CN213585151U - Strong electromagnetic pulse protection device with degradation monitoring function - Google Patents
Strong electromagnetic pulse protection device with degradation monitoring function Download PDFInfo
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- CN213585151U CN213585151U CN202022984681.3U CN202022984681U CN213585151U CN 213585151 U CN213585151 U CN 213585151U CN 202022984681 U CN202022984681 U CN 202022984681U CN 213585151 U CN213585151 U CN 213585151U
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Abstract
The utility model relates to a strong electromagnetic pulse protection device with degradation monitoring, which comprises a first protector and a degradation data collector; the first protector is connected between the unprotected end and the protected end of the direct current power supply, and adopts a protection element comprising a piezoresistor and a gas discharge tube to absorb surge current fed in from the positive pole or/and the negative pole of the unprotected end of the direct current power supply and prevent the surge current from entering the protected end; adopting a non-contact current sensor to sense surge current information fed in from the anode or/and the cathode; the deterioration data collector is connected with the first protector and used for collecting surge current information induced by the first protector, filtering, conditioning and performing analog-to-digital conversion to obtain current data of a protection element in the first protector, wherein the current data is used as deterioration data of the protection element and used for deterioration monitoring. The utility model discloses can reduce the electromagnetic stress of forceful electric power electromagnetic pulse effect in each equipment cable net, guarantee electronic equipment's safety improves the reliability of system.
Description
Technical Field
The utility model relates to a forceful electric magnetism protects technical field, especially relates to a forceful electric magnetism pulse protector with degradation monitoring.
Background
The key protection components and parts that the strong electromagnetic pulse protector adopted do work in the system loop to ground, and in case the protection components breaks down, not only can not play the guard action, when short-circuit fault appears moreover, what in addition can cause the outage, even the conflagration breaks out, all probably causes very big injury to personnel and equipment, consequently, need real-time supervision and predetermine protector's operating condition or fault information in advance to and protector degradation process.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention is directed to a strong electromagnetic pulse protection device with degradation monitoring, which solves the problems of electromagnetic pulse protection and degradation monitoring.
The purpose of the utility model is mainly realized through the following technical scheme:
a strong electromagnetic pulse protection device with degradation monitoring comprises a first protector and a degradation data collector;
the first protector is connected between the unprotected end and the protected end of the direct current power supply, and surge current fed in from the positive pole or/and the negative pole of the unprotected end of the direct current power supply is absorbed by adopting a protection element comprising a piezoresistor and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the anode or/and the cathode;
the deterioration data collector is connected with the first protector and used for collecting surge current information induced by the first protector to obtain current data of a protection element in the first protector, and the current data is used as deterioration data of the protection element in the first protector and used for deterioration monitoring.
Further, the first protector comprises a voltage dependent resistor MOV1, a voltage dependent resistor MOV2, a gas discharge tube GDT1, a temperature fuse TF1, a non-contact current sensor CT1 and a non-contact current sensor CT 2;
the gas discharge tube GDT1 is a three-end gas discharge tube; the a end of the gas discharge tube GDT1 is connected to the positive electrode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV1 and a temperature fuse TF1 which are connected in series; the b end of the gas discharge tube GDT1 is connected with the cathode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV 2; the ground terminal of the gas discharge tube GDT1 is grounded;
the non-contact current sensor CT1 is sleeved on a positive power supply line of an unprotected end of a direct current power supply, and an induced current output end of the CT1 is connected with a degradation data collector;
the non-contact current sensor CT2 is sleeved on a negative power supply line of a direct current power supply unprotected end, and an induced current output end of the CT2 is connected with a degradation data collector.
Further, the first protector also comprises a temperature fuse TF 2; the temperature fuse TF2 is closely attached to the temperature fuse TF 1; both ends of the temperature fuse TF2 are connected to the degradation data collector, respectively.
Further, the device also comprises a second protector; the second protector is connected between the unprotected end and the protected end of the three-phase alternating current power supply, and surge current fed from the unprotected end of the three-phase alternating current power supply is absorbed by adopting a protection element comprising a piezoresistor and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the three-phase alternating current power supply;
the second protector is connected with the degradation data collector; the deterioration data collector collects surge current information sensed by the second protector to obtain current data of the protection element in the second protector, and the current data is used as deterioration data of the protection element in the second protector for deterioration monitoring.
Further, the second protector comprises a U-path protector, a V-path protector and a W-path protector;
the U-path protector is connected between a U-phase live wire and a zero line N of a three-phase alternating current power supply;
the V-path protector is connected between a V-phase live wire and a zero line N of a three-phase alternating current power supply;
the W-path protector is connected between a W-phase live wire and a zero line N of a three-phase alternating current power supply;
the U-path protector, the V-path protector and the W-path protector have the same circuit structure and respectively absorb surge current fed by a U-phase live wire, a V-phase live wire and a W-phase live wire; and a non-contact current sensor is adopted to sense surge current information fed from the U-phase live wire, the V-phase live wire and the W-phase live wire.
Further, the U-circuit protector comprises a voltage dependent resistor MOV3, a gas discharge tube GDT3, a temperature fuse TF3, and a non-contact current sensor CT 3;
the gas discharge tube GDT3 is a two-end gas discharge tube; the b end of the gas discharge tube GDT3 is connected with a neutral wire N, and the a end of the gas discharge tube GDT3 is connected with a U-phase live wire of three-phase alternating current power supply through a piezoresistor MOV3 and a temperature fuse TF3 which are connected in series;
the non-contact current sensor CT3 is sleeved on a U-phase live wire supplied with three-phase alternating current, and an induced current output end of the CT3 is connected with a degradation data collector.
Further, the U-way protector further comprises a temperature fuse TF 4; the temperature fuse TF4 is closely attached to the temperature fuse TF 3; both ends of the temperature fuse TF4 are connected to the degradation data collector, respectively.
Further, the second protector also comprises a gas discharge tube GDT2, and the gas discharge tube GDT2 is connected between a zero line N and a ground line of the AC three-phase power supply.
Further, a third protector is also included; the third protector is connected between the unprotected end and the protected end of the signal wire, and absorbs surge current fed in from the unprotected end of the signal wire by adopting a protection element comprising a transient suppression diode and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the signal wire;
the third protector is connected with the degradation data collector; and the degradation data collector collects the surge current information induced by the third protector to obtain the current data of the protection element in the third protector, and the current data is used as the degradation data of the protection element in the third protector for degradation monitoring.
Further, the third protector comprises a transient suppression diode TVS, a gas discharge tube GDT4, a temperature fuse TF5, a mechanical electromagnetic relay T1, a non-contact current sensor CT4 and a non-contact current sensor CT 5;
the transient suppression diode TVS and the temperature fuse TF5 form a series circuit which is connected between a TX + line and a TX-line of a signal line; a coil of the mechanical electromagnetic relay T1 is connected with the transient suppression diode TVS in parallel, and two ends of a controlled switch of the mechanical electromagnetic relay T1 are connected with the degradation data collector;
the gas discharge tube GDT4 is a three-terminal gas discharge tube; an a end of the gas discharge tube GDT4 is connected to the TX + line of the signal line; the b-terminal of the gas discharge tube GDT1 is connected to the TX-line of the signal line; the ground terminal of the gas discharge tube GDT4 is grounded;
the non-contact current sensor CT4 is sleeved on a TX + line of the signal line, and an induced current output end of the CT4 is connected with the degradation data collector;
the non-contact current sensor CT5 is sleeved on a TX-wire of the signal wire, and an induced current output end of the CT5 is connected with the degradation data collector. .
The utility model has the advantages as follows:
the utility model discloses can reduce the electromagnetic stress of forceful electric power electromagnetic pulse effect in each equipment cable net, reduce the residual voltage who gets into the system equipment port, guarantee electronic equipment's safety, on-line monitoring forceful electric power electromagnetic pulse protector's protective element degradation degree and fault information have improved the reliability of system simultaneously.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a schematic diagram illustrating the connection of a strong electromagnetic pulse protection device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the connection of the first protector assembly according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the connection of the U-way protector according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the connection of the second protector according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the connection of the third protector assembly in the embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention.
The utility model discloses a strong electromagnetic pulse protection device with degradation monitoring, as shown in figure 1, comprising a first protector, a second protector, a third protector, a degradation data collector, a RS422/CAN transceiving communication component and an upper computer;
specifically, the first protector is connected between an unprotected end and a protected end of the direct current power supply, and a protection element comprising a piezoresistor and a gas discharge tube is adopted to absorb surge current fed in from a positive electrode or/and a negative electrode of the unprotected end of the direct current power supply and prevent the surge current from entering the protected end; adopting a non-contact current sensor to sense surge current information fed in from the anode or/and the cathode;
the deterioration data collector is connected with the first protector and used for collecting surge current information induced by the first protector, filtering, conditioning and performing analog-to-digital conversion to obtain current data of a protection element in the first protector, wherein the current data is used as deterioration data of the protection element and used for deterioration monitoring.
An LC filter assembly as shown in fig. 1 may be further connected between the first protector and the protection terminal to further filter the inrush current, thereby improving the quality of the power supply.
As shown in fig. 2, the first protector comprises piezoresistors MOV1, MOV2, a gas discharge tube GDT1, a temperature fuse TF1, and non-contact current sensors CT1 and CT 2;
the gas discharge tube GDT1 is a three-end gas discharge tube; the a end of the gas discharge tube GDT1 is connected to the positive electrode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV1 and a temperature fuse TF1 which are connected in series; the b end of the gas discharge tube GDT1 is connected with the cathode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV 2; the ground terminal of the gas discharge tube GDT1 is grounded;
the non-contact current sensor CT1 is sleeved on a positive power supply line of an unprotected end of a direct current power supply, and an induced current output end of the CT1 is connected with a degradation data collector;
the non-contact current sensor CT2 is sleeved on a negative power supply line of a direct current power supply unprotected end, and an induced current output end of the CT2 is connected with a degradation data collector.
The first protector also comprises a temperature fuse TF 2; the temperature fuse TF2 is closely attached to the temperature fuse TF 1; both ends of the temperature fuse TF2 are connected to the degradation data collector, respectively.
After a surge current is fed into the positive electrode and/or the negative electrode of the direct current power supply, the piezoresistor MOV1 and the gas discharge tube GDT1 are connected towards the ground, and/or the piezoresistor MOV2 and the gas discharge tube GDT1 are connected towards the ground, the surge current is absorbed, and the non-contact current sensor CT1 and/or CT2 outputs the induced current to the degradation data collector;
when surge current is too large, when the first protector is not enough to be released, the temperature fuse TF1 and the temperature fuse TF2 are too high in heat and fused, the protection element in the first protector is protected by the fusion of the temperature fuse TF1, short-circuit faults are prevented, and after the fusion of the temperature fuse TF2 is collected by the degradation data collector, it can be known that the first protector has faults, and the protection function cannot be provided any more, and the first protector needs to be replaced.
Specifically, the second protector is connected between an unprotected end and a protected end of the three-phase alternating current power supply, and a protection element comprising a piezoresistor and a gas discharge tube is adopted to absorb surge current fed from the unprotected end of the three-phase alternating current power supply and prevent the surge current from entering the protected end; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the three-phase alternating current power supply;
the second protector is connected with the degradation data collector; and the degradation data collector is used for collecting surge current information induced by the second protector, filtering, conditioning and performing analog-to-digital conversion to obtain current data of a protection element in the second protector, and the current data is used as degradation data of the protection element and used for degradation monitoring.
More specifically, the second protector includes a U-way protector, a V-way protector, and a W-way protector;
the U-path protector is connected between a U-phase live wire and a zero line N of a three-phase alternating current power supply;
the V-path protector is connected between a V-phase live wire and a zero line N of a three-phase alternating current power supply;
the W-path protector is connected between a W-phase live wire and a zero line N of a three-phase alternating current power supply;
the U-path protector, the V-path protector and the W-path protector have the same circuit structure, and respectively absorb surge current fed in by the U-phase live wire, the V-phase live wire and the W-phase live wire to prevent the surge current from entering a protection end of alternating current power supply; and a non-contact current sensor is adopted to sense surge current information fed from the U-phase live wire, the V-phase live wire and the W-phase live wire.
As shown in fig. 3, the U-path protector includes a voltage dependent resistor MOV3, a gas discharge tube GDT3, a temperature fuse TF3, and a non-contact current sensor CT 3;
the gas discharge tube GDT3 is a two-end gas discharge tube; the b end of the gas discharge tube GDT3 is connected with a neutral wire N, and the a end of the gas discharge tube GDT3 is connected with a U-phase live wire of three-phase alternating current power supply through a piezoresistor MOV3 and a temperature fuse TF3 which are connected in series;
the non-contact current sensor CT3 is sleeved on a U-phase live wire supplied with three-phase alternating current, and an induced current output end of the CT3 is connected with a degradation data collector.
The U-way protector also comprises a temperature fuse TF 4; the temperature fuse TF4 is closely attached to the temperature fuse TF 3; both ends of the temperature fuse TF4 are connected to the degradation data collector, respectively.
When a surge current is fed into a U-path live wire supplied with an alternating current, the varistor MOV3 and the gas discharge tube GDT3 are connected by facing towards the zero line N, the surge current is absorbed, and the non-contact current sensor CT3 outputs the induced current to the degradation data collector.
When surge current is too large, when the U way protector is not enough to be discharged, the thermal fuse TF3 and the thermal fuse TF4 are too high in heat and fused, the fuse of the thermal fuse TF3 protects a protection element in the U way protector, short-circuit faults are prevented, and after the fuse of the thermal fuse TF4 is collected by a degradation data collector, the U way protector is known to have faults, cannot provide protection, and needs to be replaced.
In this embodiment, only the U-path protector is taken as an example, and the structures of the V-path protector, the W-path protector and the U-path protector are the same, and are not described herein again with reference to the U-path protector.
Preferably, the second protector shown in fig. 4 further includes a gas discharge tube GDT2, and the gas discharge tube GDT2 is connected between the neutral line N and the ground line of the ac three-phase power supply.
The gas discharge tube GDT2 acts as a protection element to absorb surge current fed from the neutral line N or surge current not absorbed by the U-path, V-path and/or W-path protectors when the surge voltage is too high.
Specifically, the third protector is connected between the unprotected end and the protected end of the signal line, and a protection element including a transient suppression diode and a gas discharge tube is adopted to absorb surge current fed in from the unprotected end of the signal line and prevent the surge current from entering the protected end; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the signal wire;
the third protector is connected with the degradation data collector; and the degradation data collector collects surge current information induced by the third protector, and performs filtering, conditioning and analog-to-digital conversion to obtain current data of a protection element in the third protector, wherein the current data is used as degradation data of the protection element and is used for degradation monitoring.
As shown in fig. 5, the third protector includes a transient suppression diode TVS, a gas discharge tube GDT4, a temperature fuse TF5, a mechanical electromagnetic relay T1, and non-contact current sensors CT4 and CT 5;
the transient suppression diode TVS and the temperature fuse TF5 form a series circuit which is connected between a TX + line and a TX-line of a signal line; a coil of the mechanical electromagnetic relay T1 is connected with the transient suppression diode TVS in parallel, and two ends of a controlled switch of the mechanical electromagnetic relay T1 are connected with the degradation data collector;
the gas discharge tube GDT4 is a three-terminal gas discharge tube; an a end of the gas discharge tube GDT4 is connected to the TX + line of the signal line; the b-terminal of the gas discharge tube GDT1 is connected to the TX-line of the signal line; the ground terminal of the gas discharge tube GDT4 is grounded;
the non-contact current sensor CT4 is sleeved on a TX + line of the signal line, and an induced current output end of the CT4 is connected with the degradation data collector;
the non-contact current sensor CT5 is sleeved on a TX-wire of the signal wire, and an induced current output end of the CT5 is connected with the degradation data collector.
After surge current is fed into a TX + line and/or a TX-line of a signal line, the gas discharge tube GDT4 is connected through a grounding line, the transient suppression diode TVS absorbs the surge current in a mode of enabling the TX + line and the TX-line of the signal line to be short-circuited through conduction, and the non-contact current sensor CT4 and/or CT5 outputs the induced current to the degradation data collector; the deterioration data collector monitors the switch closing and conducting conditions of the mechanical electromagnetic relay T1, and the transient suppression diode TVS is in a surge current absorption state or a fusing state of the temperature fuse TF 5.
The third protector constitutes a two-stage protection circuit, a front stageA gas discharge tube GDT4 is used as a protection device of a discharge loop; the rear stage adopts a transient suppression diode TVS to clamp the output voltage, and an impedance device Z is adopted between two stages of protection circuitsLAn isolated two-stage protection device, typically a resistor or inductor, is used to isolate the two-stage protection device while limiting the current flowing through the secondary protection device.
Specifically, the degradation data collector correspondingly collects multiple paths of surge current information in the first protector, the second protector and/or the third protector, carries out filtering, conditioning and analog-to-digital conversion to obtain current data corresponding to the protection elements in the protectors, the current data serve as degradation data of the protection elements and are used for degradation monitoring, the degradation degree of the protection elements CAN be judged according to the magnitude and the number of times of discharging surge current and the duration of each surge, and the current data and the degradation monitoring result CAN be uploaded to an upper computer through the RS422/CAN transceiving communication assembly.
Moreover, the scheme in this embodiment is not limited to only one path of dc power supply, three-phase ac power supply, and signal lines, and the first protector, the second protector, and/or the third protector are flexibly configured according to the number of power supplies and the number of signal lines of a specific system, so as to achieve electromagnetic protection of the entire system.
In summary, the present embodiment can reduce the electromagnetic stress of the strong electromagnetic pulse acting on each device cable network, reduce the residual voltage entering the system device port, ensure the safety of the electronic device, monitor the degradation degree and the fault information of the protection element of the strong electromagnetic pulse protection device on line, and improve the reliability of the system.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A strong electromagnetic pulse protection device with degradation monitoring is characterized by comprising a first protector and a degradation data collector;
the first protector is connected between the unprotected end and the protected end of the direct current power supply, and surge current fed in from the positive pole or/and the negative pole of the unprotected end of the direct current power supply is absorbed by adopting a protection element comprising a piezoresistor and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the anode or/and the cathode;
the deterioration data collector is connected with the first protector and used for collecting surge current information induced by the first protector to obtain current data of a protection element in the first protector, and the current data is used as deterioration data of the protection element in the first protector and used for deterioration monitoring.
2. The strong electromagnetic pulse protection device of claim 1, wherein said first protector comprises a voltage dependent resistor MOV1, a voltage dependent resistor MOV2, a gas discharge tube GDT1, a temperature fuse TF1, a non-contact current sensor CT1 and a non-contact current sensor CT 2;
the gas discharge tube GDT1 is a three-end gas discharge tube; the a end of the gas discharge tube GDT1 is connected to the positive electrode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV1 and a temperature fuse TF1 which are connected in series; the b end of the gas discharge tube GDT1 is connected with the cathode of the unprotected end of the direct current power supply through a voltage dependent resistor MOV 2; the ground terminal of the gas discharge tube GDT1 is grounded;
the non-contact current sensor CT1 is sleeved on a positive power supply line of an unprotected end of a direct current power supply, and an induced current output end of the CT1 is connected with a degradation data collector;
the non-contact current sensor CT2 is sleeved on a negative power supply line of a direct current power supply unprotected end, and an induced current output end of the CT2 is connected with a degradation data collector.
3. The strong electromagnetic pulse protection device of claim 2, wherein said first protector further comprises a thermal fuse TF 2; the temperature fuse TF2 is closely attached to the temperature fuse TF 1; both ends of the temperature fuse TF2 are connected to the degradation data collector, respectively.
4. The strong electromagnetic pulse protection device of claim 1, further comprising a second protector; the second protector is connected between the unprotected end and the protected end of the three-phase alternating current power supply, and surge current fed from the unprotected end of the three-phase alternating current power supply is absorbed by adopting a protection element comprising a piezoresistor and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the three-phase alternating current power supply;
the second protector is connected with the degradation data collector; the deterioration data collector collects surge current information sensed by the second protector to obtain current data of the protection element in the second protector, and the current data is used as deterioration data of the protection element in the second protector for deterioration monitoring.
5. The strong electromagnetic pulse protection device of claim 4, wherein said second protector comprises a U-way protector, a V-way protector, and a W-way protector;
the U-path protector is connected between a U-phase live wire and a zero line N of a three-phase alternating current power supply;
the V-path protector is connected between a V-phase live wire and a zero line N of a three-phase alternating current power supply;
the W-path protector is connected between a W-phase live wire and a zero line N of a three-phase alternating current power supply;
the U-path protector, the V-path protector and the W-path protector have the same circuit structure and respectively absorb surge current fed by a U-phase live wire, a V-phase live wire and a W-phase live wire; and a non-contact current sensor is adopted to sense surge current information fed from the U-phase live wire, the V-phase live wire and the W-phase live wire.
6. The strong electromagnetic pulse protector of claim 5, wherein the U-circuit protector comprises a voltage dependent resistor (MOV) 3, a gas discharge tube (GDT 3), a temperature fuse (TF 3), and a non-contact current sensor (CT 3);
the gas discharge tube GDT3 is a two-end gas discharge tube; the b end of the gas discharge tube GDT3 is connected with a neutral wire N, and the a end of the gas discharge tube GDT3 is connected with a U-phase live wire of three-phase alternating current power supply through a piezoresistor MOV3 and a temperature fuse TF3 which are connected in series;
the non-contact current sensor CT3 is sleeved on a U-phase live wire supplied with three-phase alternating current, and an induced current output end of the CT3 is connected with a degradation data collector.
7. The strong electromagnetic pulse protection device of claim 6, wherein said U-path protector further comprises a thermal fuse TF 4; the temperature fuse TF4 is closely attached to the temperature fuse TF 3; both ends of the temperature fuse TF4 are connected to the degradation data collector, respectively.
8. The strong electromagnetic pulse protector according to any one of claims 6-7, characterized in that the second protector further comprises a gas discharge tube GDT2, the gas discharge tube GDT2 being connected between the neutral line N of the AC three-phase AC supply and the ground line.
9. The strong electromagnetic pulse protection device of claim 1, further comprising a third protector; the third protector is connected between the unprotected end and the protected end of the signal wire, and absorbs surge current fed in from the unprotected end of the signal wire by adopting a protection element comprising a transient suppression diode and a gas discharge tube; adopting a non-contact current sensor to sense surge current information fed in from the unprotected end of the signal wire;
the third protector is connected with the degradation data collector; and the degradation data collector collects the surge current information induced by the third protector to obtain the current data of the protection element in the third protector, and the current data is used as the degradation data of the protection element in the third protector for degradation monitoring.
10. A strong electromagnetic pulse protection device according to claim 9,
the third protector comprises a transient suppression diode TVS, a gas discharge tube GDT4, a temperature fuse TF5, a mechanical electromagnetic relay T1, a non-contact current sensor CT4 and a non-contact current sensor CT 5;
the transient suppression diode TVS and the temperature fuse TF5 form a series circuit which is connected between a TX + line and a TX-line of a signal line; a coil of the mechanical electromagnetic relay T1 is connected with the transient suppression diode TVS in parallel, and two ends of a controlled switch of the mechanical electromagnetic relay T1 are connected with the degradation data collector;
the gas discharge tube GDT4 is a three-terminal gas discharge tube; an a end of the gas discharge tube GDT4 is connected to the TX + line of the signal line; the b-terminal of the gas discharge tube GDT1 is connected to the TX-line of the signal line; the ground terminal of the gas discharge tube GDT4 is grounded;
the non-contact current sensor CT4 is sleeved on a TX + line of the signal line, and an induced current output end of the CT4 is connected with the degradation data collector;
the non-contact current sensor CT5 is sleeved on a TX-wire of the signal wire, and an induced current output end of the CT5 is connected with the degradation data collector.
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| CN202022984681.3U CN213585151U (en) | 2020-12-11 | 2020-12-11 | Strong electromagnetic pulse protection device with degradation monitoring function |
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| CN202022984681.3U CN213585151U (en) | 2020-12-11 | 2020-12-11 | Strong electromagnetic pulse protection device with degradation monitoring function |
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