CN204391721U - A kind of Novel electric surge protector - Google Patents
A kind of Novel electric surge protector Download PDFInfo
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- CN204391721U CN204391721U CN201420692003.1U CN201420692003U CN204391721U CN 204391721 U CN204391721 U CN 204391721U CN 201420692003 U CN201420692003 U CN 201420692003U CN 204391721 U CN204391721 U CN 204391721U
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- protective device
- overcurrent protective
- surge protector
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- lightning protection
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Abstract
The utility model relates to a kind of Novel electric surge protector, mainly comprises lightning protection component, detection module, power current inhibitor, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, sensing chip, break contact, arc-chute, arc extinguishing magnetic blow-out plate, signal sensor, signal transmssion line, overcurrent protective device detector, data cell, connecting line, splicing ear and upper and lower terminals; Lightning protection component and overcurrent protective device constitute surge and to release path; Break contact and flow plug constitute bypass.In the utility model, by electrodynamic detection, to time delay step electromagnet input phase induced current, cause a series of mechanical linkage, conducting bypass and path short circuit of surge being released, realize the protective effect to surge protector.The action situation of the action blind area of the existing thermel protection device of basic solution and overcurrent protective device and overcurrent protective device, thermel protection device and the working condition of lightning protection component unknowable, the security hidden trouble brought.
Description
Technical field
The utility model belongs to the surge protection technical field of electronic electric equipment.
Background technology
Thunder and lightning aloft to be discharged a kind of special weather phenomenon caused by charged cloud.Thunder and lightning is the major reason causing electronic equipment to damage, and it threatens a peace stable operation of the every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs.It is one of important measures of lightning protection that the metallic circuits such as the power line be connected with electronic equipment, holding wire and control line install surge protector.Surge protector has been widely used in various field, has important effect in lightning protection.The quality of its state then directly affects its lightning protection effect, thus brings hidden danger to the safety of institute's proterctive equipment.
Present stage SPD has Thermal protection and overcurrent protection (internal or external) two kinds of protective devices in use usually; thermel protection device is used for protecting lightning protection component deterioration heating; overcurrent protective device is used for the lightning protection component puncture short preventing transient over-current or overvoltage from causing; simultaneously overcurrent protection as a kind of backup protection mode of Thermal protection, so effective protective action can be played in most of occasion.
But because heat transfer is a relatively slow process, the sensitivity of thermel protection device is low, still effective protection can be played for slow temperature-rise period, but for low (in) anxious brush ramp case owing to causing under sustained over voltage condition in pressing system, Thermal protection trip gear can not this process of perception in time and action does not occur, cause lightning protection component breakdown, power current enters SPD circuit, when this power frequency electric flow valuve does not reach the initiation value of overcurrent protective device, also can not there is action in overcurrent protective device, thus cause SPD on fire; If the initiation value of overcurrent protective device is selected little, though can start, be difficult to resist the impact of lightning current, cause SPD cannot normally to release lightning current.
And; the thermel protection device of existing surge protector and the operate condition of overcurrent protective device can not be grasped in time by user; the using state of surge protector internal lighting protection element can not be known by user simultaneously; thus cause to safeguard surge protector timely or changing inner member or device, cause thunderbolt or other accidents.
In sum, there is serious action blind area in protection angle in existing SPD, in this region, and all akinesias of thermel protection device and overcurrent protective device, thus there is serious potential safety hazard; Simultaneously overcurrent protective device and the action situation of thermel protection device and the working condition of lightning protection component can not be learnt in time by user, bring serious potential safety hazard equally.
Prior art " checkout gear of device of surge protector " (patent No.: 200910069431.2) and " a kind of on-Line Monitor Device of Surge Protector " (patent No.: 200910069594.0) proposes two kinds are detected the state of device of surge protector method by measuring electrodynamic mode.Wherein " checkout gear of device of surge protector " (patent No.: 200910069431.2) propose metal spring leaf be arranged on device of surge protector side or connected by wire; pressure sensor is utilized to measure the distortion of metal spring leaf; thus learn the state of device of surge protector; this method pressure sensor is connected with nothing between metal spring leaf; measure inaccuracy; moreover the mode of texturing of metal spring leaf is single, also make the signal source of pressure sensor senses very faint." a kind of on-Line Monitor Device of Surge Protector " (patent No.: 200910069594.0) propose hardware to connect with surge suppression device, the shape of hardware is bending, when electric current is by surge suppression device and hardware, electric current makes the hardware bent become straight effect, consequent electric power passes through pressure sensor senses, and then learn the information of electric current and the degradation of surge suppression device, this method of measurement certainty of measurement is higher, but hardware is sealed in surge passage, the ability of the surge current of releasing on surge suppression device is brought very large impact, Surge Protector residual voltage is caused to raise, reduce the level of protection to its claimed equipment.And, in these two prior aries, detection for electric power physical quantity is only limitted to understand the current information flowing through device of surge protector or surge suppression device, thus understand the state of device of surge protector or surge suppression device, my problem of above-mentioned " overcurrent protective device of existing SPD and thermel protection device exist serious action blind area " is not solved, I will revise the deficiency of this electric power method of testing and innovate, thus the current capacity punishment in surge protector circuit can be judged, power current overcurrent protective device and thermel protection device being existed to action blind area carries out instant disjunction.
Utility model content
In order to effectively solve the above prior-art problems; the utility model proposes a kind of easy for installation and Novel electric surge protector for power-supply system of dependable performance; the working condition that the action blind area of the existing thermel protection device of basic solution and overcurrent protective device and overcurrent protection fill stomach, the action situation of thermel protection device and lightning protection component is unknowable, the security hidden trouble brought.
The utility model is by the following technical solutions: the utility model is for the surge protector in power electronic circuits system, and described surge protector mainly comprises lightning protection component, power current inhibitor, detection module, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, sensing chip, tripping mechanism, break contact, signal sensor, signal transmssion line, overcurrent protective device detector, data cell, connecting line, splicing ear and shell.Described lightning protection component and overcurrent protective device series connection, form surge and to release path; Described thermel protection device is positioned at lightning protection component electrode pin place; The built-in conducting metal bar of described detection module, insulating knockout pin, power inductor, constant current source and signal processing apparatus; Wherein conducting metal bar, constant current is source-series, forms measure loop; The output of described signal processing apparatus connects the input of time delay step electromagnet; The other end of described time delay step electromagnet acts on sensing chip; Described break contact comprises moving contact and fixed contact; Described sensing chip is connected by trip gear with moving contact; Fixed contact and flow restricter are in parallel with lightning protection component after connecting; Described signal sensor be installed on lightning protection component electrode surface or near, or be installed on surge and release near path, be connected with data cell by signal transmssion line; Described overcurrent protective device detector is parallel to overcurrent protective device two ends, is connected with data cell through signal transmssion line; Described data cell is connected with splicing ear by connecting line.
In the utility model, due to difference in actual applications, power inductor and signal processing apparatus can be arranged respectively, also can be integrated in some devices.
The utility model is attracted each other by the identical meeting of the two parallel electrified wire senses of current, the sense of current can repel this characteristic on the contrary mutually, conducting metal bar in described detection module can be subject to convergence or the power of path of releasing away from surge, what the reception of power inductor was conducted by insulating knockout pin is subject to force information and is translated into current information, and this information is transferred to time delay step electromagnet after signal processing means processes, amplification, described time delay step electromagnet can according to lightning current and power current flow through surge release path time, the difference of being released on signal processing apparatus output current that path causes the difference of conducting metal bar active force by surge is as the foundation of disjunction SPD path, realize a kind of parametrization to control, power current is the periodic wave of Millisecond, the active force duration is longer, the function of current time that signal processing apparatus exports is also longer, time delay step electromagnet can through pulse number stepping, quick-action after Millisecond time delay, promote tablet, drive tripping mechanism, closed break contact, conducting bypass, disjunction SPD path, play a protective role, lightning current is fast-changing Microsecond grade pulse, the active force duration is shorter, the function of current time that signal processing apparatus exports is also shorter, time delay step electromagnet can not complete pulse number stepping, enter delay stage, lightning current flows through, so tripping mechanism is failure to actuate, ensure that lightning current is released smoothly, the utility model is by reset switch hand-reset simultaneously, described arc-chute and arc extinguishing magnetic blow-out plate are for eliminating the electric arc produced when moving contact contacts with fixed contact.
Described signal sensor can be installed on lightning protection component electrode surface or near, the detection temperature of lightning protection component, magnetic field, the signal such as infrared; Also can be installed on surge releases near path, and detection surge is released the signals such as the temperature of path, magnetic field, infrared, electric power; Signal sensor can also detect the action situation of thermel protection device.Described overcurrent protective device detector can detect the state of overcurrent protective device, and exports to data cell through signal transmssion line.Described data cell built-in power, or obtain power supply by connecting line from splicing ear outside.
The working method of this Novel electric surge protector: when surge current flows through, what sensed by power inductor is converted to telecommunications after treatment and ceases by force information and transfer to time delay step electromagnet, but lightning current is fast-changing Microsecond grade pulse, time delay step electromagnet can not complete pulse number stepping, electromagnetism actuating mechanism is failure to actuate, and SPD normally releases surge current; Now signal sensor can detect that lightning protection component itself or surge are released the change of the signals such as temperature on path, magnetic field, infrared, electric power, thus analyze the information such as lightning current size, waveform, the record thunderbolt time, this type of information is sent to data cell through data line, data cell is connected with external equipment by connecting line, splicing ear, and described external equipment can be data acquisition equipment, the network switching equipment, watch-dog etc.; When lightning protection component deterioration, when power frequency leakage current flows through lightning protection component, be installed on lightning protection component electrode tip thermel protection device heating melt, make surge release path disconnect, avoid surge protector breaking out of fire; Now signal sensor can detect thermel protection device action; this signal can be sent to data cell through data line; data cell is connected with external equipment by connecting line, splicing ear, and described external equipment can be data acquisition equipment, the network switching equipment, watch-dog etc.When power system failure, power current flow through, lightning protection component inefficacy short circuit time, power current inhibitor in protective device can play inhibitory action to the electric current now flow through, cause and can slowly be risen by the power frequency electric flow valuve of lightning protection component, extend the time of SPD breaking out of fire accident; Now power current is the periodic wave of Millisecond; the quick-action after pulse number stepping, Millisecond time delay of time delay step electromagnet; promote tablet; drive tripping mechanism; closed break contact, conducting bypass, directly introduces overcurrent protective device by power current; thus cut off SPD path, surge path of releasing is played a protective role.Now overcurrent protective device detector will detect that overcurrent protective device disconnects, this signal can be sent to data cell through data line, and data cell sends signal by connecting line to splicing ear external equipment.Described external equipment can be data acquisition equipment, the network switching equipment, watch-dog etc.
In above three processes, signal sensor signals such as temperature on path, magnetic field, infrared, electric power of all lightning protection component detected or surge being released send to data cell through data line, data cell sends signal by connecting line to splicing ear external equipment, to learn the using state of lightning protection component, life-span, event record.Described external equipment can be data acquisition equipment, the network switching equipment, watch-dog etc.
Of the present utility modelly to be characterised in that:
1. this Novel electric surge protector solves the action blind zone problem of thermel protection device and overcurrent protective device, and bypass is composed in series by break contact, flow restricter; Described moving contact is controlled by tripping mechanism, and tripping mechanism controls by time delay step electromagnet, and the current source on time delay step electromagnet is in detection module.
2. the lightning protection component of this Novel electric surge protector, detection module, overcurrent protection part device, power current inhibitor, thermel protection device, flow restricter, time delay step electromagnet, break contact, tripping mechanism, signal sensor, signal transmssion line, overcurrent protective device detector, data cell, connecting line, splicing ear accessible site is in one, be loaded on housing, meet power consumption equipment to surge protector discharge capacity, the requirement of response time and voltage protection level three indexs, enhance the reliability of equipment, also can be encapsulated in different modules and combine, be convenient to install and use,
3. this Novel electric surge protector can not have overcurrent protective device.
4. the power inductor in detection module and signal processing apparatus both can be arranged respectively, and also can be integrated in single device according to actual conditions, scheme is flexible.
5. the splicing ear of this Novel electric surge protector can be connected with external equipment, and the signal that signal sensor and overcurrent protective device detector detect is sent to external equipment, makes monitor staff grasp the various states of surge protector.Described external equipment can be data acquisition equipment, the network switching equipment, watch-dog etc.Described data acquisition equipment can gather the information of multiple surge protector, and the described network switching equipment can connect multiple data acquisition equipment.
6. the detection module of this Novel electric surge protector is installed on surge and releases path side, isolates, not affecting surge and normally release, not affecting surge protector on needing the level of protection of proterctive equipment with surge path of releasing; The built-in conducting metal bar of described detection module, insulating knockout pin, power inductor, constant current source and signal processing apparatus, power inductor directly measures the electric power on measure loop by insulating knockout pin, certainty of measurement is high, and measurement result is accurate.In addition, can select the electric current that surge is released on path, power current overcurrent protective device and thermel protection device being existed to action blind area carries out instant disjunction.
Accompanying drawing explanation
Fig. 1 is the first example structure of the present utility model
Fig. 2 is detection module internal structure schematic diagram
Fig. 3 is the schematic diagram of the first embodiment of the present utility model
Fig. 4 is the schematic diagram of the second embodiment of the present utility model
Fig. 5 is the schematic diagram of the 3rd embodiment of the present utility model
Fig. 6 is the utility model protected effect schematic diagram
Fig. 7 is the utility model workflow diagram ideally
Fig. 8 is the utility model group network system first embodiment schematic diagram.
Fig. 9 is the utility model group network system second embodiment schematic diagram
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated:
As shown in the figure, 1 is upper terminals, 2 is break contacts, 3 is tripping mechanisms, 4 is reset switches, 5 is tablets, 6 is detection modules, 6-1 is conducting metal bar, 6-2 is measure loop, 6-3 is constant current source, 6-4 is insulating knockout pin, 6-5 power inductor, 6-6 is signal processing apparatus, 6-7 is signal output part, 7 is power current inhibitor, 8 is lower terminals, 9 is shells, 10 is lightning protection components, 11 is time delay step electromagnets, 12 is arc-chutes, 13 is arc extinguishing magnetic blow-out plates, 14 is flow restricters, 15 is overcurrent protective devices, 16 is thermel protection devices, 17 is bypass, 18 is moving contacts, l9 is fixed contact, 20 is signal sensors, 21 is signal transmssion lines 1, 22 is overcurrent protective device detectors, 23 is signal transmssion lines 2, 24 is data cells, 25 is connecting lines, 26 is splicing ears, 27 is this Novel electric surge protectors, 28 is data acquisition equipments, 29 is watch-dogs, 30 is connecting lines 1, 31 is data wires, 32 is network switching equipment.。
Fig. 1 is the structural representation of the utility model first embodiment, and described upper terminals (1), power current inhibitor (7), lightning protection component (10), overcurrent protective device (15), thermel protection device (16), lower terminals (8) are connected in series.
Described power current inhibitor (7), is series between upper and lower terminals, has inhibitory action to the power current flow through, and can race against time for lightning protection component fault is on fire below.
Described thermel protection device (16) is positioned at lightning protection component electrode pin place, and when there being less power current to flow through lightning protection component, thermel protection device action, disconnects surge and to release path, protection lightning protection component.
Described lightning protection component (10), comprises piezo-resistance, discharge tube, TVS one or a combination set of;
Described detection module (6) is arranged on surge and releases path side, and is connected with time delay step electromagnet (11); Described detection module (6) built-in power;
Described tablet (5) is connected by tripping mechanism (3) with moving contact (18), and described fixed contact (19) is connected with flow restricter (14) and in parallel with lightning protection component (10).
Described reset switch (4) closes when moving contact (18) and fixed contact (19), namely surge releases path when being shorted, reset manually by reset switch (4), make surge path recovery of releasing through-flow, thus make unspoiled SPD again take back circuit.
Described arc-chute (12) and arc extinguishing magnetic blow-out plate (13) form the arc-control device of this Novel electric surge protector, for eliminating the electric arc produced when moving contact and fixed contact close.
The circuit that described flow restricter (14) can be one of electronic devices such as resistance, inductance, electric capacity or be combined by it.
Described overcurrent protective device (15) can be fuse or circuit breaker, and when the electric current flowing through lightning protection component is larger power current, this device effect, disconnects surge and to release path, protection lightning protection component.
Described signal sensor (20) is installed on lightning protection component (10) surface, the temperature of detection lightning protection component (10), magnetic field, the signal such as infrared, signal sensor (20) also detects the action situation of thermel protection device (16) simultaneously, and exports to data cell (24) through signal transmssion line 1 (21); Described overcurrent protective device detector (22) is connected in parallel on overcurrent protective device (15) two ends, the state of detection overcurrent protective device (15), and export to data cell (24) through signal transmssion line 2 (23); Described data cell (24) built-in power, also can pass through connecting line (25) and obtain power supply from splicing ear (26) outside.
Fig. 2 is the internal structure schematic diagram of force detector of the present utility model, and measure loop (6-2) provides electric energy by constant current source (6-3), has lasting, stable single direction electric current in measure loop; One end of insulating knockout pin (6-4) is connected with measure loop (6-2), and the other end is connected with power inductor (6-5), and the output of power inductor (6-5) is connected with signal processing apparatus (6-6); Described conducting metal bar (6-1) and surge are released the parallel placement of path.Power inductor (6-5) is measured the upper different electric power produced of measure loop (6-2) by insulating knockout pin (6-4), and then be converted into different current signals and export to signal processing apparatus (6-6), by process and the amplification of signal processing apparatus (6-6), from signal output part (6-7), current signal is inputed to time delay step electromagnet (11), make time delay step electromagnet (11) produce different actions.
Fig. 3 is the schematic diagram of the first embodiment, namely when power current flows through lightning protection component (10), detection module (6) records and is subject to force information accordingly and is translated into current information, again corresponding current information is transferred to time delay step electromagnet (11), trigger the mechanical linkage of tripping mechanism (3), closed break contact (2), conducting bypass (17), realizes surge and releases path from the disengaging operating circuit.
Fig. 4 is the schematic diagram of the utility model second embodiment, overcurrent protective device (15) is not had in the surge protector of this embodiment, only comprise surge to release path, bypass (17) and detection module (6), power current inhibitor (7), time delay step electromagnet (11), tablet (5), tripping mechanism (3), signal sensor (20), signal transmssion line 1 (21), overcurrent protective device detector (22), signal transmssion line 2 (23), data cell (24), connecting line (25), splicing ear (26).This second embodiment gives the fundamental diagram of the surge protector in the utility model in such cases.Because surge protector in use; if inside does not have built-in overcurrent protective device; so rear end must be connected in series overcurrent protective device; therefore the Novel electric surge protector that describes of the present embodiment have power current by time can allow the timely action of its external overcurrent protective device, thus surge protector is departed from main circuit.
Fig. 5 is the schematic diagram of the 3rd embodiment of the present utility model; in the practical application of surge protector; the situation that described lightning protection component (10) and detection module (6), power current inhibitor (7), overcurrent protective device (15), thermel protection device (16), flow restricter (14), time delay step electromagnet (11), tripping mechanism (3), break contact (2) are installed on different housings may be there is; only list wherein a kind of fundamental diagram at this, the program is also applicable to other distortion in the case simultaneously.
Fig. 1, Fig. 2 are the embodiment that each element concentrates on one, and Fig. 3, Fig. 4 then illustrate each element and also can be installed on different housings or be encapsulated in the embodiment combined in disparate modules.
Fig. 6 is the utility model protected effect schematic diagram, power frequency short circuit current is divided into three parts: little power current refers to the current range that thermel protection device can start; Large power frequency short circuit current refers to the current range that overcurrent protective device can start; Marginal, be the power frequency short circuit current action blind area of existing surge protector protective device, be called for short action blind area.
The utility model is for the surge protector in power electronic circuits system and protective device thereof, and this problem of action blind area can be overcome, workflow ideally as shown in Figure 7, namely by the protection of protective device realization to surge protector internal environment that be core with detection module (6) and step electromagnet (11), described protective device mainly comprises break contact (2), tripping mechanism (3), reset switch (4), tablet (5), detection module (6), power current inhibitor (7), time delay step electromagnet (11), arc-chute (12), arc extinguishing magnetic blow-out plate (13), upper terminals (1), lower terminals (8), overcurrent protective device (15) and thermel protection device (16).
Fig. 8 is the utility model group network system first embodiment schematic diagram; in figure, connecting line 1 (30) is connected with data acquisition equipment (28) after being linked together by several this Novel electric surge protectors (17), and data acquisition equipment (28) is connected with watch-dog (29) by data wire (31).Described connecting line 1 (30) accesses the splicing ear (26) of this Novel electric surge protector (27), and described data acquisition equipment (28) internally data cell (24) can provide power supply.Described connecting line 1 (30) can be 485 buses or CAN or other line styles.Described data wire (31) can be netting twine, optical fiber or other line styles.
Fig. 9 is the utility model group network system second embodiment schematic diagram; in figure, the network switching equipment (32) can gather the data of multiple data acquisition equipment (28); be transferred to watch-dog (29) simultaneously, form the intelligent monitoring network of surge protector (27).
Utilize the technical solution of the utility model, reach corresponding technique effect, or not departing from the technical scheme equivalents under design philosophy of the present utility model, all within protection range of the present utility model.
Claims (13)
1. a Novel electric surge protector, comprise lightning protection component, overcurrent protective device, thermel protection device and shell, described lightning protection component and overcurrent protective device series connection, form surge to release path, described thermel protection device is positioned on lightning protection component electrode, it is characterized in that: this Novel electric surge protector also comprises power current inhibitor, detection module, time delay step electromagnet, sensing chip, break contact, flow restricter, tripping mechanism, signal sensor, signal transmssion line, overcurrent protective device detector, data cell, connecting line, splicing ear; Described power current inhibitor is connected on surge and releases on path; Described detection module comprises constant current source, conducting metal bar, insulating knockout pin, power inductor and signal processing apparatus; The output of described signal processing apparatus is connected with time delay step electromagnet input; Described time delay step electromagnet controls sensing chip action; Described break contact comprises moving contact and fixed contact; Described sensing chip is connected by tripping mechanism with moving contact; Described fixed contact and flow restricter series connection and in parallel with lightning protection component; Described signal sensor is connected with data cell by signal transmssion line; Described overcurrent protective device detector is parallel to overcurrent protective device two ends, is connected with data cell through signal transmssion line; Described data cell is connected with splicing ear by connecting line.
2. a kind of Novel electric surge protector according to claim 1, is characterized in that: this Novel electric surge protector can not have overcurrent protective device.
3. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: after described moving contact and fixed contact close, can not open before overcurrent protective device disconnects again.
4. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described break contact has reset switch.
5. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: time delay step electromagnet adopts the time difference of lightning current and power current to control, as the foundation of disjunction SPD path to realize parametrization.
6. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described time delay step electromagnet controls moving contact action by mechanical linkage.
7. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: described lightning protection component and detection module, overcurrent protective device, thermel protection device, power current inhibitor, flow restricter, time delay step electromagnet, electromagnetism actuating mechanism, break contact, tripping mechanism, signal sensor, signal transmssion line, overcurrent protective device detector, data cell, connecting line, splicing ear can be positioned at same housing, also can be installed on different housings or be encapsulated in different modules and combine.
8. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: the circuit that described flow restricter can be one of resistance, inductance, electric capacity or be combined by it.
9. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described overcurrent protective device can be fuse or circuit breaker.
10. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described lightning protection component can be piezo-resistance, discharge tube, TVS one or a combination set of.
11. a kind of Novel electric surge protectors according to claim 1 and 2, is characterized in that: described power inductor and signal processing apparatus can be arranged respectively, also can be integrated in single device.
12. a kind of Novel electric surge protectors according to claim 1 and 2, is characterized in that: described signal sensor be installed on lightning protection component electrode surface or near, or be installed on surge and release near path.
13. a kind of Novel electric surge protectors according to claim 1 and 2, is characterized in that: described data cell is connected with external equipment by connecting line, splicing ear, and described external equipment can be data acquisition equipment, the network switching equipment, watch-dog.
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| CN201420692003.1U CN204391721U (en) | 2014-11-08 | 2014-11-08 | A kind of Novel electric surge protector |
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| CN201420692003.1U CN204391721U (en) | 2014-11-08 | 2014-11-08 | A kind of Novel electric surge protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026060A (en) * | 2014-11-08 | 2016-10-12 | 孙麓轩 | Novel surge protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026060A (en) * | 2014-11-08 | 2016-10-12 | 孙麓轩 | Novel surge protector |
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