CN220357230U - Lightning arrester monitoring device - Google Patents
Lightning arrester monitoring device Download PDFInfo
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- CN220357230U CN220357230U CN202321966929.0U CN202321966929U CN220357230U CN 220357230 U CN220357230 U CN 220357230U CN 202321966929 U CN202321966929 U CN 202321966929U CN 220357230 U CN220357230 U CN 220357230U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 101000645421 Homo sapiens Transmembrane protein 165 Proteins 0.000 description 2
- 102100025755 Transmembrane protein 165 Human genes 0.000 description 2
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- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a lightning arrester monitoring device, which mainly solves the problems that a lightning arrester monitor in the prior art is limited by the type of an ammeter in an internal circuit of the lightning arrester monitor, can only be a linear monitor or a nonlinear monitor, cannot have both a linear monitor function and a nonlinear monitor function, and has larger limitation in the use process. The device comprises a discharge counting module, a protection module, a rectifying and filtering module and a monitoring module; the voltage regulator further comprises an adjusting resistor RB2, a zener diode Z1 and an adjusting resistor RB3; one fixed end of the adjusting resistor RB2 is connected with the adjusting end and is connected with the input end of the ammeter A; the other fixed end of the adjusting resistor RB2 is connected with the output high end of the first bridge rectifier circuit and the cathode of the voltage stabilizing diode Z1, the anode of the voltage stabilizing diode Z1 is connected with one fixed end of the adjusting resistor RB3, and the other fixed end of the adjusting resistor RB3 is connected with the adjusting end and is connected with the output end of the ammeter A.
Description
Technical Field
The utility model relates to a monitoring device, in particular to a lightning arrester monitoring device.
Background
The lightning arrester monitor is a device for monitoring the operating condition of the lightning arrester, and the monitored parameters include leakage current and action times of the lightning arrester. As shown in fig. 3, the existing monitors for the lightning arrester are divided into a linear monitor and a nonlinear monitor, and when the ammeter in the monitor circuit for the lightning arrester is a linear ammeter, the monitors are linear monitors; when the ammeter in the monitor circuit for the lightning arrester is a nonlinear ammeter, the monitor is a nonlinear monitor.
The monitor for the lightning arrester in the prior art is limited by the type of an ammeter in an internal circuit of the monitor, can be a linear monitor or a nonlinear monitor, cannot have both a linear monitor function and a nonlinear monitor function, and has a larger limitation in the use process.
Disclosure of Invention
The utility model aims to solve the problems that a monitor for a lightning arrester in the prior art is limited by the type of an ammeter in an internal circuit of the monitor, can only be a linear monitor or a nonlinear monitor, cannot have both the linear monitor function and the nonlinear monitor function, and has larger limitation in the use process.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a lightning arrester monitoring device comprises a discharge counting module, a protection module, a rectifying and filtering module and a monitoring module; the protection module is used for being connected to the grounding end of the monitored lightning arrester; the input end of the discharge counting module is connected with the input end of the protection module; the protection module, the rectifying and filtering module and the monitoring module are connected in sequence;
the rectifying and filtering module comprises a first bridge rectifying circuit and a capacitor C1 connected in parallel between the output high end and the output low end of the first bridge rectifying circuit;
the monitoring module comprises an ammeter A and a diode D9, and the resistor RB1 is adjusted; the adjusting resistor RB1 is connected in parallel with two ends of the ammeter A, the anode of the diode D9 is connected with the input end of the ammeter A, and the cathode of the diode D9 is connected with the output end of the ammeter A and the output low end of the first bridge rectifier circuit; the special feature is that:
the voltage regulator further comprises an adjusting resistor RB2, a zener diode Z1 and an adjusting resistor RB3;
one fixed end of the adjusting resistor RB2 is connected with the adjusting end and is connected with the input end of the ammeter A;
the other fixed end of the adjusting resistor RB2 is connected with the output high end of the first bridge rectifier circuit and the cathode of the voltage stabilizing diode Z1, the anode of the voltage stabilizing diode Z1 is connected with one fixed end of the adjusting resistor RB3, and the other fixed end of the adjusting resistor RB3 is connected with the adjusting end and is connected with the output end of the ammeter A.
Further, the protection module comprises a piezoresistor RV1, a resistor R2, a resistor R3 and a bidirectional conduction diode TVS1;
one end of the resistor R2 is connected with one end of the piezoresistor RV1, the other end of the resistor R2 is connected with one end of the resistor R3 and one end of the bidirectional breakdown diode TVS1, the other end of the resistor R3 is connected with one input end of the first bridge rectifier circuit, and the other end of the bidirectional breakdown diode TVS1 is connected with the other end of the piezoresistor RV1 and the other input end of the first bridge rectifier circuit;
the piezoresistor RV1 is connected in series with the grounding end of the lightning arrester to be monitored.
Further, the on-voltage of the zener diode Z1 and the value formula of the adjusting resistor RB2 are as follows:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; r0 is the resistance value of the ammeter A; r1 is the resistance value of the adjusting resistor RB1; r2 is the resistance value of the adjusting resistor RB 2; i1 is the monitor linear region maximum current scale value.
Further, the value and the maximum range of the adjusting resistor RB3 satisfy the following formula:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; a is the percentage of the linear part to the dial; r3 is the resistance value of the adjusting resistor RB3; i1 is the maximum current scale value of the linear region of the monitor; i2 is the monitor nonlinear region maximum current scale value.
Compared with the prior art, the utility model has the beneficial effects that:
the regulating resistor, the zener diode and the shunt resistor are newly added on the basis of the existing monitor circuit for the lightning arrester, so that when the voltage flowing through the regulating resistor RB1 and the ammeter A is smaller than the conduction voltage of the zener diode, the ammeter in the monitor can work in a linear interval; when the voltage flowing through the adjusting resistor RB1 and the ammeter A is larger than the voltage of the zener diode, the branch where the zener diode is located can be shunted, so that the nonlinear working purpose of the monitor is realized, and the application range of the linear ammeter is widened.
Drawings
Fig. 1 is a schematic circuit diagram of a surge arrester monitoring device of the present utility model;
FIG. 2 is a schematic view of a nonlinear ammeter dial of a lightning arrester monitoring device of the present utility model;
fig. 3 is a schematic circuit diagram of a prior art monitor for a lightning arrester.
In the figure, a 1-discharge counting module, a 2-protection module, a 3-rectifying and filtering module and a 4-monitoring module.
Detailed Description
To make the objects, advantages and features of the present utility model more apparent, a lightning arrester monitoring device according to the present utility model will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present utility model will become more apparent from the following detailed description.
As shown in fig. 1, the lightning arrester monitoring device comprises a discharge counting module 1, a protection module 2, a rectifying and filtering module 3 and a monitoring module 4; the protection module 2 is used for being connected to the grounding end of the monitored lightning arrester; the input end of the discharge counting module 1 is connected with the input end of the protection module 2; the protection module 2, the rectifying and filtering module 3 and the monitoring module 4 are sequentially connected; the rectifying and filtering module 3 comprises a first bridge rectifying circuit and a capacitor C1 connected in parallel between the output high end and the output low end of the first bridge rectifying circuit.
The monitoring module 4 comprises an ammeter A and a diode D9, and adjusts a resistor RB1; the adjusting resistor RB1 is connected in parallel to two ends of the ammeter A, the anode of the diode D9 is connected with the input end of the ammeter A, and the cathode of the diode D9 is connected with the output end of the ammeter A and the output low end of the first bridge rectifier circuit.
The monitoring module 4 further comprises an adjusting resistor RB2, a zener diode Z1 and an adjusting resistor RB3; one fixed end of the adjusting resistor RB2 is connected with the adjusting end and is connected with the input end of the ammeter A; the other fixed end of the adjusting resistor RB2 is connected with the output high end of the first bridge rectifier circuit and the cathode of the voltage stabilizing diode Z1, the anode of the voltage stabilizing diode Z1 is connected with one fixed end of the adjusting resistor RB3, and the other fixed end of the adjusting resistor RB3 is connected with the adjusting end and is connected with the output end of the ammeter A.
The formulas of the conduction voltage of the zener diode Z1 and the value of the adjusting resistor RB2 are as follows:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; r0 is the resistance value of the ammeter A; r1 is the resistance value of the adjusting resistor RB1; r2 is the resistance value of the adjusting resistor RB 2; i1 is the monitor linear region maximum current scale value.
The value and the maximum range of the adjusting resistor RB3 satisfy the following formula:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; a is the percentage of the linear part to the dial; r3 is the resistance value of the adjusting resistor RB3; i1 is the monitor linear region maximumA current scale value; i2 is the monitor nonlinear region maximum current scale value.
The protection module 2 comprises a piezoresistor RV1, a resistor R2, a resistor R3 and a bidirectional conduction diode TVS1; one end of a resistor R2 is connected with one end of a piezoresistor RV1, the other end of the resistor R2 is connected with one end of a resistor R3 and one end of a two-way breakdown diode TVS1, the other end of the resistor R3 is connected with one input end of a first bridge rectifier circuit, and the other end of the two-way breakdown diode TVS1 is connected with the other end of the piezoresistor RV1 and the other input end of the first bridge rectifier circuit; the piezoresistor RV1 is connected in series with the grounding end of the lightning arrester to be monitored.
The discharge counting module 1 comprises a resistor R1, a gas discharge tube GDT1, a piezoresistor RV2, a second bridge rectifier circuit comprising diodes D1, D2, D3 and D4, a capacitor C2 connected with the output high end and the output low end of the second bridge rectifier circuit in parallel and a discharge counter JS;
the piezoresistor RV2 is connected in parallel with two input ends of the second bridge rectifying circuit, and the resistor R1 and the gas discharge tube GDT1 are connected in series with one input end of the second bridge rectifying circuit.
In the working process, when the voltage flowing through the adjusting resistor RB1 and the ammeter A is smaller than the conducting voltage of the zener diode Z1, the ammeter in the monitor can work in a linear interval; when the voltage flowing through the adjusting resistor RB1 and the ammeter A is larger than the voltage of the voltage stabilizing diode Z1, the branch where the voltage stabilizing diode Z1 is located can be divided, and the purpose of linear operation and nonlinear operation of the monitor can be achieved by adopting the circuit meter dial with the meter head shown in fig. 2, so that the monitoring range of the linear ammeter is widened, and the measuring precision of the monitor in a small flow range is enhanced.
Claims (4)
1. A lightning arrester monitoring device comprises a discharge counting module (1), a protection module (2), a rectifying and filtering module (3) and a monitoring module (4); the protection module (2) is used for being connected to the grounding end of the monitored lightning arrester; the input end of the discharge counting module (1) is connected with the input end of the protection module (2); the protection module (2), the rectifying and filtering module (3) and the monitoring module (4) are sequentially connected;
the rectifying and filtering module (3) comprises a first bridge rectifying circuit and a capacitor C1 connected in parallel between the output high end and the output low end of the first bridge rectifying circuit;
the monitoring module (4) comprises an ammeter A and a diode D9, and the resistor RB1 is adjusted; the adjusting resistor RB1 is connected in parallel with two ends of the ammeter A, the anode of the diode D9 is connected with the input end of the ammeter A, and the cathode of the diode D9 is connected with the output end of the ammeter A and the output low end of the first bridge rectifier circuit;
the method is characterized in that:
the voltage regulator further comprises an adjusting resistor RB2, a zener diode Z1 and an adjusting resistor RB3;
one fixed end of the adjusting resistor RB2 is connected with the adjusting end and is connected with the input end of the ammeter A;
the other fixed end of the adjusting resistor RB2 is connected with the output high end of the first bridge rectifier circuit and the cathode of the voltage stabilizing diode Z1, the anode of the voltage stabilizing diode Z1 is connected with one fixed end of the adjusting resistor RB3, and the other fixed end of the adjusting resistor RB3 is connected with the adjusting end and is connected with the output end of the ammeter A.
2. A lightning arrester monitoring device according to claim 1, wherein: the protection module (2) comprises a piezoresistor RV1, a resistor R2, a resistor R3 and a bidirectional conduction diode TVS1;
one end of the resistor R2 is connected with one end of the piezoresistor RV1, the other end of the resistor R2 is connected with one end of the resistor R3 and one end of the bidirectional breakdown diode TVS1, the other end of the resistor R3 is connected with one input end of the first bridge rectifier circuit, and the other end of the bidirectional breakdown diode TVS1 is connected with the other end of the piezoresistor RV1 and the other input end of the first bridge rectifier circuit;
the piezoresistor RV1 is connected in series with the grounding end of the lightning arrester to be monitored.
3. A lightning arrester monitoring device according to claim 2, wherein: the formulas of the turn-on voltage of the zener diode Z1 and the value of the adjusting resistor RB2 are as follows:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; r0 is the resistance value of the ammeter A; r1 is the resistance value of the adjusting resistor RB1; r2 is the resistance value of the adjusting resistor RB 2; i1 is the monitor linear region maximum current scale value.
4. A lightning arrester monitoring device according to claim 3, wherein: the value and the maximum range of the adjusting resistor RB3 satisfy the following formula:
wherein: u (U) Z1 Is the turn-on voltage of the zener diode Z1; a is the percentage of the linear part to the dial; r3 is the resistance value of the adjusting resistor RB3; i1 is the maximum current scale value of the linear region of the monitor; i2 is the monitor nonlinear region maximum current scale value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321966929.0U CN220357230U (en) | 2023-07-25 | 2023-07-25 | Lightning arrester monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321966929.0U CN220357230U (en) | 2023-07-25 | 2023-07-25 | Lightning arrester monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220357230U true CN220357230U (en) | 2024-01-16 |
Family
ID=89480067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321966929.0U Active CN220357230U (en) | 2023-07-25 | 2023-07-25 | Lightning arrester monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220357230U (en) |
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2023
- 2023-07-25 CN CN202321966929.0U patent/CN220357230U/en active Active
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