CN204967222U - Overcurrent protection structure - Google Patents
Overcurrent protection structure Download PDFInfo
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- CN204967222U CN204967222U CN201520748962.5U CN201520748962U CN204967222U CN 204967222 U CN204967222 U CN 204967222U CN 201520748962 U CN201520748962 U CN 201520748962U CN 204967222 U CN204967222 U CN 204967222U
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- overflow means
- trip gear
- shunting device
- circuit current
- surge
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Abstract
The utility model discloses a backup protection structure, including overflowing device, trip gear, shunting device, overflow the device with bypass protection device parallel connection, the device drive overflows the trip gear action, the shunting device is used for releasing of surge energy, it is used for the response process to overflow the device overflow the short -circuit current of device, and drive the trip gear action, trip gear is used for driving contact switch motion, separates in the device follow electric wire netting with its protection.
Description
Technical field
The utility model embodiment relates to surge protection technology technology, particularly relates to a kind of overcurrent protection structure.
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 applied and 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, surge protector had Thermal protection and overcurrent protection two kinds of protective devices in use usually; thermel protection device is used for protecting lightning protection component deterioration heating; thermel protection device be generally integrated in surge protector originally with it; and overcurrent protective device is used for the lightning protection component puncture short that prevents transient over-current or overvoltage from causing; overcurrent protection is as a kind of backup protection mode of Thermal protection; generally realized by serial connection external device (ED), as adopted the protective device in support such as circuit breaker, fuse, RCD.But; these backup protection equipments design based on power frequency characteristic; there is no relevant surging technology performance index; when selecting; this often causes the performance of this surge protector and backup protection equipment not mate, and impact as existing backup protection equipment can not bear the surge matched with surge protector, both overall residual voltages exceed protected equipment withstand voltage; cannot realize mating with prime simultaneously, greatly reduce the fail safe in surge protector use and protectiveness.
Utility model content
The utility model provides a kind of backup protection structure, to realize and surge protector Performance Match, improves fail safe and the protectiveness of surge protector.
The utility model embodiment proposes a kind of backup protection structure, comprises overflow means, trip gear, shunting device, and described overflow means and described bypass protector are connected in parallel, and described overflow means drives described trip gear action,
Described shunting device is used for releasing of surge energy,
Described overflow means for responding to the short circuit current through described overflow means, and drives described trip gear action,
Described trip gear is for driving switch contacts action, and the device protected is separated from electrical network.
Further, described shunting device conducting surge current, not conducting short circuit current.
Further, described shunting device is the components and parts with voltage magnitude characteristic of switch, is beneficial to surge energy and releases;
Described overflow means is the components and parts with power frequency feature, is beneficial to power frequency short circuit current and passes through.
Further, described shunting device is piezo-resistance, discharge tube, TVS one or a combination set of;
Described overflow means is inductance type solenoid.
The utility model, by shunting device, realizes backup protection equipment and surge protector Performance Match, improves fail safe and the protectiveness of surge protector.
Accompanying drawing explanation
Fig. 1 is the structured flowchart in the utility model embodiment one;
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, illustrate only the part relevant to the utility model in accompanying drawing but not entire infrastructure.
Embodiment one
The structured flowchart that Fig. 1 provides for the utility model embodiment one; this structure comprises overflow means, trip gear, shunting device; this structure is used in backup protection equipment; described backup protection equipment is positioned at surge protector higher level and connects with surge protector; described backup protection equipment comprises overflow means, trip gear, shunting device, switch contacts, operating grip; described operating grip is positioned at normal position, and the dynamic/static contact of switch contacts contacts
Described overflow means and described shunting device are connected in parallel, and described overflow means drives described trip gear action,
Described shunting device is used for releasing of surge energy, described shunting device is the components and parts with voltage magnitude characteristic of switch, conducting surge current, not conducting short circuit current, described voltage magnitude characteristic of switch refers to when voltage reaches puncture voltage, its impedance declines rapidly, be conducive to releasing of surge energy, described shunting device is piezo-resistance, discharge tube, TVS one or a combination set of, preferably adopts gas-filled type discharge tube, as ceramic discharge tube, discharge voltage is 90-230V.
Described overflow means is for responding to the short circuit current through described overflow means, and drive described trip gear action, described overflow means is the components and parts with power frequency feature, and described power frequency is characterized as under surge condition, has high impedance, and under power frequency state, have little impedance, be beneficial to power frequency short circuit current and pass through, described overflow means is inductance type solenoid, the number of turn of inductance type solenoid is 5-20 circle, and being convenient to short circuit current just can action when lower.
Described trip gear is for driving switch contacts action; described trip gear is be arranged on the armature in described overflow means coil; when short circuit current flows through described overflow means; under the magnetomotive effect produced; armature promotes the moving contact in switch contacts; make it to separate with fixed contact, thus the surge protector be attached thereto is separated from electrical network, drive operating grip to get back to abort situation simultaneously.
When there is surge and invading, the described overflow means be connected in parallel and described shunting device, the residual voltage at its two ends raises rapidly, when its amplitude reaches the puncture voltage of shunting device, the impedance of shunting device declines rapidly, and surge energy is released by shunting device, thus achieve the transfer of surge energy, greatly reduce the surge energy that overflow means carries, improve the surge ability to bear of overflow means
When surge protector is short-circuited fault; the residual voltage amplitude of overflow means under short circuit current does not reach the puncture voltage of shunting device; shunting device can not be breakdown; still be high impedance status; short circuit current flows through from overflow means, and overflow means promotes coupled trip gear under the magnetomotive effect of this short circuit current, and trip gear drives switch contacts to disconnect; the surge protector of fault is separated from electrical network, protects the safety of system.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (4)
1. a backup protection structure, is characterized in that: comprise overflow means, trip gear, shunting device, and described overflow means and described bypass protector are connected in parallel, and described overflow means drives described trip gear action,
Described shunting device is used for releasing of surge energy,
Described overflow means for responding to the short circuit current through described overflow means, and drives described trip gear action,
Described trip gear is for driving switch contacts action, and the device protected is separated from electrical network.
2. a kind of backup protection equipment according to claim 1, is characterized in that: described shunting device conducting surge current, not conducting short circuit current.
3. a kind of backup protection equipment according to claim 1, is characterized in that:
Described shunting device is the components and parts with voltage magnitude characteristic of switch, is beneficial to surge energy and releases;
Described overflow means is the components and parts with power frequency feature, is beneficial to power frequency short circuit current and passes through.
4. a kind of backup protection equipment according to claim 3, is characterized in that:
Described shunting device is piezo-resistance, discharge tube, TVS one or a combination set of;
Described overflow means is inductance type solenoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520748962.5U CN204967222U (en) | 2015-09-16 | 2015-09-16 | Overcurrent protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520748962.5U CN204967222U (en) | 2015-09-16 | 2015-09-16 | Overcurrent protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967222U true CN204967222U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520748962.5U Active CN204967222U (en) | 2015-09-16 | 2015-09-16 | Overcurrent protection structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN204967222U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680412A (en) * | 2016-03-04 | 2016-06-15 | 常州东方铁路器材有限公司 | Intelligent self-reset over-current protector and working method thereof |
| CN106451335A (en) * | 2016-10-12 | 2017-02-22 | 武汉爱劳高科技有限责任公司 | SPD (surge protective device) back-up protector based on electromagnetic differential motion |
| CN108258654A (en) * | 2016-12-29 | 2018-07-06 | 上海海拉电子有限公司 | A kind of DC regulated converters and its control method |
-
2015
- 2015-09-16 CN CN201520748962.5U patent/CN204967222U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680412A (en) * | 2016-03-04 | 2016-06-15 | 常州东方铁路器材有限公司 | Intelligent self-reset over-current protector and working method thereof |
| CN105680412B (en) * | 2016-03-04 | 2018-03-20 | 常州东方铁路器材有限公司 | A kind of intelligent self-recovery overcurrent protector and its method of work |
| CN106451335A (en) * | 2016-10-12 | 2017-02-22 | 武汉爱劳高科技有限责任公司 | SPD (surge protective device) back-up protector based on electromagnetic differential motion |
| CN106451335B (en) * | 2016-10-12 | 2018-07-31 | 武汉爱劳高科技有限责任公司 | SPD back-up protection devices based on electromagnetic differential |
| CN108258654A (en) * | 2016-12-29 | 2018-07-06 | 上海海拉电子有限公司 | A kind of DC regulated converters and its control method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |