CN114844018A - Lightning protection switching system for shielding machine room - Google Patents
Lightning protection switching system for shielding machine room Download PDFInfo
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- CN114844018A CN114844018A CN202210611068.8A CN202210611068A CN114844018A CN 114844018 A CN114844018 A CN 114844018A CN 202210611068 A CN202210611068 A CN 202210611068A CN 114844018 A CN114844018 A CN 114844018A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0138—Electrical filters or coupling circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
Abstract
The invention relates to a lightning protection switching system for a shielding machine room, which comprises: the lightning protection switching module is arranged in the lightning protection switching box of the shielding machine room, the lightning protection switching module can be used for carrying out lightning protection treatment on a power circuit and a signal circuit in the machine room by discharging current exceeding a preset voltage threshold value, and the power circuit and the signal circuit in the machine room are further subjected to filtering treatment by differential mode filtering and common mode filtering, so that the problems that the power circuit and the signal circuit in the machine room are exposed to lightning in the natural environment, or the voltage on the power cable or the signal cable fluctuates and fluctuates due to the switching of overvoltage and high-power inductive load in the power system, the equipment is burnt, the communication is stopped and the like are caused are solved.
Description
Technical Field
The invention relates to the technical field of machine room line protection, in particular to a lightning protection switching system for a shielding machine room.
Background
Modern electronic equipment has the characteristics of high power density, high sensitivity, low power consumption and the like, the equipment facilities are very sensitive to voltage fluctuation in a circuit, the fluctuation and fluctuation of voltage on cables can be caused by thunder and lightning in natural environment, overvoltage in an electric power system and switching of high-power inductive loads, even equipment burning loss and communication stop and other disasters can be caused in serious conditions, power supply cables and signal cables of a shielding machine room cannot directly enter the machine room or directly exit the machine room, switching needs to be carried out through a switching box when the cables enter and exit the machine room, the shielding efficiency of the machine room can be seriously damaged when the cables directly enter or exit the machine room, precision equipment in the shielding machine room needs to be protected against the voltage fluctuation, and lightning stroke and surge resistance are needed.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a lightning protection switching system for a shielding computer room, so as to solve the problems in the prior art that a switching box of the shielding computer room does not have the functions of lightning protection and filtering for a power line and a signal line, so that the power line and the signal line entering and exiting the shielding computer room are prone to cause fluctuation and fluctuation of voltage on a cable due to lightning in a natural environment or overvoltage in a power system and switching of a high-power inductive load, thereby causing equipment burning loss, communication stop, and the like.
The lightning protection switching system for the shielding machine room comprises:
lightning protection switching module: the lightning protection device is used for performing lightning protection treatment on a power supply circuit and a signal circuit in the machine room by discharging current exceeding a preset voltage threshold;
the lightning protection switching module is also used for filtering a power supply circuit and a signal circuit in the machine room through differential mode filtering and common mode filtering;
the lightning protection switching module comprises a power supply lightning protection switching module and a signal lightning protection switching module;
the power supply lightning protection switching module is used for performing lightning protection filtering processing on a power supply circuit in the machine room, and the signal lightning protection switching module is used for performing lightning protection filtering processing on a signal circuit in the machine room;
the lightning protection switching module is arranged in a lightning protection switching box of the machine room.
In a further aspect of the present invention,
the power supply lightning protection switching module comprises a power supply lightning protection unit and a power supply filtering unit;
the signal lightning protection switching module comprises a signal lightning protection unit and a signal filtering unit;
the power supply lightning protection unit comprises a power supply primary lightning protection unit and a power supply secondary lightning protection unit;
the signal lightning protection unit comprises a signal primary lightning protection unit and a signal secondary lightning protection unit.
Further, in the above-mentioned case,
the primary lightning protection unit of the power supply comprises: a piezoresistor R1, a piezoresistor R2 and a piezoresistor R3;
one end of the piezoresistor R1 is connected with an input line IN1, and the other end of the piezoresistor R1 is connected with an input IN 2;
one end of the piezoresistor R2 is connected with an input line IN2, and the other end of the piezoresistor R2 is grounded;
one end of the piezoresistor R3 is connected with an input line IN1, and the other end of the piezoresistor R3 is grounded;
the primary lightning protection unit of the power supply is used for discharging current exceeding a certain voltage threshold value on a power supply line.
Further, in the above-mentioned case,
the secondary lightning protection unit of power and the secondary lightning protection unit of signal all includes: a transient diode TVS1, a transient diode TVS2, and a transient diode TVS 3;
one end of the transient diode TVS1 is connected with an input line IN1, and the other end of the transient diode TVS2 is connected with an input line IN 2;
one end of the transient diode TVS2 is connected with an input line IN2, and the other end of the transient diode TVS2 is grounded;
one end of the transient diode TVS3 is connected to the input line IN1 and the input line IN2, and the other end of the transient diode TVS3 is grounded.
Further, in the above-mentioned case,
the primary signal lightning protection unit comprises: a three-pole gas discharge tube GDT 1;
one electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN1, the other electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN2, and the ground electrode of the three-pole gas discharge tube GDT1 is grounded;
the three-pole gas discharge tube GDT1 is used to bleed current on the signal line above a certain voltage threshold.
Further, in the above-mentioned case,
IN the signal lightning protection unit, a self-recovery fuse PPTC1 is arranged on the input line IN1, a self-recovery fuse PPTC2 is arranged on the input line IN2, and the self-recovery fuse PPTC1 and the self-recovery fuse PPTC2 are used for decoupling and short-circuit protection.
Further, in the above-mentioned case,
IN the signal lightning protection unit, a resistor R1 is further arranged on the input line IN1, a resistor R2 is arranged on the input line IN2, the self-recovery fuse PPTC1 is connected IN series with the resistor R1, and the self-recovery fuse PPTC2 is connected IN series with the resistor R2;
IN the signal lightning protection unit, one end of the transient diode TVS1 connected with an input line IN1 is positioned between a self-recovery fuse PPTC1 and a resistor R1; one end of the transient diode TVS2 connected to the input line IN2 is located between the self-recovery fuse PPTC2 and the resistor R2, and one ends of the transient diode TVS3 connected to the input line IN1 and the input line IN2 are located between the self-recovery fuse PPTC1 and the resistor R1, and between the self-recovery fuse PPTC2 and the resistor R2, respectively.
Further, in the above-mentioned case,
the power filtering unit and the signal filtering unit both include: feed-through capacitor C1, feed-through capacitor C2, common mode coil L1, differential mode capacitor C3, common mode capacitor C4 and common mode capacitor C5;
the feed-through capacitor C1 is arranged on an input line C1, and the feed-through capacitor C2 is arranged on an input line IN 2;
the feed-through capacitor C1 and the feed-through capacitor C2 are used for high-frequency common-mode filtering;
a first winding of the common-mode coil L1 is arranged on an input line IN1 IN series with the feed-through capacitor C1; a second winding of the common mode coil L1 is arranged on an input line IN2 IN series with the feed-through capacitor C2;
the common-mode coil L1 is used for common-mode filtering;
one end of the differential mode capacitor C3 is connected with an input line IN1, and the other end of the differential mode capacitor C3 is connected with an input line IN 2;
the differential mode capacitor C3 is used for differential mode filtering;
one end of the common mode capacitor C4 is connected with an input line IN1, and the other end of the common mode capacitor C4 is grounded; one end of the common-mode capacitor C5 is connected with an input line IN2, and the other end of the common-mode capacitor C5 is grounded;
the common mode capacitance C4 and the common mode capacitance C5 are used for common mode filtering.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
this scheme is through setting up lightning protection switching module in the switching box of shielding computer lab, lightning protection switching module is through the electric current that the discharge exceeds predetermined voltage threshold, the realization is to power supply line and the signal line in the computer lab lightning protection processing, still realize carrying out filtering processing to power supply line and the signal line in the computer lab through differential mode filtering and common mode filtering, avoid passing in and out the inside power supply line and the signal line of shielding computer lab because of thunder and lightning in the natural environment, or the switching of overvoltage and high-power inductive load in the electric power system arouses the fluctuation and the fluctuation of voltage on power cable or the signal cable, lead to equipment scaling loss, communication stop scheduling problem.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a system diagram illustrating a lightning protection patching system for shielding a room in accordance with an exemplary embodiment;
FIG. 2 is a schematic electrical schematic diagram of a power lightning protection transition module according to another exemplary embodiment;
FIG. 3 is a schematic circuit diagram of a signal lightning transition module according to another exemplary embodiment;
in the drawings: 1-power lightning protection switching module and 2-signal lightning protection switching module.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a schematic system diagram illustrating a lightning protection switching system for a shielded room according to an exemplary embodiment, where the system includes:
lightning protection switching module: the lightning protection device is used for performing lightning protection treatment on a power supply circuit and a signal circuit in the machine room by discharging current exceeding a preset voltage threshold;
the lightning protection switching module is also used for filtering a power supply circuit and a signal circuit in the machine room through differential mode filtering and common mode filtering;
the lightning protection switching module comprises a power supply lightning protection switching module 1 and a signal lightning protection switching module 2;
the power supply lightning protection switching module 1 is used for performing lightning protection filtering processing on a power supply circuit in a machine room, and the signal lightning protection switching module 2 is used for performing lightning protection filtering processing on a signal circuit in the machine room;
the lightning protection switching module is arranged in a lightning protection switching box of the machine room;
it can be understood that, in this embodiment, a lightning protection switching module is disposed in the switching box, the lightning protection switching module includes a power lightning protection switching module 1 and a signal lightning protection switching module 2, the power lightning protection switching module 1 discharges a large current exceeding a certain voltage threshold on a power line passing in and out of the shielding machine room, and simultaneously filters a current on the power line through differential mode and common mode filtering to implement lightning protection processing on the power line, the signal lightning protection switching module 2 discharges a large current exceeding a certain voltage threshold on a line passing in and out of the shielding machine room, and the differential mode and common mode filtering filters a current on the signal line to implement lightning protection processing on the signal line, thereby effectively avoiding the power line passing in and out of the shielding machine room and the signal line from lightning in a natural environment, or over-voltage in the power system and switching of high-power inductive loads cause fluctuation and fluctuation of voltage on the power cable or the signal cable, resulting in problems of equipment burning and communication stop.
Further, in the above-mentioned case,
the power supply lightning protection switching module 1 comprises a power supply lightning protection unit and a power supply filtering unit;
the signal lightning protection switching module 2 comprises a signal lightning protection unit and a signal filtering unit;
the power supply lightning protection unit comprises a power supply primary lightning protection unit and a power supply secondary lightning protection unit;
the signal lightning protection unit comprises a signal primary lightning protection unit and a signal secondary lightning protection unit;
it can be understood that, in this embodiment, the power lightning protection switching module 1 includes a power lightning protection unit and a power filter unit, where the power lightning protection unit is configured to discharge a large current exceeding a preset voltage threshold on a power line, and the power filter unit is configured to perform differential mode and common mode filtering on a current passing through the power lightning protection unit, so as to implement lightning protection processing on the power line; including signal lightning protection unit and signal filtering unit in the signal lightning protection switching module 2, the signal lightning protection unit is used for bleeding the heavy current that surpasss predetermined voltage threshold value on the signal line, the signal filtering unit for carry out differential mode and common mode filtering to the electric current through the signal lightning protection unit and handle, with this realization to the lightning protection of signal line, the power lightning protection unit includes the elementary lightning protection unit of power and the secondary lightning protection unit of power, the elementary lightning protection unit of power is used for bleeding the more voltage or the electric current of surpassing rated voltage, the secondary lightning protection unit of power is used for bleeding the less voltage or the electric current of surpassing rated voltage, such design can make the power control of rear end in more accurate within range, signal lightning protection unit is the same reason.
Further, in the above-mentioned case,
the primary lightning protection unit of the power supply comprises: a piezoresistor R1, a piezoresistor R2 and a piezoresistor R3;
one end of the piezoresistor R1 is connected with an input line IN1, and the other end of the piezoresistor R1 is connected with an input IN 2;
one end of the piezoresistor R2 is connected with an input line IN2, and the other end of the piezoresistor R2 is grounded;
one end of the piezoresistor R3 is connected with an input line IN1, and the other end of the piezoresistor R3 is grounded;
the primary lightning protection unit of the power supply is used for discharging current exceeding a certain voltage threshold value on a power supply line;
it will be appreciated that when the voltage across the element rises above the ignition voltage, as shown in figure 2, the resistance of the varistor R1, the varistor R2 and the varistor R3 momentarily decreases, so that the circuit formed by the varistors R1, R2 and R3 is conductive, and a large current or voltage is discharged through this conductive circuit.
Further, in the above-mentioned case,
the secondary lightning protection unit of power and the secondary lightning protection unit of signal all includes: a transient diode TVS1, a transient diode TVS2, and a transient diode TVS 3;
one end of the transient diode TVS1 is connected with an input line IN1, and the other end of the transient diode TVS2 is connected with an input line IN 2;
one end of the transient diode TVS2 is connected with an input line IN2, and the other end of the transient diode TVS2 is grounded;
one end of the transient diode TVS3 is connected with the input line IN1 and the input line IN2 respectively, and the other end of the transient diode TVS3 is grounded;
it will be appreciated that, as compared to the varistor, as shown in fig. 2, the TVS transient diode will generate avalanche breakdown beyond the ignition voltage, therefore, the resistance is changed from high resistance to low resistance, the maximum allowable flow of the general piezoresistor is larger than that of the TVS transient diode, but the response speed is faster than that of the TVS transient diode, the loop formed by the piezoresistors is used for discharging more voltage or current than the rated voltage, and the TVS transient diode is used for discharging less voltage or current than the rated voltage, and in the application, the primary lightning protection unit of the power supply adopts a piezoresistor with the flux of 25KA, the secondary lightning protection unit of the power supply adopts a TVS transient diode with the flux of 1KA, the primary lightning protection unit of the power supply is opened to release when the primary lightning protection unit of the power supply exceeds the rated voltage by 2-3 times, and the secondary lightning protection unit of the power supply is opened to release when the secondary lightning protection unit of the power supply exceeds the rated voltage by 1.25-2 times.
Further, in the above-mentioned case,
the primary signal lightning protection unit comprises: a three-pole gas discharge tube GDT 1;
one electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN1, the other electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN2, and the ground electrode of the three-pole gas discharge tube GDT1 is grounded;
the three-pole gas discharge tube GDT1 is used for discharging current exceeding a certain voltage threshold on a signal line;
it can be understood that, as shown in fig. 3, the function of the three-pole gas discharge tube GDT1 is the same as that of the voltage dependent resistors R1, R2 and R3 in the primary lightning protection unit of the power supply, but the gas breakdown of the three-pole gas discharge tube GDT1 occurs when the ignition voltage is reached, and the power saving capacity of the three-pole gas discharge tube GDT1 is small, has less influence on the signal generation, and is more suitable for the signal loop.
Further, in the above-mentioned case,
IN the signal lightning protection unit, a self-recovery fuse PPTC1 is arranged on the input line IN1, a self-recovery fuse PPTC2 is arranged on the input line IN2, and the self-recovery fuse PPTC1 and the self-recovery fuse PPTC2 are used for decoupling and short-circuit protection;
it can be understood that, as shown in fig. 3, when a fault or an abnormality occurs in the circuit, the current rises continuously, and the rising current may damage some important devices or valuable devices in the circuit, and may also burn out the circuit or even cause a fire, through the self-recovery fuse PPTC2 and PPTC1, when the current abnormally rises to a certain height, the self-recovery fuse PPTC2 fuses to cut off the current, thereby playing a role in protecting the safe operation of the circuit.
Further, in the above-mentioned case,
IN the signal lightning protection unit, a resistor R1 is further arranged on the input line IN1, a resistor R2 is arranged on the input line IN2, the self-recovery fuse PPTC1 is connected IN series with the resistor R1, and the self-recovery fuse PPTC2 is connected IN series with the resistor R2;
IN the signal lightning protection unit, one end of the transient diode TVS1 connected with an input line IN1 is positioned between a self-recovery fuse PPTC1 and a resistor R1; one end of the transient diode TVS2, which is connected with the input line IN2, is positioned between the self-recovery fuse PPTC2 and the resistor R2, and one ends of the transient diode TVS3, which are respectively connected with the input line IN1 and the input line IN2, are respectively positioned between the self-recovery fuse PPTC1 and the resistor R1 and between the self-recovery fuse PPTC2 and the resistor R2;
it can be understood that, as shown in fig. 3, in the signal line, impedance matching means that a suitable matching is achieved between a signal source or a transmission line and a load, and impedance matching mainly has two functions of adjusting load power and suppressing signal reflection, in the field of high-frequency signals, when the wavelength of a signal and the length of the transmission line are in the same order, the reflected signal is easy to be mixed with an original signal, thereby affecting signal quality, and high-frequency signal reflection can be effectively reduced and eliminated through impedance matching.
Further, in the above-mentioned case,
the power filtering unit and the signal filtering unit both include: feed-through capacitor C1, feed-through capacitor C2, common mode coil L1, differential mode capacitor C3, common mode capacitor C4 and common mode capacitor C5;
the feed-through capacitor C1 is arranged on an input line C1, and the feed-through capacitor C2 is arranged on an input line IN 2;
the feed-through capacitor C1 and the feed-through capacitor C2 are used for high-frequency common-mode filtering;
a first winding of the common-mode coil L1 is arranged on an input line IN1 IN series with the feed-through capacitor C1; a second winding of the common mode coil L1 is arranged on an input line IN2, IN series with the feed-through capacitor C2;
the common-mode coil L1 is used for common-mode filtering;
one end of the differential mode capacitor C3 is connected with an input line IN1, and the other end of the differential mode capacitor C3 is connected with an input line IN 2;
the differential mode capacitor C3 is used for differential mode filtering;
one end of the common-mode capacitor C4 is connected with an input line IN1, and the other end of the common-mode capacitor C4 is grounded; one end of the common-mode capacitor C5 is connected with an input line IN2, and the other end of the common-mode capacitor C5 is grounded;
the common-mode capacitor C4 and the common-mode capacitor C5 are used for common-mode filtering;
it can be understood that, as shown in fig. 2 or fig. 3, a differential mode LC filter is formed by the sum of the leakage inductance of the common mode coil L1 and the differential mode capacitor C3, and functions to filter differential mode noise, while the feed-through capacitor C1, the feed-through capacitor C2, the common mode coil L1, the common mode capacitor C4 and the common mode capacitor C5 form a pi-type filter, which functions to filter common mode filtering, and filters high frequency interference generated by lightning strike or surge in a common mode and a differential mode.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. The utility model provides a lightning protection switching system for shielding computer lab which characterized in that, the system includes:
lightning protection switching module: the lightning protection device is used for performing lightning protection treatment on a power supply circuit and a signal circuit in the machine room by discharging current exceeding a preset voltage threshold;
the lightning protection switching module is also used for filtering a power supply circuit and a signal circuit in the machine room through differential mode filtering and common mode filtering;
the lightning protection switching module comprises a power supply lightning protection switching module and a signal lightning protection switching module;
the power supply lightning protection switching module is used for performing lightning protection filtering processing on a power supply circuit in the machine room, and the signal lightning protection switching module is used for performing lightning protection filtering processing on a signal circuit in the machine room;
the lightning protection switching module is arranged in a lightning protection switching box of the machine room.
2. The system of claim 1,
the power supply lightning protection switching module comprises a power supply lightning protection unit and a power supply filtering unit;
the signal lightning protection switching module comprises a signal lightning protection unit and a signal filtering unit;
the power supply lightning protection unit comprises a power supply primary lightning protection unit and a power supply secondary lightning protection unit;
the signal lightning protection unit comprises a signal primary lightning protection unit and a signal secondary lightning protection unit.
3. The system of claim 2,
the primary lightning protection unit of the power supply comprises: a piezoresistor R1, a piezoresistor R2 and a piezoresistor R3;
one end of the voltage-dependent resistor R1 is connected with an input line IN1, and the other end of the voltage-dependent resistor R1 is connected with an input IN 2;
one end of the piezoresistor R2 is connected with an input line IN2, and the other end of the piezoresistor R2 is grounded;
one end of the piezoresistor R3 is connected with an input line IN1, and the other end of the piezoresistor R3 is grounded;
the primary lightning protection unit of the power supply is used for discharging current exceeding a certain voltage threshold value on a power supply line.
4. The method of claim 3,
the secondary lightning protection unit of power and the secondary lightning protection unit of signal all includes: a transient diode TVS1, a transient diode TVS2, and a transient diode TVS 3;
one end of the transient diode TVS1 is connected with an input line IN1, and the other end of the transient diode TVS2 is connected with an input line IN 2;
one end of the transient diode TVS2 is connected with an input line IN2, and the other end of the transient diode TVS2 is grounded;
one end of the transient diode TVS3 is connected to the input line IN1 and the input line IN2, and the other end of the transient diode TVS3 is grounded.
5. The system of claim 4,
the primary signal lightning protection unit comprises: a three-pole gas discharge tube GDT 1;
one electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN1, the other electrode of the three-pole gas discharge tube GDT1 is connected to the input line IN2, and the ground electrode of the three-pole gas discharge tube GDT1 is grounded;
the three-pole gas discharge tube GDT1 is used to bleed current on the signal line above a certain voltage threshold.
6. The system of claim 5,
IN the signal lightning protection unit, a self-recovery fuse PPTC1 is arranged on the input line IN1, a self-recovery fuse PPTC2 is arranged on the input line IN2, and the self-recovery fuse PPTC1 and the self-recovery fuse PPTC2 are used for decoupling and short-circuit protection.
7. The system of claim 6,
IN the signal lightning protection unit, a resistor R1 is further arranged on the input line IN1, a resistor R2 is arranged on the input line IN2, the self-recovery fuse PPTC1 is connected IN series with the resistor R1, and the self-recovery fuse PPTC2 is connected IN series with the resistor R2;
IN the signal lightning protection unit, one end of the transient diode TVS1 connected with an input line IN1 is positioned between a self-recovery fuse PPTC1 and a resistor R1; one end of the transient diode TVS2 connected to the input line IN2 is located between the self-recovery fuse PPTC2 and the resistor R2, and one ends of the transient diode TVS3 connected to the input line IN1 and the input line IN2 are located between the self-recovery fuse PPTC1 and the resistor R1, and between the self-recovery fuse PPTC2 and the resistor R2, respectively.
8. The system of claim 7,
the power filtering unit and the signal filtering unit both include: feed-through capacitor C1, feed-through capacitor C2, common mode coil L1, differential mode capacitor C3, common mode capacitor C4 and common mode capacitor C5;
the feed-through capacitor C1 is arranged on an input line C1, and the feed-through capacitor C2 is arranged on an input line IN 2;
the feed-through capacitor C1 and the feed-through capacitor C2 are used for high-frequency common-mode filtering;
a first winding of the common-mode coil L1 is arranged on an input line IN1 IN series with the feed-through capacitor C1; a second winding of the common mode coil L1 is arranged on an input line IN2 IN series with the feed-through capacitor C2;
the common-mode coil L1 is used for common-mode filtering;
one end of the differential mode capacitor C3 is connected with an input line IN1, and the other end of the differential mode capacitor C3 is connected with an input line IN 2;
the differential mode capacitor C3 is used for differential mode filtering;
one end of the common-mode capacitor C4 is connected with an input line IN1, and the other end of the common-mode capacitor C4 is grounded; one end of the common-mode capacitor C5 is connected with an input line IN2, and the other end of the common-mode capacitor C5 is grounded;
the common mode capacitance C4 and the common mode capacitance C5 are used for common mode filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611068.8A CN114844018A (en) | 2022-05-31 | 2022-05-31 | Lightning protection switching system for shielding machine room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611068.8A CN114844018A (en) | 2022-05-31 | 2022-05-31 | Lightning protection switching system for shielding machine room |
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| CN202210611068.8A Pending CN114844018A (en) | 2022-05-31 | 2022-05-31 | Lightning protection switching system for shielding machine room |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090244800A1 (en) * | 2008-03-28 | 2009-10-01 | Timothy Craig Wedley | Surge protection apparatus and methods |
| CN203482331U (en) * | 2013-09-27 | 2014-03-12 | 深圳市安恩达科技有限公司 | Building intercommunication system structure having function of lightning protection |
| EP2903113A1 (en) * | 2014-01-31 | 2015-08-05 | Beijing Tonlier Energy Technology Co., Ltd. | Surge protection circuit |
| CN205317831U (en) * | 2015-11-30 | 2016-06-15 | 国家电网公司 | Integration arrester on -line monitoring protection system |
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| CN206542591U (en) * | 2016-11-16 | 2017-10-03 | 深圳市亚美达通讯设备有限公司 | A kind of safe street lamp signal acquisition control system |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090244800A1 (en) * | 2008-03-28 | 2009-10-01 | Timothy Craig Wedley | Surge protection apparatus and methods |
| CN203482331U (en) * | 2013-09-27 | 2014-03-12 | 深圳市安恩达科技有限公司 | Building intercommunication system structure having function of lightning protection |
| EP2903113A1 (en) * | 2014-01-31 | 2015-08-05 | Beijing Tonlier Energy Technology Co., Ltd. | Surge protection circuit |
| CN205317831U (en) * | 2015-11-30 | 2016-06-15 | 国家电网公司 | Integration arrester on -line monitoring protection system |
| CN206542591U (en) * | 2016-11-16 | 2017-10-03 | 深圳市亚美达通讯设备有限公司 | A kind of safe street lamp signal acquisition control system |
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