CN204179649U - A kind of earth potential counterattack restraining device - Google Patents

A kind of earth potential counterattack restraining device Download PDF

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Publication number
CN204179649U
CN204179649U CN201420417724.1U CN201420417724U CN204179649U CN 204179649 U CN204179649 U CN 204179649U CN 201420417724 U CN201420417724 U CN 201420417724U CN 204179649 U CN204179649 U CN 204179649U
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CN
China
Prior art keywords
equipment
ground strap
port
restraining
earthing port
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Active
Application number
CN201420417724.1U
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Chinese (zh)
Inventor
杨海涛
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SICHUAN SHICHENG ELECTRONIC INFORMATION SYSTEM Co Ltd
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SICHUAN SHICHENG ELECTRONIC INFORMATION SYSTEM Co Ltd
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Priority to CN201420417724.1U priority Critical patent/CN204179649U/en
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Abstract

The utility model discloses a kind of earth potential counterattack restraining device, comprise protective earthing port, working earthing port and ground strap; All be connected with bad ripple between protective earthing port and ground strap, between working earthing port and ground strap and suppress assembly; Bad ripple suppresses assembly to comprise bad ripple band stop filter in parallel, EMC band pass filter and low frequency bandpass filter.The utility model can prevent thunderbolt back overrating voltage, overcurrent enters system equipment, reduces electromagnetic interference, reduces the infringement to equipment.

Description

A kind of earth potential counterattack restraining device
Technical field
The utility model relates to Lightning Prevention Technique field, is specifically related to a kind of earth potential counterattack restraining device.
Background technology
The outside lightning-protection system (as lightning rod, lightning conduction etc.) of building suffers direct stroke, then produce dangerous overvoltage at the two ends of earth resistance, this overvoltage is connect naturally by the outside lightning-protection system of the earth connection of equipment, building or other neighbouring buildings or other dodges thing (various pipeline, cable shield tube etc.) and introduces equipment, causes the phenomenon of the damage of equipment.
Building is when suffering direct stroke, lightning current will enter ground along downlead each in building lightning protection system and earth electrode, in the process, lightning current will produce transient state high voltage in lightning-protection system, if downlead and the apparatus insulated distance of ambient network are inadequate, and the power-supply system PE line ground connection of equipment and signal system logic ground and lightning protection system are not altogether, then will there is very high voltage between, and can discharge breakdown be there is, cause equipment badly damaged, even personal safety.Thisly deal with earthy counterattack improperly due to grounding technology, cause whole network system equipment all to smash.
Earth potential transient state high potential not only endangers the equipment in this building, goes back entail dangers to the equipment in adjacent buildings.Although the equipment in this adjacent buildings does not suffer direct stroke, but after nearby building is struck by lightning, transient state high potential is strikeed back in the equipment ground system reached along underground piping in adjacent buildings circuit, makes the equipment be connected with these circuits be subject to the infringement of transient state high potential.Earth potential counterattack can generate the counterattack voltage of a few kV to tens kV to hundreds of kV; this counterattack can along the zero line of electric power system; protective earthing line and various forms of earth connection, import indoor into the form of ripple or propagate into larger indoor range, causing large-area harm.
General earth potential counterattack suppresses to adopt in the safety ground of system and accesses the radio-frequency suppressor that is suppressed thunderbolt voltage between working earthing and earth mat, or in grounding system, seal in anti-counterattack diode, utilize the one-way conduction feature of diode to stop thunderbolt counterattack voltage access arrangement.Simple radio-frequency suppressor is that the quite high coil of impedance is formed in fact, impact is there is in its electromagnetic compatibility for system on reference point (ground connection), anti-counterattack diode is except the Commpensation And Adaptation under thunderbolt counterattack, the counterattack voltage of thunderbolt is also had also to there is polarity problems, also be simultaneously a kind of impact for system electromagnetic compatibility, cause system equipment to be affected.Therefore, we need to find the more reliable more reasonably counterattack voltage suppression technology of one.
In order to solve above-mentioned deficiency of the prior art, the utility model proposes a kind of new solution.
Utility model content
The purpose of this utility model is to provide a kind of earth potential counterattack restraining device.
For reaching above-mentioned purpose, the technical scheme that the utility model adopts is: provide a kind of earth potential to strike back restraining device, comprise protective earthing port, working earthing port and ground strap; All be connected with bad ripple between protective earthing port and ground strap, between working earthing port and ground strap and suppress assembly; Bad ripple suppresses assembly to comprise bad ripple band stop filter in parallel, EMC band pass filter and low frequency bandpass filter.
In sum, the utility model has the following advantages:.
1, ground strap of the present utility model connects with the grounding ports of lightning protection earth mat or lightning-protected product, when lightning surge produces, after Surge Protector work, lightning surge will be released by ground strap with accessing, and ensure that system equipment does not damage by thunder and lightning;
2, protective earthing port can connect with the protective grounding of equipment.When insulation damages appears in system equipment, on device housings band during dangerous voltage, the dangerous voltage of equipment successively by connecting with the earth after protective earthing port and bad ripple suppression assembly, will be formed equipotential state, ensuring personal safety;
3, working earthing port can connect with the working earthing port of equipment, and equipment can be undertaken unifying ground connection reference connection by working earthing port, ensures good Electro Magnetic Compatibility.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of earth potential counterattack restraining device, comprises protective earthing port, working earthing port and ground strap.Earth terminal or the shell of protective earthing port and equipment are connected, and working earthing port is connected with the working earthing end of equipment, and ground strap is connected with Surge Protector lightning protection line, and ground strap is also connected with lightning protection grounding network simultaneously.
All be connected with bad ripple between protective earthing port and ground strap, between working earthing port and ground strap and suppress assembly.Bad ripple suppresses assembly to comprise bad ripple band stop filter in parallel, EMC band pass filter and low frequency bandpass filter.The electromagnetic interference signal of the dangerous voltage that device housings and equipment working earthing end may occur and existence suppresses to pass into ground strap after assembly process through bad ripple, then enter lightning protection grounding network, ensure the safety of personal equipment and reduce the impact on equipment that brings of electromagnetic interference.The thunderbolt overcurrent come by Surge Protector lightning protection tape carries out earial drainage protection by directly flowing into lightning protection grounding network through ground strap.
Although describe in detail embodiment of the present utility model by reference to the accompanying drawings, should not be construed as the restriction of the protection range to this patent.In the scope described by claims, the various amendment that those skilled in the art can make without creative work and distortion still belong to the protection range of this patent.

Claims (1)

1. an earth potential counterattack restraining device, is characterized in that: comprise protective earthing port, working earthing port and ground strap; All be connected with bad ripple between described protective earthing port and ground strap, between working earthing port and ground strap and suppress assembly; Described bad ripple suppresses assembly to comprise bad ripple band stop filter in parallel, EMC band pass filter and low frequency bandpass filter.
CN201420417724.1U 2014-07-28 2014-07-28 A kind of earth potential counterattack restraining device Active CN204179649U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420417724.1U CN204179649U (en) 2014-07-28 2014-07-28 A kind of earth potential counterattack restraining device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420417724.1U CN204179649U (en) 2014-07-28 2014-07-28 A kind of earth potential counterattack restraining device

Publications (1)

Publication Number Publication Date
CN204179649U true CN204179649U (en) 2015-02-25

Family

ID=52568424

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420417724.1U Active CN204179649U (en) 2014-07-28 2014-07-28 A kind of earth potential counterattack restraining device

Country Status (1)

Country Link
CN (1) CN204179649U (en)

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