CN205665555U - Regulator cubicle door fault indication device - Google Patents

Abstract

Electrical cabinet door fault indication device. It relates to the field of electric equipment, in particular to a fault indicating device and a working method thereof. Provided is an electric cabinet door fault indicating device and a working method thereof, which can visually display the locking state of the rear cabinet door of the distribution box on a panel and cannot realize the closing action if the rear cabinet door of the distribution box is not locked. The pulse generator is fixed inside the power distribution cabinet and connected to the controller; the pressure sensor is fixed on the rear cabinet door of the power distribution cabinet and connected to the controller to transmit the collected pressure data to the controller. The controller includes a central processing unit, a memory, a signal transmitter and an IO port; the memory and the IO ports are respectively connected to the central processing unit, and the signal transmitter is connected to the central processing unit through the IO port The utility model is safe and reliable, guarantees personal safety, and maintains the safety and stability of the power grid.

Description

Electrical cabinet door fault indication device

technical field

The utility model relates to the field of electric equipment, in particular to a fault indicating device and a working method thereof.

Background technique

With the development of economy and society, the role of electricity has become more and more prominent, and more and more electricity safety problems have been brought about. Therefore, electric equipment needs to be repaired and maintained regularly. Generally, electric equipment is placed in the distribution box of the substation. The electrical box is designed with double doors and requires two people to operate. One person replaces the device at the front door during maintenance, and one person performs wiring from the rear cabinet door. After the maintenance is completed, the rear cabinet door needs to be closed and locked to ensure that the power distribution is in an insulated state before it can be closed. The normal closing test without knowing the state of the rear cabinet door leads to frequent electric shock accidents, which brings great safety hazards and also affects the safety and stability of the power grid.

The State Intellectual Property Office published a utility model patent application on February 26, 2014 (application number: 2013105275932, name: distribution box fault indicator), which specifically discloses including relay switches, indicator lights and wiring. The circuit breaker and the knife melt are respectively connected to the relay switch, and the indicator lights are controlled by the relay switch. There are five indicator lights, and three of the indicator lights are connected in series with the corresponding relay switches of the knife melt to form a knife melt fault indication. Branch circuit, three knife gate melt fault indication branches are connected in series after an indicator light is connected in series, and the other indicator light is connected in series with the corresponding relay switch of the circuit breaker; the beneficial effect of the utility model distribution box fault indicator: a relay The indicator light structure displays the internal faults of the distribution box outside the distribution box, which simplifies the troubleshooting process and reduces the time for restoring power supply. However, the fault indication mentioned in this utility model refers to the function of indicating when the components inside the distribution box fail, and it does not address the disadvantages of safety accidents such as electric shocks caused by the failure of the rear cabinet door of the distribution box to be locked properly. .

Utility model content

Aiming at the above problems, the utility model provides an electrical cabinet door failure that can make the locking state of the rear cabinet door of the distribution box visually displayed on the panel and the closing action cannot be realized without locking the rear cabinet door of the distribution box. Indicating device and method of operation thereof.

The technical solution of the utility model is: the electrical cabinet door fault indicating device, including a controller, a pressure sensor, a pulse generator, a red indicator light and a green indicator light, and the red indicator light and the green indicator light are respectively arranged inside the power distribution cabinet on the device board and connected to the pulse generator respectively;

The pulse generator is fixed inside the power distribution cabinet and connected to the controller;

The pressure sensor is fixed on the rear cabinet door of the power distribution cabinet and connected to the controller, and transmits the collected pressure data to the controller.

The controller includes a central processing unit, a memory, a signal transmitter and an IO port;

The memory and the IO port are respectively connected to the central processing unit, and the signal transmitter is connected to the central processing unit through the IO port;

The IO port is also connected to the pulse generator;

The signal transmitter is also connected to the pressure sensor for transmitting the collected pressure signal;

The memory is also connected to a host computer for reading and writing data to the memory.

It also includes an anti-mistouch device, which includes a ground wire and an AC contactor, and the AC contactor includes a coil, a normally closed contact associated with the coil, and a normally open contact associated with the coil;

The normally closed contact is set on the ground wire to control the on-off of the ground wire;

The grounding wire is connected to the incoming line end of the power distribution cabinet; so that the incoming line end can be directly grounded;

The normally open contact is arranged on the incoming line end of the electrical cabinet to control the on-off of the electrical components in the entire electrical cabinet;

The coil is connected with the pulse generator, and the on-off of the normally open contact and the normally closed contact is controlled by the coil.

It also includes a hydraulic device, the hydraulic device is fixed in the power distribution cabinet, and the push rod of the hydraulic device is fixedly connected to the rear cabinet door of the power distribution cabinet;

An electromagnetic switch is provided on the hydraulic device, and the electromagnetic switch is connected to the IO port.

In the utility model, the pressure sensor is used to detect the pressure value when the cabinet door is normally locked, and this pressure value is input into the controller as a reference value. Under the action of the point, the incoming line end of the power distribution cabinet is forcibly disconnected, that is, the power supply of the entire power distribution cabinet is disconnected to prevent accidental closing and cause safety accidents, and the grounding wire is connected to the power distribution cabinet in time, even if the AC contact The normally open contacts of the switch do not act or act with a delay. In the case of false closing, the circuit in the power distribution cabinet will be in a grounding short circuit state, causing it to trip due to a large current, avoiding safety accidents such as electric shock, and making it easier to operate during maintenance. The power distribution cabinet is safer and more reliable during the process.

In the utility model, the pressure value when the cabinet door is normally locked is used as a reference value, and the pressure value measured under the abnormally locked state of the cabinet door is lower than the reference value. At this time, the pulse generator sends a pulse with a voltage of -5V , so that the red light is always on when it is powered on, thus reminding the maintenance personnel that the rear cabinet door is abnormally locked, so that the maintenance personnel can check the status of the rear cabinet door and perform maintenance in time, and at the same time avoid the maintenance personnel from going back and forth between the front and rear cabinet doors many times, saving maintenance time , liberate the labor force and improve maintenance efficiency. Reduce the occurrence of safety accidents caused by abnormal locking of the rear cabinet door, ensure personal safety, and maintain the safety and stability of the power grid.

The utility model is also equipped with a hydraulic device. When the maintenance personnel fail to lock the rear cabinet door after several attempts, the hydraulic device will work immediately to forcibly lock the rear cabinet door. The pressure sensor detects that the pressure is normal, so that the maintenance personnel can close the door in time. switch, restore the normal operation of the power distribution cabinet, and ensure the safe and stable operation of the power grid.

Description of drawings

Fig. 1 is a three-dimensional view one of the utility model using state,

Fig. 2 is that the utility model use state is three-dimensional view two,

Fig. 3 is the utility model circuit connection schematic diagram,

Fig. 4 is the electrical schematic diagram of the utility model control circuit,

Fig. 5 is the block diagram of connection structure of the present utility model,

Fig. 6 is a work flow diagram of the utility model;

11 is a normally open contact, 12 is a normally closed contact, 13 is a coil,

21 is the grid busbar, 22 is the incoming line terminal, 23 is the ground wire,

31 is a green indicator light, 32 is a red indicator light,

41 is a front cabinet door, and 42 is a rear cabinet door,

5 is a pressure sensor, 6 is a hydraulic device, and 7 is an electric switch.

detailed description

As shown in Figure 1-6, the utility model includes a controller, a pressure sensor, a pulse generator, a red indicator light and a green indicator light, and the red indicator light and the green indicator light are respectively arranged on the device board inside the power distribution cabinet and respectively connected with the pulse generator; the pulse generator is fixed inside the power distribution cabinet and connected with the controller; the pressure sensor is fixed on the rear cabinet door of the power distribution cabinet and connected with the control connected to the controller and transmit the collected pressure data to the controller. The red indicator light and the green indicator light can make the maintenance personnel at the front cabinet door intuitively understand the locking status of the rear cabinet door and make timely disposal. Even if the internal maintenance of the power distribution cabinet is completed, the maintenance personnel can lock the rear cabinet door The indication of the state judges whether to close the switch (that is, to close the switch). The personal safety of the maintenance personnel is protected, and at the same time, the maintenance personnel are prevented from repeatedly going back and forth between the front and rear cabinet doors, which saves maintenance time, liberates labor force, and improves maintenance efficiency.

The red indicator light and the green indicator light are preferably light-emitting diodes, the negative pole of the red indicator light is connected to the output end of the pulse generator, the positive pole of the red indicator light is connected to the input end of the pulse generator, and the positive pole of the green indicator light is connected to the output terminal of the pulse generator. The output terminal is connected, the negative pole of the green indicator light is connected to one end of the coil, and the other end of the coil is connected to the input end of the pulse generator to form a circuit loop. When the pulse generator sends a DC voltage of +5V, the green indicator light is on and the coil is activated Electricity, when the pulse generator sends a DC voltage of -5V, due to the forward conduction characteristics of the light-emitting diode, the green indicator light is off and the coil is de-energized, and the red indicator light is on. The maintenance personnel at the front cabinet door can intuitively understand the locking state of the rear cabinet door and make timely disposal.

The controller includes a central processing unit, a memory, a signal transmitter and an IO port; the memory and the IO ports are respectively connected to the central processing unit, and the signal transmitter is connected to the central processing unit through the IO port The IO port is also connected to the pulse generator; the signal transmitter is also connected to the pressure sensor for transmitting the collected pressure signal; the memory is also connected to the host computer for sending The memory reads and writes data.

The pressure sensor detects the pressure value of the rear cabinet door of the power distribution cabinet under normal conditions, and then writes it into the memory through the host computer as a comparison value. When the utility model works normally, the pressure sensor transmits the detected pressure value information through the signal transmitter into an electrical signal that can be recognized by the controller, and transmits the electrical signal to the controller, and performs calculations inside the controller, and communicates with the memory After comparing the comparison values stored in the controller, the controller sends corresponding instructions according to the comparison results, and transmits them to various external devices (such as pulse generators, electromagnetic switches) through the IO port, and the external devices directly connected to the IO port control each Terminals (red light, green light, AC contactor).

The controller judges the locked state of the rear cabinet door through the comparison of the pressure value. When the cabinet door is not locked normally, the red indicator light on the panel of the power distribution cabinet is always on, reminding the maintenance personnel to lock the rear cabinet door as soon as possible. At the same time, it also reminds the maintenance personnel that they cannot close the switch at this time, avoiding safety accidents such as electricity, ensuring the personal safety of the maintenance personnel, maintaining the safe and stable operation of the power grid, avoiding the maintenance personnel from going back and forth between the front and rear cabinet doors many times, and saving maintenance time. Liberate the labor force and improve maintenance efficiency.

It also includes an anti-mistouch device, which includes a ground wire and an AC contactor, and the AC contactor includes a coil, a normally open contact and a normally closed contact, and the normally open contact and the normally closed contact Associated with the coil (when the coil is energized, the normally open contact is closed, and the normally closed contact is opened; when the coil is de-energized, the normally open contact is opened, and the normally closed contact is closed). Its purpose is to use the gain (loss) state of the coil to control the on-off of the normally open contact and the normally closed contact associated with the coil, so as to control the on-off state of the power distribution cabinet and ensure that the power distribution cabinet is in the maintenance process. It will not be mistakenly closed and connected to the power grid, which will avoid safety accidents to ensure safety, and also maintain the safety and stability of the power grid.

A normally closed contact is arranged on the grounding wire to control the on-off of the grounding wire; the grounding wire is connected to the incoming line end of the power distribution cabinet, so that the incoming line end can be directly grounded. During the maintenance process, the normally closed contact is always in the closing state, and the grounding wire is connected to the incoming line terminal of the power distribution cabinet (the part directly connected to the power grid). The entire power distribution cabinet is in a short-circuit state. Even if it is closed by mistake, it can trip in a short time, ensuring that the power distribution cabinet is always in a power-off state during the maintenance process, and ensuring the personal safety of the maintenance personnel.

The normally open contact is set on the incoming line end of the electrical cabinet to control the on-off of the electrical components in the entire electrical cabinet. During the maintenance process, the normally open contact is always in the disconnected state. The direct connection part) is disconnected from the power grid, so that the entire power distribution cabinet is in a power-off state. Even if it is closed by mistake, the power distribution cabinet will not be charged, ensuring that the power distribution personal safety of personnel. The normally open contact and the ground wire complement each other. When one of them fails, the other can also ensure that the power distribution cabinet in the maintenance state will not be charged, which improves the safety of the power distribution cabinet and ensures the personal safety of the maintenance personnel. .

The coil is connected to the pulse generator. When the pulse generator sends a DC voltage of +5V (the green indicator light is on), it means that the maintenance is completed, and the front and rear cabinet doors are locked. At this time, the coil is energized, the normally closed contact is opened, and the normally open contact is closed, that is, the ground wire is separated from the power distribution cabinet. At this time, the switch is closed, and the power distribution cabinet can be connected to the grid.

It also includes a hydraulic device, the hydraulic device is fixed in the power distribution cabinet, and the push rod of the hydraulic device is fixedly connected with the rear cabinet door of the power distribution cabinet; the hydraulic device is provided with an electromagnetic switch, the The electromagnetic switch is connected to the IO port. After maintenance personnel manually close the rear cabinet door several times, and the controller determines that it is unsuccessful, the controller controls the electromagnetic switch through the IO port, starts the hydraulic device, and forcibly locks the rear cabinet door (that is, the pressure detected by the sensor is higher than or equal to the comparison value), shorten the maintenance time of maintenance personnel and improve efficiency.

The working method of the electrical cabinet door fault indication device works according to the following steps:

1) Write the pressure preset value and frequency value into the memory through the host computer; as the benchmark for the controller to judge; through the setting of the preset value, the utility model can adapt to different working conditions, making the utility model adaptable enhanced.

2) The pressure sensor collects the pressure value of the rear cabinet door and transmits it to the central processing unit through the signal transmitter; the central processing unit is responsible for receiving and processing (that is, reading and comparing relevant preset values) the received data.

3) The central processing unit reads the pressure preset value in the memory and compares it with the collected pressure value. If it is lower than the preset value, go to step 5), if it is higher than the preset value or is equal to the preset value, go to step 4);

4) The rear cabinet door is locked;

4.1) The central processing unit issues instructions to the pulse generator;

4.2) The pulse generator works, and sends out a DC voltage of +5V, and the coil of the AC contactor is energized;

4.3) The green indicator light is on; at this time, the maintenance personnel can intuitively understand the locking situation of the rear cabinet door (the rear cabinet door is locked), and perform the operation of closing (closing the electric switch), so as to end the maintenance as soon as possible to avoid maintenance personnel from repeatedly It travels between the front cabinet door and the rear cabinet door, saving maintenance time and improving maintenance efficiency.

4.4) The normally closed contact is disconnected, the grounding wire is disconnected, the normally open contact of the AC contactor is closed, and the incoming terminal is energized;

4.5) The staff closes the switch, and the power distribution cabinet resumes operation;

5) The rear cabinet door is not locked;

5.1) The central processing unit issues instructions to the pulse generator;

5.2) The pulse generator works and sends out a DC voltage of -5V, and the coil of the AC contactor loses power;

5.3) The red indicator light is on;

5.4) The normally closed contact is closed, the ground wire is connected to the circuit, the power distribution cabinet is in the state of ground short circuit, the normally open contact of the AC contactor is disconnected, and the incoming line terminal loses power, go to step 6); double insurance ensures that during the maintenance process The middle power distribution cabinet is not charged to ensure the safety of maintenance personnel. At the same time, it is linked with the pressure sensor. When the rear cabinet door is not locked and closed, the power distribution cabinet cannot be closed. To ensure that the rear cabinet door must be in the Locked state, to avoid the abnormal locking of the rear cabinet door of the power distribution cabinet and the live operation of the power distribution cabinet, to ensure the safe operation of the power distribution cabinet and reduce the probability of safety accidents;

6) Close and lock the rear cabinet door;

6.1) The staff manually closes the rear cabinet door;

6.2) The pressure sensor re-collects the pressure value of the cabinet door;

6.3) Judging whether the rear cabinet door is locked well, if it is locked well, re-acquire the pressure value and compare it with the preset value, if it reaches or exceeds the preset value, the central processing unit will give a command to the pulse generator, and the pulse generator will send out 5V Pulse, the green light is on, otherwise go to the next step;

6.4) Compare the number of pressure fluctuations with the preset number recorded in the memory. If it reaches or exceeds three times, the central processor will give an instruction, the electromagnetic switch will be closed, the hydraulic device will work, and the rear cabinet door will be locked forcibly, so that the power distribution cabinet can work normally. Work, done. Improve the maintenance efficiency of maintenance personnel.

Claims (4)

1. Electrical cabinet door fault indication device, including controller, pressure sensor, pulse generator, red indicator light and green indicator light, it is characterized in that, described red indicator light and green indicator light are respectively arranged in the device inside the power distribution cabinet board and respectively connected with the pulse generator; The pulse generator is fixed inside the power distribution cabinet and connected to the controller; The pressure sensor is fixed on the rear cabinet door of the power distribution cabinet and connected to the controller, and transmits the collected pressure data to the controller. 2. The electrical cabinet door fault indicating device according to claim 1, wherein the controller comprises a central processing unit, a memory, a signal transmitter and an IO port; The memory and the IO port are respectively connected to the central processing unit, and the signal transmitter is connected to the central processing unit through the IO port; The IO port is also connected to the pulse generator; The signal transmitter is also connected to the pressure sensor for transmitting the collected pressure signal; The memory is also connected to a host computer for reading and writing data to the memory. 3. The electrical cabinet door fault indication device according to claim 2, characterized in that it also includes an anti-mistouch device, the anti-mistouch device includes a grounding wire and an AC contactor, and the AC contactor includes a coil, and A normally closed contact associated with the coil and a normally open contact associated with the coil; The normally closed contact is set on the ground wire to control the on-off of the ground wire; The grounding wire is connected to the incoming line end of the power distribution cabinet; so that the incoming line end can be directly grounded; The normally open contact is arranged on the incoming line end of the electrical cabinet to control the on-off of the electrical components in the entire electrical cabinet; The coil is connected with the pulse generator, and the on-off of the normally open contact and the normally closed contact is controlled by the coil. 4. The electrical cabinet door fault indication device according to claim 3, further comprising a hydraulic device, the hydraulic device is fixed in the distribution cabinet, and the push rod of the hydraulic device is connected to the distribution cabinet. The rear cabinet door of the electric cabinet is fixedly connected; An electromagnetic switch is provided on the hydraulic device, and the electromagnetic switch is connected to the IO port.