CN113589044A - Automatic signal switching device for primary and secondary fusion detection equipment - Google Patents
Automatic signal switching device for primary and secondary fusion detection equipment Download PDFInfo
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- CN113589044A CN113589044A CN202110852818.6A CN202110852818A CN113589044A CN 113589044 A CN113589044 A CN 113589044A CN 202110852818 A CN202110852818 A CN 202110852818A CN 113589044 A CN113589044 A CN 113589044A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The invention provides a signal automatic switching device of a primary and secondary fusion detection device, which comprises a voltage channel switching module, a current channel switching module and an input and output channel switching module of switching value, wherein the voltage channel switching module comprises a three-phase four-wire voltage loop, used for realizing the transmission of voltage signals and realizing the free switching between voltages by using an alternating current contactor, the current channel switching module comprises a three-phase four-wire current loop, used for realizing the transmission of current signals and realizing the free switching between currents by using a mode that an NMOS tube is connected in series with a PMOS tube, an input/output channel switching module of switching value is used for transmitting high and low level signals, the invention has unique structure, is realized by using the AC contactor and the MOS tube, and has the advantages of quick switching action, small volume and convenient control.
Description
Technical Field
The invention relates to the technical field of power distribution equipment detection, in particular to a signal automatic switching device of primary and secondary fusion detection equipment.
Background
Traditional distribution network switchgear, once measure and the separation of secondary measurement, produce by different producers and make, when the on-the-spot connection is used, can take a large amount of time to communicate and debug, and the stability of using also can't guarantee moreover. Therefore, in recent years, due to the disadvantages of the conventional power distribution equipment, the primary and secondary power distribution network integration equipment has become an indispensable device in the power distribution system.
At present, the primary and secondary fusion detection equipment for the power distribution network comprises three detection modes, namely primary measurement, secondary measurement and complete measurement. In all testing processes, the included lines comprise a voltage line, a current line, a switch line and a communication line, and in the primary and secondary fusion testing process of the power distribution network, wiring is very important and can not make mistakes. Therefore, before the primary and secondary fusion test process of the power distribution network, the line must be connected, and the line cannot be changed in the test process, so that the switching device is needed to freely switch the line channel to cooperate with the test. The invention relates to a design and use of a signal automatic switching device of a primary and secondary fusion detection device of a power distribution network.
Disclosure of Invention
The invention discloses a signal automatic switching device of a primary and secondary fusion detection device, which is used for completing switching actions by using a relay, has large volume and long switching action time of the relay, and needs corresponding hardware circuits for matching and completing control.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a two times fuse automatic auto-change over device of check out test set signal which characterized in that: the switching circuit comprises a voltage channel switching module, a current channel switching module and an input/output channel switching module of switching value; the voltage channel switching module comprises a three-phase four-wire voltage loop and is used for realizing transmission of voltage signals, and is characterized in that the voltage signals are large in voltage and small in current, and free switching between voltages is realized by using an alternating current contactor, wherein the voltage signals comprise A-phase voltage signals, B-phase voltage signals, C-phase voltage signals and zero-sequence voltage signals; the current channel switching module comprises a three-phase four-wire current loop and is used for realizing transmission of current signals, and is characterized by small voltage and large current, and free switching between currents is realized by using a mode that an NMOS (N-channel metal oxide semiconductor) tube is connected with a PMOS (P-channel metal oxide semiconductor) tube in series, wherein the current signals comprise an A-phase current signal, a B-phase current signal, a C-phase current signal and a zero-sequence current signal, and the mode that the NMOS tube is connected with the PMOS tube in series can play a role in parallel current sharing and reducing the influence of diodes inside the MOS tube; the input and output channel switching module of the switching value is used for transmitting high and low level signals and realizing free switching between input and output signals by using the alternating current contactor, wherein the input and output signals comprise a closing state signal, an opening state signal, an energy storage state signal, a closing signal, an opening signal and an energy storage signal.
As a further improvement of the invention, the alternating current contactor adopts a new generation technical platform, applies automatic production and detection equipment, has small volume, high switching speed, convenient use and preferential quality, the rated insulation voltage can reach 690V, the rated working voltage is 380-660V, the appointed heating current can reach 50A, and the mechanical life can reach 1000 ten thousand times; the alternating current contactor is provided with 4 pairs of contacts and respectively controls the on-off of A phase voltage, B phase voltage, C phase voltage and zero sequence voltage, and the on-off control of the alternating current contactor 4 on electric shock is completed by a weak current coil in the alternating current contactor; the alternating current contactor is a CJX2s-38N alternating current contactor.
As a further improvement of the present invention, the present invention can realize the free switching of the 8-channel signal channel in the electromagnetic convergence terminal and the free switching of the 2-channel signal channel in the electronic convergence terminal. Each signal channel in the electronic fusion terminal or the electromagnetic fusion terminal comprises a voltage signal, a current signal and an input/output signal of a switching value.
As a further improvement, the invention can realize one-time wiring and uninterrupted test of 8 electromagnetic fusion terminals; the invention uses the communication protocol to complete the channel switching through the MCU.
Compared with the prior art, the invention has the beneficial effects that: the structure is unique, the AC contactor and the MOS tube are used for realizing, and the switching device has the advantages of fast switching action, small size and simple control.
Drawings
FIG. 1 is a schematic diagram of the CJX2s-38N AC contactor wiring used in the present invention.
Fig. 2 is a wiring layout of the current loop of the present invention.
Fig. 3 is an input circuit diagram of each channel in the present invention.
Fig. 4 is a circuit diagram of an electromagnetic convergence terminal in the present invention, wherein, taking the channel 1 as an example, a black solid line represents a primary side test circuit, a black dotted line represents a secondary side test circuit, and a black dotted line represents a packaged test circuit.
Fig. 5 is a circuit diagram of an electronic convergence terminal of the invention, in which, taking channel 1 as an example, a solid black line represents a primary side test circuit, a dashed black line represents a secondary side test circuit, and a dashed black line represents a packaged test circuit.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
As shown in the figure, the automatic signal switching device for the primary and secondary fusion detection equipment comprises a voltage channel switching module, a current channel switching module and an input/output channel switching module of switching value; the voltage channel switching module comprises a three-phase four-wire voltage loop and is used for realizing transmission of voltage signals, and is characterized in that the voltage signals are large in voltage and small in current, and free switching between voltages is realized by using an alternating current contactor, wherein the voltage signals comprise A-phase voltage signals, B-phase voltage signals, C-phase voltage signals and zero-sequence voltage signals; the current channel switching module comprises a three-phase four-wire current loop and is used for realizing transmission of current signals, and is characterized by small voltage and large current, and free switching between currents is realized by using a mode that an NMOS (N-channel metal oxide semiconductor) tube is connected with a PMOS (P-channel metal oxide semiconductor) tube in series, wherein the current signals comprise an A-phase current signal, a B-phase current signal, a C-phase current signal and a zero-sequence current signal, and the mode that the NMOS tube is connected with the PMOS tube in series can play a role in parallel current sharing and reducing the influence of diodes inside the MOS tube; the input and output channel switching module of the switching value is used for transmitting high and low level signals and voltage signals and realizing free switching between input and output signals by using the alternating current contactor, wherein the input and output signals comprise a closing state signal, an opening state signal, an energy storage state signal, a closing signal, an opening signal and an energy storage signal.
In the embodiment, the alternating current contactor adopts a new-generation technical platform, automatic production and detection equipment is applied, the alternating current contactor is small in size, high in switching speed, convenient to use and preferential in quality, rated insulation voltage can reach 690V, rated working voltage is 380-660V, heating current can reach 50A by convention, and mechanical life can reach 1000 ten thousand times; the alternating current contactor is provided with 4 pairs of contacts and respectively controls the on-off of A phase voltage, B phase voltage, C phase voltage and zero sequence voltage, and the on-off control of the alternating current contactor 4 on electric shock is completed by a weak current coil in the alternating current contactor; the alternating current contactor is a CJX2s-38N alternating current contactor.
In this embodiment, the present invention can realize the free switching of 8 signal channels in the electromagnetic convergence terminal and the free switching of 2 signal channels in the electronic convergence terminal, wherein each signal channel in the electronic convergence terminal or the electromagnetic convergence terminal includes an input/output signal of a voltage signal, a current signal, and a switching value.
In the embodiment, the invention can realize one-time wiring and uninterrupted test of 8 electromagnetic fusion terminals; the invention uses protocol to complete channel switching through MCU, all switch control is realized by internal CPU, the control protocol content of automatic switching device includes: the system comprises a mutual inductor test mode, a complete set test mode, an electronic terminal test mode and an electromagnetic terminal test mode; the electromagnetic terminal test mode can select 1-8 channels.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (8)
1. The utility model provides a two times fuse automatic auto-change over device of check out test set signal which characterized in that: the switching circuit comprises a voltage channel switching module, a current channel switching module and an input/output channel switching module of switching value;
the voltage channel switching module comprises a three-phase four-wire voltage loop and is used for realizing transmission of voltage signals, and free switching between voltages is realized by using an alternating current contactor, wherein the voltage signals comprise an A-phase voltage signal, a B-phase voltage signal, a C-phase voltage signal and a zero-sequence voltage signal;
the current channel switching module comprises a three-phase four-wire current loop and is used for realizing transmission of current signals, and free switching between currents is realized in a mode that an NMOS (N-channel metal oxide semiconductor) tube is connected with a PMOS (P-channel metal oxide semiconductor) tube in series, wherein the current signals comprise an A-phase current signal, a B-phase current signal, a C-phase current signal and a zero-sequence current signal;
the input and output channel switching module of the switching value is used for transmitting high and low level signals and realizing free switching between input and output signals by using the alternating current contactor, wherein the input and output signals comprise a closing state signal, an opening state signal, an energy storage state signal, a closing signal, an opening signal and an energy storage signal.
2. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 1, wherein: the rated insulation voltage of the alternating current contactor can reach 690V, the rated working voltage is 380-660V, the appointed heating current can reach 50A, and the mechanical life can reach 1000 ten thousand times.
3. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 1, wherein: the alternating current contactor has 4 pairs of contacts and respectively controls the on-off of A phase voltage, B phase voltage, C phase voltage and zero sequence voltage, and the on-off control of the alternating current contactor 4 to electric shock is completed by a weak current coil in the alternating current contactor.
4. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 1, wherein: the alternating current contactor is a CJX2s-38N alternating current contactor.
5. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 1, wherein: the free switching of 8-channel signal channels in the electromagnetic fusion terminal and the free switching of 2-channel signal channels in the electronic fusion terminal are realized.
6. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 5, wherein: each channel in the electronic fusion terminal or the electromagnetic fusion terminal comprises a voltage signal, a current signal and an input/output signal of a switching value.
7. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 5, wherein: one-time wiring can be realized, and 8 electromagnetic fusion terminals are subjected to uninterrupted test.
8. The automatic signal switching device for the primary and secondary fusion detection equipment according to claim 1, wherein: the channel switching is accomplished by the MCU using a communication protocol.
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| CN202110852818.6A CN113589044A (en) | 2021-07-27 | 2021-07-27 | Automatic signal switching device for primary and secondary fusion detection equipment |
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| CN202110852818.6A CN113589044A (en) | 2021-07-27 | 2021-07-27 | Automatic signal switching device for primary and secondary fusion detection equipment |
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2021
- 2021-07-27 CN CN202110852818.6A patent/CN113589044A/en active Pending
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Effective date of registration: 20211214 Address after: No.1, Powell Road, Jiangning District, Nanjing, Jiangsu Province, 210000 Applicant after: JIANGSU ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Applicant after: Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd Address before: No.1, Powell Road, Jiangning District, Nanjing, Jiangsu Province, 210000 Applicant before: STATE GRID JIANGSU ELECTRIC POWER COMPANY Research Institute |