CN201118279Y - Electric power line wire breaking protecting multilevel switch device - Google Patents
Electric power line wire breaking protecting multilevel switch device Download PDFInfo
- Publication number
- CN201118279Y CN201118279Y CNU2007201129509U CN200720112950U CN201118279Y CN 201118279 Y CN201118279 Y CN 201118279Y CN U2007201129509 U CNU2007201129509 U CN U2007201129509U CN 200720112950 U CN200720112950 U CN 200720112950U CN 201118279 Y CN201118279 Y CN 201118279Y
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- switch
- line
- protection
- microprocessor
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- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A power line disconnection protection multi-stage switch device is arranged on a three-phase four-wire power line. A central manger (A) provided with the function of three-phase carrier wave communication and a switch (K <1-n>), which are arranged on a three-phase line, form a first-stage protection switch. A micro processor M provided with the function of single-phase carrier wave communication and a switch (QF), which are arranged on a single-phase line, form a second-stage protection switch. The two protection switches are connected for communication via power lines. An electric current detector (2) of the second-stage protection switch detects at any time the load current and the residual current of the single-phase line on which the switch is arranged, and transmits the signal to the second-stage micro processor. The signal is displayed in a display device of a key board, so relevant information is got. The central manager (A) of the device sends an inquiry directive to every secondary protection switch in a periodical and circulating way. If no response is got timely, the single-phase line of the branch can be judged to have problems. When the line is disconnected, the first-stage protection switch K will trip and sound an alarm automatically to have the function of complete and timely protection.
Description
Technical field
The utility model relates to a kind of power line earth leakage protective device, is to the power line carrier input and instructs the leakage switch protective device of break-make.
Background technology
The broken string of three-phase and four-line low-voltage circuit is not rarely seen, and strong wind, heavy snow, aging circuit all easily break, person poultry safety is waited cause a hidden trouble, and Luo Lu power line disconnection especially, suffering is more so.In recent years the residual current circuit breaker of applying can only be at the broken string generation earth current that contacts to earth, and this earth current value reach that online RCD sets specified operating value the time, trip protection.Unsettledly though break do not contact to earth or contact to earth but earth current does not reach specified operating value, do not shield.By retrieval, " intelligent earth-fault circuit breaker " patented technology of CN1815663A has overvoltage protection and auto-reset function, does not contact to earth and the residual stream unprotect function of Da Eding operating value not to hanging.In a word, to effectively protecting of low-voltage power line broken string, vacancy so far comprehensively.
The utility model content
The purpose of this utility model is at still not having complete in the prior art and effectively the low-voltage power line broken string being carried out under the situation of protection; design a kind of no matter break hang still contact to earth, earth current is greatly still little, all can be in time, the power line disconnection protection multiple-pole switch device of effectively protection.
The technical measures that realize above-mentioned purpose are: this power line disconnection protects multistage leakage switch device to be made up of the two large divisions, is installed on the three-phase and four-line power line, is installed in the centralized manager A and the K switch that have three-phase carrier communication function on the triple line
1-nForm the first class of protection switch, be installed in the microprocessor M and the switch QF that have single-phase carrier communication function on the phase line and form the second class protection switch, set up communication contact by power line between one-level and the second class protection switch.
In the said first class of protection switch; three modulator-demodulator WYT; having signal to receive line RX respectively is connected with multiway analog switch CD; reading transmission control line R/T is connected with decoder HC; there is the line of transmission TX to be connected with center microprocessor MCU; multiway analog switch CD and decoder HC have the line of reception respectively and read the transmission control line and be connected with the center microprocessor; multiway analog switch; decoder; there is interface line to connect between the microprocessor three of center; keyboard-display unit ZLG has clock line; data wire is connected with the center microprocessor, and the center output end of microprocessor meets variable connector K
1-n
In the said second class protection switch, a modulator-demodulator WYT is connected with terminal microprocessor MCU, and power supply 1, current detector 2, button 3 threes' output is connected with the input of terminal microprocessor, and the latter's output termination display 4 and switch 5 are QF.
The beneficial effects of the utility model are that this device is installed in the three-phase and four-line power line; in case break; no matter be in unsettled, the electric current that contacts to earth is big or little; can both detect by carrier signal instructs the switch of first class of protection switch in time to trip; obtain in time, effectively protection, prevent the get an electric shock generation of injures and deaths, electrical equipment damage and fire incident of people and animals.
Description of drawings
Fig. 1 is this multiple-pole switch device operation principle block diagram.
Fig. 2 is a device first class of protection switching circuit structured flowchart.
Fig. 3 is a device second class protection switching circuit structured flowchart.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and with reference to accompanying drawing: the first class of protection switch is located in the distribution box, is convenient to centralized management, and each second class protection switch is installed on the phase line.The parts of forming this device mostly are commercially available acquisition, and three modulator-demodulator related elements can be buied in the electronic market; Multiway analog switch buying CD4053 type, decoder is the 74HC139 type, the one-level K switch
1-n, keyboard-display unit ZLG all can be commercially available assembling obtain, center microprocessor MCU is according to the making of programming voluntarily of functions such as transmitting-receiving, coding and decoding, demonstration, button and switch control.The commercially available acquisition of switch QF of second class protection switch, terminal microprocessor MCU needs programming voluntarily to make by function.The K switch of first class of protection switch
1-n, adopt the asynchronous serial port communication between the centralized manager A, whole device can be selected the zero passage transmission technology, with the reliability that improves device with increase communication distance.
This installs when in running order; be installed in the current detector 2 in the second class protection switch on each branch's phase line; load current and the residual current of bearing uniline detect; and relevant information input terminal microprocessor MCU; through the carrier modulation demodulation; pass to center microprocessor MCU, on keyboard-display unit ZIG, show, just can make administrative staff obtain the operating voltage of these second class protection switch place phase line, when preload, preceding when leakage current or the like situation.The centralized manager A of this device regularly circulates and sends query statement to each second class protection switch; do not reply if obtain the second class protection switch at the appointed time; can judge that then faults such as broken string take place this road phase line; the just automatic trip of K switch in the first class of protection switch, warning are played comprehensively, protective effect timely.
This device especially is fit to and the residual current circuit breaker combination; on the earth leakage protective basis of using always; increased the broken string defencive function; no matter unsettled when broken string still contacted to earth; or the earth current that takes place of contacting to earth is greatly or little; or not reaching specified operating value, the switch in the first class of protection switch can both trip protection, has enlarged the earth leakage protective scope.
In the second class protection switch of this device, can consider to be provided with all kinds of function of residual current circuit breaker.
Claims (3)
1, a kind of power line disconnection protection multiple-pole switch device, it is made up of the two large divisions, is installed on the three-phase and four-line power line, it is characterized in that being installed in the centralized manager (A) and the switch (K that have three-phase carrier communication function on the triple line
1-n) form the first class of protection switch, be installed in the microprocessor (M) and the switch (QF) that have single-phase carrier communication function on the phase line and form the second class protection switch, set up communication contact by power line between the two.
2; power line disconnection protection multiple-pole switch device as claimed in claim 1; it is characterized in that in the said first class of protection switch; three modulator-demodulators (WYT); having signal to receive line (RX) respectively is connected with multiway analog switch (CD); reading transmission control line (R/T) is connected with decoder (HC); there is transmission line (TX) to be connected with center microprocessor (MCU); multiway analog switch (CD) and decoder (HC) have the line of reception respectively and read the transmission control line and be connected with the center microprocessor; multiway analog switch; decoder; there is interface line to connect between the microprocessor three of center; keyboard-display unit (ZLG) has clock line; data wire is connected with the center microprocessor, and the center output end of microprocessor meets variable connector (K
1-n).
3, power line disconnection protection multiple-pole switch device as claimed in claim 1; it is characterized in that in the said second class protection switch; a modulator-demodulator (WYT) is connected with terminal microprocessor (MCU); power supply (1), current detector (2), button (3) three's output is connected with the input of terminal microprocessor, the latter's output termination display (4) and switch (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201129509U CN201118279Y (en) | 2007-08-07 | 2007-08-07 | Electric power line wire breaking protecting multilevel switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201129509U CN201118279Y (en) | 2007-08-07 | 2007-08-07 | Electric power line wire breaking protecting multilevel switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118279Y true CN201118279Y (en) | 2008-09-17 |
Family
ID=39992870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201129509U Expired - Fee Related CN201118279Y (en) | 2007-08-07 | 2007-08-07 | Electric power line wire breaking protecting multilevel switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201118279Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470378A (en) * | 2020-03-02 | 2020-07-31 | 张冬 | Wire stretcher comprehensive protection method and comprehensive protection device |
-
2007
- 2007-08-07 CN CNU2007201129509U patent/CN201118279Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470378A (en) * | 2020-03-02 | 2020-07-31 | 张冬 | Wire stretcher comprehensive protection method and comprehensive protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20100807 |