CN216929583U

CN216929583U - RS485 communication intelligent lightning protection device

Info

Publication number: CN216929583U
Application number: CN202220039857.4U
Authority: CN
Inventors: 陈民胜; 唐上权; 羊念姑
Original assignee: Zhuhai Telehof Electrics Co ltd
Current assignee: Zhuhai Telehof Electrics Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-07-08
Anticipated expiration: 2032-01-06

Abstract

The utility model provides an RS485 communication intelligent lightning protection device, which comprises a shell and a base, wherein at least two discharge element modules and an RS485 processing circuit are arranged in the shell, each discharge element module comprises a discharge element with a thermal trip indicating function and capable of absorbing lightning pulse, an extraction electrode of each discharge element module is connected with a wiring board of the base, an external wiring terminal is arranged on each wiring board and is connected with a live wire or a zero wire or a ground wire to form a lightning protection loop, a microswitch is arranged in the middle of the base, a thermal trip indicating piece of each discharge element module is connected with the microswitch, and when the thermal trip indicating piece acts, the normally closed or normally open state of the microswitch is fed back to the RS485 processing circuit. The utility model provides an RS485 communication intelligent lightning protection device with an RS485 function serial port communication for inhibiting induced lightning pulse, which realizes the integral lightning protection and overvoltage protection of an RS485 interface and has the advantages of good sealing property, high reliability, convenient installation, small volume, light weight and the like.

Description

RS485 communication intelligent lightning protection device

Technical Field

The utility model relates to the technical field of power supply system lightning protection, in particular to an RS485 communication intelligent lightning protection device in a power supply distribution system of an LPZ 0A lightning protection partition, which needs to carry out remote intelligent communication on a surge protector, carry out remote detection on a lightning protection device and reflect the remote detection on a monitoring terminal.

Background

Lightning strikes, including direct, near and distant strikes, produce pulse currents and pulse voltages of magnitudes and energies that are particularly dangerous for the system being protected. When direct lightning or adjacent lightning strike occurs, a high potential is generated at the place due to the existence of the ground resistance, so that the place and the far end have higher potential difference, the potential difference is a huge threat to the electrical equipment of the building, and besides the potential difference generated by the ground resistance, the electromagnetic induction of the lightning can also cause overvoltage of a connecting system and the equipment. With the stricter requirements of relevant equipment on lightning Protection, especially the influence of direct lightning on a power supply system, installing a power Surge Protector (SPD) to suppress Surge and instantaneous overvoltage on a line and overcurrent on a discharge line becomes one of the important links of modern lightning Protection technology.

With the increasing strictness of relevant equipment on lightning Protection requirements, particularly the influence of direct lightning on a power supply system, a power Surge Protection Device (SPD) capable of carrying out remote communication (RS485 communication) is installed to suppress Surge and instantaneous overvoltage on a circuit and over-current on a discharge circuit, realize remote transmission monitoring and timely discover whether the SPD fails or not, and achieve the effect of reasonable real-time replacement, so that the Surge Protection Device becomes an important component part of modern lightning Protection technology.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an RS485 communication intelligent lightning protection device with an RS485 function serial port communication for inhibiting induction lightning pulse, realizes the integral lightning protection and overvoltage protection of an RS485 interface type lightning protection system, and has the advantages of good sealing performance, high reliability, convenience in installation, small size, light weight and the like.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a RS485 communication intelligence lightning protection device, it includes: the lightning protection device comprises a shell and a base, wherein at least two discharging element modules for discharging lightning pulses and an RS485 processing circuit are arranged in the shell, the base is used for connecting the discharging element modules and the RS485 processing circuit, and the discharging element modules comprise discharging elements with thermal tripping indication functions and lightning pulse absorption functions; the leading-out electrode of the discharge element module is connected with a wiring board of the base, an external wiring terminal is arranged on the wiring board and is connected with a live wire or a zero wire or a ground wire to form a lightning protection loop, wherein the first end of the first discharge element module is connected with the ground wire, the first end of the second discharge element module is connected with the live wire, the second end of the first discharge element module and the second end of the second discharge element module are connected with the zero wire, the third end of the first discharge element module is connected with the third end of the second discharge element module, and the fourth end of the second discharge element module is connected with the RS485 processing circuit; the middle part of the base is provided with a microswitch, a thermal tripping indicating piece of the discharging element module is connected with the microswitch, and when the thermal tripping indicating piece acts, the normally closed or normally open state of the microswitch is fed back to the RS485 processing circuit.

Further, the discharge element comprises at least one varistor or ceramic gas discharge tube.

The RS485 processing circuit comprises a first communication interface, a second communication interface, an RS485 communication circuit and a control chip, wherein the RS485 communication circuit is connected with the discharging element module through the first communication interface, the RS485 communication circuit is connected with the control chip, and the control chip is communicated with an upper computer through the second communication interface.

A TVS diode group is connected between the first communication interface and the RS485 communication circuit and is connected with the RS485 processing circuit through a resistor.

The RS485 processing circuit further comprises a switch S1 and a switch S2, wherein one end of the switch S1 and one end of the switch S2 are connected and then grounded, and the other ends of the switch S1 and the switch S2 are connected to the 10 th pin of the control chip.

According to a further scheme, the device further comprises a power supply circuit, wherein the power supply circuit is connected with the RS485 processing circuit, and the power supply circuit consists of a power supply interface and a plurality of filter capacitors.

Therefore, by adopting the technical scheme, the power surge protector with the RS485 serial port connection is arranged in each power distribution unit of the power supply system, so that the failure detection of a more systematic lightning protection product is realized, the loss caused by lightning stroke can be timely and effectively controlled, and the power surge protector is adaptive to most operating systems and has high compatibility.

Therefore, the RS485 communication function of the utility model is suitable for all power supply surge protectors with dry contact remote signaling functions, has high compatibility, and can directly use an independent RS485 module to be matched with the existing surge protector with remote signaling. The product is widely applied to lightning protection of various power systems, the RS485 module is provided with an independent module, a module integrated in a base space and a connecting module with lightning counting, and almost all lightning protection systems can be compatible and covered. In addition, the protection monitor is intelligentized and miniaturized by adopting the singlechip for control, and the energy consumption is lower.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an upper computer in an embodiment of an RS485 communication intelligent lightning protection device of the utility model.

Fig. 2 is an assembly schematic diagram of an embodiment of an RS485 communication intelligent lightning protection device of the utility model.

Fig. 3 is a schematic diagram of an embodiment of an RS485 communication intelligent lightning protection device according to the utility model.

Fig. 4 is a schematic circuit diagram of an embodiment of an RS485 communication intelligent lightning protection device according to the utility model.

The reference numbers indicate: RS485 communication intelligent lightning protection device 10, first discharge element module 11, second discharge element module 12, RS485 processing circuit 13, host computer 20

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without inventive step, are within the scope of protection of the utility model.

Referring to fig. 1 to 4, an RS485 communication intelligent lightning protection device 10 includes a housing and a base, at least two discharging element modules for discharging lightning pulses and an RS485 processing circuit 13 are disposed inside the housing, and the base is used for connecting the discharging element modules and the RS485 processing circuit 13, wherein the discharging element modules include a discharging element having a thermal trip indicating function and absorbing the lightning pulses.

In this embodiment, the leading-out electrode of the discharge element module is connected to the terminal board of the base, an external connection terminal is disposed on the terminal board, and is connected to the live line L, the neutral line N, or the ground line PE to form a lightning protection loop, wherein a first end of the first discharge element module 11 is connected to the ground line PE, a first end of the second discharge element module 12 is connected to the live line L, a second end of the first discharge element module 11 and a second end of the second discharge element module 12 are connected to the neutral line N, a third end of the first discharge element module 11 is connected to a third end of the second discharge element module 12, and a fourth end of the second discharge element module 12 is connected to the RS485 processing circuit 13.

The middle of the base is provided with a microswitch S3, a thermal trip indicating piece of the discharging element module is connected with the microswitch S3, and when the thermal trip indicating piece acts, the normally closed or normally open state of the microswitch S3 is fed back to the RS485 processing circuit 13.

In this embodiment, the discharge element comprises at least one varistor or ceramic gas discharge tube.

As shown in fig. 4, the RS485 processing circuit 13 includes a communication interface J3, a communication interface J1, an RS485 communication circuit U2, and a control chip U1, the RS485 communication circuit U2 is connected to the discharge element module through the communication interface J3, the RS485 communication circuit U2 is connected to the control chip U1, and the control chip U1 communicates with the upper computer 20 through the communication interface J1.

In this embodiment, a TVS diode group is further connected between the communication interface J3 and the RS485 communication circuit U2, and the TVS diode group is connected to the RS485 processing circuit 13 through a resistor. The TVS diode group comprises a diode TVS1, a diode TVS2 and a diode TVS3, and the resistor comprises a resistor R1, a resistor R2, a resistor R3 and a resistor R4.

In this embodiment, the RS485 processing circuit 13 further includes a switch S1 and a switch S2, one end of the switch S1 and one end of the switch S2 are connected to ground, and the other end of the switch S1 and the other end of the switch S2 are connected to the 10 th pin of the control chip U1.

In this embodiment, the apparatus further includes a power circuit, which is connected to the RS485 processing circuit 13, wherein the power circuit is composed of a power interface J2 and a plurality of filter capacitors (e.g., filter capacitors C4, C5).

Specifically, the lightning protection device provided by the utility model comprises a discharge element module for discharging lightning pulses, an RS485 processing circuit 13 for RS485 communication, and a base for connecting the discharge element module and the RS485 processing circuit 13.

The discharging element module comprises a thermal trip indicating function and a piezoresistor or a discharge tube for absorbing lightning pulse, two electrodes connected with the base of the discharging element module are inserted on a wiring board of the base, and an external wiring terminal is arranged on the wiring board and connected with an external live wire L or a zero wire N or a ground wire PE to form a lightning protection loop. The thermal trip indicator of the discharge element module is connected with the microswitch S3 in the middle of the base to complete a normally closed or normally open state of the microswitch S3. The contact with the microswitch S3 is converted to another state when the thermal trip indicator of the discharge element module is actuated, so that the state transition is fed back to the RS485 processing circuit 13 through normally open or normally closed.

Further, the RS485 processing circuit 13 comprises a power supply part, an information processing part and a signal transmission part, wherein the power supply part is changed into 5V direct current required by RS485 through 220V power supply input of the protector, the signal processing part is used for acquiring and processing normally open or normally closed signals of the modular discharge element, and the signal transmission part is used for realizing butt joint with a computer terminal and finally realizing RS485 intelligent communication.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a RS485 communication intelligence lightning protection device which characterized in that includes:

the lightning protection device comprises a shell and a base, wherein at least two discharging element modules for discharging lightning pulses and an RS485 processing circuit are arranged in the shell, the base is used for connecting the discharging element modules and the RS485 processing circuit, and the discharging element modules comprise discharging elements with thermal tripping indication functions and lightning pulse absorption functions;

the leading-out electrode of the discharge element module is connected with a wiring board of the base, an external wiring terminal is arranged on the wiring board and is connected with a live wire or a zero wire or a ground wire to form a lightning protection loop, wherein the first end of the first discharge element module is connected with the ground wire, the first end of the second discharge element module is connected with the live wire, the second end of the first discharge element module and the second end of the second discharge element module are connected with the zero wire, the third end of the first discharge element module is connected with the third end of the second discharge element module, and the fourth end of the second discharge element module is connected with the RS485 processing circuit;

The middle part of the base is provided with a microswitch, a thermal tripping indicator of the discharging element module is connected with the microswitch, and when the thermal tripping indicator acts, the normally closed or normally open state of the microswitch is fed back to the RS485 processing circuit.

2. The RS485 communication intelligent lightning protection device according to claim 1, wherein:

the discharge element comprises at least one varistor or ceramic gas discharge tube.

3. The RS485 communication intelligent lightning protection device according to claim 1, wherein:

the RS485 processing circuit comprises a first communication interface, a second communication interface, an RS485 communication circuit and a control chip, the RS485 communication circuit is connected with the discharging element module through the first communication interface, the RS485 communication circuit is connected with the control chip, and the control chip is communicated with an upper computer through the second communication interface.

4. The RS485 communication intelligent lightning protection device according to claim 3, wherein:

a TVS diode group is further connected between the first communication interface and the RS485 communication circuit, and the TVS diode group is connected with the RS485 processing circuit through a resistor.

5. The RS485 communication intelligent lightning protection device according to claim 4, wherein:

the RS485 processing circuit further comprises a switch S1 and a switch S2, one ends of the switch S1 and the switch S2 are connected and then grounded, and the other ends of the switch S1 and the switch S2 are connected to a 10 th pin of the control chip.

6. The RS485 communication intelligent lightning protection device according to any one of claims 1 to 5, wherein:

the device also comprises a power supply circuit, wherein the power supply circuit is connected with the RS485 processing circuit, and the power supply circuit consists of a power supply interface and a plurality of filter capacitors.