CN201122807Y - Switchgear status indicator - Google Patents

Abstract

The utility model discloses a switch cabinet state indicator, which comprises a display screen, a power supply circuit, a controller connected with a switch cabinet state signal through an electronic multi-way switch, a photoelectric isolation input circuit, and is characterized in that: the controller The input end is connected with the human body induction probe through the electronic multiplex switch and the human body induction module; its output end is connected with the loudspeaker through the voice drive module; The cabinet status input signal sends out a safe operation alarm through the horn. Due to the adoption of the above structure, compared with the prior art, when the mechanical interlock device fails or the operator forcibly violates the regulations, it can effectively realize the prompt and alarm of the misoperation of the circuit breaker handcart, thereby enhancing the operation of the high-voltage switchgear security. The switchgear state indicator has a simple structure, is convenient to manufacture, and is convenient to install and debug.

Description

Switchgear status indicator

technical field

The utility model relates to an electric switch cabinet, in particular to a switch cabinet status indicator.

Background technique

The switchgear status indicator is a new type of multifunctional intelligent analog dynamic indicating device developed according to the development of the current switchgear technology in the medium voltage system. It integrates primary circuit simulation diagram, switch state, circuit breaker position, grounding knife position, spring energy storage state, high voltage live indication and locking, automatic/manual heating and dehumidification, temperature control, and liquid crystal display. These indication functions can be separated or combined, and users can choose according to their needs. This product is matched with the switch cabinet in an integrated layout, which will greatly simplify the panel structure design of the switch cabinet, beautify the panel layout of the switch cabinet, and improve the indication function of the switch cabinet status. Make the circuit status clear at a glance. Therefore, the switchgear status indicator can replace the existing primary circuit analog indicator. In order to prevent equipment and personnel casualties caused by operator misoperation, in the high-voltage switch manufacturing industry, although the technical solution adopted can realize the installation of upper connection between the circuit breaker and the carrying circuit breaker trolley, and between the grounding switch and the carrying circuit breaker trolley lock device. Although this technical scheme can realize that the trolley carrying the circuit breaker cannot move when the circuit breaker is in the closed state, the circuit breaker cannot be closed when the trolley carrying the circuit breaker is between the "working position" and the "experimental position", and can prevent There is an electrical grounding switch and a trolley that carries the circuit breaker when the grounding switch is closed, but the mechanical device is difficult to meet the precision requirements in manufacture, and there must be wear and tear during use, so failures will inevitably occur. If there is no alarm device, the Accidents are bound to happen when interlocks fail.

Utility model content

The technical problem to be solved by the present invention is to provide a switchgear state indicator to achieve the purpose of solving potential safety hazards existing in the work and operation through voice alarms and better ensuring the life safety of operators.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is, a switch cabinet state indicator, including a display screen, a power supply circuit, and a controller connected to the switch cabinet state signal through an electronic multiplex switch and a photoelectric isolation input circuit, It is characterized in that: the input end of the controller is connected with the human body induction probe through the electronic multiplex switch and the human body induction module; the output end is connected with the speaker through the voice drive module; the voice drive module is used to pass The controller receives the input signals of the human body induction module and the state of the switch cabinet respectively, and sends out a safe operation alarm through the horn.

Switchgear state indicator, the switchgear state signal includes high voltage live state signal, grounding knife position signal, circuit breaker position signal, circuit breaker handcart working position signal, circuit breaker handcart test position signal.

The switchgear status indicator, the controller is a single-chip microcomputer, the model is AT89C52PLCC44.

The switchgear status indicator, the model of the voice drive module is AP89042.

A switchgear state indicator, due to the adoption of the above structure, the input end of the controller is connected to the human body induction module and the human body induction probe and the switchgear state signal through the electronic multiplex switch; its output end is connected to the switchgear state signal through the voice drive module Speakers are connected. Compared with the existing technology, when the mechanical interlock device fails or the operator forcibly operates in violation of regulations, it can effectively realize the prompt and alarm of the misoperation of the circuit breaker handcart, thereby enhancing the safety of the high-voltage switchgear operation. The switchgear state indicator has a simple structure, is easy to manufacture, and is convenient to install and debug.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail;

Fig. 1 circuit structure block diagram of the utility model switch cabinet status indicator;

Fig. 2 is a schematic diagram of the input and output signals of the multiplexer shown in Fig. 1;

In Fig. 1 and Fig. 2, 1. Controller; 2. Voice driver module; 3. Human body sensing probe; 4. Human body sensing module; 5. Multiplexer; 6. Speaker; 7. Photoelectric isolation input circuit.

Detailed ways

As shown in Figure 1, a kind of switchgear status indicator, comprises display screen, power supply circuit, controller 1 is connected with switchgear status signal by electronic multiplex switch 5, photoelectric isolation input circuit 7, described controller 1 The input end is connected to the human body induction probe 3 through the electronic multiplex switch 5 and the human body sensing module 4; the output end is connected to the speaker 6 through the voice driving module 2; the model of the voice driving module 2 is AP89042. The voice driving module 2 is used to respectively receive input signals of the human body induction module 4 and the switch cabinet state through the controller 1, and send out a safe operation alarm through the speaker 6. The controller 1 is a single-chip microcomputer, the model is AT89C52PLCC44. The switchgear status signal includes a high-voltage live status signal, a grounding knife position signal, a circuit breaker position signal, a circuit breaker handcart working position signal, and a circuit breaker handcart test position signal. The normal output 5V voltage of the human body sensing module 4 is transmitted to the AT89C58 single-chip microcomputer through the electronic multi-way switch 5. When the human body approaches the switch cabinet within 5 meters, the human body sensing probe 3 senses the change of the surrounding luminosity, and at the same time transmits its luminosity signal through the human body sensing The module 4 is converted into a level change signal from a normal 5V signal to 0V, and the changed signal is transmitted to the single-chip microcomputer through the multi-channel electronic switch 5, and the single-chip microcomputer judges the state of the existing input signal of the switch cabinet after receiving the changed signal and Live status, that is, the position status of the switch cabinet, the position status of the grounding knife, the position status of the handcart carrying the circuit breaker, and the status of high-voltage charging. These signals are converted into 0 to 5V level signals through the photoelectric isolation input circuit 7. These signals are passed through the electronic The multi-way switch 5 transmits to the single-chip microcomputer, and after the single-chip microcomputer makes a corresponding judgment, it sends out a corresponding alarm signal, thus ensuring the reliable and safe operation of the high-voltage switchgear.

Referring to Fig. 2, Fig. 2 is a schematic diagram of the input and output signals of the multiplexer; among them, the S0, S1, and S2 pins of the multiplexer 5 are connected to the single-chip microcomputer, and the high and low levels of S0, S1, and S2 are set by the single-chip microcomputer to control which The first input signal is connected to the ZIN pin. For example, if S0, S1, and S2 are all low, the first input signal is connected to the ZIN pin. If S0, S1 is low and S2 is high, then The second channel is connected to the ZIN pin, and so on, so as to achieve the function of electronic strobe switch. Finally, the input pins 1, 2, 3, 4, 5, 6, and 7 of the multiplexer 5, the position signal of the grounding knife, the position signal of the human body induction, the three-phase live input signal, the working position signal of the circuit breaker handcart, and the circuit breaker The handcart test position signal, the circuit breaker closing position signal, and the circuit breaker opening position signal are respectively input into the single-chip microcomputer through this electronic multiplex switch 5.

The single-chip microcomputer stores the voice alarm software program, and the specific working mode of the voice alarm is as follows:

1. If the circuit breaker is in the closed state at this time, when the handcart carrying the circuit breaker is pushed from the experimental position to the working position by mistake, that is, when there is no signal input to the single chip microcomputer at the working position and the experimental position of the trolley carrying the circuit breaker, the device voice The alarm sends out "Please open the circuit breaker".

2. If the grounding switch is in the closed state at this time, when the trolley carrying the circuit breaker is pushed from the test position to the working position by mistake, that is, when there is no signal input to the single chip microcomputer at the working position and the test position of the trolley carrying the circuit breaker, the voice prompts " Please switch the grounding switch".

3: If the circuit breaker is closed and the grounding switch is closed at this time, when the trolley carrying the circuit breaker is pushed from the test position to the working position by mistake, there will be no signal input to the microcontroller from the working position and the test position of the trolley carrying the circuit breaker , the voice prompts "Please turn on the circuit breaker, please turn on the grounding switch".

4: When the main circuit of the cabinet is powered, that is, when the three-phase live circuit sends a signal to the single-chip microcomputer, if someone stays in front of the cabinet at this time, the voice prompts "the main circuit of the cabinet is charged".

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (4)

1. A switchgear state indicator, comprising a display screen, a power supply circuit, and a controller (1) are connected with the switchgear state signal through an electronic multiplexer (5), a photoelectric isolation input circuit (7), and is characterized in that : the input end of the controller (1) is connected with the human body induction probe (3) through the electronic multiplexer (5), the human body induction module (4); its output end is connected with the loudspeaker ( 6) connected; The voice driving module (2) is used to respectively receive input signals of the human body induction module (4) and the state of the switch cabinet through the controller (1), and send out a safe operation alarm through the speaker (6). 2. The switchgear state indicator according to claim 1, characterized in that: said switchgear state signal includes high-voltage live status signal, grounding knife position signal, circuit breaker position signal, circuit breaker handcart working position signal, Circuit breaker handcart test position signal. 3. The switchgear state indicator according to claim 1, characterized in that: the controller (1) is a single-chip microcomputer, the model is AT89C52PLCC44. 4. The switchgear state indicator according to claim 1, characterized in that: the model of the voice driving module (2) is AP89042.

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