CN102447252B - Protective device - Google Patents
Protective device Download PDFInfo
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- CN102447252B CN102447252B CN201010574041.3A CN201010574041A CN102447252B CN 102447252 B CN102447252 B CN 102447252B CN 201010574041 A CN201010574041 A CN 201010574041A CN 102447252 B CN102447252 B CN 102447252B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 59
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- 230000000694 effects Effects 0.000 abstract description 8
- 239000000284 extract Substances 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention provides a kind of protective device, SPD plug can be made easily to carry out for the insertion of socket or extract, alleviate the burden of operating personnel.Protective device (1) is made up of SPD plug (40) and socket (10).SPD plug (40) and socket (10) are by the socket contact (34-1 in socket (10) side, the plug terminal (49-1,49-2) embedding SPD plug (40) side 34-2) is electrically connected.SPD plug (40) is being inserted under the state being arranged on socket (10), due to the engaging recessed part (47-1 by making SPD plug (40) side, 47-2) and the engaging protuberance (29-1 of socket (10) side, 29-2) engage and fix this SPD plug (40), therefore, the effect of the locking function brought by this engaging, can keep the stable installment state of SPD plug (40).
Description
Technical field
The present invention relates to as surge protector (SurgeProtectiveDevice; hereinafter referred to as " SPD ") power supply use wait protective device, this surge protector to be used for the abnormal voltage such as thunder, surge that brings out from the interchange 380V power circuit such as used by railway etc. and abnormal current protection power source equipment etc.
Background technology
In the past, such as, described in patent documentation 1 described as follows, power supply protective device had: be connected to power line and earth connection terminal etc. socket and be accommodated with the SPD plug of protection component, this SPD plug is configured to can insert or depart from socket.The protection component being accommodated in SPD plug is made up of piezo-resistance (varistor), this piezo-resistance for make from power line invade the abnormal voltage such as thunder, surge and abnormal current flow to earth connection side.
The plug terminal be such as made up of sheet metal is provided with highlightedly in SPD plug.In socket, be provided with the socket contact be made up of pair of metal sheet in the position relative with this plug terminal.If insert the plug terminal of SPD plug side in the socket contact of socket side, then plug terminal is configured the pair of metal sheet clamping of this socket contact, and plug terminal and socket contact are electrically connected.
This power supply protective device is by carrying out action with protection power source equipment from the abnormal voltage of power line and the intrusion of abnormal current.If the protection component in SPD plug worsens, then extract this SPD plug worsened from socket, socket inserts new SPD plug, thus safeguards etc.
Patent documentation 1:(Japan) JP 2008-283065 publication
But, in former protective device, there is following problem.
Be necessary in the contact site of plug terminal and socket contact the pulse current that conducting is large, if the contact condition of this contact site is insufficient, when conduction pulses electric current, produce spark in this contact site and be fused together.In order to avoid producing this phenomenon, former protective device is configured to: by the socket contact be made up of pair of metal sheet, clamps the plug terminal be made up of sheet metal from both sides securely.
For this reason, when changing SPD plug, SPD plug dominated by hand and extracting from socket.Now, due to usual multiple protective device and row arrangement, therefore, limit the position of SPD plug dominated by hand.And, in order to seek miniaturization, reduce the size of protective device as far as possible, therefore, narrow with the position of fingerhold, thus SPD plug can not be held securely.Due to such reason, when carrying out maintenance etc., be difficult to carry out the operation from socket dismounting SPD plug.
Summary of the invention
Protective device of the present invention has connection socket on the line and plug, and this plug can insert and be arranged on described socket with inserting or depart from, and suppresses the abnormal voltage and the abnormal current that propagate into described circuit.
Described socket has: socket shell, and it has the plug resettlement section for can accommodate described plug with inserting or depart from; Socket contact, it is arranged at the bottom surface of described plug resettlement section, with described connection; First holding section, it is arranged at the side of described plug resettlement section.
Described plug has: jack shell, and it can be arranged on described plug resettlement section with inserting or depart from; Second holding section, it is arranged at the side of described jack shell, can be sticked in described first holding section with installing or depart from; Plug terminal, it is arranged at the bottom surface of described jack shell, can embed described socket contact with inserting or depart from; Protection component, it is connected with described plug terminal in described jack shell, suppresses the described abnormal voltage that invades from described socket contact and described plug terminal and described abnormal current.
Described socket contact has: cylindrical portion, and it has elasticity, one end open, and the other end is closed; First installation portion, it is set to extend from the described other end of described cylindrical portion; Cutting groove, this cutting groove multiple is set to extend from described one end of described cylindrical portion to the described other end.
And described plug terminal has: cylindrical portion, it can embed in described cylindrical portion with inserting or depart from; Second installation portion, it is set to extend from described cylindrical portion.
According to protective device of the present invention, obtain the effect of following (1) and (2).
(1) plug terminal that plug and socket plate is configured to by embedding plug side in the socket contact of socket side is electrically connected.Because the cylindrical portion of plug terminal side and the cylindrical portion of socket contact side are electrically connected by being fitted together to, therefore, large relative to the surface current path of the pulse current with high frequency characteristics.Therefore, even if the exposure level of the contact site of cylindrical portion and cylindrical portion is comparatively light, pulse current also can be made successfully to flow, therefore the fusing that former loose contact causes can not occur, easily carry out plug for the insertion of socket or extract.
Particularly, because the exposure level of the contact site of plug terminal and socket contact is light, therefore, easily pulls out with a hand plug, the burden of operating personnel can be alleviated.
And, plug is being inserted under the state being installed on socket, owing to fixing this plug by making the first holding section of the second holding section of plug side and socket side engage, therefore, by the effect of locking function brought by this engaging, the stable installment state of plug can be kept.
(2) because plug and socket plate is configured to be electrically connected by making plug terminal and socket contact be fitted together to, therefore, by reducing plug terminal and socket contact, the miniaturization of protective device can easily be realized.
Accompanying drawing explanation
Fig. 1 is the stereogram of the protective device overall appearance representing first embodiment of the invention;
Fig. 2 is the stereogram of the released state representing socket 10 in the protective device 1 of Fig. 1 and SPD plug 40;
Fig. 3 is the stereogram of the SPD plug 40 seeing Fig. 2 from bottom surface;
Fig. 4 A is the front view of the protective device 1 of Fig. 1;
Fig. 4 B is the vertical view of the protective device 1 of Fig. 1;
Fig. 4 C is the left side view of the protective device 1 of Fig. 1;
Fig. 4 D is the right side view of the protective device 1 of Fig. 1;
Fig. 4 E is the upward view of the protective device 1 of Fig. 1;
Fig. 5 A is the front view of the socket 10 of Fig. 2;
Fig. 5 B is the vertical view of the socket 10 of Fig. 2;
Fig. 5 C is the left side view of the socket 10 of Fig. 2;
Fig. 5 D is the right side view of the socket 10 of Fig. 2;
Fig. 5 E is the upward view of the socket 10 of Fig. 2;
Fig. 6 A is the front view of the SPD plug 40 of Fig. 2;
Fig. 6 B is the vertical view of the SPD plug 40 of Fig. 2;
Fig. 6 C is the left side view of the SPD plug 40 of Fig. 2;
Fig. 6 D is the right side view of the SPD plug 40 of Fig. 2;
Fig. 6 E is the upward view of the SPD plug 40 of Fig. 2;
Fig. 7 A is the stereogram of the released state representing plug terminal 49-1 and socket contact 34-1;
Fig. 7 B is the profile representing the plug terminal 49-1 of Fig. 7 A and the engagement state of socket contact 34-1;
Fig. 8 is the circuit diagram of the protective device 1 of Fig. 1;
Fig. 9 is the schematic circuit diagram of the example of the protective device 1 representing Fig. 1;
Figure 10 A is the stereogram of the plug terminal 149 of the SPD plug side represented in second embodiment of the invention and the socket contact 134 of socket side;
Figure 10 B is the profile representing the plug terminal 149 of Figure 10 A and the engagement state of socket contact 134;
Figure 11 A is the stereogram of the plug terminal 149 of the SPD plug side represented in third embodiment of the invention and the socket contact 134A of socket side;
Figure 11 B is the profile representing the plug terminal 149 of Figure 11 A and the engagement state of socket contact 134A.
Description of reference numerals
1,1-1 ~ 1-3 protective device
10 sockets
20 socket shells
29-1,29-2 engage protuberance
31-1,31-2 socket contact patchhole
34-1,34-2,134,134A socket contact
35 diverter switches
40SPD plug
41 jack shell
44 display windows
47-1,47-2 engaging recessed part
49-1,49-2,149 plug terminals
60 lightning arresters
61 varistor section
61-1,61-2 piezo-resistance
62 cutting portions
64 displays
Embodiment
If read the explanation of preferred embodiment below with reference to accompanying drawing, be then well understood to for implementing mode of the present invention.Wherein, accompanying drawing is exclusively used in explanation, the scope be not intended to limit the present invention.
[the first embodiment]
(structure of the first embodiment)
Fig. 1 is the stereogram of the protective device overall appearance representing first embodiment of the invention.Fig. 2 is the stereogram of the released state representing socket 10 in the protective device 1 of Fig. 1 and SPD plug 40.
This protective device 1 be for suppress invade circuit (such as power line) the abnormal voltage such as thunder, surge and abnormal current with the power supply protective device of protection power source equipment; have socket 10 and plug (such as SPD plug) 40, this protective device 1 is configured to this SPD plug 40 and can inserts with inserting or depart from along direction shown in the arrow in Fig. 2 and be arranged on socket 10.
Fig. 3 is the stereogram of the SPD plug 40 seeing Fig. 2 from bottom surface.Fig. 4 A ~ Fig. 4 E is five figure of the protective device 1 shown in Fig. 1.In five figure of Fig. 4 A ~ Fig. 4 E, Fig. 4 A is the front view of protective device 1, and Fig. 4 B is the vertical view of protective device 1, and Fig. 4 C is the left side view of protective device 1, and Fig. 4 D is the right side view of protective device 1, and Fig. 4 E is the upward view of protective device 1.Fig. 5 A ~ Fig. 5 E is five figure of the socket 10 shown in Fig. 2.In five figure of Fig. 5 A ~ Fig. 5 E, Fig. 5 A is the front view of socket 10, and Fig. 5 B is the vertical view of socket 10, and Fig. 5 C is the left side view of socket 10, the right side view of Fig. 5 D socket 10, and Fig. 5 E is the upward view of socket 10.Fig. 6 A ~ Fig. 6 E is five figure of the SPD plug 40 of Fig. 2.In five figure of Fig. 6 A ~ Fig. 6 E, Fig. 6 A is the front view of SPD plug 40, and Fig. 6 B is the vertical view of SPD plug 40, and Fig. 6 C is the left side view of SPD plug 40, and Fig. 6 D is the right side view of SPD plug 40, and Fig. 6 E is the upward view of SPD plug 40.
As shown in Fig. 2, Fig. 4 A ~ Fig. 4 E and Fig. 5 A ~ Fig. 5 E, socket 10 has socket shell 20, and this socket shell 20 has the plug resettlement section 20a for can accommodate SPD plug 40 with inserting or depart from.Socket shell 20 is by the abutment portion 21 of roughly box-shaped and the pair of sidewalls portion 22-1 that upwardly-directed extends from the two sides of this abutment portion 21, and 22-2 is formed.By by these abutment portion 21 and sidewall portion 22-1, the region that 22-2 surrounds forms plug resettlement section 20a.As shown in Fig. 5 A and Fig. 5 E, on the bottom surface of abutment portion 21, be separated by a distancely relatively set with fixed claw 23 and the moving jaws 24 as track card.Moving jaws 24 is subject to the power (tobespringbiased) of not shown spring to the direction of fixed claw 23.Clamp such as not shown DIN rail road by these fixed claws 23 and moving jaws 24, socket 10 is releasably fixed on this DIN rail road.DIN rail road is the metalwork on the equipment being such as arranged on wide 35mm determined by DIN specification.
As shown in Figure 5 C, on the lateral surface of a sidewall portion 22-1, be provided with such as four cable entrance hole 25-11 ~ 25-14.As shown in Figure 5 B, on the end face of a sidewall portion 22-1, be formed with two screw open pore 26-11,26-12.At each screw open pore 26-11, in 26-12, be separately installed with terminal screw 27-11,27-12.The terminal part inserting the not shown cable of cable entrance hole 25-11 or 25-12 is fixed by terminal screw 27-11.Similarly, the terminal part inserting the not shown cable of cable entrance hole 25-13 or 25-14 is fixed by terminal screw 27-12.
As shown in Figure 5 D, on the lateral surface of another sidewall portion 22-2, be provided with such as four cable entrance hole 25-21 ~ 25-24.As shown in Figure 5 B, on the end face of another sidewall portion 22-2, be formed with two screw open pore 26-21,26-22.At each screw open pore 26-21, in 26-22, be separately installed with terminal screw 27-21,27-22.The terminal part inserting the not shown cable of cable entrance hole 25-21 or 25-22 is fixed by terminal screw 27-22.Similarly, the terminal part inserting the not shown cable of cable entrance hole 25-23 or 25-24 is fixed by terminal screw 27-21.
As shown in Fig. 5 A, Fig. 5 B, Fig. 5 D, Fig. 5 E, on the lateral surface of another sidewall portion 22-2, be provided with highlightedly at the lower position of cable entrance hole 25-24 and exchange identification terminal 28.
As shown in Fig. 2 and Fig. 5 B, on a side (that is, the medial surface of a sidewall portion 22-1) of plug resettlement section 20a, be provided with the first holding section (such as engaging protuberance) 29-1 highlightedly in central upper position.The guide rail 30-11 of the section convex extended longitudinally is provided with highlightedly, 30-12 in the both sides of engaging protuberance 29-1.Similarly, on another side (that is, the medial surface of another sidewall portion 22-2) of plug resettlement section 20a, the first holding section (such as engaging protuberance) 29-2 is provided with highlightedly in central upper position.The guide rail 30-21 of the section convex extended longitudinally is provided with highlightedly in the side of engaging protuberance 29-2.
On the bottom surface (that is, the end face of abutment portion 21) of plug resettlement section 20a, be separated by a distancely relatively formed with two circular socket contact patchhole 31-1,31-2.In the end face central authorities of abutment portion 21, be formed with square cut-out link patchhole 32.And, at socket contact with near patchhole 31-1 and cut-out link patchhole 32, be formed with square being mistakenly inserted and prevent with patchhole 33.
As shown in Fig. 2, Fig. 3 and Fig. 6 A ~ Fig. 6 E, SPD plug 40 has the jack shell 41 of roughly cubic.The end face of jack shell 41 and four sides are closed, and bottom surface is provided with peristome 41a.Multiple embedded hole 42 is formed at the side lower of jack shell 41.Peristome 41a is closed by the substrate 43 of general square shape.Be formed with not shown multiple juts in the side of substrate 43, by making this jut embed embedded hole 42, substrate 43 is releasably fixed on peristome 41a.
On the end face of jack shell 41, be formed with the display window 44 of the degradation mode for showing internal circuit.
As shown in Figure 6 C, the left surface of jack shell 41 is corresponding with the medial surface of the sidewall portion 22-1 of in socket shell 20.Be formed with the groove 45-1 of roughly U-shaped at the first half of the left surface of this jack shell 41, be formed possess flexible movable part 46-1 by this groove 45-1, this movable part 46-1 can move up in the side substantially vertical relative to side.The second holding section (such as engaging recessed part) 47-1 is provided with in the bottom of movable part 46-1.SPD plug 40 insert be installed on socket 10 time, the engaging protuberance 29-1 of engaging recessed part 47-1 receiving socket shell 20 side and can being fastened on being fitted together to or departing from this engaging protuberance 29-1.
In the Lower Half of the left surface of jack shell 41, be formed with gathering sill 48-1 in the longitudinal direction of central authorities.When SPD plug 40 inserts or departs from socket 10, gathering sill 48-1 receives and the engaging protuberance 29-1 of guide socket shell 20 side.A pair gathering sill 48-11 is longitudinally formed, 48-12 in the both sides of gathering sill 48-1.When SPD plug 40 inserts or departs from socket 10, gathering sill 48-11,4-12 receive and the guide rail 30-11 of guide socket shell 20 side, 30-12.
Shown in Fig. 6 D, the right flank of jack shell 41 is corresponding with the medial surface of another sidewall portion 22-2 in socket shell 20.Be formed with the groove 45-2 of roughly U-shaped at the first half of the right flank of this jack shell 41, be formed have flexible movable part 46-2 by this groove 45-2, this movable part 46-2 can move up in the side substantially vertical relative to side.The second holding section (such as engaging recessed part) 47-2 is provided with in the bottom of movable part 46-2.SPD plug 40 insert be installed on socket 10 time, the engaging protuberance 29-2 of engaging recessed part 47-2 receiving socket shell 20 side and can being fastened on being fitted together to or departing from this engaging protuberance 29-2.
In the Lower Half of the right flank of jack shell 41, be formed with gathering sill 48-2 in the longitudinal direction of central authorities.When SPD plug 40 inserts or departs from socket 10, gathering sill 48-2 receives and the engaging protuberance 29-2 of guide socket shell 20 side.Gathering sill 48-21 is longitudinally formed at the one-sided of gathering sill 48-2.When SPD plug 40 inserts or departs from socket 10, gathering sill 48-21 receives and the guide rail 30-21 of guide socket shell 20 side.
As shown in Fig. 3 and Fig. 6 E, the substrate 43 of the bottom surface of jack shell 41 is corresponding with the end face of the abutment portion 21 in socket shell 20.Separated by a distancely on substrate 43 relatively and be highlightedly provided with two plug terminal 49-1,49-2.Plug terminal 49-1,49-2 insert the socket contact patchhole 31-1 of socket shell 20 side, 31-2.Square through hole 50 is formed in the central authorities of substrate 43.The bottom 51b of cut-out link can be inserted with giving prominence to or retreat at through hole 50.When SPD plug 40 inserts or departs from socket 10, the bottom 51b of cut-out link inserts the cut-out link patchhole 32 of socket shell 20 side.
Be provided with highlightedly to be mistakenly inserted near plug terminal 49-1 and through hole 50 and prevent sheet 52.Along with the profile of the SPD plug 40 being suitable for socket 10 is different, be mistakenly inserted and prevent sheet 52 to have different shapes, be colored different colors, when the SPD plug 40 of suitable configuration inserts socket 10, embed being mistakenly inserted of socket 10 side and prevent with patchhole 33.Prevent sheet 52 from inserting patchhole 33 and this is mistakenly inserted and prevents sheet 52 and patchhole 33 to be fitted, then the profile (Japanese: pattern) of socket 10 and the form fit of SPD plug 40 if be mistakenly inserted.Thus, form and can prevent socket 10 that profile is different and the structure that SPD plug 40 is installed by mistake.
Mensuration terminal 53 is installed near through hole 50.Mensuration terminal 53 is the terminals whether well waited for measuring internal circuit.
Fig. 7 A represents plug terminal 49-1 in Fig. 3, Fig. 6 A, Fig. 6 C ~ Fig. 6 E and the stereogram of the released state of socket contact in the patchhole 31-1 that is arranged in Fig. 2.Fig. 7 B is the profile of the engagement state representing plug terminal 49-1 and socket contact in fig. 7.
Two plug terminal 49-1 in Fig. 3, Fig. 6 A, Fig. 6 C ~ Fig. 6 E, 49-2 has identical structure, therefore, the following describes the structure of a plug terminal 49-1 and socket contact corresponding with it.
Socket contact 34-1 by having flexible cylindrical portion 34a, be formed at multiple cutting groove 34c of this cylindrical portion 34a and the first installation portion (such as the first threaded portion) 34d forms, and formed by metal parts.
Cylindrical portion 34a is one end open and the parts that are closed of the other end, and this cylindrical portion 34a is arranged in this patchhole 31-1 from the mode that the patchhole 31-1 of socket shell 20 side exposes to make its opening.The external diameter of the opening of cylindrical portion 34a is less than the external diameter at closed position.Tapering 34b is formed in the inner side of the opening front end of cylindrical portion 34a.Multiple cutting groove 34c is the elongated groove of the opening from one end of cylindrical portion 34a to the closed position extension of the other end.By the plurality of cutting groove 34c, cylindrical portion 34a, there is the elastic force in bore direction and play elasticity.Threaded portion 34d is the parts extended from the closed position of the other end of cylindrical portion 34a, is screwed into and is fixed on the not shown metalwork in socket shell 20.
Plug terminal 49-1 is formed by cylindrical portion 49a with from the second installation portion (such as flange 49b and the second threaded portion 49c) that this cylindrical portion 49a is extended, and is formed by metal parts.
Cylindrical portion 49a has the external diameter roughly the same with the internal diameter of cylindrical portion 34a, as shown in the arrow of Fig. 7 A, is the parts that can embed with inserting or depart from this cylindrical portion 34a.Flange 49b is extension and is arranged on the parts of cylindrical portion 49a.Threaded portion 49c is the parts extending from flange 49b and arrange, and this threaded portion 49c inserts the through hole being formed at substrate 43, and is screwed into and is fixed on the not shown metalwork of the inner side being arranged at this substrate 43.
Fig. 8 is the circuit diagram of the protective device 1 shown in Fig. 1.
The diverter switches such as sensitive switch 35 are provided with in the abutment portion 21 of socket shell 20.Diverter switch 35 is configured in be cut off immediately below link patchhole 32, by the sub-35b of normally closed terminal 35a, Chang Kaiduan, public terminal 35c, can form by movable contact spring 35d.Can be configured to by movable contact spring 35d: one end is connected with public terminal 35c, and the other end is provided with contact.If can the bottom 51b of movable contact spring 35d connected component 51 push, the then contact of another side and the contact of the sub-35b of Chang Kaiduan, if link 51 rises, then as shown by the arrows in fig. 8, the contact of its another side rise by spring force and with the contact of normally closed terminal 35a side.This diverter switch 35 is connected with exchange identification terminal 28.
Exchange identification terminal 28 and have three terminal 28-1 ~ 28-3, the sub-35b of this terminal 28-1 and Chang Kaiduan connects, and terminal 28-2 is connected with public terminal 35c, and terminal 28-3 is connected with normally closed terminal 35a.Therefore, it is possible to externally transmit the signal of telecommunication of the connection status diverter switch 35 from terminal 28-1 ~ 28-3.
Protection component is provided with in jack shell 41; this protection component is used for suppressing or absorbing from the terminal screw 27-11 of cable via line (L/N) side being connected to circuit (such as power line), abnormal voltage and the abnormal current such as thunder, surge that 27-12, socket contact 34-1 and plug terminal 49-1 invade.As protection component; such as have lightning-arrest pipe (i.e. lightning arrester (Ar)) 60 and varistor section 61, these lightning arresters 60 and varistor section 61 are connected in series online between (L/N) side plug terminal 49-1 and ground connection (PE) side plug terminal 49-2.Line (L/N) side plug terminal 49-1 is via the terminal screw 27-11 of socket contact 34-1 and line (L/N) side, and 27-12 is connected with power line side.Ground connection (PE) side plug terminal 49-2 is via the terminal screw 27-21 of socket contact 34-2 and ground connection (PE) side, and 27-22 is connected with ground connection GND side.
Lightning arrester 60 is discharged by the abnormal voltage such as thunder, surge that invades from socket contact 34-1 and plug terminal 49-1 and abnormal current.Varistor section 61 has such as two piezo-resistances (Va) 61-1,61-2, and these piezo-resistance 61-1,61-2 are connected in parallel.Piezo-resistance 61-1,61-2 is such element: have abnormal voltage and abnormal current if be transfused to, resistance then between input and output reduces, make to be in short-circuit condition between these input and output, after abnormal voltage and abnormal current are eliminated, resistance between input and output increases, and makes to be in state of insulation between these input and output.
Reason lightning arrester 60 and piezo-resistance 61-1,61-2 combination used as protection component is as follows.
Namely, power circuit only uses lightning arrester 60, lightning arrester 60 is because of after abnormal current (i.e. pulse current) discharges, even if after this pulse current disappears, also there is the continuous current phenomenon being continued electric discharge by alternating current, thus the lost of life of lightning arrester 60, or so that there is scaling loss.In order to block such continuous current, by lightning arrester 60 and piezo-resistance 61-1,61-2 tandem compound.In addition, power circuit only uses piezo-resistance 61-1, when 61-2, if consider, characteristic worsens along with the increase of the action frequency caused by pulse current, then leakage current increases, and finally causes scaling loss, therefore, in order to block leakage current, lightning arrester 60 is connected in series with piezo-resistance 61-1,61-2.The quantity of piezo-resistance 61-1,61-2 sets according to the size of pulse current.
Mensuration terminal 53 and cutting portion 62 is connected with between lightning arrester 60 and piezo-resistance 61.Cutting portion 62 to arrange object as follows: to wait and before scaling loss of generating heat because worsening, as shown by the arrows in fig. 8, from this varistor section 61 of circuitry cuts to prevent cigarette or fire in varistor section 61.Cutting portion 62 is formed by the female contact 62a be connected with varistor section 61 by metalwork with by the male contact 62b that metalwork is connected with lightning arrester 60.Female contact 62a such as has cylindrical portion, is formed with multiple cutting groove along its length at the opening of this cylindrical portion.Male contact 62b such as has cylindrical portion, and this cylindrical portion has the structure that can embed with inserting or depart from the cylindrical portion of female contact 62a.The junction of female contact 62a and male contact 62b is fixed by the grafting material (such as solder material) of heating and melting.
Male contact 62b is connected with cut-out link 51.Link 51 forms roughly elongated tabular, has upper end 51a and bottom 51b.This link 51 is configured to move up and down in vertical direction, as shown by the arrows in fig. 8, is upwardly-directed subject to the power that helical spring 63 applies.If varistor section 61 is generated heat because deterioration waits, this heat is delivered to the junction of female contact 62a and male contact 62b via metalwork, the solder material melting of this junction.If solder material melting, link 51 is risen by helical spring 63, and male contact 62 is extracted from female contact 62a.Thus, the electrical connection between lightning arrester 60 and varistor section 61 is cut off, thus varistor section 61 is by from circuitry cuts.
If generation deterioration etc. are abnormal in varistor section 61, because the bottom 51b of link 51 rises, therefore, the connection status of diverter switch 35 is switched, and the signal of telecommunication self-exchange identification terminal 28 of this connection status externally transmits.
Display 64 is provided with directly over the upper end 51a of link 51.Display 64 is configured to: such as, if the upper end 51a of link 51 rises, then links with it, and colored article etc. are mobile and the color of coloring site changes, and the change of this color is exposed from display window 44.
Fig. 9 is the schematic circuit diagram of the example of the protective device 1 representing Fig. 8.
Such as, exchange on the power line 70-1 ~ 70-3 of 400V in the phase three-wire three formula of no ground phase, be connected with the protected equipment 71 such as power-supply device.In order to protect protected equipment 71 from the abnormal voltage such as thunder, surge and abnormal current, use the protective device 1 shown in three Fig. 8.Three protective device 1-1 ~ 1-3 are arranged on not shown DIN rail road.In protective device 1, the terminal screw 27-11 position of line (L/N) side uses cable to be connected with power line 70-3, and the terminal screw 27-22 position of ground connection (PE) side uses cable to be connected with ground connection GND.Similarly, other protective devices 1-2,1-3 is also connected to power line 70-2, between 70-1 and ground connection GND.
(installation method of protective device)
Below, the method for the protective device 1 that not shown DIN rail road is installed the first embodiment is described.
As shown in Figure 5A, overcome the active force of not shown spring with hand, the moving jaws 24 of the bottom surface of right direction mobile socket plate 10, inserts the top in DIN rail road between fixed claw 23 and moving jaws 24.If decontrol hand from moving jaws 24, moving jaws 24 moves by the active force left direction of not shown spring.Thus, be fixed pawl 23 and moving jaws 24 of the top in DIN rail road clamps, and socket 10 is fixed on DIN rail road.
As shown in Fig. 5 C, Fig. 5 D and Fig. 9, in socket 10, such as, insert the terminal part of the not shown cable be connected with power line 70-3 in the cable entrance hole 25-12 of online (L/N) side, and make terminal screw 27-11 fastening and connect this cable.And, in the cable entrance hole 25-22 of ground connection (PE) side, insert the terminal part of the not shown cable be connected with ground connection GND, and make terminal screw 27-22 fastening and connect this cable.
Below, the method inserted in socket 10 and install SPD plug 40 is described.
As shown in Fig. 2, Fig. 5 A, Fig. 5 B and Fig. 6 A ~ Fig. 6 E, in SPD plug 40, the movable part 46-1 of two sides dominated by hand, near 46-2, at the gathering sill 48-11 of SPD plug 40 side, in 48-12,48-21, insert the guide rail 30-11 of socket 10 side, 30-12,30-21, make SPD plug 40 push.So the engaging protuberance 29-1 of socket 10 side, 29-2 slide in the gathering sill 48-1 of SPD plug 40 side, 48-2, make SPD plug 40 decline.If the bottom surface of SPD plug 40 drops to the end face of the abutment portion 21 of socket 10 side, the engaging recessed part 47-1 of SPD plug 40 side, 47-2 are embedded in the engaging protuberance 29-1 of socket 10 side, 29-2.
Simultaneously, the plug terminal 49-1 outstanding from the bottom surface of SPD plug 40, the bottom 51b of 49-2, link 51 and be mistakenly inserted the socket contact patchhole 31-1 preventing sheet 52 from inserting socket 10 side respectively, 31-2, cut off link patchhole 32 and be mistakenly inserted and prevent with patchhole 33.
If plug terminal 49-1,49-2 insert socket contact patchhole 31-1,31-2, then as shown in figures 7 a and 7b, the cylindrical portion 49a of such as plug terminal 49-1 embeds in the cylindrical portion 34a of the socket contact 34-1 be arranged in patchhole 31-1.Thus, plug terminal 49-1,49-2 be arranged on patchhole 31-1, the socket contact 34-1 in 31-2,34-2 is electrically connected.
Then, illustrate and to worsen and the situation of SPD plug 40 that more renews owing to inserting the SPD plug 40 being arranged on socket 10.
As shown in Fig. 2, Fig. 5 B and Fig. 6 A ~ Fig. 6 E, be installed in the SPD plug 40 of socket 10, with the movable part 46-1 of hand by two sides in insertion, 46-2 presses to the inside, make the engaging recessed part 47-1 of SPD plug 40 side, 47-2 departs from from the engaging protuberance 29-1 of socket 10 side, 29-2.Then, if extract the gathering sill 48-1 of SPD plug 40, SPD plug 40 side upward, 48-2,48-11,48-12,48-21 along the engaging protuberance 29-1 of socket 10 side, 29-2 and guide rail 30-11,30-12,30-21 is moved upward, and, the plug terminal 49-1 of the bottom surface of SPD plug 40 side, the bottom 51b of 49-2, link 51 and be mistakenly inserted and prevent sheet 52 respectively from the patchhole 31-1 of socket 10 side, 31-2,32,33 extract, and SPD plug 40 departs from from socket 10.
Afterwards, new SPD plug 40 is inserted to socket 10.
(action of protective device)
In fig .9, such as, when applying the abnormal voltage such as thunder, surge and abnormal current on power line 70-3, protective device 1-1 action and absorb this abnormal voltage and abnormal current, protected equipment 71 is protected from abnormal voltage and abnormal current.Below, with reference to the protective device 1 shown in Fig. 1 ~ Fig. 8, this protection act is described.
If apply the abnormal voltage such as thunder, surge and abnormal current on the power line 70-3 of Fig. 9, in the protective device 1 shown in Fig. 8, this abnormal voltage and abnormal current invade socket contact 34-1 and plug terminal 49-1 from terminal screw 27-11 side.
As shown in figs. 7 a and 7b, cylindrical portion 49a as the plug terminal 49-1 of positive side and the cylindrical portion 34a with flexible socket contact 34-1 as cloudy side is positioned on concentric circles, be electrically connected by chimeric, therefore, the surface current path of high-frequency current is large.The abnormal current (i.e. pulse current) invaded reaches maximum in the short time and decays, and, because the time width of this pulse is short, be tens of μ, therefore, become high frequency characteristics.The pulse current with high frequency characteristics is flowing in the near surface of cylindrical portion 34a and cylindrical portion 49a by skin effect.In the case of a first embodiment, because surface current path is large in the contact site of cylindrical portion 49a and cylindrical portion 34a, therefore, even if the exposure level of this contact site is light, pulse current also can be made successfully to flow.Therefore, the fusing that former loose contact causes can not be there is, pulse current can be made successfully to flow.
Lightning arrester 60 is discharged by the pulse current flowing through socket contact 34-1 and plug terminal 49-1, and, piezo-resistance 61-1 in varistor section 61,61-2 is via cutting portion 62 conducting, and this pulse current flows to ground connection GND side via plug terminal 49-2, socket contact 34-2 and terminal screw 27-22.Thus, the protected equipment 71 being connected to power line 70-1 ~ 70-3 is protected.
If varistor section 61 is generated heat because of deterioration, excessive pulse current etc., this heat trnasfer is to the junction of the female contact 62a in cutting portion 62 and male contact 62b, and the solder material of this junction is melted.If solder material melting, upper end 51a and the bottom 51b of link 51 are risen by helical spring 69, and the male contact 62b be connected with this link 51 extracts from female contact 62a.Thus, the electrical connection between lightning arrester 60 and varistor section 61 is cut off, and varistor section 61 by from circuitry cuts, thus prevents cigarette or fire.
If the upper end 51a of link 51 and bottom 51b rises, then diverter switch 35 and the bottom 51b of this link 51 links and its connection status is switched, and the signal of telecommunication of this connection status externally transmits from exchanging identification terminal 28.And then display 64 and the rising interlock of the upper end 51a of link 51 and action, the colored article etc. in this display 64 moves and makes the color of coloring site change (redness when such as, being changed to deterioration from green time normal).Due to from outside by display window 44 can this display 64 visual color change, therefore, it is possible to the replacing period of SPD plug 40 can be grasped.
(effect of the first embodiment)
According to the protective device 1 of the first embodiment, the effect of (1) and (2) below obtaining.
(1) SPD plug 40 and socket 10 are configured to the plug terminal 49-1 being embedded SPD plug 40 side by the socket contact 34-1 in socket 10 side, 34-2, and 49-2 is electrically connected.Because the cylindrical portion 49a of plug terminal 49-1 is positioned on concentric circles with the cylindrical portion 34a with flexible socket contact 34-1, be electrically connected by chimeric, therefore, large relative to the surface current path of the pulse current with high frequency characteristics.Therefore, even if the exposure level of the contact site of cylindrical portion 49a and cylindrical portion 34a is light, also pulse current can be made successfully to flow, thus the fusing that former loose contact causes can not occur, SPD plug 40 can be made easily to carry out for the insertion of socket 10 and extracting.
Particularly, because the exposure level of the contact site of plug terminal 49-1,49-2 and socket contact 34-1,34-2 is light, therefore, easily pulls out with a hand SPD plug 40, the burden of operating personnel can be alleviated.
And, SPD plug 40 is being inserted under the state being installed on socket 10, due to the engaging recessed part 47-1 by making SPD plug 40 side, the engaging protuberance 29-1 of 47-2 and socket 10 side, 29-2 engaging fixes this SPD plug 40, therefore, by the effect of locking function brought by this engaging, the stable installment state of SPD plug 40 can be kept.
(2) because SPD plug 40 and socket 10 are configured to by making plug terminal 49-1; 49-2 and socket contact 34-1; 34-2 is fitted together to be electrically connected; therefore; by reducing plug terminal 49-1; 49-2 and socket contact 34-1,34-2, easily can realize the miniaturization of protective device 1.
[the second embodiment]
Figure 10 A is the stereogram of the plug terminal of the SPD plug side represented in second embodiment of the invention and the socket contact of socket side.Figure 10 B is the profile representing the plug terminal of Figure 10 A and the engagement state of socket contact.
The socket contact 134 of the socket side in the second embodiment is corresponding with the socket contact 34-1 of the first embodiment, by having flexible cylindrical portion 134a, be formed at multiple cutting groove 134c of this cylindrical portion 134a and the first installation portion (such as the first threaded portion) 134d forms, and formed by metal parts.
Cylindrical portion 134a is one end open and the parts that are closed of the other end, and this cylindrical portion 134a is arranged on each patchhole 31-1, in 31-2 respectively in the mode making its opening and expose from each patchhole 31-1, the 31-2 of socket shell 20 side shown in Fig. 2.In cylindrical portion 134a, the external diameter of opening is identical with the external diameter at closed position.Tapering 134b is formed in the inner side of the opening front end of cylindrical portion 134a.Multiple cutting groove 134c is the elongated groove of the opening from one end of cylindrical portion 134a to the closed position extension of the other end.By the plurality of cutting groove 134c, cylindrical portion 134a, there is the elastic force in bore direction and play elasticity.Threaded portion 134d is the parts extended from the closed position of the other end of cylindrical portion 134a, is screwed into and is fixed on the not shown metalwork in the socket shell 20 shown in Fig. 2.
The plug terminal 149 of the SPD side of the second embodiment is formed by cylindrical portion 149a with from the second installation portion (such as flange 149b and the second threaded portion 149c) that this cylindrical portion 149a extends, and is formed by metal parts.
Cylindrical portion 149a has the external diameter roughly the same with the internal diameter of cylindrical portion 134a, as shown in the arrow of Figure 10 A, is the parts that can embed with inserting or depart from this cylindrical portion 134a.Flange 149b is extension and is arranged on the parts of cylindrical portion 149a.Threaded portion 149c is the parts extending from flange 149b and arrange, and this threaded portion 149c inserts the through hole being formed at the substrate 43 shown in Fig. 3, and is screwed into and is fixed on the not shown metalwork of the inner side being arranged at this substrate 43.Annular recessed portion 149d is formed at the end face of the cylindrical portion 149a side of flange 149b.As shown in Figure 10 B, the fore-end of the opening of cylindrical portion 134a is embedded this annular recessed portion 149d and prevents the groove that this fore-end opens to the direction of arrow by annular recessed portion 149d.
In a second embodiment, when plug terminal 149 inserts socket contact 134 and is electrically connected, the cylindrical portion 149a of plug terminal 149 side embeds in the cylindrical portion 134a of socket contact 134 side.Now, the fore-end of the cylindrical portion 134a of socket contact 134 side embeds the annular recessed portion 149d of plug terminal 149 side.
Under the state that plug terminal 149 inserts socket contact 134, flow through the surface current path of this socket contact 134 and plug terminal 149 from the abnormal current (i.e. pulse current) of the power line 70-3 intrusion shown in Fig. 9.Now, the fore-end of the cylindrical portion 134a of socket contact 134 side has the power of opening along the direction of arrow in Figure 10 B by effects such as electromagnetic repulsion forces, may cause loose contact.But the fore-end due to cylindrical portion 134a embeds in the annular recessed portion 149d of plug terminal 149 side, therefore, it is possible to stop the fore-end of this cylindrical portion 134a to prevent loose contact towards opening of the direction of arrow.Therefore, it is possible to keep the stable contact condition of plug terminal 149 and socket contact 134.
[the 3rd embodiment]
Figure 11 A is the stereogram of the plug terminal of the SPD plug side represented in third embodiment of the invention and the socket contact of socket side.Figure 11 B is the profile representing the plug terminal of Figure 11 A and the engagement state of socket contact.
In this Figure 11 A and Figure 11 B, give identical Reference numeral for the key element identical with the key element in Figure 10 B with Figure 10 A shown in the second embodiment.
In the third embodiment, there is the plug terminal 149 of shape difform socket contact 134A with the socket contact 134 of the socket side in the second embodiment and the plug terminal side identical with the second embodiment.In the socket contact 134A of the 3rd embodiment, replace the cylindrical portion 134a of the second embodiment, have two cylindrical portion 134a-1,134a-2, these two cylindrical portion 134a-1,134a-2 have stage portion.
A cylindrical portion 134a-1 embeds the parts in the annular recessed portion 149d of plug terminal 149 side.Another cylindrical portion 134a-2 is such parts: be connected with a cylindrical portion 134a-1, external diameter is greater than this cylindrical portion 134a-1, with the end contact of the flange 149b of plug terminal 149 side.Two cylindrical portion 134a-1,134a-2 have identical internal diameter.Tapering 134b is formed in the inner side of a cylindrical portion 134a-1 front end.Direction from the front end of a cylindrical portion 134a-1 towards another cylindrical portion 134a-2 is formed with multiple cutting groove 134c.By the plurality of cutting groove 134c, cylindrical portion 134a-1,134a-2 have the elastic force in bore direction and play elasticity.Other structures are identical with the socket contact 134 of the second embodiment.
In the third embodiment, as shown in the arrow in Figure 11 A, when plug terminal 149 inserts socket contact 134A and is electrically connected, the cylindrical portion 149a of plug terminal 149 side embeds the cylindrical portion 134a-1 of socket contact 134A side, in 134a-2.Now, the cylindrical portion 134a-1 of socket contact 134A side embeds the annular recessed portion 149d of plug terminal 149 side, and the end contact of the flange 149b of the end face of cylindrical portion 134a-2 and plug terminal 149 side.
Under the state that plug terminal 149 inserts socket contact 134A, flow through the surface current path of this socket contact 134A and plug terminal 149 from the abnormal current (i.e. pulse current) of the power line 70-3 intrusion shown in Fig. 9.Now, due to the end contact of the end face of the cylindrical portion 134a-2 of socket contact 134A side and the flange 149b of plug terminal 149 side, therefore, this surface current path is greater than the surface current path of the second embodiment.Therefore, compared to the second embodiment, pulse current can be made more successfully to flow, the fusing that can more reliably prevent former loose contact from causing.
(variation)
The invention is not restricted to above-described embodiment, various Land use systems and distortion can be implemented.As this Land use systems and variation, such as, there is following (a) ~ (d).
A () can by plug terminal 49,149 and socket contact 34,134,134A change to other shapes beyond diagram and structure.
B () can by the engaging recessed part 47-1 of the engaging protuberance 29-1 of socket 10 side, 29-2 and the SPD plug 40 engaged with it side, 47-2 changes to other shapes and structure.Such as, in socket 10 side, engaging recessed part 47-1 can be set, 47-2, engaging protuberance 29-1 is set in SPD plug 40 side, 29-2.
C socket 10 and SPD plug 40 can be changed to other shapes, structure, circuit formation etc. beyond diagram by ().Such as, in the circuit of the protective device 1 shown in Fig. 8, lightning arrester 60 can be connected to the position of varistor section 61, varistor section 61 be connected to the position of lightning arrester 60.Now, cutting portion 62 can be connected between plug terminal 49-1 and varistor section 61.Thereby, it is possible to obtain the effect identical with the first embodiment.
D () describes the protective device 1 of power supply in an embodiment, but protective device of the present invention also can be applicable to protect the occasion of other protected equipment such as the communication equipment be connected with the All other routes such as order wire.
Claims (6)
1. a protective device, has:
Socket, it connects on the line;
Plug, it can insert and be arranged on described socket with inserting or depart from, and suppresses the abnormal voltage and the abnormal current that propagate into described circuit;
The feature of this protective device is,
Described socket has:
Socket shell, it has the plug resettlement section for can accommodate described plug with inserting or depart from;
Socket contact, it is arranged at the bottom surface of described plug resettlement section, with described connection;
First holding section, it is arranged at the side of described plug resettlement section;
Described plug has:
Jack shell, it can be arranged on described plug resettlement section with inserting or depart from;
Second holding section, it is arranged at the side of described jack shell, can be sticked in described first holding section with installing or depart from;
Plug terminal, it is arranged at the bottom surface of described jack shell, can embed described socket contact with inserting or depart from;
Protection component, it is connected with described plug terminal in described jack shell, suppresses the described abnormal voltage that invades from described socket contact and described plug terminal and described abnormal current;
Described socket contact has:
Cylindrical portion, it has elasticity, one end open, and the other end is closed;
First installation portion, it is set to extend from the described other end of described cylindrical portion;
Cutting groove, this cutting groove multiple is set to extend from described one end of described cylindrical portion to another side described;
Described plug terminal has:
Cylindrical portion, it can embed in described cylindrical portion with inserting or depart from;
Second installation portion, it is set to extend from described cylindrical portion.
2. protective device as claimed in claim 1, is characterized in that,
The first threaded portion is formed at described first installation portion.
3. protective device as claimed in claim 1, is characterized in that,
The second threaded portion is formed at described second installation portion.
4. protective device as claimed in claim 1, is characterized in that,
Be formed in the side of described jack shell and have flexible movable part, this movable part can move up in the side substantially vertical relative to described side;
The bottom of described movable part is provided with described second holding section.
5. protective device as claimed in claim 1, is characterized in that,
Described circuit is power line or order wire;
Described protection component is any one in the combination of one or more lightning arrester, one or more piezo-resistance and lightning arrester and piezo-resistance.
6. protective device as claimed in claim 4, is characterized in that,
Described first holding section is engaging protuberance or engaging recessed part;
Described second holding section is the engaging recessed part or the engaging protuberance that are embedded in described first holding section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010228577A JP5555596B2 (en) | 2010-10-08 | 2010-10-08 | Protector |
| JP228577/10 | 2010-10-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102447252A CN102447252A (en) | 2012-05-09 |
| CN102447252B true CN102447252B (en) | 2015-11-25 |
Family
ID=46009479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010574041.3A Active CN102447252B (en) | 2010-10-08 | 2010-11-30 | Protective device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5555596B2 (en) |
| CN (1) | CN102447252B (en) |
| HK (1) | HK1167521A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017535A (en) * | 2017-05-05 | 2017-08-04 | 徐进 | Electric socket |
| DE102018116354A1 (en) * | 2018-02-27 | 2019-08-29 | Dehn + Söhne Gmbh + Co. Kg | Overvoltage protection arrangement consisting of a horn spark gap located in an insulating housing |
| US11223200B2 (en) * | 2018-07-26 | 2022-01-11 | Ripd Ip Development Ltd | Surge protective devices, circuits, modules and systems including same |
| DE202020101378U1 (en) * | 2019-08-29 | 2020-03-18 | Dehn Se + Co Kg | Pluggable device combination for protection against overvoltages |
| CN213520530U (en) * | 2020-11-11 | 2021-06-22 | 厦门赛尔特电子有限公司 | Surge protection device with anti-disengaging structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169899A (en) * | 2006-10-23 | 2008-04-30 | 孙巍巍 | Signal distributor with electric surge protection |
| CN101320658A (en) * | 2008-06-25 | 2008-12-10 | 上海电器科学研究所（集团）有限公司 | Surge protector with backup protection |
| CN101752855A (en) * | 2008-12-05 | 2010-06-23 | 沈阳铁路信号工厂 | Surge protector capable of preventing mis-insertion |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545200U (en) * | 1970-11-09 | 1980-03-24 | ||
| JPS57148789U (en) * | 1981-03-13 | 1982-09-18 | ||
| JPH0628917Y2 (en) * | 1988-01-07 | 1994-08-03 | 日本電信電話株式会社 | Protector |
| EP1839377B1 (en) * | 2005-01-17 | 2011-08-10 | Dehn + Söhne Gmbh + Co Kg | Plug-in combination of devices, especially for overvoltage protection |
| DE102006033274A1 (en) * | 2005-02-09 | 2008-01-31 | Dehn + Söhne Gmbh + Co. Kg | Plug-in device combination for protection against overvoltages |
| JP4614794B2 (en) * | 2005-03-04 | 2011-01-19 | 株式会社昭電 | Guard with deterioration detection function |
| JP4808674B2 (en) * | 2007-05-11 | 2011-11-02 | 音羽電機工業株式会社 | SPD for power supply |
| JP5504125B2 (en) * | 2010-10-08 | 2014-05-28 | 株式会社サンコーシヤ | Protector |
-
2010
- 2010-10-08 JP JP2010228577A patent/JP5555596B2/en active Active
- 2010-11-30 CN CN201010574041.3A patent/CN102447252B/en active Active
-
2012
- 2012-08-15 HK HK12107999.2A patent/HK1167521A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169899A (en) * | 2006-10-23 | 2008-04-30 | 孙巍巍 | Signal distributor with electric surge protection |
| CN101320658A (en) * | 2008-06-25 | 2008-12-10 | 上海电器科学研究所（集团）有限公司 | Surge protector with backup protection |
| CN101752855A (en) * | 2008-12-05 | 2010-06-23 | 沈阳铁路信号工厂 | Surge protector capable of preventing mis-insertion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102447252A (en) | 2012-05-09 |
| HK1167521A1 (en) | 2012-11-30 |
| JP2012084321A (en) | 2012-04-26 |
| JP5555596B2 (en) | 2014-07-23 |
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