage signal input end for accessing a voltage signal, a current signal input end for accessing a current signal and a phase signal output end for outputting a phase signal; the phase change control module is also provided with at least one of a switch-on and switch-off operation integration and a signal integration. The opening and closing operation integration comprises a local closing end and a local opening end; the signal integration comprises at least one position signal end; the local switching-on end, the local switching-off end and the position signal end are respectively provided with a voltage regulating module. The device is used for being connected with a monitor or a display device capable of detecting various functional lines of the isolation vacuum circuit breaker, so that reliable monitoring is realized, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment technical field especially relates to a phase control control device of isolated vacuum circuit breaker. BACKGROUND

[0002] In the related equipment of high voltage switch, to avoid the overvoltage, the switching operation transient phenomenon of inrush current appearing in the process that circuit breaker is opened and closed, reference prior art CN116344258A, its control system provides alternating voltage waveform, alternating current waveform and zero crossing point domain value to phase control control device through three-phase voltage transformer and three-phase current transformer in real time, then, phase control control device responds to the dynamic current alternating voltage waveform and its domain value of input, and forms analog electronic loop, accurately judges zero crossing phase, and sends opening / closing instruction at zero crossing phase transient, thereby solving transient phenomenon.

[0003] But, the control system above is single in function, cannot satisfy the detection demand to various function lines, and the safety is lower. UTILITY MODEL CONTENT

[0004] In order to overcome at least one defect described in the prior art, the utility model provides a phase control control device to access the monitor or display device that can detect various function lines of vacuum circuit breaker, realizes reliable monitoring, and improves the safety of use.

[0005] The utility model discloses a technical scheme that solves the problem is as follows:

[0006] A phase control control device of isolated vacuum circuit breaker, including phase change control module, voltage signal input end for accessing voltage signal, current signal input end for accessing current signal, voltage signal output end for outputting voltage signal, current signal output end for outputting current signal are provided on the phase change control module, and at least one of opening and closing operation integration and signal integration is further provided on the phase change control module;

[0007] The opening and closing operation integration includes just-in-place closing end and just-in-place opening end, and the signal integration includes at least one position signal end;

[0008] The just-in-place closing end, the just-in-place opening end and the position signal end are respectively provided with voltage regulating module.

[0009] Further, the voltage signal input end includes three voltage transformers, the primary side of three voltage transformers is connected to external three-phase voltage circuit respectively, the secondary side of three voltage transformers is connected to main controller, and three voltage transformers correspond to voltage input end Ua, voltage input end Ub and voltage input end Uc respectively;

[0010] And / or, the current signal input end comprises three current transformers, the primary sides of the three current transformers are connected to external three-phase current circuits respectively, the secondary sides of the three current transformers are connected to the main controller, and the three current transformers correspond to the current input end IA, the current input end IA1, the current input end IB, the current input end IB1, the current input end IC and the current input end IC1 respectively.

[0011] The phase signal output end comprises an A / B phase common end, an A / B phase closing end, an A / B phase opening end, a C phase common end, a C phase closing end and a C phase opening end.

[0012] Further, the primary sides of the three voltage transformers are connected in parallel.

[0013] Further, the at least one position signal end comprises an A / B position signal end and a C position signal end.

[0014] The A / B position signal end and the C position signal end are respectively provided with voltage regulating modules.

[0015] Further, the closing and opening operation integration further comprises a protection tripping end.

[0016] The protection tripping end is provided with a voltage regulating module.

[0017] Further, the signal integration further comprises a working position signal end, a test position signal end and a ground knife signal end.

[0018] The working position signal end, the test position signal end and the ground knife signal end are respectively provided with voltage regulating modules.

[0019] Further, the phase change control module is further provided with a power input end.

[0020] Further, the phase change control module is further provided with a communication interface output end.

[0021] Further, the voltage regulating module comprises a voltage regulating circuit.

[0022] The voltage regulating circuit comprises an optical coupling isolator and a current limiting resistor, the optical coupling isolator comprises a light emitting diode and a triode, the input end of the light emitting diode is connected with the current limiting resistor in series, the current limiting resistor is connected to the positive pole of an external voltage, the output end of the current limiting light emitting diode is connected to the negative pole of the external voltage, and the collector of the triode is connected to the phase change control module and the emitter is grounded.

[0023] In summary, the phase control device and the phase control switch circuit system have the following technical effects:

[0024] The integrated on-off operation and / or signal integration is introduced on the basis of the voltage signal input end and the current signal input end, the integrated on-off operation and / or signal integration can be connected with various functional lines, then the various functional lines can be connected with a monitor or a display device, the monitor or the display device is used for feeding back the on-off state of each part of the vacuum circuit breaker, and the safety of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic view of a phase control device according to the present application;

[0026] Figure 2 Position Figure 1 A circuit diagram of a voltage regulating circuit of the voltage regulating module. DETAILED DESCRIPTION

[0027] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0028] In the description of the present application, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, structure and operation, and therefore cannot be understood as limiting the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application.

[0030] Referring to Figure 1 The present application discloses a phase control device, which comprises a phase change control module; the phase change control module is provided with a voltage signal input end for connecting with a voltage signal, a current signal input end for connecting with a current signal, a voltage signal output end for outputting a voltage signal, and a current signal output end for outputting a current signal; and the phase change control module is further provided with at least one of an integrated on-off operation and a signal integration; the integrated on-off operation comprises a local closing end and a local opening end; the signal integration comprises at least one position signal end; the local closing end, the local opening end and the position signal end are respectively provided with a voltage regulating module.

[0031] Optionally, the voltage signal input end comprises three voltage transformers, primary sides of the three voltage transformers are connected to the external three-phase voltage circuit respectively, and secondary sides of the three voltage transformers are connected to the main controller; and / or, the current signal input end comprises three current transformers, primary sides of the three current transformers are connected to the external three-phase current circuit respectively, and secondary sides of the three current transformers are connected to the main controller.

[0032] In the embodiment, the phase change control module is a single-chip microcomputer or the like. The phase control device of the isolation vacuum circuit breaker is connected to the three-phase voltage circuit and the three-phase current circuit. Correspondingly, the voltage signal input end comprises three voltage transformers, the current signal input end comprises three voltage transformers, and the current signal input end comprises three current transformers, thereby forming three-phase voltage transformers and three-phase current transformers. Specifically, the three-phase voltage transformers comprise voltage input ends Ua, Ub and Uc (i.e. phase A, phase B and phase C), and current input ends IA, IA1, IB, IB1, IC and IC1. The phase signal output end comprises A / B phase common end, A / B phase closing end, A / B phase opening end, C phase common end, C phase closing end and C phase opening end. The A / B phase closing end and the A / B phase opening end can form signal output loops with the A / B phase common end to output A / B phase closing signals or A / B phase opening signals. The C phase closing end and the C phase opening end can form signal output loops with the C phase common end to output C phase closing signals or C phase opening signals. These are all known in the art and will not be described in detail.

[0033] As described above, the voltage transformers and the current transformers can convert high voltage and high current into low voltage and low current, thereby meeting the rated input voltage and the rated input current of the phase change control module. Similarly, the voltage regulating module can regulate the voltage of the external input to meet the rated input voltage of the phase change control module, thereby protecting the phase change control module. Conversely, in other circuit designs, if the external voltage or current is within the rated value of the phase change control module, the voltage regulating module can be omitted. The voltage regulating module in the embodiment is known in the art and will not be described in detail.

[0034] In other embodiments, the number of voltage transformers and current transformers can be one or two according to actual design requirements. The circuits corresponding to different numbers of voltage transformers and current transformers are different, and the specific corresponding relationship is within the scope of the prior art.

[0035] Optionally, the primary sides of the three voltage transformers are connected in parallel.

[0036] Among them, according to the foregoing, it can be known that the utility model adopts a three-phase voltage circuit, generally, three voltage transformers need to be grounded respectively (that is, three voltage transformers are respectively provided with ground wires), three voltage transformers of the embodiment are connected in parallel, three can share a ground wire, thereby reducing the number of wiring and requirements. In contrast, the three current transformers described above are respectively grounded.

[0037] Optionally, the at least one position signal end comprises an A / B position signal end and a C position signal end; the A / B position signal end and the C position signal end are respectively provided with a voltage regulating module.

[0038] Among them, the voltage regulating modules on the A / B phase signal end and the C position signal end in the embodiment are respectively connected with the A / B phase and the C phase of the three-phase pole through normally closed contacts, and the circuit connected with the voltage regulating modules and the A / B phase and the C phase of the three-phase pole is respectively provided with an indicating lamp or a display screen and the like display device, and the display device is used to display the on-off state of the circuit; specifically, it can be understood that the indicating lamp is bright, which means that the corresponding phase is in the closed state when the circuit is connected, and vice versa, which is in the open state; or, the display screen directly displays the closed or open state for state description, realizing the visualization of monitoring. It should be noted that the A / B phase of the embodiment moves synchronously, so that the two signal ends can be combined, and if the design requires, the two can also be separately provided, which will not be repeated here.

[0039] Optionally, the integrated opening and closing operation further comprises a protection tripping end; the protection tripping end is provided with a voltage regulating module.

[0040] Among them, similarly, the isolation vacuum circuit breaker is provided with a protection switch for protection tripping, and the voltage regulating module of the embodiment is connected with the circuit of the protection switch through normally closed contacts, and the circuit connected with the voltage regulating module and the protection switch is provided with an indicating lamp or a display screen and the like display device, and the display device is used to display the on-off state of the protection switch circuit, specifically, the protection switch is in the on state when the protection switch is closed, and in the off state when the protection switch is opened.

[0041] Optionally, the signal integration further comprises a working position signal end, a test position signal end and a ground knife signal end; the working position signal end, the test position signal end and the ground knife signal end are respectively provided with a voltage regulating module.

[0042] In the embodiment, the three-phase pole column of the isolation vacuum circuit breaker is connected with the connecting contact when rotating to the vertical state (working position) and is disconnected from the connecting contact when rotating to the horizontal state (test position). The working position signal end is used for receiving the state signal of the position of the isolation vacuum circuit breaker connected with the connecting contact, and the test position signal is used for receiving the state signal of the position of the isolation vacuum circuit breaker disconnected from the connecting contact and reaching the specified isolation position. The ground knife signal end is used for receiving the signal of the closing or opening of the ground knife. When the operator performs the maintenance operation of the handcart type vacuum circuit breaker on the equipment site, the ground knife must be grounded according to the operation requirement of the high-voltage site, and all the other closing operations such as the on-site closing are invalid.

[0043] For example, the working position signal end voltage regulating module is connected with the working circuit of the handcart through the normally closed contact. The circuit connected with the working circuit has an indicating lamp or a display screen and the like display device. The display device is used for displaying the on-off state of the protection circuit. Specifically, the working circuit is in the on state when being closed and is in the off state when being opened. The relevant connections of the circuits of the other two test position signal ends and the ground knife signal end are referred to the working position signal end, and will not be described here.

[0044] Optionally, the phase change control module is further provided with a power input end.

[0045] The power input end of the phase change control module can be connected with the required power supply through a wire to ensure the normal operation, which is the prior art and will not be described here.

[0046] Optionally, the phase change control module is further provided with a communication interface output end.

[0047] The communication interface output end is used for connecting the optical fiber or the communication interface to various required detection devices, which include but are not limited to a background display. The background display is used for displaying the states of various lines or devices to monitor the whole vacuum circuit breaker. This is the prior art and will not be described here.

[0048] In order to facilitate the understanding of the overall working logic of the phase control control device, the vacuum circuit breaker system is introduced for description. The isolation vacuum circuit breaker system includes the phase control control device, a vacuum circuit breaker, three connecting contacts, a control input module, a signal input module, a circuit breaker control module, a communication module and a battery module. In the prior art, the vacuum circuit breaker includes three-phase pole columns for connecting with the three connecting contacts. The three-phase pole columns are arranged on a rotating longitudinal beam. The rotating longitudinal beam has two states of vertical and horizontal. The rotating longitudinal beam rotates by 90° between the two positions. Specifically, the three-phase pole columns are connected with the connecting contacts when being in the vertical state (non-isolation state) and are disconnected from the connecting contacts when being in the horizontal state (isolation state).

[0049] Firstly, Ua, Ub and Uc are connected to the three-phase voltage circuit, IA, IA1, IB, IB1, IC and IC1 are connected to the three-phase current circuit, and the above are input voltage and current through voltage transformer and current transformer to input certain voltage and current to the phase change control module. The phase change control module is provided with A / B phase closing end, A / B phase opening end, C phase closing end and C phase opening end, which are respectively connected to the circuit breaker control module through the line, and the circuit breaker control module is connected to the vacuum circuit breaker to control the on-off state of the vacuum circuit breaker. According to the prior art, the vacuum circuit breaker is provided with A / B phase output shaft and C phase output shaft, and when the line of A / B phase closing end or A / B phase opening end is closed, the A / B phase output shaft generates a specified action. When the line of C phase closing end or C phase opening end is closed, the C phase output shaft generates a specified action. It should be noted that the selection of the above-mentioned phase action must be based on the condition that the vacuum circuit breaker is in the closing state (the arc chamber of the vacuum circuit breaker is in the closing state), and the vacuum circuit breaker is connected with the connecting contact (non-isolation state). The above-mentioned input, control and action process all belong to the prior art, and will not be repeated here.

[0050] The key point of the above steps is that when the arc chamber is in the closing state, the display device of the A / B position signal end and the C position signal end prompts the closing signal, and when the arc chamber is in the opening state, the display device of the A / B position signal end and the C position signal end prompts the opening signal

[0051] Further, generally, the vacuum circuit breaker is provided with a protection device, when the local closing operation is implemented, the display device on the local closing end circuit prompts the closing signal, if the vacuum circuit breaker has abnormal conditions such as excessive current, the protection of the vacuum circuit breaker is closed, the circuit of the protection trip end of the phase change control module is closed, and the display device on the circuit prompts the closing signal. If the local opening operation is implemented, the display device on the local opening end circuit prompts the opening signal.

[0052] Further, it can be known that the existing isolation vacuum circuit breaker has the function of disconnecting switch, and the vacuum circuit breaker is connected with the connecting contact (working position) or separated by rotating the pole column by 90°. It should be noted that the circuit breaker in the working position is in the environment of high-voltage circuit, and before the worker enters the working site, the vacuum circuit breaker in the working position of the pole column is locally tripped in the normal step by the foregoing mode, and before the pole column moves to the test position, the longitudinal beam is rotated by 90° to rotate the three-phase pole column of the vacuum circuit breaker from the vertical state to the horizontal state (the isolation state of the vacuum circuit breaker), so as to ensure the safety of the operator. In addition, in the foregoing, after the tripping operation is completed, the worker needs to ground the grounding knife before entering the live area to work, at this time, if the three-phase pole column is in the vertical state (the non-isolation state of the isolation vacuum circuit breaker), the local closing end cannot input the closing signal, if the three-phase pole column is in the horizontal state (the isolation state of the isolation vacuum circuit breaker) at this time, the closing signal of the local closing end can be selected to allow transmission to the phase change control module, or can be selected not to allow transmission, which can be designed according to the design requirement, and of course, the preferred one is not to allow, so that the safety level is higher.

[0053] In summary, when located in the working position, the display device on the working position signal end sends a prompt signal, and vice versa, and the test position signal end is the same. Further, the grounding of the grounding knife corresponds to the display device sending a prompt signal, and vice versa.

[0054] In addition, the above-mentioned limiting device can be integrated on the display box for centralized monitoring.

[0055] In addition, in the foregoing recorded voltage regulating module, the voltage regulating module in the utility model converts the input loop signal of 220V into a weak current signal (3.3V) for the protection of the circuit board where the phase change control module is located; the circuit thereof is a voltage regulating circuit 10, as shown in Figure 2 The voltage regulating circuit 10 comprises an optical coupling isolator U1 and a current limiting resistor R1, the input end RD0 of the light-emitting diode of the optical coupling isolator U1 is connected in series with the current limiting resistor R1, the current limiting resistor R1 is connected to the positive pole of the external voltage (220V), the output end of the light-emitting diode is connected to the negative pole of the external voltage (220V), the collector of the triode of the optical coupling isolator U1 is connected to the phase change control module, and the emitter is grounded. In the embodiment, the voltage regulating circuit converts the power grid voltage signal, uses the optical coupling to perform voltage isolation through the current limiting resistor R1, and then outputs a low level to the phase change control module. Of course, the voltage regulating module is a commonly used module in the circuit, and the foregoing voltage regulating module is only an example and is not used as a limitation.

[0056] In addition, according to the foregoing, as shown in Figure 1The voltage regulating module is arranged on the local closing terminal, the local opening terminal, the protection tripping terminal, the A / B position signal terminal, the C position signal terminal, the working position signal terminal, the test position signal terminal and the ground knife signal terminal, the input ends RD0 of the light emitting diodes of the voltage regulating modules of the terminals are connected in parallel to form an input end 101, the input ends are connected in parallel to form an output end 102, the input end 101 is connected to the positive pole of 220V voltage, and the output end 102 is connected to the negative pole of 220V voltage.

[0057] The technical means disclosed by the utility model scheme is not limited to the technical means disclosed by the above-mentioned embodiments, and also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. An isolated vacuum circuit breaker phase control device, characterized by, The phase change control module is provided with a voltage signal input end for accessing a voltage signal, a current signal input end for accessing a current signal, and a phase signal output end for outputting a phase signal; And the phase change control module is further provided with at least one of integrated on-off operation and signal integration; The integrated on-off operation includes a local closing end and a local opening end; The signal integration includes at least one position signal end; The local closing end, the local opening end, and the position signal end are respectively provided with a voltage regulating module.

2. The phase controlled control device for an isolated vacuum circuit breaker according to claim 1, characterized in that, The voltage signal input end includes three voltage transformers, the primary sides of the three voltage transformers are respectively connected to an external three-phase voltage circuit, the secondary sides of the three voltage transformers are connected to a main controller, and the three voltage transformers correspond to voltage input ends Ua, Ub, and Uc respectively; And / or, the current signal input end includes three current transformers, the primary sides of the three current transformers are respectively connected to an external three-phase current circuit, the secondary sides of the three current transformers are connected to a main controller, and the three current transformers correspond to current input ends IA, IA1, IB, IB1, IC, and IC1 respectively; The phase signal output end includes A / B phase common ends, A / B phase closing ends, A / B phase opening ends, C phase common ends, C phase closing ends, and C phase opening ends.

3. The phase controlled control device for an isolated vacuum circuit breaker according to claim 2, characterized in that, The primary sides of the three voltage transformers are connected in parallel.

4. The phase controlled control device for an isolated vacuum circuit breaker according to claim 1, characterized by, The at least one position signal end includes A / B position signal ends and C position signal ends; The A / B position signal ends and the C position signal ends are respectively provided with voltage regulating modules.

5. The vacuum circuit breaker phase control device of claim 1, wherein, The integrated on-off operation further includes a protection tripping end; The protection tripping end is provided with a voltage regulating module.

6. The phase controlled control device for an isolated vacuum circuit breaker according to claim 1, characterized by, The signal integration further includes working position signal ends, test position signal ends, and ground knife signal ends; The working position signal ends, the test position signal ends, and the ground knife signal ends are respectively provided with voltage regulating modules.

7. The phase controlled control device for an isolated vacuum circuit breaker according to claim 1, characterized by, The phase change control module is further provided with a power input end.

8. The phase controlled control device for an isolated vacuum circuit breaker according to claim 1, characterized in that, The phase change control module is further provided with a communication interface output end.

9. The phase-controlled control device of the isolated vacuum circuit breaker according to any one of claims 1 to 8, characterized in that, The voltage regulating module includes a voltage regulating circuit; The voltage regulating circuit includes an optical coupling isolator and a current limiting resistor, the optical coupling isolator includes a light-emitting diode and a transistor, the input end of the light-emitting diode is connected in series with the current limiting resistor, the current limiting resistor is connected to the positive pole of an external voltage, the output end of the current limiting light-emitting diode is connected to the negative pole of the external voltage, the collector of the transistor is connected to the phase change control module, and the emitter is grounded.

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