CN204391707U - A kind of Novel electric surge protector - Google Patents
A kind of Novel electric surge protector Download PDFInfo
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- CN204391707U CN204391707U CN201420691674.6U CN201420691674U CN204391707U CN 204391707 U CN204391707 U CN 204391707U CN 201420691674 U CN201420691674 U CN 201420691674U CN 204391707 U CN204391707 U CN 204391707U
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- magnetic field
- judgment means
- surge protector
- novel electric
- normally opened
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Abstract
The utility model relates to a kind of Novel electric surge protector, mainly comprises lightning protection component, magnetic field induction device, overcurrent protective device, thermel protection device, flow restricter, judgment means, actuating mechanism, normally opened contact and shell.Described lightning protection component and overcurrent protective device surge in series are released path; Described thermel protection device is positioned on lightning protection component electrode; Described magnetic field induction device is arranged on surge and releases around path, and is connected with judgment means input; Described judgment means output is connected with actuating mechanism; Described actuating mechanism controls normally opened contact action; It is in parallel with lightning protection component that described normally opened contact and flow restricter are composed in series bypass.In the utility model, magnetic field induction device can sense the magnetic field flow through electric current that surge releases path and produce; judgment means can judge the type in this magnetic field accordingly; and the state of normally opened contact is changed by control action mechanism, there is the problem of action blind area to power current in the protective device efficiently solving existing surge protector.
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 the safe and 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, and for low (in) steep temperature rise situation 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.
In sum; there is serious action blind area in the overcurrent protective device of existing SPD and thermel protection device; SPD is by when the electric current in this region, and the SPD that thermel protection device and overcurrent protective device all can not be about to damage departs from main circuit, thus occurs serious potential safety hazard.
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, there is the problem of action blind area in the protective device efficiently solving existing surge protector to power current.
The utility model is by the following technical solutions: the utility model is for the surge protector in power electronic circuits system, comprises lightning protection component, overcurrent protective device, thermel protection device and shell; Described lightning protection component and overcurrent protective device series connection, form surge and to release path, described thermel protection device is positioned on lightning protection component electrode.The utility model also comprises magnetic field induction device, flow restricter, judgment means, actuating mechanism, normally opened contact; Described magnetic field induction device is arranged on surge and releases around path, and is connected with judgment means input; Described judgment means output is connected with actuating mechanism; Described actuating mechanism controls normally opened contact action; Described normally opened contact and flow restricter are composed in series bypass and in parallel with lightning protection component.
The built-in power of judgment means described in the utility model and data processing unit; Described actuating mechanism controls normally opened contact action by mechanical linkage or electromagnetic mode; After described normally opened contact is closed, can not open again before overcurrent protective device disconnects; Described normally opened contact has reset switch; The circuit that described flow restricter can be one of electronic devices such as resistance, inductance, electric capacity or be combined by it; Described overcurrent protective device can be fuse or circuit breaker; Described lightning protection component, comprises piezo-resistance, discharge tube, TVS one or a combination set of.
Core mechanism of the present utility model is magnetic field induction device and judgment means, described magnetic field induction device can sense the magnetic field that the electric current flowing through surge leadage circuit produces, the field signal sensed is transferred to the data processing unit in judgment means by magnetic field induction device by the input of judgment means, data processing unit processes the field signal received, analyze, according to the size in magnetic field, direction, rate of change, the physical quantitys such as duration judge the type in magnetic field, because surge current, little power current, power current within the scope of action blind area, the magnetic field that the power current being greater than action blind area produces is different, therefore the type in magnetic field can be judged, or the field signal sensed is transferred to the data analysis unit in judgment means by magnetic field induction device by the input of judgment means, field signal can be converted to current signal and analyze the physical quantity such as size, direction, rate of change, duration of this electric current by described data processing unit, thus can judge the type of the electric current flowing through surge leadage circuit.Judged result is divided into following several situation: if the magnetic field (or for less power current) that judged result is less power current to be produced, then actuating mechanism is failure to actuate, normally opened contact do not close, and is protected by thermel protection device; The magnetic field that if judged result is the power current in action blind area to be produced (or being the power current in action blind area), then actuating mechanism action, normally opened contact close, by-path turn-on, the bypass be composed in series by described normally opened contact and flow restricter causes overcurrent protective device and protects; If judged result is the magnetic field (or for being greater than the power current of action blind area) that the power current being greater than action blind area produces, then actuating mechanism is failure to actuate, normally opened contact do not close, and is directly protected by overcurrent protective device; If the magnetic field (or for surge current) that judged result is surge current to be produced, then normally released by surge path of releasing.
Of the present utility modelly to be characterised in that:
1. this Novel electric surge protector adds the bypass being connected in parallel on lightning protection component two ends, solves the action blind zone problem of thermel protection device and overcurrent protective device;
2. the lightning protection component of this Novel electric surge protector, magnetic field induction device, overcurrent protective device, thermel protection device, flow restricter, judgment means, actuating mechanism, normally opened contact accessible site are in one, be loaded on housing, meet the requirement of power consumption equipment to surge protector discharge capacity, response time and voltage protection level three indexs, enhance the reliability of equipment, also can be contained in different modules to combine and jointly form the utility model, be convenient to install and use;
3. the actuating mechanism in this Novel electric surge protector is according to the judged result action of judgment means or be failure to actuate, and actuating mechanism institute energy requirement can be supplied by judgment means, and also configurable independent power supply, also can be supplied by power line;
4. the utility model can not have overcurrent protective device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the first embodiment principle schematic of the present utility model.
Fig. 3 is the second embodiment principle schematic of the present utility model.
Fig. 4 is the 3rd embodiment principle schematic of the present utility model.
Fig. 5 is the utility model protected effect schematic diagram.
Specific embodiments
Below in conjunction with drawings and Examples, the utility model is further illustrated:
As shown in the figure, 1 is that surge is released path, and 2 is magnetic field induction devices; 3 is lightning protection components, and 4 is overcurrent protective devices, and 5 is data processing units; 6 is judgment means, and 7 is actuating mechanisms, and 8 is normally opened contacts; 9 is flow restricters, and 10 is thermel protection devices, and 11 is shells; 11 ' is another shell, and 12 is bypasses, and 13 is reset switches; aa ' is the input of judgment means, and bb ' is the output of judgment means.
Fig. 1 is this Novel electric surge protector first embodiment, this Novel electric surge protector has overcurrent protective device (4) in this embodiment, and described lightning protection component (3) and overcurrent protective device (4) surge in series are released path (1); Described magnetic field induction device (2) is arranged on surge and releases path (1) around, and is connected with judgment means (6) input (aa '); Described judgment means (6) output (bb ') be connected with actuating mechanism (7); Described thermel protection device (10) is positioned on lightning protection component (3) electrode; It is in parallel with lightning protection component (3) that described normally opened contact (8) and flow restricter (9) form bypass (12).
When having electric current to flow through on path (1) is released in surge, magnetic field induction device (2) can sense the magnetic field that this electric current produces, and this field signal is transferred to the built-in data processing unit (5) of judgment means (6) (data processing unit (5) does not draw in FIG) by the input of judgment means (6) (aa '), data processing unit (5) or the size according to magnetic field, direction, rate of change, the physical quantitys such as duration judge the type (surge current in magnetic field, little power current, power current in action blind area, the magnetic field that the power current being greater than action blind area produces is different), or judge according to physical quantitys such as the size of this electric current, direction, rate of change, duration the type flowing through the electric current of surge leadage circuit after field signal is converted to current signal.If the magnetic field (or for less power current) that judged result is less power current to be produced, then actuating mechanism (7) is failure to actuate, normally opened contact (8) do not close, and is protected by thermel protection device (10); The magnetic field that if judged result is the power current in action blind area to be produced (or being the power current in action blind area), then actuating mechanism (7) action, normally opened contact (8) close, bypass (12) conducting that described normally opened contact (8) and flow restricter (9) are composed in series, cause overcurrent protective device (4) by described bypass (12) to protect, after described normally opened contact (8) is closed, can not open again before overcurrent protective device (4) disconnects; If judged result is the magnetic field (or for being greater than the power current of action blind area) that the power current being greater than action blind area produces, then actuating mechanism (7) is failure to actuate, normally opened contact (8) do not close, and is directly protected by overcurrent protective device (4); If the magnetic field (or for surge current) that judged result is surge current to be produced, then normally released by lightning protection component (3) and overcurrent protective device (4) surge in series path (1) of releasing.
Described normally opened contact has reset switch (illustrating not shown in FIG.); Described actuating mechanism controls normally opened contact action (actuating mechanism described in embodiment illustrated in fig. 1 (7) controls normally opened contact action by electromagnetism for mode processed, and mechanical linkage control mode is not repeated herein) by mechanical linkage or electromagnetic mode.
Described lightning protection component can be electronic devices such as piezo-resistance, discharge tube, TVS one or a combination set of; The circuit that described flow restricter can be one of electronic devices such as resistance, inductance, electric capacity or be combined by it; Described overcurrent protective device can be fuse or circuit breaker.
Fig. 2 is the principle schematic that Fig. 1 (the first embodiment) is corresponding, depict reset switch (13) and the built-in data processing unit (5) of judgment means (6) in figure, described reset switch (13) can make normally opened contact recover normally open; Described data processing unit can field signal be converted to current signal function, magnetic field processed, analyze, also can there is this function, the electric current of conversion is processed, analyzes that (data processing unit in following examples is all identical with the data processing unit in the present embodiment, repeat no more), aa ' is the input of judgment means, and bb ' is the output of judgment means.
Fig. 3 is this Novel electric surge protector second embodiment principle schematic; overcurrent protective device (4) is not had in the surge protector of this embodiment; only comprise surge to release path (1), magnetic field induction device (2), lightning protection component (3), judgment means (6), actuating mechanism (7), normally opened contact (8), flow restricter (9), thermel protection device (10), reset switch (13); wherein aa ' is the input of judgment means, and bb ' is the output of judgment means.Because surge protector in use; if there is no 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 and surge protector is departed from main circuit.
In embodiment shown in Fig. 4, the component content of this Novel electric surge protector is arranged in different housings and jointly forms the utility model.Wherein, magnetic field induction device (2) and overcurrent protective device (4) are placed in same housing; lightning protection component (3), judgment means (6), actuating mechanism (7), normally opened contact (8), flow restricter (9), thermel protection device (10), reset switch (13) are placed in same housing; wherein aa ' is the input of judgment means, and bb ' is the output of judgment means.
Fig. 1, in embodiment illustrated in fig. 2, the lightning protection component (3) of this Novel electric surge protector, magnetic field induction device (2), overcurrent protective device (4), thermel protection device (10), flow restricter (9), judgment means (6), actuating mechanism (7), normally opened contact (8), reset switch (13) is integrated in one, be loaded on a 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, Fig. 3, the composition of middle Novel electric surge protector embodiment illustrated in fig. 4 is encapsulated in different modules to combine and jointly forms the utility model, be convenient to install and use, enhance practicality.
Fig. 5 is the utility model protected effect schematic diagram.Power frequency short circuit current can be divided into three parts: little power frequency short circuit 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; And marginal, be also the action blind area of power frequency short circuit current of existing surge protector protective device, be called for short action blind area.
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 (11)
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 magnetic field induction device, flow restricter, judgment means, actuating mechanism, normally opened contact; Described magnetic field induction device is arranged on surge and releases around path, and is connected with judgment means input; Described judgment means output is connected with actuating mechanism; Described actuating mechanism controls normally opened contact action; Described normally opened contact and flow restricter are composed in series bypass and in parallel with lightning protection component.
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 normally opened contact is closed, 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 normally opened contact has reset switch.
5. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: be provided with power supply in described judgment means and can analyze the size in magnetic field, direction, rate of change, the data processing unit of duration, described data processing unit is connected with magnetic field induction device through judgment means input.
6. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: be provided with power supply in described judgment means and field signal can be converted to current signal and analyze the size of this electric current, direction, rate of change, the data processing unit of duration, described data processing unit is connected with magnetic field induction device through judgment means input.
7. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described actuating mechanism controls normally opened contact action by mechanical linkage or electromagnetic mode.
8. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: described lightning protection component, magnetic field induction device, overcurrent protective device, thermel protection device, flow restricter, judgment means, actuating mechanism, normally opened contact can be positioned at same housing, also can be installed on different housings or be encapsulated in different modules and combine.
9. 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.
10. 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.
11. a kind of Novel electric surge protectors 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691674.6U CN204391707U (en) | 2014-11-08 | 2014-11-08 | A kind of Novel electric surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691674.6U CN204391707U (en) | 2014-11-08 | 2014-11-08 | A kind of Novel electric surge protector |
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| Publication Number | Publication Date |
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| CN204391707U true CN204391707U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420691674.6U Active CN204391707U (en) | 2014-11-08 | 2014-11-08 | A kind of Novel electric surge protector |
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| CN (1) | CN204391707U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656000A (en) * | 2014-11-08 | 2016-06-08 | 孙麓轩 | Novel surge protector |
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2014
- 2014-11-08 CN CN201420691674.6U patent/CN204391707U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656000A (en) * | 2014-11-08 | 2016-06-08 | 孙麓轩 | Novel surge protector |
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| GR01 | Patent grant |