CN203352153U - TT system voltage displacement protecting apparatus - Google Patents
TT system voltage displacement protecting apparatus Download PDFInfo
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- CN203352153U CN203352153U CN 201320389188 CN201320389188U CN203352153U CN 203352153 U CN203352153 U CN 203352153U CN 201320389188 CN201320389188 CN 201320389188 CN 201320389188 U CN201320389188 U CN 201320389188U CN 203352153 U CN203352153 U CN 203352153U
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- protective device
- fuse
- leakage protector
- earth leakage
- live wire
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Abstract
The utility model relates to a TT system voltage displacement protecting apparatus. The protecting apparatus comprises a leakage protector, a first fuse, and a first relay set. A first live wire terminal of the leakage protector is connected to a current relay set and a time relay set through a second fuse. A second live wire terminal and a third live wire terminal of the leakage protector are respectively and sequentially connected with second fuses, knife switches, and relay coils. A zero line terminal of the leakage protector is connected with an alarm unit. The apparatus is small in size, convenient to install, and easy to operate, and is characterized by acousto-optic alarm and high safety performance. A user can effectively guarantee the life, property, and equipment safety under a TT system line only by leading and connecting a plurality of signal lines in a switchgear room general leakage protector under the TT system line.
Description
Technical field
The utility model relates to TT system voltage displacement protecting device.
Background technology
Along with China's rapid development of economy, power consumption increases very fast, and electricity consumption client's power consumption equipment capacity is large, kind is many, it is high to be worth.The generation electric energy that electric power system is comprised of power-supply system and electrical power trans mission/distribution system and by power delivery the system to power consumption equipment.Rural area low-voltage comprehensive distribution transforming adopts the TT system, once system zero-line failure occurs the TT system, electric voltage displacement and distortion will occur, household electrical appliance to the electricity consumption client form grave danger, and power supply enterprise need to pay economic compensation to the equipment burnt because of overvoltage, even has legal dispute.The phenomenon of burning household electrical appliance is being ascendant trend year by year, gets rid of zero line hidden danger extremely urgent.
TT system synthesis distribution transforming circuit (emphasis is in the rural area scope) does not allow to arrange the multiple spot iterative earthing, once system zero-line failure occurs, electric voltage displacement and distortion will occur, and forms grave danger to electricity consumption client's household electrical appliance.The phenomenon of burning household electrical appliance because of the neutral line break fault in recent years is being ascendant trend year by year, gets rid of zero line hidden danger extremely urgent.When threephase load is asymmetric, transformer neutral point produces displacement, can cause the three-phase voltage distorted, causes each phase voltage to have height to have low, and power consumption equipment is caused to very large harm.The zero line that we run into breaks down in accident, and the little phase voltage of loading can be brought up to 290V, has substantially exceeded the rated voltage of power consumption equipment.And the large phase voltage of loading is reduced to 110-150V, make incandescent lamp rubescent, TVs etc. can not start.If the phase line shorted to earth has occurred again in the neutral line break accident, the neutral point displacement meeting is larger.If the neutral line break accident occurs in the low pressure zero connection protection, just equal electric equipment and lost safeguard measure, once the electric leakage of electric equipment insulation damages, human body touches shell will cause the human electric shock, does not have due protective effect.
Summary of the invention
In order to solve at TT system power circuit generation electric voltage displacement, the neutral line break fault, performance is cut off the electricity supply in time, the effect of avoiding power consumption equipment to raise and burn because of voltage, the utility model provides a kind of TT system voltage displacement protecting device.
The purpose of this utility model is achieved through the following technical solutions:
TT system voltage displacement protecting device; this protective device comprises earth leakage protective device, the first fuse and the first relay group; the first live wire end of described earth leakage protective device connects current relay group and time relay group through the second fuse; the second and the 3rd live wire end of described earth leakage protective device is connected with respectively the second fuse, disconnecting link and relay coil in turn, and the zero line side of described earth leakage protective device is connected with alarm unit.
Described alarm unit is alarm lamp, auxiliary relay and the A.C. contactor connected successively.
The utility model has the advantage of:
The utility model design, the user only need to the total earth leakage protective device of the switchgear house place under the TT system line draws and connects several signal line and both can effectively guarantee lives and properties and the device security under circuit.
1. economic worth
2000 yuan of left and right of market complete set of equipments price, approximately 180 yuan of improvement costs, calculate with the 60Ge Tai district, and the cost of saving is: (2000-180) * 60=109200 unit.If this achievement can be applied in larger scope, the economic benefit of bringing can be huger.
2. apparatus value
Captured the technical barrier of original earth leakage protective device deficient function, in the situation that do not change the existing equipment structure, expanded functions of the equipments, realized the electric voltage displacement protection, guaranteed neutral line break after client's power consumption equipment can occurrence of large-area not burn.
3. social value
Reduced economic compensation and the legal dispute of power supply enterprise because of equipment overvoltage burnout failure, its potential economic worth can't be estimated.Improve power supply reliability, increase customer satisfaction, promote power supply enterprise's image.
4. promotional value
This cover protective device energy extension device useful life, reduce interruption duration, reduces economic dispute, reduces a large amount of manpower and materials and expend, if the potential economic benefit that these benefits of summation are brought and value are immeasurable, has practicality; This complete equipment can also be saved man-hour, increases coefficient of safety, increases economic efficiency, and captures the technical barrier of research and development new equipment, and very high promotional value is arranged.
The accompanying drawing explanation
Fig. 1: the utility model structure principle chart.
Embodiment
Be illustrated in figure 1 the utility model structure principle chart; TT system voltage displacement protecting device comprises earth leakage protective device, the first fuse and the first relay group; the first live wire end of described earth leakage protective device connects current relay group and time relay group through the second fuse; the second and the 3rd live wire end of described earth leakage protective device is connected with respectively the second fuse, disconnecting link and relay coil in turn, and the zero line side of described earth leakage protective device is connected with alarm unit.Described alarm unit is alarm lamp, auxiliary relay and the A.C. contactor connected successively.
Before earth leakage protective device puts into operation; press SB2; now time relay KT, A.C. contactor KA1, KA2, KA3, KA7 put into operation simultaneously; KA1, KA2, KA3 dynamic circuit breaker are opened; ground connection PE line disconnects; earth leakage protective device closes; DZ1, DZ2, DZ3 close simultaneously; relay K M1, KM2, KM3 enter respectively the detection running status; relay K M1, KM2, KM3 break contact are opened; (now the time relay is set as resetting in 2 minutes) KA1, KA2, the KA3 dynamic circuit breaker closure that resets, earth connection PE presents KM1, KM2, KM3 break contact open mode.Circuit and equipment bringing normally into operation in protected form.
When circuit generation electric voltage displacement (such as neutral line break, zero line and the swinging cross of phase line overlap joint, the situations such as zero line loose contact), DZ1, DZ2, DZ3 voltage assists action when surpassing its setting value to disconnect, disconnect respectively KM1 simultaneously, KM2, KM3, KM1 now, KM2, the KM3 break contact becomes closure state earth connection PE continuous earth, earth leakage protective device moved and disconnects the low-voltage circuit power supply in 0.4 second, KA4 now, KA5, KA6 obtains electric operation, KM4 obtains electric operation, the same alarm of warning device acousto-optic, standby zero line puts into operation, prevent from closing earth leakage protective device by mistake, make line facility cause the secondary burnout failure, (circuit obtains the qualified voltage in standby zero line loop, even the misoperation operation is arranged, all can realize repeating outage at 0.4 second with interior circuit, so the danger that has prevented secondary device to burn), DZ1, DZ2, DZ3 is hand gear, so circuit can't automatic recovery of power supply before there is no handling failure.
The present invention design, the user only need to the total earth leakage protective device of the switchgear house place under the TT system line draws and connects several signal line and both can effectively guarantee lives and properties and the device security under circuit.
This is the device of a set of cooperation earth leakage breaking protector work, has enlarged the function that earth leakage protective can not be cut off the electricity supply when electric voltage displacement, and this apparatus structure is small and exquisite, easy for installation, simple to operate, has sound and light alarm and security performance high.
Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art modifies reading the technical scheme that can put down in writing each embodiment on the basis of specification of the present invention, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (2)
1.TT system voltage displacement protecting device; it is characterized in that; this protective device comprises earth leakage protective device, the first fuse and the first relay group; the first live wire end of described earth leakage protective device connects current relay group and time relay group through the second fuse; the second and the 3rd live wire end of described earth leakage protective device is connected with respectively the second fuse, disconnecting link and relay coil in turn, and the zero line side of described earth leakage protective device is connected with alarm unit.
2. TT system voltage displacement protecting device according to claim 1, is characterized in that, described alarm unit is alarm lamp, auxiliary relay and the A.C. contactor connected successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320389188 CN203352153U (en) | 2013-07-02 | 2013-07-02 | TT system voltage displacement protecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320389188 CN203352153U (en) | 2013-07-02 | 2013-07-02 | TT system voltage displacement protecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352153U true CN203352153U (en) | 2013-12-18 |
Family
ID=49752004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320389188 Expired - Lifetime CN203352153U (en) | 2013-07-02 | 2013-07-02 | TT system voltage displacement protecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203352153U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144748A (en) * | 2017-06-02 | 2017-09-08 | 重庆大学 | The Earthing Reliability monitoring method and its system of TT systems based on Injection Signal |
| CN109038480A (en) * | 2018-07-05 | 2018-12-18 | 国网浙江省电力有限公司温州市洞头区供电公司 | A kind of neutral point drifting protective device |
-
2013
- 2013-07-02 CN CN 201320389188 patent/CN203352153U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144748A (en) * | 2017-06-02 | 2017-09-08 | 重庆大学 | The Earthing Reliability monitoring method and its system of TT systems based on Injection Signal |
| CN107144748B (en) * | 2017-06-02 | 2019-09-10 | 重庆大学 | The Earthing Reliability monitoring method and its system of TT system based on Injection Signal |
| CN109038480A (en) * | 2018-07-05 | 2018-12-18 | 国网浙江省电力有限公司温州市洞头区供电公司 | A kind of neutral point drifting protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |
|
| CX01 | Expiry of patent term |