CN111864702A - Device and method for protecting circuit breaker coil - Google Patents

Abstract

The invention discloses a device and a method for protecting a circuit breaker coil, and relates to the technical field of high-voltage electrical equipment maintenance; the device comprises a timing circuit breaker device which is connected in series with a circuit breaker coil and is used for timely disconnecting the circuit breaker coil according to circuit breaking after knowing the conduction current of the circuit breaker coil; the method comprises the steps of timing circuit breaking, wherein circuit breaking timing is preset, and the circuit breaker coil is broken according to the circuit breaking timing after the timing circuit breaking device acquires the conduction current of the circuit breaker coil; the circuit breaker coil is connected in series and used for knowing a timing circuit breaking device and the like for regularly breaking the circuit breaker coil according to circuit breaking after the circuit breaker coil conducts current, so that the circuit breaker coil is protected and is not easy to burn out.

Description

Device and method for protecting circuit breaker coil

technical field

The invention relates to the technical field of overhaul of high-voltage electrical equipment, in particular to a device and method for protecting a circuit breaker coil.

Background technique

High-voltage circuit breakers are important equipment in the power system, and their operational reliability is crucial to the protection and control of the power grid. When the power system is in normal operation, the circuit breaker can connect or cut off the load current; in the event of a short-circuit fault or severe overload of electrical equipment or lines, the circuit breaker can be controlled by the relay protection device to quickly cut off the fault current to prevent the scope of the accident. expansion. In order to ensure the stable and reliable operation of the circuit breaker, the coil used to control opening and closing in the circuit breaker control circuit, hereinafter referred to as the circuit breaker coil, must work reliably and normally.

The circuit breaker coil is the core component in the circuit breaker control circuit. If the coil is energized for a certain period of time, its own calorific value will be too large, which will cause the coil to burn out. In recent years, the number of circuit breaker coil burnouts caused by circuit breaker refusal to operate and insulation aging has shown a rapid upward trend.

The refusal of the circuit breaker to move causes the coil to be energized all the time, resulting in extremely short response and processing time for the operation and maintenance personnel. Coil burning will seriously damage other secondary components and secondary wires in the mechanism box, increasing the repair work time. In addition, serious burn damage can even cause equipment to catch fire, causing irreversible damage to circuit breakers, which not only brings huge economic losses, but also seriously affects the safety of people, power grids and equipment.

Private Internet is the Internet used by the electric utility sector.

Existing technical problems and thinking:

How to solve the technical problem that the circuit breaker coil is fragile.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a device and method for protecting the circuit breaker coil. The circuit breaker coil is connected in series to the circuit breaker coil and is used to know that the circuit breaker coil conducts current and then disconnect the circuit breaker coil according to the circuit breaker timing. , to achieve the protection of the circuit breaker coil, not easy to burn out.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a device for protecting the circuit breaker coil includes a timed circuit breaker that is connected in series to the circuit breaker coil and is used to disconnect the circuit breaker coil according to the circuit breaker timing after learning that the circuit breaker coil conducts current. device.

A further technical solution is: a timing breaking module is further included, which is used for the timing breaking device to obtain the breaking timing, and the timing breaking device disconnects the circuit breaker coil according to the breaking timing after learning that the circuit breaker coil conducts current; the breaking timing is from the circuit breaker. The time from when the coil conducts current to when the circuit breaker coil is disconnected.

A further technical solution is that: the timing circuit breaking device is a time relay.

A further technical solution is: further comprising a current transformer and a signal collector for acquiring current information in the circuit breaker coil, and a current information acquisition module, wherein the current transformer is connected to the signal collector and communicates unidirectionally, and the current information module is acquired , for the signal collector to obtain the current information in the circuit breaker coil through the current transformer.

A further technical solution is as follows: a communication device is further included, the signal collector is connected to the communication device and communicates in one direction to obtain a current information module, and is also used for the signal collector to send current information through the communication device.

A further technical solution is that: the communication device is a wireless communication device.

A further technical solution is as follows: an integrated machine and a display module are further included, the signal collector is connected with the integrated machine and communicates in one direction, and the display module is used for the integrated machine to acquire and display current information.

A further technical solution is: it also includes a power supply device, an interface converter and a POE interface, the timing disconnection device is connected to the power supply device through the first port of the interface converter, and the current transformer is connected through the second port of the interface converter. To the power supply device, the power supply device is connected to the signal collector through the POE interface.

A method for protecting a circuit breaker coil includes the steps of timing circuit breaker, presetting circuit breaker timing, and disconnecting the circuit breaker coil according to the circuit breaker timing after the timing circuit breaking device learns that the circuit breaker coil conducts current.

A further technical solution includes the following steps: the step of acquiring current information, acquiring and sending the current information in the circuit breaker coil; and the step of displaying, receiving and displaying the current information.

The beneficial effects produced by the above technical solutions are:

A device for protecting a circuit breaker coil includes a timed circuit breaking device which is connected in series with the circuit breaker coil and is used to disconnect the circuit breaker coil according to the circuit breaking timing after learning that the circuit breaker coil conducts current. It realizes the protection of the circuit breaker coil by connecting the circuit breaker coil in series and using it to know that the circuit breaker coil conducts current and then disconnects the circuit breaker coil according to the circuit breaker timing.

A method for protecting a circuit breaker coil includes the steps of timing circuit breaker, presetting circuit breaker timing, and disconnecting the circuit breaker coil according to the circuit breaker timing after the timing circuit breaking device learns that the circuit breaker coil conducts current. It realizes the protection of the circuit breaker coil through the steps of timing disconnection and the like, and is not easy to burn out.

For details, please refer to the description in the detailed description.

Description of drawings

1 is a schematic circuit diagram of Embodiment 1 of the present invention;

Fig. 2 is the principle block diagram of Embodiment 2 of the present invention;

Fig. 3 is the principle block diagram of Embodiment 3 of the present invention;

Fig. 4 is the principle block diagram of Embodiment 4 of the present invention;

Fig. 5 is the principle block diagram of Embodiment 5 of the present invention;

Fig. 6 is the principle block diagram of Embodiment 6 of the present invention;

FIG. 7 is a flowchart of Embodiment 7 of the present invention.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present application Similar promotion, therefore, the present application is not limited by the specific embodiments disclosed below.

Example 1:

As shown in FIG. 1 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit breaking timing. The timing circuit breaker is a time relay KT, and the normally closed contact KT-1 of the time relay KT is connected in series with the wire of the circuit breaker coil L.

Among them, the time relay KT itself and the corresponding electrical connection technology are in the prior art and will not be repeated here.

Example 1 description:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

Example 2:

The difference between Embodiment 2 and Embodiment 1 is that it further includes a timing circuit breaker module, which is used for the timing circuit breaker device to obtain the circuit breaker timing, and the timing circuit breaker device disconnects the circuit breaker coil according to the circuit breaker timing after learning that the circuit breaker coil conducts current; the The circuit breaker timing is the time from when the circuit breaker coil conducts current to when the circuit breaker coil is turned off.

As shown in FIG. 2 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit-breaking timing; Timing circuit breaking module, the timing circuit breaking device is a time relay KT, the normally closed contact KT-1 of the time relay KT is serially connected to the wire of the circuit breaker coil L, and the timing circuit breaking module is a program module.

The timing circuit breaker module is used for the time relay KT to obtain the circuit breaker timing, and the time relay KT disconnects the circuit breaker coil L according to the circuit breaker timing after learning that the circuit breaker coil L conducts current; Time to open circuit breaker coil L.

Among them, the time relay KT itself and the corresponding electrical connection technology are in the prior art and will not be repeated here.

Description of Example 2:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

Example 3:

The difference between Embodiment 3 and Embodiment 2 is that it also includes a current transformer and a signal collector for acquiring current information in the circuit breaker coil, and a module for acquiring current information. The current transformer is connected to the signal collector and is unidirectional. Communication, obtaining current information module, used for signal collector to obtain current information in circuit breaker coil through current transformer.

As shown in FIG. 3 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit breaking timing, A current transformer and a signal collector for obtaining current information in the circuit breaker coil L, as well as two program modules: a timing circuit breaker module and a current information acquisition module, the timing circuit breaker device is a time relay KT, and the normally closed contact KT of the time relay KT -1 is connected in series with the wire of the circuit breaker coil L, the current transformer is located on one side of the circuit breaker coil L, and the current transformer is connected to the signal collector and communicates in one direction.

The timing circuit breaker module is used for the time relay KT to obtain the circuit breaker timing, and the time relay KT disconnects the circuit breaker coil L according to the circuit breaker timing after learning that the circuit breaker coil L conducts current; Time to open circuit breaker coil L.

The current information acquisition module is used for the signal collector to acquire the current information in the circuit breaker coil L through the current transformer.

Among them, the time relay KT, the current transformer and the signal collector itself and the corresponding communication connection technology are the prior art and will not be repeated here.

Example 3 illustrates:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

The signal collector obtains the current information in the circuit breaker coil L through the current transformer, so that managers can study the corresponding relationship between the current information in the circuit breaker coil L and its coil quality.

Example 4:

The difference between Embodiment 4 and Embodiment 3 is that a wireless communication device is also included, and the signal collector is connected to the wireless communication device and communicates unidirectionally to obtain a current information module, which is also used for the signal collector to send current information through the communication device. .

As shown in FIG. 4 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit breaking timing, A current transformer, a signal collector and a wireless communication device for obtaining current information in the circuit breaker coil L, as well as two program modules, a timing circuit breaker module and an acquisition current information module, the timing circuit breaker device is a time relay KT, and the The normally closed contact KT-1 is connected in series with the wire of the circuit breaker coil L, the current transformer is located on the side of the circuit breaker coil L, the current transformer is connected to the signal collector and communicates in one direction, and the signal collector communicates with wireless The devices are connected and communicate unidirectionally.

The timing circuit breaker module is used for the time relay KT to obtain the circuit breaker timing, and the time relay KT disconnects the circuit breaker coil L according to the circuit breaker timing after learning that the circuit breaker coil L conducts current; Time to open circuit breaker coil L.

The current information acquisition module is used for the signal collector to obtain the current information in the circuit breaker coil L through the current transformer, and the signal collector to send the current information through the wireless communication device.

Among them, the time relay KT, the current transformer, the signal collector, the wireless communication device itself and the corresponding communication connection technology are the prior art and will not be repeated here.

Example 4 illustrates:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

The signal collector obtains the current information in the circuit breaker coil L through the current transformer, and the signal collector sends the current information through the wireless communication device. It is more convenient for managers to obtain the current information in the circuit breaker coil L, so as to study the corresponding relationship between the current information in the circuit breaker coil L and its coil quality.

Example 5:

The difference between Embodiment 5 and Embodiment 4 is that a management terminal is also included, and the signal collector is connected and communicated with the management terminal through a wireless communication device and a dedicated Internet, and the management terminal is a desktop computer.

As shown in FIG. 5 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit breaker timing, A current transformer, a signal collector, a wireless communication device and a management terminal for obtaining current information in the circuit breaker coil L, as well as two program modules, a timing circuit breaker module and a current information acquisition module, the timing circuit breaker device is a time relay KT, and the time The normally closed contact KT-1 of the relay KT is connected in series with the wire of the circuit breaker coil L, the management terminal is a desktop computer, the current transformer is located on the side of the circuit breaker coil L, and the current transformer is connected to the signal collector and is single The signal collector is connected with the wireless communication device and communicates in one direction, and the signal collector is connected and communicated with the management terminal through the wireless communication device and the dedicated Internet.

The timing circuit breaker module is used for the time relay KT to obtain the circuit breaker timing, and the time relay KT disconnects the circuit breaker coil L according to the circuit breaker timing after learning that the circuit breaker coil L conducts current; Time to open circuit breaker coil L.

The current information acquisition module is used for the signal collector to obtain the current information in the circuit breaker coil L through the current transformer, and the signal collector sends the current information to the desktop computer through the wireless communication device.

Among them, the time relay KT, the current transformer, the signal collector, the wireless communication device, the desktop computer itself and the corresponding communication connection technology are the prior art and will not be repeated here.

Example 5 illustrates:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

The signal collector obtains the current information in the circuit breaker coil L through the current transformer, and the signal collector sends the current information to the desktop computer through the wireless communication device. The administrator can more conveniently obtain and manage the current information in the circuit breaker coil L through the management terminal, so as to study the corresponding relationship between the current information in the circuit breaker coil L and its coil quality.

Example 6:

Embodiment 6 is different from Embodiment 5 in that it further includes a power supply device, an interface converter, a POE interface, an all-in-one machine, and a display module, and the timing disconnection device is connected to the power supply device through the first port of the interface converter, and the The current transformer is connected to the power supply device through the second port of the interface converter, the power supply device is connected to the signal collector through the POE interface, the signal collector is connected to the all-in-one machine and communicates unidirectionally, and the display module is used for the all-in-one machine Get current information and display it.

As shown in FIG. 6 , the present invention discloses a device for protecting the circuit breaker coil, including a timing circuit breaker device that is connected in series with the circuit breaker coil L and used to know that the circuit breaker coil L conducts current and disconnect the circuit breaker coil L according to the circuit breaking timing, The current transformer, the signal collector, the wireless communication device, the management terminal, the interface converter and the all-in-one machine used to obtain the current information in the circuit breaker coil L, as well as the timing circuit breaker module, the current information acquisition module and the display module, consist of three program modules. The timing circuit breaker is a time relay KT, the management terminal is a desktop computer, the normally closed contact KT-1 of the time relay KT is connected in series with the wire of the circuit breaker coil L, and the time relay KT passes through the first interface converter. The port is connected to the built-in power supply device of the interface converter, the current transformer is located on the side of the circuit breaker coil L, and the current transformer is connected to the built-in power supply device of the interface converter through the second port of the interface converter, the interface converter It is connected to the signal collector through its POE interface, that is, the current transformer is connected to the signal collector through the interface converter and communicates unidirectionally. The signal collector is connected to the wireless communication device and communicates unidirectionally. It is connected and communicated with the dedicated Internet and the management terminal, and the signal collector is wired and communicated with the all-in-one machine.

The timing circuit breaker module is used for the time relay KT to obtain the circuit breaker timing, and the time relay KT disconnects the circuit breaker coil L according to the circuit breaker timing after learning that the circuit breaker coil L conducts current; Time to open circuit breaker coil L.

The current information acquisition module is used for the signal collector to obtain the current information in the circuit breaker coil L through the current transformer. The signal collector sends the current information to the desktop computer through the wireless communication device, and the signal collector sends the current information to the all-in-one computer.

The display module is used for the all-in-one machine to obtain and display current information.

Among them, the time relay KT, the current transformer, the interface converter, the signal collector, the all-in-one computer, the wireless communication device, the desktop computer itself and the corresponding communication connection technology are the prior art and will not be repeated here.

Example 6 illustrates:

Connect the normally closed contact KT-1 of the time relay KT into the wire of the circuit breaker coil L. At this time, the normally closed contact KT-1 is in the conducting state, and the circuit breaker coil L is in the conducting state but no current. Set the time relay KT manually. The open circuit timing is 5 seconds.

When the relay protection device controls the action of the circuit breaker through the control circuit, there is current in the circuit breaker coil L and flows through the normally closed contact KT-1 of the time relay KT, and the time relay KT learns that the circuit breaker coil L conducts current, and delays 5 Seconds later, the time relay KT opens its normally closed contact KT-1, and the circuit breaker coil L is in an off state without current, thus effectively preventing the circuit breaker coil L from being burned out and solving the technology that the circuit breaker coil is easily burned out. question.

The signal collector obtains the current information in the circuit breaker coil L through the current transformer, and the signal collector sends the current information to the desktop computer through the wireless communication device. The administrator can more conveniently obtain and manage the current information in the circuit breaker coil L through the management terminal, so as to study the corresponding relationship between the current information in the circuit breaker coil L and its coil quality.

The signal collector sends the current information to the all-in-one computer, and the all-in-one computer obtains and displays the current information, which is convenient for on-site maintenance personnel to view the current information in the circuit breaker coil L, and is more convenient to use.

Example 7:

As shown in FIG. 7 , the present invention discloses a method for protecting a circuit breaker coil. Based on the device of Embodiment 6, the method includes the following steps:

S1 timing disconnection

The operation and maintenance personnel manually set the disconnection timing of the time relay KT to 5 seconds. After the time relay KT learns that the circuit breaker coil conducts current, the circuit breaker coil is disconnected according to the disconnection timing.

S2 gets current information

The signal collector obtains the current information in the circuit breaker coil L through the current transformer, the signal collector sends the current information to the desktop computer through the wireless communication device, and the signal collector sends the current information to the all-in-one computer.

S3 display

The desktop computer receives and displays the current information, and the all-in-one computer receives and displays the current information.

Compared with Embodiment 7, in the step of acquiring the current information in S2, the signal collector may also acquire the current information in the circuit breaker coil L through the current transformer and the power supply device.

The inventive concept of this application:

It is connected to the circuit breaker coil in series and used to know the circuit breaker coil conducting current and then disconnect the circuit breaker coil according to the circuit breaker timing. The circuit breaker coil is disconnected regularly to protect the circuit breaker coil and is not easy to burn out.

Purpose of this application:

It is very important to explore new methods or devices to effectively detect and reduce the number of circuit breaker coil burnouts.

Features of this application:

It includes a time relay, an interface converter, a current transformer, a signal collector, a wireless transmission device, an all-in-one screen display device, and a device host for the management terminal. The time relay is connected with the interface converter, the interface converter is connected with the current transformer, the current transformer is connected with the signal acquisition card, the signal acquisition card is connected with the wireless transmission device and the screen display device, and the wireless transmission device communicates with the device host.

The time relay has two pairs of normally open nodes and two pairs of normally closed nodes. One pair of normally closed nodes is connected in series with the circuit breaker coil, and the rest are used as backup. At the same time, the time relay has the function of signal output.

The interface converter, the input interface adopts four-pin aviation plug, the output interface adopts POE interface, the transmission rate can reach up to 2Gbps, and the built-in power supply device can provide DC +12V, -12V, +5V, -5V voltage and 5mA constant voltage. stream source.

The current transformer can detect the current in the main circuit of the circuit breaker coil, and can output the current signal to the interface converter at the same time.

The signal collector has eight synchronous sampling analog input channels, the AD conversion resolution is 24 bits, the sampling frequency is 100S/s-204.8kS/s, the minimum sampling resolution can reach 181.9uS/s, and the dynamic range is 114dB. , the input interface adopts POE interface, and the output interface adopts USB interface.

The wireless transmission device has a working frequency of 2400-2480MHz, a serial port rate of more than 4800bps, and a maximum transmission distance of 1600m.

The screen display device is a liquid crystal touch screen with a resolution of 800×480 and above, the touch mode is resistive touch, the sensing force is 75g, and the response time is 5ms.

The working principle of the present invention:

As shown in Figure 6, the staff directly connects the circuit breaker coil protection device in series to the lower part of the circuit breaker coil in the circuit breaker control circuit, and the device already has a circuit inside. When the circuit breaker coil is energized, the time relay starts timing, and the current transformer collects the current of the main circuit of the circuit breaker coil; the time relay is connected to the current transformer through the interface converter, and the signal collector will collect the time information After processing with the current information, it is displayed on the screen display device, and the signal is transmitted to the staff computer through the wireless transmission device.

When the time relay reaches the set time, the normally closed node connected in series with the main circuit of the circuit breaker coil in the device is disconnected, so that the circuit breaker coil loses power and protects the coil. At the same time, the signal collector collects the power failure information.

Technical solution description:

As shown in Figure 6, the circuit breaker coil protection device includes: a time relay, an interface converter, a current transformer, a power supply device, a POE interface, a signal collector, a USB interface, a wireless transmission device, a display, and a device host. The connection method is as follows: the time relay and the current transformer are connected to the interface converter through the four-core plug, the interface converter is connected to the signal collector through the POE interface, the signal collector is connected to the wireless transmission device through the USB interface, and the wireless transmission device receives the wireless The module is connected to the staff computer.

The time relay model is 3RP-11015, which has two pairs of normally open nodes and two pairs of normally closed nodes. One pair of normally closed nodes is connected in series with the circuit breaker coil, and the rest are used as backup. At the same time the time relay has a signal output to the interface converter.

The interface converter model is GX16-669, the input interface adopts four-pin aviation plug, the output interface adopts POE interface, the transmission rate can reach 2Gbps, and the built-in power supply device can provide DC +12V, -12V, +5V, - 5V voltage and 5mA constant current source. The function of the interface converter is to convert the output interface of the time relay from a four-core plug to the POE interface of the signal collector, and the built-in power supply device can provide it with the required working power.

The model of the current transformer is CT10P1, which can detect the current in the main circuit of the circuit breaker coil, and can output the current signal to the interface converter at the same time.

The signal collector model is NI-PXle4496, with eight synchronous sampling analog input channels, the AD conversion resolution is 24 bits, the sampling frequency is 100S/s-204.8kS/s, and the minimum sampling resolution can reach 181.9uS/s , the dynamic range is 114dB, the input interface adopts POE interface, and the output interface adopts USB interface. The function of the signal collector is to perform analog-to-digital conversion of time and current signals, so as to transmit them to the wireless transmission device more efficiently and quickly.

The wireless transmission device model is YX12500, the operating frequency is 2400-2480MHz, the serial port rate is above 4800bps, and the transmission distance is up to 1600m. The function of the wireless transmission device is to transmit the signal to the staff host by wireless.

After the application has been run confidentially for a period of time, the benefits of feedback from on-site technicians are:

It realizes the protection of the circuit breaker coil by connecting the circuit breaker coil in series and using it to know that the circuit breaker coil conducts current and then disconnects the circuit breaker coil according to the circuit breaker timing.

It realizes the protection of the circuit breaker coil through the steps of timing disconnection and the like, and is not easy to burn out.

Claims (10)

1. A device for protecting a circuit breaker coil, characterized in that it comprises a timed circuit breaking device that is connected in series with the circuit breaker coil and used to disconnect the circuit breaker coil according to the circuit breaking timing after learning that the circuit breaker coil conducts current. 2. A device for protecting a circuit breaker coil according to claim 1, characterized in that: it further comprises a timing circuit breaker module, which is used for the timing circuit breaker to obtain the circuit breaking timing, and the timing circuit breaker, after learning that the circuit breaker coil conducts current, according to The circuit breaker coil is disconnected at the circuit breaker timing; the circuit breaker timing is the time from when the circuit breaker coil conducts current to when the circuit breaker coil is disconnected. 3 . The device for protecting a circuit breaker coil according to claim 1 , wherein the timing circuit breaker is a time relay. 4 . 4. A device for protecting a circuit breaker coil according to claim 1, further comprising a current transformer and a signal collector for acquiring current information in the circuit breaker coil, and a current information acquisition module, the current The transformer is connected with the signal collector and communicates unidirectionally to obtain a current information module, which is used by the signal collector to obtain current information in the circuit breaker coil through the current transformer. 5 . The device for protecting a circuit breaker coil according to claim 4 , further comprising a communication device, wherein the signal collector is connected to the communication device and communicates unidirectionally to obtain a current information module, and is also used for signal The collector sends current information through the communication device. 6 . The device for protecting a circuit breaker coil according to claim 5 , wherein the communication device is a wireless communication device. 7 . 7 . The device for protecting a circuit breaker coil according to claim 4 , further comprising an integrated machine and a display module, the signal collector is connected to the integrated machine and communicates in one direction, and the display module is used for the integrated machine. 8 . The machine obtains the current information and displays it. 8. A device for protecting a circuit breaker coil according to claim 4, characterized in that it further comprises a power supply device, an interface converter and a POE interface, and the timing circuit breaker device is connected to the power supply through the first port of the interface converter The current transformer is connected to the power supply device through the second port of the interface converter, and the power supply device is connected to the signal collector through the POE interface. 9. A method for protecting a circuit breaker coil, comprising the following steps: a step of timing circuit breaker, presetting a circuit breaker timing, and disconnecting the circuit breaker coil according to the circuit breaker timing after the timing circuit breaking device learns that the circuit breaker coil conducts current. 10. A method for protecting a circuit breaker coil according to claim 9, further comprising the following steps: a step of acquiring current information, acquiring and sending current information in the circuit breaker coil; and a step of displaying, receiving current information and display.

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