CN105576636A - Novel surge protection device - Google Patents
Novel surge protection device Download PDFInfo
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- CN105576636A CN105576636A CN201410660163.2A CN201410660163A CN105576636A CN 105576636 A CN105576636 A CN 105576636A CN 201410660163 A CN201410660163 A CN 201410660163A CN 105576636 A CN105576636 A CN 105576636A
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- surge protector
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- lightning protection
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Abstract
The invention relates to a novel surge protection device which mainly comprises a lightning protection element, a current sensor, an overcurrent protection device, a thermal protection device, a current limiter, a time-delay stepping electromagnet, an induction sheet, a separating contact, an arc-extinguishing gate, an arc-extinguishing magnetic blowout plate and upper and lower connecting terminals. The thermal protection device is arranged on the electrode of the lightning protection element. The lightning protection element is connected in series with the overcurrent protection device so as to form a surge discharge path. The current sensor sleeves the surge discharge path and is connected with the time-delay stepping electromagnet. The current sensor can sense current flowing through the lightning protection element and current is led into the time-delay stepping electromagnet. Power frequency current is introduced into the time-delay stepping electromagnet and then a series of mechanical linkage movement is actuated. The bypass circuit is conducted and the surge discharge path is shorted so that the protection effect of the surge protection device is realized.
Description
Technical field
The invention 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; but 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.
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.
Summary of the invention
In order to effectively solve the above prior-art problems, the present invention proposes a kind of easy for installation and Novel electric surge protector for power-supply system of dependable performance, the basic action blind zone problem solving existing thermel protection device and overcurrent protective device.
The present invention is by the following technical solutions: the present invention is for the surge protector in power electronic circuits system, and described surge protector mainly comprises lightning protection component, power current inhibitor, current sensor, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, sensing chip, tripping mechanism, break contact 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; Described current sensor is sleeved on surge and releases on path or be installed on surge and release near path, is connected with 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.
Current sensor in the present invention can sense the electric current flowing through lightning protection component, current sensor by the current delivery that senses to time delay step electromagnet, the time difference of the signal that described time delay step electromagnet can export respectively according to current sensor induced lightening electric current and power current, realize a kind of parametrization to control, as the foundation of disjunction SPD path.Power current is the periodic wave of Millisecond, and time delay step electromagnet can through pulse number stepping, quick-action after Millisecond time delay, and promote tablet, drive tripping mechanism, disjunction SPD path, plays a protective role; Lightning current is fast-changing Microsecond grade pulse, and time delay step electromagnet can not complete pulse number stepping, enter delay stage, and lightning current flows through, so tripping mechanism is failure to actuate, ensures that lightning current is released smoothly.
Described moving contact is connected with tablet by tripping mechanism, and power current inhibitor is connected with lightning protection component, is finally connected with lower terminals; Current sensor output is connected to time delay step electromagnet, and the motion of time delay step electromagnet iron core can promote tablet, thus drives whole tripping mechanism that moving contact is contacted with fixed contact; Simultaneously by reset switch hand-reset; Arc-chute is lonely for eliminating the electricity produced when moving contact contacts with fixed contact with arc extinguishing magnetic blow-out plate.
The working method of Novel electric surge protector: when surge current flows through, by current sensor sense Signal transmissions to time delay step electromagnet, but the time difference of the signal that time delay step electromagnet can export respectively according to induced lightening electric current and power current, realize parametrization to control, electromagnetism actuating mechanism is failure to actuate, and SPD normally releases surge current; 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; 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; Time delay step electromagnet quick-action after pulse number stepping, Millisecond time delay simultaneously, promotes tablet, drives 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.
The invention is characterized in:
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 the current sensor being sleeved on surge and releasing on path.
2. the lightning protection component of this Novel electric surge protector, current sensor, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, electromagnetism actuating mechanism, break contact, tripping mechanism 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 encapsulated in different modules and combine, be convenient to install and use;
3. this Novel electric surge protector can not have overcurrent protective device.
Accompanying drawing explanation
Fig. 1 is first embodiment of the present invention structure
Fig. 2 is the schematic diagram of the first embodiment of the present invention
Fig. 3 is the schematic diagram of the second embodiment of the present invention
Fig. 4 is the schematic diagram of the third embodiment of the present invention
Fig. 5 is protected effect schematic diagram of the present invention
Fig. 6 be the present invention ideally workflow diagram
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
As shown in the figure, 1 is upper terminals, and 2 is break contacts, and 3 is tripping mechanisms; 4 is reset switches, and 5 is tablets, and 6 is current sensors, and 7 is power current inhibitor; 8 is lower terminals, and 9 is shells, and 10 is lightning protection components; 11 is time delay step electromagnets, and 12 is arc-chutes, and 13 is arc extinguishing magnetic blow-out plates; 14 is flow restricters, and 15 is overcurrent protective devices, and 16 is thermel protection devices; 17 is bypass, and 18 is moving contacts, and 19 is fixed contacts.
Fig. 1 is the structural representation of first embodiment of the invention, 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;
The electric current that described current sensor (6) can flow through in induction line, and current signal is exported to time delay step electromagnet (11).
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.
Fig. 2 is the schematic diagram of the first embodiment, namely when current sensor (6) record power current flow through lightning protection component time, trigger the mechanical linkage of tripping mechanism, closed break contact (3), conducting bypass (17), realizes surge and releases path from the disengaging operating circuit.
Fig. 3 is the schematic diagram of second embodiment of the invention; there is no overcurrent protective device (15) in the surge protector of this embodiment, only comprise surge and to release path, bypass (17) and current sensor (6), time delay step electromagnet (11), tablet (5), tripping mechanism (3).This second embodiment gives the fundamental diagram of the surge protector in the present invention 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. 4 is the schematic diagram of the third embodiment of the present invention; in the practical application of surge protector; the situation that described lightning protection component (10) and current sensor (6), 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. 5 is protected effect schematic diagram of the present invention, 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 present invention 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 6, namely the protection to surge protector internal environment is realized by the protective device that is core with current sensor and step electromagnet, described protective device mainly comprises break contact (fixed contact and moving contact), tripping mechanism, step electromagnet, reset switch, tablet, current sensor, power current inhibitor, time delay step electromagnet, arc-chute, arc extinguishing magnetic blow-out plate and upper, lower terminals, overcurrent protective device and thermel protection device.
Utilize technical scheme of the present invention, reach corresponding technique effect, or the technical scheme equivalents under design philosophy when not departing from this, all within protection scope of the present invention.
Claims (10)
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, current sensor, time delay step electromagnet, sensing chip, break contact, flow restricter, tripping mechanism; Described power current inhibitor is connected on surge and releases on path; Described break contact comprises moving contact and fixed contact; Described current sensor is sleeved on surge and releases on path, and is connected with time delay step electromagnet input; Described time delay step electromagnet controls sensing chip action; 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.
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: adopt and realize the time delay step electromagnet that parametrization controls, as the foundation of disjunction SPD path according to the time difference of lightning current and power current.
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 current sensor, overcurrent protective device, thermel protection device, flow restricter, time delay step electromagnet, electromagnetism actuating mechanism, break contact, tripping mechanism; same housing can be positioned at, 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 electronic devices such as 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 electronic devices such as piezo-resistance, discharge tube, TVS one or a combination set of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660163.2A CN105576636A (en) | 2014-11-08 | 2014-11-08 | Novel surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410660163.2A CN105576636A (en) | 2014-11-08 | 2014-11-08 | Novel surge protection device |
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| CN105576636A true CN105576636A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410660163.2A Pending CN105576636A (en) | 2014-11-08 | 2014-11-08 | Novel surge protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879635A (en) * | 2018-07-02 | 2018-11-23 | 李红斌 | A kind of SPD special external disconnector |
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| EP0350477A2 (en) * | 1988-07-06 | 1990-01-10 | Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft | Disconnexion device for surge arresters |
| EP0860927A1 (en) * | 1997-02-12 | 1998-08-26 | Felten & Guilleaume Austria AG | Protection circuit arrangement for surge arrester |
| CN203218873U (en) * | 2012-12-05 | 2013-09-25 | 孙巍巍 | Novel surge protector |
| CN103779855A (en) * | 2012-10-26 | 2014-05-07 | 孙巍巍 | Novel surge protector |
| CN103855699A (en) * | 2012-12-06 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN103855698A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN204391711U (en) * | 2014-11-08 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
-
2014
- 2014-11-08 CN CN201410660163.2A patent/CN105576636A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0350477A2 (en) * | 1988-07-06 | 1990-01-10 | Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft | Disconnexion device for surge arresters |
| EP0860927A1 (en) * | 1997-02-12 | 1998-08-26 | Felten & Guilleaume Austria AG | Protection circuit arrangement for surge arrester |
| CN103779855A (en) * | 2012-10-26 | 2014-05-07 | 孙巍巍 | Novel surge protector |
| CN203218873U (en) * | 2012-12-05 | 2013-09-25 | 孙巍巍 | Novel surge protector |
| CN103855698A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN103855699A (en) * | 2012-12-06 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN204391711U (en) * | 2014-11-08 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879635A (en) * | 2018-07-02 | 2018-11-23 | 李红斌 | A kind of SPD special external disconnector |
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Application publication date: 20160511 |
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