CN210577760U - Protector of surge protector - Google Patents
Protector of surge protector Download PDFInfo
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- CN210577760U CN210577760U CN201922125600.1U CN201922125600U CN210577760U CN 210577760 U CN210577760 U CN 210577760U CN 201922125600 U CN201922125600 U CN 201922125600U CN 210577760 U CN210577760 U CN 210577760U
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- surge protector
- current transformer
- switch
- protector
- signal acquisition
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Abstract
The utility model relates to a protector of a surge protector, which comprises an isolating switch, a shunt excitation coil, a current transformer, a surge protector, a fuse, an alarm signal lamp and a signal acquisition and processing device; one end of the surge protector is connected with one end of the isolating switch through the current transformer, and one end of the isolating switch is also connected with the negative electrode of the shunt excitation coil; the utility model discloses can not produce the delay phenomenon when the thunder and lightning flows through, self can not produce voltage yet and lead to the voltage stack, can not make the rear end consumer that connects bear unpredictable high voltage, handles with the help of signal acquisition processing apparatus's digitization for action criterion and duration are all very quick, accurate, and can set up different protection parameters according to the surge protector of different specifications, and easily adjust.
Description
Technical Field
The utility model relates to a surge protector's protection device.
Background
Various lightning protection buildings are provided with external lightning protection devices for preventing direct lightning and adopt measures for preventing lightning surge intrusion; at present, the commonly adopted measures for preventing the flashover surge from invading are to add surge protectors on buses of all levels of distribution circuits; when the lightning surge invades, the surge protector is conducted to discharge the lightning current to the ground and can suppress the overvoltage level; the surge protector is composed of zinc oxide valve plates, and has power frequency follow current of 0.01 mA-0.02 mA during normal work.
After the surge protector operates for a long time, the zinc oxide material is gradually degraded, when the power frequency leakage current reaches 100mA or more, the zinc oxide valve plate generates heat seriously, the possibility of fire burning of the packaging shell of the surge protector is caused, and therefore, a protection device needs to be additionally arranged on the power supply side of the surge protector, so that the surge protector is cut off from a power grid before a burning accident occurs.
The protection device of the existing surge protector has three modes: the first is to adopt a miniature circuit breaker as a protection device of a surge protector; the second is to adopt a fuse as a protection device of the surge protector; the third is a protection device formed by connecting a gas discharge tube and a miniature circuit breaker in parallel.
In the first mode, when the protector is actually used, the power frequency leakage current of 100mA or more can possibly cause the encapsulation shell of the surge protector to be ignited and burnt, but the current value is far smaller than the rated current value of the miniature circuit breaker, so that the miniature circuit breaker cannot trip, the fault surge protector cannot be cut off from a circuit, and the function of protecting the surge protector cannot be realized, and the miniature circuit breaker is infeasible as a protection device of the surge protector in principle; the fuse in the second mode has no inductance, does not generate superposed voltage, does not destroy the protection function of the surge protector, but selects a fuse link with larger current which is far larger than the power frequency leakage current which can generate fire hazard of the surge protector in order to avoid lightning large current and not fuse; when the surge protector generates dangerous power frequency leakage current, the fuse cannot be fused, and the function of protecting the surge protector cannot be achieved; in the third mode, lightning current is conducted through the gas discharge tube; the power frequency follow current of the surge protector can not pass through the gas discharge tube and is conducted by a miniature circuit breaker loop; when the power frequency leakage current of the surge protector is large, the miniature circuit breaker operates to trip to protect the surge protector, but the action of the gas discharge tube has a delay phenomenon, namely when the lightning current comes, the surge protector limits the voltage to have a delay, which is unfavorable for protecting rear-end electric equipment; therefore, further improvements are awaited.
SUMMERY OF THE UTILITY MODEL
To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a can not produce delay phenomenon when the thunder and lightning circulation passes through is provided, self can not produce voltage yet and lead to the voltage stack to effectively avoid the rear end to connect consumer to bear unpredictable high voltage, and the surge protector's of easy adjustment protection device.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a protection device of a surge protector comprises an isolating switch, a shunt excitation coil, a current transformer, the surge protector, a fuse, an alarm signal lamp and a signal acquisition and processing device, and is characterized in that one end of the surge protector is connected with one end of the isolating switch through the current transformer, and one end of the isolating switch is also connected with the negative electrode of the shunt excitation coil; the signal acquisition and processing device is connected with the current transformer, the fuse and the alarm signal lamp are arranged on the signal acquisition and processing device, and the signal acquisition and processing device comprises a processing module, a current transformer interface, a device power supply, a trip switch and an alarm switch; the processing module is respectively connected with the device power supply, the trip switch and the alarm switch, and one end of the trip switch is connected with the negative electrode of the shunt excitation coil.
Preferably, the current transformer is connected with the processing module through a current transformer interface.
Preferably, one end of the alarm signal lamp is connected with one end of the alarm switch.
Preferably, one end of the fuse is connected with the positive electrode of the device power supply and the other end of the alarm switch.
Compared with the prior art, the utility model has the advantages of: the utility model discloses can not produce the delay phenomenon when the thunder and lightning flows through, self can not produce voltage yet and lead to the voltage stack, can not make the rear end meet consumer and bear unpredictable high voltage. And when the power frequency leakage current of the surge protector reaches a certain value and the duration time exceeds a set value, the surge protector acts to trip. By means of the digital processing of the signal acquisition processing device 7, the action criterion and the duration are very quick and accurate, different protection parameters can be set according to surge protectors of different specifications, and the adjustment is easy.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, a protection device of a surge protector comprises an isolating switch 1, a shunt coil 2, a current transformer 3, a surge protector 4, a fuse 5, an alarm signal lamp 6 and a signal acquisition and processing device 7; one end of the surge protector 4 is connected with one end of the isolating switch 1 through the current transformer 3, and one end of the isolating switch 1 is also connected with the negative electrode of the shunt excitation coil 2; the signal acquisition and processing device 7 is connected with the current transformer 3, the fuse 5 and the alarm signal lamp 6 are arranged on the signal acquisition and processing device 7, and the signal acquisition and processing device 7 comprises a processing module 12, a current transformer interface 8, a device power supply 9, a trip switch 10 and an alarm switch 11; the processing module 12 is respectively connected with the device power supply 9, the trip switch 10 and the alarm switch 11, the current transformer 3 is connected with the processing module 12 through a current transformer interface 8, one end of the alarm signal lamp 6 is connected with one end of the alarm switch 11, and one end of the trip switch 10 is connected with the negative electrode of the shunt excitation coil 2; one end of the fuse 5 is connected with the anode of the device power supply 9 and the other end of the alarm switch 11.
When in use: connecting the other end of the isolating switch 1 and the anode of the shunt excitation coil 2 into a live wire of the mains supply; respectively connecting the negative pole and the grounding end of a device power supply 9 to a zero line and a grounding line of commercial power; the other end of the trip switch 10 and the other end of the alarm signal lamp 6 are both connected to a zero line of commercial power; and the other end of the fuse 5 is connected to a live wire of the mains supply.
The working principle is as follows: when the circuit works normally, the isolating switch 1 is closed, and the auxiliary contact of the shunt excitation coil 2 is in a closed position; when lightning current comes, the lightning current is led into the surge protector 4 through the isolating switch 1, and the surge protector 4 acts; when the surge protector 4 has a fault, the power frequency leakage current of the surge protector 4 is detected by the current transformer 3 and then transmitted to the processing module 12 in the signal acquisition and processing device 7, and the processing module 12 can test and analyze the numerical value of the power frequency leakage current; when the power frequency leakage current meets the set tripping condition, the normally open point of the outlet of the tripping switch 10 is closed, the shunt coil 2 is electrified to drive the isolating switch 1 to trip, the power frequency leakage current of the surge protector 4 is cut off, the surge protector 4 is protected, and the alarm signal lamp 6 is turned on; before resetting, the alarm signal lamp 6 is always on, and faults can be reported to remote operators on duty through a Profibus-DP communication mode.
The utility model discloses can not produce the delay phenomenon when the thunder and lightning flows through, self can not produce voltage yet and lead to the voltage stack, can not make the rear end meet consumer and bear unpredictable high voltage. And when the power frequency leakage current of the surge protector reaches a certain value and the duration time exceeds a set value, the surge protector acts to trip. By means of the digital processing of the signal acquisition processing device 7, the action criterion and the duration are very quick and accurate, different protection parameters can be set according to surge protectors of different specifications, and the adjustment is easy.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. A protection device of a surge protector comprises an isolating switch, a shunt excitation coil, a current transformer, the surge protector, a fuse, an alarm signal lamp and a signal acquisition and processing device, and is characterized in that one end of the surge protector is connected with one end of the isolating switch through the current transformer, and one end of the isolating switch is also connected with the negative electrode of the shunt excitation coil; the signal acquisition and processing device is connected with the current transformer, the fuse and the alarm signal lamp are arranged on the signal acquisition and processing device, and the signal acquisition and processing device comprises a processing module, a current transformer interface, a device power supply, a trip switch and an alarm switch; the processing module is respectively connected with the device power supply, the trip switch and the alarm switch, and one end of the trip switch is connected with the negative electrode of the shunt excitation coil.
2. The surge protector protection device of claim 1, wherein the current transformer is connected to the processing module via a current transformer interface.
3. The surge protector protection device of claim 1, wherein one end of said alarm signal is connected to one end of said alarm switch.
4. The surge protector protection device of claim 1, wherein one end of said fuse is connected to both the positive terminal of the device power supply and the other end of the alarm switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922125600.1U CN210577760U (en) | 2019-12-02 | 2019-12-02 | Protector of surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922125600.1U CN210577760U (en) | 2019-12-02 | 2019-12-02 | Protector of surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210577760U true CN210577760U (en) | 2020-05-19 |
Family
ID=70633376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922125600.1U Active CN210577760U (en) | 2019-12-02 | 2019-12-02 | Protector of surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210577760U (en) |
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2019
- 2019-12-02 CN CN201922125600.1U patent/CN210577760U/en active Active
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| GR01 | Patent grant | ||
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Address after: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee after: Zhongcai International Intelligent Technology Co.,Ltd. Address before: 303 Hanzhongmen street, Gulou District, Nanjing City, Jiangsu Province Patentee before: NANJING KISEN INTERNATIONAL ENGINEERING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |