CN204886165U

CN204886165U - Novel surge protector

Info

Publication number: CN204886165U
Application number: CN201420691800.8U
Authority: CN
Inventors: 孙麓轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-08
Filing date: 2014-11-08
Publication date: 2015-12-16
Anticipated expiration: 2024-11-08

Abstract

The utility model relates to a novel surge protector, including lightning protection device, overcurrent protect device, hot protection device and shell, lightning protection device and overcurrent protect device establish ties, constitute the surge route of releasing, hot protection device is located the lightning protection device electrode, this novel surge protector is still including judging drive arrangement, current limiter, link gear, normally open contact, judge that drive arrangement and lightning protection device, overcurrent protect device establish ties, constitute the surge route of releasing together, normally open contact and current limiter are established ties and are constituteed the bypass, and the bypass is connected in parallel and is being judged drive arrangement and lightning protection device both ends or connecting in parallel in the lightning protection device both ends. The action blind area problem that this novel surge protector fundamentally solved current hot protection device and overflowed protection device.

Description

A kind of Novel electric surge protector

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, 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; 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 dependable performance, the highly sensitive Novel electric surge protector for power-supply system, the basic action blind zone problem solving existing thermel protection device and overcurrent protective device.

The utility model is by the following technical solutions: the utility model is for the surge protector in power electronic circuits system, this surge protector comprises 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 judging-driving unit, flow restricter, link gear, normally opened contact; Described judging-driving unit is connected with lightning protection component, overcurrent protective device, forms surge together and to release path; Described normally opened contact and flow restricter are composed in series bypass, and bypass is connected in parallel on judging-driving unit and lightning protection component two ends or is parallel to lightning protection component two ends.

Described judging-driving unit is made up of pair of discharge electrodes and an electromagnet, and sparking electrode is in parallel with electromagnet; Described sparking electrode can be that hemispherical protrusions divides the electrode formed in opposite directions, or discharge tube.After described normally opened contact is closed, can not open before overcurrent protective device disconnects, described normally opened contact also has reset switch again.Described lightning protection component, comprises piezo-resistance, discharge tube, TVS one or a combination set of; Described overcurrent protective device can be fuse or circuit breaker; The circuit that described flow restricter can be one of electronic devices such as resistance, inductance, electric capacity or be combined by it, has the effect of Limited Current.Described link gear can have various ways, for when electromagnet push rod is upspring, normally opened contact is closed.

Described judging-driving unit is made up of the sparking electrode of parallel connection and electromagnet, and it has arbitration functions to flowing through the release current type of path of surge, can distinguish lightning surge and power current; The push rod of electromagnet can drive link gear simultaneously, thus closed normally opened contact.

The working method of this Novel electric surge protector:

When lightning surge flows through, its current value is very high to the rate of change of time, coil on the electromagnet of described judging-driving unit has certain inhibitory action to this high-frequency current, cause only having small part electric current to flow through coil soon, very high voltage can be produced instantaneously between two sparking electrodes, punctured instantaneously by two electrodes, lightning current passes through rapidly; The electric current now flowing through the small part of coil also can make electromagnet push rod eject rapidly and regain, but displacement now can not promote link gear, ensures that lightning surge is released smoothly.

When power system failure, power current flow through, lightning protection component by inefficacy short circuit time, in judging-driving unit, magnet spool flows into power current, under the effect of electromagnetic force, push rod is ejected, and the displacement ejected and dynamics are enough to drive link gear motion, normally opened contact is closed, connects bypass; Because bypass is in parallel with judging-driving unit and lightning protection component; so power current will flow through from bypass directly arrive overcurrent protective device; make overcurrent protective device action; timely cut-out SPD path; prevent the too high lightning protection component of temperature on fire (displacement and dynamics that push rod ejects with flow through the size of current of coil, the thickness of coil, the number of turn of coil and electromagnet inside design relevant; can the ejection that decide push rod promote tripping mechanism, and this series of parameter value is by calculating).

When lightning protection component deterioration power frequency leakage current reaches certain value, lightning protection component shell temperature also rises to certain altitude, is positioned at thermel protection device on lightning protection component electrode by action, thus cuts off the lightning protection component being about to damage.

To sum up; judging-driving unit has judgement to lightning surge and power current; link gear can be driven when power current flows through; closed normally opened contact connects bypass; thus make overcurrent protective device action disjunction surge protector path, and then solve existing overcurrent protective device and thermel protection device to the action blind zone problem of power current.

Of the present utility modelly to be characterised in that:

1. this Novel electric surge protector increases and can judge current type and drive link gear to close the judging-driving unit of normally opened contact in path is released in surge; turn increase the bypass being connected in parallel on judging-driving unit and lightning protection component two ends or lightning protection component two ends, solve the action blind zone problem of thermel protection device and overcurrent protective device.Bypass is composed in series by normally opened contact and flow plug, normally opened contact is controlled by link gear, link gear is by the magnet control in judging-driving unit, whether electromagnet action depends on the current type flow through in power supply leakage path, and this current type can be carried out differentiation by sparking electrode in parallel in judging-driving unit and electromagnet and be responded.

2. the lightning protection component of this Novel electric surge protector and judging-driving unit, overcurrent protective device, thermel protection device, flow restricter, link gear, normally opened contact, reset switch 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 installed on different housings or 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 judging-driving unit of this Novel electric surge protector is made up of pair of discharge electrodes and an electromagnet, and sparking electrode is in parallel with electromagnet; Described sparking electrode can be that hemispherical protrusions divides the electrode formed in opposite directions, or discharge tube.Described judging-driving unit has arbitration functions to flowing through the release current type of path of surge, can distinguish lightning surge and power current; The push rod of electromagnet can drive link gear simultaneously, thus closed normally opened contact.

Accompanying drawing explanation

Fig. 1 is the first example structure schematic diagram of the present utility model.

Fig. 2 is judging-driving unit sectional view of the present utility model.

Fig. 3 is judging-driving unit stereogram of the present utility model.

Fig. 4 is the first embodiment principle schematic of the present utility model.

Fig. 5 is the second embodiment principle schematic of the present utility model.

Fig. 6 is the 3rd embodiment principle schematic of the present utility model.

Fig. 7 is the 4th embodiment principle schematic of the present utility model.

Fig. 8 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, 0 is push rod, and 1 is the first terminals; 2 is judging-driving units, and 3 is sparking electrodes, and 4 is electromagnet; 5 is second terminals, and 6 is overcurrent protective devices, and 7 is lightning protection components; 8 is thermel protection devices, and 9 is flow plugs, and 10 is normally opened contacts; 11 is link gears, and 12 is shells, and 13 is that surge is released path; 14 is bypasses, and 15 is reset switches.

Fig. 1 is the first example structure schematic diagram of the present utility model, in figure, solid black lines is that surge is released path (13), is composed in series by judging-driving unit (2), lightning protection component (7) and overcurrent protective device (6); Streak line is bypass (14), is composed in series by normally opened contact (10) and flow plug (9), and described bypass (14) is connected in parallel on judging-driving unit (2) and lightning protection component (7) two ends; Described thermel protection device (8) is positioned on lightning protection component (7) electrode.Reset switch does not draw in this figure.Described judging-driving unit is made up of pair of discharge electrodes and an electromagnet, and sparking electrode is in parallel with electromagnet.It is that hemispherical protrusions divides the embodiment formed in opposite directions that the present embodiment only provides sparking electrode, and the situation of discharge tube repeats no more herein.Mechanism is implemented illustration and is only provided the situation that bypass (14) is parallel to judging-driving unit (2) and lightning protection component (7) two ends, and the principle embodiment that bypass (14) is parallel to lightning protection component (7) two ends provides as the 3rd embodiment at Fig. 6.

When lightning surge releases path (13) by power supply, sparking electrode (3) is by transient switching, lightning surge is released through lightning protection component (7) and overcurrent protective device (6), electromagnet (4) is upper only by few portion of electrical current, and the displacement that push rod (0) ejects is not enough to promote link gear (11) action; When power current flow through surge release path (13) time, sparking electrode (3) both end voltage is not enough to make it puncture conducting, electric current flows through electromagnet (4) and push rod (0) is ejected, the displacement that now push rod (4) ejects is enough to promote link gear (11) and rotates along the direction of arrow in the figure, normally opened contact (2) is closed, and then conducting bypass (14), power current is directly introduced overcurrent protective device (6) by bypass, make overcurrent protective device (6) action, disjunction lightning protection component (7); When power frequency leakage current increases gradually, lightning protection component (7) temperature slowly rises, and is positioned at thermel protection device (8) on lightning protection component (7) electrode by action, thus cuts off the lightning protection component (7) being about to damage.

Fig. 2, Fig. 3 are sectional view and the stereogram of judging-driving unit of the present utility model, and judging-driving unit is made up of pair of discharge electrodes and an electromagnet, and sparking electrode is in parallel with electromagnet; Described sparking electrode can be that hemispherical protrusions divides the electrode formed in opposite directions, or discharge tube.It is that hemispherical protrusions divides the embodiment formed in opposite directions that this figure only provides sparking electrode, and other scheme repeats no more.

Fig. 4 is principle schematic corresponding to Fig. 1 first embodiment, and reset switch (15) can control normally opened contact (10) and recover normally open.

Fig. 5 is this Novel electric surge protector second embodiment principle schematic; overcurrent protective device (6) is not had in the surge protector of this embodiment; only comprise surge to release path (13), bypass (14) and thermel protection device (8), link gear (11), wherein reset switch (15) can control normally opened contact (10) and recovers normally open.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. 6 is this Novel electric surge protector the 3rd embodiment principle schematic; bypass in this embodiment (14) is parallel to lightning protection component (7) two ends, and reset switch (15) can control normally opened contact (10) and recover normally open.

Fig. 7 is this Novel electric surge protector the 4th embodiment principle schematic; in this embodiment, judging-driving unit (2) and overcurrent protective device (6) are positioned at another housing, and reset switch (15) can control normally opened contact (10) and recover normally open.

Fig. 1, Fig. 4, Fig. 6 are lightning protection components (7) with judging-driving unit (2), overcurrent protective device (6), thermel protection device (8), flow restricter (9), link gear (11), normally opened contact (10), reset switch (15) accessible site in the embodiment of one; Fig. 5, Fig. 7 are that lightning protection component (7) also can be installed on different housings from judging-driving unit (2), overcurrent protective device (6), thermel protection device (8), flow restricter (9), link gear (11), normally opened contact (10), reset switch (15) or be encapsulated in the embodiment combined in different modules.

Fig. 8 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.

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

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 judging-driving unit, flow restricter, link gear, normally opened contact; Described judging-driving unit is connected with lightning protection component, overcurrent protective device, forms surge together and to release path; Described normally opened contact and flow restricter are composed in series bypass, and bypass is connected in parallel on judging-driving unit and lightning protection component two ends or is parallel to lightning protection component two ends.

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: described judging-driving unit is made up of pair of discharge electrodes and an electromagnet, and sparking electrode is in parallel with electromagnet.

4. a kind of Novel electric surge protector according to claim 3, is characterized in that: described sparking electrode can be that hemispherical protrusions divides the electrode formed in opposite directions, or discharge tube.

5. 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.

6. a kind of Novel electric surge protector according to claim 1 and 2, is characterized in that: described normally opened contact has reset switch.

7. a kind of Novel electric surge protector according to claim 1 and 2; it is characterized in that: described lightning protection component and judging-driving unit, overcurrent protective device, thermel protection device, flow restricter, link gear, normally opened contact, reset switch 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.