CN105281309A - Novel protection device - Google Patents
Novel protection device Download PDFInfo
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- CN105281309A CN105281309A CN201410342710.2A CN201410342710A CN105281309A CN 105281309 A CN105281309 A CN 105281309A CN 201410342710 A CN201410342710 A CN 201410342710A CN 105281309 A CN105281309 A CN 105281309A
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- control unit
- current sensor
- normally opened
- opened contact
- protective device
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Abstract
The present invention relates to a novel protection device. The novel protection device mainly comprises a current sensor, a control unit, a normally open contact, an overcurrent protection device, a current limiter and a housing. The current sensor, sleeved at the input end of a protected device and connected with the circuit unit, is capable of inducting a current more than a certain amount flowing through the protected device, and the current is outputted to the control unit; the control unit is in mechanical connection with the normally open contact or in electrical connection with the normally open contact or in no connection with the normally open contact, and the control unit is able to allow the normally open contact to be closed; and the normally open contact, the current limiter and the overcurrent protection device are connected in series. The current sensor is capable of inducting a current more than a certain amount flowing through the protected device, and the control unit is able to allow the normally open contact to be closed so that the overcurrent protection device is disconnected, therefore a protected device is protected.
Description
Technical field
The invention belongs to electric power system technical field, propose a kind of safe and reliable novel protector for power-supply system, be used in particular for the protection to low-pressure system surge protector.
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 protection device.Surge protection device has been widely used in various field, has important effect in lightning protection.The quality of its state not only directly affects its lightning protection effect, and owing to generating heat and burn when it damages, can cause secondary disaster.
Present stage, surge protection device had Thermal protection (built-in) and overcurrent protection (internal or external) two kinds of protective devices in use usually.Thermel protection device is used for protecting power current and flows through the heating that lightning protection component causes and damage, and overcurrent protective device is used for preventing lightning protection component puncture short.But there is protection blind area to power current in the protective device of existing surge protection device; so-called protection blind area is exactly when occurring that the power current of a certain scope flows through lightning protection component; because temperature rise is too fast or caloric value is not enough; Thermal protection trip gear can not this process of perception in time and can not complete trip action in time; overcurrent protective device is then also failure to actuate because not reaching entry condition; at this moment, larger power current flows continuously through lightning protection component and causes on fire.
Summary of the invention
In order to effectively solve the protection blind zone problem of existing protective device to surge protection device, the present invention proposes a kind of safe and reliable novel protector for power-supply system, is used in particular for the protection to low-pressure system surge protector.The present invention arranges a current sensor on path is released in surge; current sensor can sense the electric current of more than the certain value flowing through surge protector; and export control unit to; control unit controls normally opened contact and closes; make the second terminal to the path conducting of the 4th terminal, the protected device of short circuit, destructive electric current flows directly into overcurrent protective device; overcurrent protective device disconnects rapidly, thus has cut off the power current in surge protector loop.
The present invention is by the following technical solutions: described protective device mainly comprises current sensor, control unit, normally opened contact, overcurrent protective device, flow restricter and shell, the input that described current sensor is sleeved on protected device is connected with control unit, current sensor can sense the electric current of more than the certain value flowing through protected device, and exports control unit to; Described control unit is mechanically connected with normally opened contact or is electrically connected or is not connected, and control unit can make normally opened contact close; Described normally opened contact, flow plug are connected successively with overcurrent protective device.Described overcurrent protective device can be changed; Can reset after normally opened contact is closed.
Because mounting condition is different, described current sensor, overcurrent protective device and control unit, normally opened contact, flow restricter can be installed on a housing, also can be installed on different housings, common formation novel protector of the present invention.
The present invention also can be applicable to other similar applications of electric power system, not merely for the protection of surge protector.The electric current induction range of current sensor can adjust by changing the method such as material, technique, and the difference according to environment for use sets.
The invention is characterized in:
1. this novel protector solves the protective device of current surge protector to the problem of power current existence protection blind area, the power current in gamut protection surge protector loop; The less power current that can produce harm flowing through surge protector is protected by the thermel protection device of surge protector inside; Protection blind area scope power current is responded to by novel protector current sensor of the present invention and driving control unit makes normally opened contact close, and power current is caused overcurrent protective device and protects; Larger power current is directly protected by the inner overcurrent protective device of the present invention.
2. when surge current flows through surge protector, current sensor of the present invention can not output signal, and ensures normally to release surge current; And when the power current flowing through surge protector is in protection blind area scope; or a little less than protection blind area scope; or higher than protection blind area scope, current sensor will induce current value and export control unit to, then normally opened contact is driven to close conducting by control unit.The current range of current sensor induction comprises and slightly larger than protection blind area scope.
3. control unit can control normally opened contact and continues closed, no longer opens before overcurrent protective device disconnects; The Position Design of normally opened contact, can not by large lightning surge on the path of the second terminal and the 4th terminal, and contact action is single, only need become closed from normally open, simple to the designing requirement of contact; Described control unit can be mechanically connected or be electrically connected with normally opened contact or not be connected.
4. the present invention also can be applicable to other similar applications of electric power system, not merely for the protection of surge protector.The electric current induction range of current sensor can adjust by changing the method such as material, technique, and the difference according to environment for use sets.
Accompanying drawing explanation
Fig. 1 is first embodiment of the present invention structural principle schematic diagram.
Fig. 2 is second embodiment of the present invention structural principle schematic diagram.
Fig. 3 is third embodiment of the present invention structural principle schematic diagram.
Fig. 4 is fourth embodiment of the present invention structural principle schematic diagram.
Fig. 5 is a kind of profile embodiment of second embodiment of the invention.
Wherein: 1-the first terminal, 2-second terminal, 3-the 3rd terminal; 4-the 4th terminal, 5-control unit, 6-normally opened contact; 7-flow restricter, 8-overcurrent protective device, 9-current sensor; the protected device of 10-, 11-shell, 12-holding wire; 13-overcurrent protective device disconnects indicator light, 14-normally opened contact reset spanner, 15-overcurrent protective device replacement port; L-power inleting terminal, N (PE)-ground wire (or zero line).
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is first embodiment of the invention structural principle schematic diagram, and current sensor (9) occupy protective device outside as an independently part as shown in the figure, has independent housing.The front end of described protected device (10) is connected to power inleting terminal in this embodiment, and rear end is connected to the present invention the 3rd terminal (3); Described current sensor (9) is socketed in the front end of protected device (10), and output signal line (12) is connected to the first terminal (1); Described second terminal (2) is connected to power inleting terminal, i.e. the front end of protected device (10), and the 4th terminal (4) is connected to ground wire (or zero line).The inner normally opened contact of protective device shell (11) of the present invention (6), flow restricter (7) and overcurrent protective device (8) are connected between the second terminal (2) and the 4th terminal (4), and the 3rd terminal (3) is also connected to the front end of overcurrent protective device (8); Current sensor (9) is by the first terminal (1) input signal to control unit (5), and control unit (5) can be mechanically connected or be electrically connected with normally opened contact (6) or not be connected.
Fig. 2 is second embodiment of the invention structural principle schematic diagram; current sensor (9) occupy the inside of protective device as shown in the figure, is positioned at same shell (11) with control unit (5), normally opened contact (6), flow plug (7), overcurrent protective device (8).The front end of described protected device (10) is connected to the first terminal of the present invention (1) in this embodiment, and rear end is connected to the present invention the 3rd terminal (3); Described second terminal (2) is connected to power inleting terminal, and the 4th terminal (4) is connected to ground wire (or zero line).The inner normally opened contact of protective device shell (11) of the present invention (6), flow restricter (7) and overcurrent protective device (8) are connected between the second terminal (2) and the 4th terminal (4), and the 3rd terminal (3) is also connected to the front end of overcurrent protective device (8); The first terminal (1) is connected with the second terminal (2), and current sensor (9) is sleeved on the first terminal (1) with on the connecting line of the second terminal (2); Current sensor (9) input signal is to control unit (5), and control unit (5) can be mechanically connected or be electrically connected with normally opened contact (6) or not be connected.
Fig. 3 is third embodiment of the invention structural principle schematic diagram; similar to the first embodiment; the difference of the present embodiment is that overcurrent protective device (8) occupy protective device outside as an independently part, is connected between protective device the 4th terminal (4) and ground wire (or zero line).
Fig. 4 is fourth embodiment of the invention structural principle schematic diagram; similar to the second embodiment; the difference of the present embodiment is that overcurrent protective device (8) occupy protective device outside as an independently part, is connected between protective device the 4th terminal (4) and ground wire (or zero line).
Use method of the present invention; composition graphs 1, Fig. 2, Fig. 3, Fig. 4 embodiment; current sensor (9) can induce the current value comprised within the scope of protection blind area; thus by control unit (5), normally opened contact (6) is closed; overcurrent protective device (8) action, thus solve protection blind zone problem.The current range that described current sensor (9) is responded to comprises and is greater than protection blind area scope, thus ensures that the present invention can gamut stop power current to the damage of surge protector itself.
In the embodiment of Fig. 1, Fig. 2, Fig. 3, Fig. 4, protected device (10) can be surge protector, also can be other similar devices of electric power system.
Fig. 5 is a kind of profile embodiment of second embodiment of the invention, and surface is provided with overcurrent protective device and disconnects indicator light (13), normally opened contact reset spanner (14), overcurrent protective device replacement port (15).When overcurrent protective device (8) disconnects, overcurrent protective device disconnects indicator light (13) and can light; Overcurrent protective device (8) can be changed by overcurrent protective device replacement port (15); Normally opened contact (6) can be resetted by the normally opened contact spanner (14) that resets.
Utilize technical scheme of the present invention, reach corresponding technique effect, or not departing from the technical scheme equivalents under design philosophy of the present invention, all within protection scope of the present invention.
Claims (7)
1. a novel protector, it is characterized in that: protective device comprises current sensor, control unit, normally opened contact, overcurrent protective device, flow restricter and shell, the input that described current sensor is sleeved on protected device is connected with control unit, current sensor can sense the electric current of more than the certain value flowing through protected device, and exports control unit to; Described control unit is mechanically connected with normally opened contact or is electrically connected or is not connected, and control unit can make normally opened contact close; Described normally opened contact, flow plug are connected successively with overcurrent protective device.
2. a kind of novel protector according to claim 1, is characterized in that: described current sensor can not output signal to input driver element when surge current flows through surge path, does not affect the normal guard of lightning protection component to line surge; Current sensor is responded to and outputed signal to input driver element to be made the current range of the actuating of relay comprise and is greater than the Thermal protection of lightning protection component and the protection blind area scope of overcurrent protection.
3. a kind of novel protector according to claim 1, is characterized in that: the electric current induction range of described current sensor can adjust by changing the method such as material, technique, and the difference according to environment for use sets.
4. a kind of novel protector according to claim 1; it is characterized in that: current sensor, overcurrent protective device and control unit, normally opened contact, flow restricter can be installed on a housing, also can be installed on different housings and jointly form novel protector of the present invention.
5. a kind of novel protector according to claim 1, 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.
6. a kind of novel protector according to claim 1, is characterized in that: described overcurrent protective device can be changed; Can reset after normally opened contact is closed.
7. a kind of novel protector according to claim 1, is characterized in that: can reset after described normally opened contact is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342710.2A CN105281309A (en) | 2014-07-16 | 2014-07-16 | Novel protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342710.2A CN105281309A (en) | 2014-07-16 | 2014-07-16 | Novel protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105281309A true CN105281309A (en) | 2016-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410342710.2A Pending CN105281309A (en) | 2014-07-16 | 2014-07-16 | Novel protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105281309A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794528A (en) * | 2005-12-09 | 2006-06-28 | 张家港华捷电子有限公司 | Grounding failure breaker |
| CN103855698A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN204271624U (en) * | 2014-07-16 | 2015-04-15 | 孙麓轩 | A kind of novel protector |
-
2014
- 2014-07-16 CN CN201410342710.2A patent/CN105281309A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794528A (en) * | 2005-12-09 | 2006-06-28 | 张家港华捷电子有限公司 | Grounding failure breaker |
| CN103855698A (en) * | 2012-12-05 | 2014-06-11 | 孙巍巍 | Novel surge protection device |
| CN204271624U (en) * | 2014-07-16 | 2015-04-15 | 孙麓轩 | A kind of novel protector |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160127 |
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| RJ01 | Rejection of invention patent application after publication |