CN101582581B - Electricity leakage-prevention and overcurrent protection device - Google Patents

Electricity leakage-prevention and overcurrent protection device Download PDF

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Publication number
CN101582581B
CN101582581B CN2008101424227A CN200810142422A CN101582581B CN 101582581 B CN101582581 B CN 101582581B CN 2008101424227 A CN2008101424227 A CN 2008101424227A CN 200810142422 A CN200810142422 A CN 200810142422A CN 101582581 B CN101582581 B CN 101582581B
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unit
detection
control execution
output control
branch road
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CN101582581A (en
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韩俊
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韩俊
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Abstract

The invention relates to an electricity leakage-prevention and overcurrent protection device. The device comprises a power source input unit A, an output control execution unit Z, an electricity leakage detection unit K and an overcurrent detection unit M which are respectively connected in series with the electricity leakage detection units C1-Cn, the overcurrent detection units D1-Dn and the output control execution units H1-Hn of each branch circuit, wherein the electricity leakage detection units C1-Cn, the overcurrent detection units D1-Dn and the output control execution units H1-Hn of each branch circuit are connected in parallel; a DC power source unit E is respectively connected with an earth detection unit B and a microcontrol unit F; and the microcontrol unit F is respectively connected with the earth detection unit B, the electricity leakage detection units C1-Cn, the overcurrent detection units D1-Dn, the output control execution units H1-Hn, the output control execution unit Z, the electricity leakage detection unit K and the overcurrent detection unit M.

Description

The device of anticreep, overcurrent protection
Technical field
The present invention relates to a kind of anticreep, overcurrent protective device.
Background technology
CN93247465.9 has announced a kind of " the omnipotent protector of electricity consumption "; Its purpose provides and a kind ofly on the basis of former serial earth leakage protective device, increases few components; Improve the circuit and the structure of former earth leakage protective device; Improve its performance, increase protection range, the omnipotent protector of electricity consumption of anticreep, protection against electric shock, anti-overvoltage, anti-overflow, anti-thunderbolt, anti-short circuit.Its technical scheme: the power supply of the omnipotent guarantor of said electricity consumption Shanghai device at first passed through the moving protector (RJ) of rated current heat; Make it carry out overcurrent protection; In the detection loop of former earth leakage protective device and connect suitable lightning protection piezo-resistance (RV) and in by the protection power line, be connected to the discharger (G) of discharge over the ground; Seal in suitable current-limiting resistance (R4) for carrying out itself protecting at controllable silicon (SCR) anode; 220 volts of voltages, the characteristic of the omnipotent protector of civil version electricity consumption is: (1) .220 volt live wire (1) moves protector (RJ) back to the electricity consumption power supply through overcurrent heat; (2). lightning protection piezo-resistance (Rv) two limbs lead-in wires is attempted by respectively and detects loop (a) and (b) point, and its nominal voltage is 390 volts.(3). be connected to discharger (G) between protected power line and ground wire; (4) be connected in series current-limiting resistance (R4) between the anode of controllable silicon (SCR) and its power supply.
The characteristic of 38 volts of three-phase and four-line types of the omnipotent protector of electricity consumption is: (1) N line (a) point to (A) (B) (C) line (b) (c) (d) point take over control thunder piezo-resistance (Rv) respectively, its nominal voltage is 390 volts.(2) 380 volts of power supplys passed through the device entering quilt protection power supply that the moving protector (RJ) of volume electrical current heat is threaded off.
The omnipotent protector of electricity consumption, the characteristic of 380 volts of phase three-wire three types is: two lightning protection piezo-resistances (RV), through (a) point of (C) line, stride across zero sequence current mutual inductor (B) and be connected on (b) point of (A) line and (B) (c) point of line respectively, its nominal voltage is 680 volts.Its weak point is:
(1) can not detect the ground wire connection status, well-known, leakage current only just can embody in loop of electric leakage; Have only ground wire to exist when perhaps other conductor connects as ground connection; Electric leakage is showed, also have only in this case, just might carry out earth leakage protective.
(2) all leakage switch in case detect electric leakage, at first are this switch trip all as master switch, deenergization, thus the power supply of other branch road is also broken off, influence the normal electricity consumption of other branch road, make troubles for the electricity consumption of other branch road.
(3) leakage switch of all mechanical dropout types, it is threaded off and all receives the influence of its tripping coil and actuating mechanism.Unsuitable design action time gate-controlled switch, more difficulty satisfies the branch road action, and the master switch hysteresis is judged and action.
(4) also the useful time relay is delayed time, but its operation inconvenience, the user is more difficult to hold.
Present on the market switch control box, its goal of the invention is: improve the circuit and the structure of former earth leakage protective device, improve its performance, increase protection range, the omnipotent protector of electricity consumption of anticreep, protection against electric shock, anti-overvoltage, anti-overflow, anti-thunderbolt, anti-short circuit; Its weak point is:
(1). when earth connection does not have connection or ground connection connection failure; Even electric leakage appears in branch road, leakage switch also differs and trips surely, and this moment is when having only human body or other conductor as conductive equipment ground connection; Leakage switch could trip normally; Any tripping operation all has certain detection and operate time, if human body can cause certain injury to human body as conductor at this moment.
(2). leakage switch all is to use as master switch, connects each branch road again thereafter, but in case electric leakage appears in a certain branch road; Leakage switch can trip, and can cut off all power supplys this moment, influences the normal power supply of other branch road; If at night, must be used as illumination by the power supply of other form, get rid of this problem; If in the Office Area, can influence the safety utilization of electric power of other branch road.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point of the prior art, a kind of effective solution cable grounding safety problem is provided; Can normally detect the ground wire connection status; Under the ground connection good state; The power supply that very first time of electric leakage just can break off leak electricity branch road or equipment taking place, do not need the third party as earthing conductor, human body and equipment is played the device of anticreep, the overcurrent protection of timely protective effect.Another purpose of the present invention provides a kind of protective device or switch control box of being made up of the multichannel more than a tunnel or a tunnel; Anticreep action between its master switch and each branch road keeps the regular hour poor, both will lag behind each branch road time the operate time of master switch, like this; When a certain branch road electricity consumption generation leak current fault, this branch road is deenergization at first, and does not influence the power supply of overall power supply; Can keep other branch road to supply power normally, especially power supply, test block power supply in the Office Area; And dwelling house electricity consumption in evening all has good protective effect; Just neither influence the power supply of other branch road, the power supply that also can utilize other branch road is as illumination, and the power consumption equipment and the electrical equipment of this branch road is perhaps handled in maintenance.
The object of the invention can reach through following measure:
The device of this anticreep, overcurrent protection; Said device anticreep, overcurrent protection comprises power input unit A, output control execution unit Z, detection of electrical leakage unit K, crosses electro-detection unit M; Micro-control unit F respectively with ground connection detecting unit B, detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and be connected, its special character is: said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with detection of electrical leakage unit C1~Cn, the over-current detection unit D1~Dn of each branch road, export between control execution unit H1~Hn and connect; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, over-current detection unit D1~Dn, the output control execution unit H1~Hn; DC power source unit E is connected with ground connection detecting unit B, micro-control unit F respectively.
When detection of electrical leakage unit K finds that when the leakage current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among C1~Cn, cut off out-put supply.
When the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K still finds that also this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
The object of the invention can also reach through following measure:
The device of this anticreep, overcurrent protection; Said device anticreep, overcurrent protection comprises power input unit A, output control execution unit Z, detection of electrical leakage unit K, crosses electro-detection unit M; Micro-control unit F is respectively with ground connection detecting unit B, overcurrent protection detecting unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, electro-detection unit M is connected excessively; Its special character is: said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with over-current detection unit D1~Dn, the output control execution unit H1~Hn of each branch road, between series connection; Parallel connection between the overcurrent protection detecting unit D1~Dn of each branch road, the output control execution unit H1~Hn; DC power source unit E is connected with ground connection detecting unit B, micro-control unit F respectively.
The object of the invention can also reach through following measure:
The device of this anticreep, overcurrent protection, said device anticreep, overcurrent protection comprise power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M, and DC power source unit E is connected with micro-control unit F; Micro-control unit F respectively with detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and be connected, its special character is: said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with detection of electrical leakage unit C1~Cn, the over-current detection unit D1~Dn of each branch road, export between control execution unit H1~Hn and connect; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, overcurrent protection detecting unit D1~Dn, the output control execution unit H1~Hn.
When detection of electrical leakage unit K finds that when the leakage current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among C1~Cn, cut off out-put supply.
When the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K finds that still this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
The present invention compares prior art, has following advantage:
1, the present invention is provided with the detection of ground connection connection status, guarantees the fail safe of electricity consumption.
2, the present invention can accomplish bus switch and each branch switch timesharing action; Both occurred when unusual detecting branch road, when surpassing set point or load current and surpass set point like leakage current, first disconnected branches power supply; Both at first broken off the obstacle source; And not influencing the normal power supply of other branch road, when still not having queueing problem like disconnected branches, master switch breaks off the effect of strengthening protection to play once more.
Description of drawings
Fig. 1 is the block diagram of first kind of circuit structure of the present invention.
Fig. 2 is the physical circuit schematic diagram of Fig. 1.
Fig. 3 is the block diagram of second kind of circuit structure of the present invention.
Fig. 4 is the physical circuit schematic diagram of Fig. 3.
Fig. 5 is the block diagram of the third circuit structure of the present invention.
Fig. 6 is the physical circuit schematic diagram of Fig. 5.
Embodiment
The present invention below will combine accompanying drawing to do further to detail:
Fig. 1, Fig. 2 show first embodiment of the present invention.
See also shown in Figure 1; This is anticreep, the device of overcurrent protection; Comprise power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M, said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and connect respectively with between the detection of electrical leakage unit C1~Cn of each branch road, over-current detection unit D1~Dn, the output control execution unit H1~Hn; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, over-current detection unit D1~Dn, the output control execution unit H1~Hn; DC power source unit E is connected with ground connection detecting unit B, micro-control unit F respectively; Micro-control unit F is respectively with ground connection detecting unit B, detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, electro-detection unit M is connected excessively.
When ground connection detecting unit B found that ground wire is in improper connection status, F sent signal through micro-control unit, carried out control execution unit Z, cut off out-put supply.
When detection of electrical leakage unit K finds that when the leakage current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among C1~Cn, cut off out-put supply.
Find that when detecting when the electric current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among over-current detection unit D1~Dn, cut off out-put supply.
When the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K still finds that also this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
When the overcurrent of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when electro-detection unit M finds also that still being somebody's turn to do electricity does not also eliminate excessively; Carry out output control execution unit Z, cut off out-put supply.
See also shown in Figure 2ly, the physical circuit principle of Fig. 1 is following: A is as the input power supply, provide K, M, B, C1~Cn, D1~Dn, sensed signal sources, A connects master switch Z and switch H1~Hn; Detection signal unit K, M, C1~Cn, D1~Dn are transferred to the detection current potential of the corresponding port of micro-control unit F, as the control foundation of micro-control unit; B offers the detection level of the corresponding port of micro-control unit F, as the control foundation of micro-control unit; E offers the work and the operating power of B, F unit.
Fig. 3, Fig. 4 show second embodiment of the present invention.
See also shown in Figure 3; This is anticreep, the device of overcurrent protection; Comprise power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M; Said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with over-current detection unit D1~Dn, the output control execution unit H1~Hn of each branch road, between series connection; Parallel connection between the overcurrent protection detecting unit D1~Dn of each branch road, the output control execution unit H1~Hn; DC power source unit E is connected with ground connection detecting unit B, micro-control unit F respectively; Micro-control unit F is respectively with ground connection detecting unit B, overcurrent protection detecting unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, electro-detection unit M is connected excessively.
When ground connection detection found that ground wire is in improper connection status, F sent signal through micro-control unit, carried out output control execution unit Z, cut off out-put supply.
Find that when detecting when the electric current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among over-current detection unit D1~Dn, cut off out-put supply.
When the overcurrent of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when crossing electro-detection unit M and finding that still this is crossed electricity and does not also eliminate; Carry out output control execution unit Z, cut off out-put supply.
See also shown in Figure 4ly, the physical circuit principle of Fig. 3 is following: A is as the input power supply, provide K, M, B, D1~Dn, sensed signal sources, A connects master switch Z, and switch H1~Hn; Detection signal unit K, M, D1~Dn are transferred to the detection current potential of the corresponding port of micro-control unit F, as the control foundation of micro-control unit; B offers the detection level of the corresponding port of micro-control unit F, as the control foundation of micro-control unit; E offers the work and the operating power of B, F unit.
Fig. 5, Fig. 6 show the 3rd embodiment of the present invention.
See also shown in Figure 5; This is anticreep, the device of overcurrent protection; Comprise power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M, said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and connect respectively with between the detection of electrical leakage unit C1~Cn of each branch road, over-current detection unit D1~Dn, the output control execution unit H1~Hn; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, overcurrent protection detecting unit D1~Dn, the output control execution unit H1~Hn; DC power source unit E is connected with micro-control unit F; Micro-control unit F is respectively with detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, electro-detection unit M is connected excessively.
When detection of electrical leakage unit K finds that when the leakage current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among C1~Cn, cut off out-put supply.
Find that when detecting when the electric current of any branch road was greater than or equal to set point, the output control execution unit Hn of this branch road broke off this branch road among over-current detection unit D1~Dn, cut off out-put supply.
When the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K finds that still this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
When the overcurrent of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when crossing electro-detection unit M and finding that still this is crossed electricity and does not also eliminate; Carry out output control execution unit Z, cut off out-put supply.
See also shown in Figure 6ly, the physical circuit principle of Fig. 5 is following: A is as the input power supply, provide K, M, C1~Cn, D1~Dn, sensed signal sources, A connects master switch Z, and switch H1~Hn; Detection signal unit K, M, C1~Cn, D1~Dn are transferred to the detection current potential of the corresponding port of micro-control unit F, as the control foundation of micro-control unit; E offers the work and the operating power of F unit.
The above is merely preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.

Claims (2)

1. the device of anticreep a, overcurrent protection; Said device anticreep, overcurrent protection comprises power input unit A, output control execution unit Z, detection of electrical leakage unit K, crosses electro-detection unit M; Micro-control unit F respectively with ground connection detecting unit B, detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and be connected, said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with detection of electrical leakage unit C1~Cn, the over-current detection unit D1~Dn of each branch road, export between control execution unit H1~Hn and connect; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, over-current detection unit D1~Dn, the output control execution unit H1~Hn; DC power source unit E is connected with ground connection detecting unit B, micro-control unit F respectively; It is characterized in that: when the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K still finds that also this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
2. the device of anticreep a, overcurrent protection; Said device anticreep, overcurrent protection comprises power input unit A, output control execution unit Z, detection of electrical leakage unit K, crosses electro-detection unit M; Micro-control unit F respectively with detection of electrical leakage unit C1~Cn, over-current detection unit D1~Dn, output control execution unit H1~Hn, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M and be connected, said power input unit A, output control execution unit Z, detection of electrical leakage unit K, cross electro-detection unit M respectively with detection of electrical leakage unit C1~Cn, the over-current detection unit D1~Dn of each branch road, export between control execution unit H1~Hn and connect; Parallel connection between the detection of electrical leakage unit C1~Cn of each branch road, overcurrent protection detecting unit D1~Dn, the output control execution unit H1~Hn; DC power source unit E is connected with micro-control unit F; It is characterized in that: when the leakage current of any branch road is greater than or equal to set point; The output control execution unit Hn of this branch road breaks off this branch road; After cutting off out-put supply, in the time of setting, when detection of electrical leakage unit K finds that still this electric leakage is not also eliminated; Carry out output control execution unit Z, cut off out-put supply.
CN2008101424227A 2008-08-14 2008-08-14 Electricity leakage-prevention and overcurrent protection device Expired - Fee Related CN101582581B (en)

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CN103425544A (en) * 2013-08-19 2013-12-04 浪潮电子信息产业股份有限公司 Method for solving fan electrification maintenance
CN104682345A (en) * 2013-11-28 2015-06-03 国家电网公司 Leakage protecting circuit and leakage protecting method for circuit
CN104201648A (en) * 2014-09-15 2014-12-10 福建通用同溢电气有限公司 New distribution connection method and device
CN105896466A (en) * 2016-05-30 2016-08-24 株洲中车时代电气股份有限公司 Ground protection device and ground protection method of train assistant system
CN106648013A (en) * 2016-09-28 2017-05-10 华为技术有限公司 Overcurrent point configuration method and apparatus, and overcurrent protection apparatus
CN106329471A (en) * 2016-10-20 2017-01-11 常州尼诺光电科技有限公司 Automatic restorable leakage protection circuit breaker and working method thereof

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CN2739855Y (en) * 2004-09-23 2005-11-09 骆德昌 Arcless digital protector
CN1901313A (en) * 2006-07-21 2007-01-24 柳州市腾龙信息科技有限公司 Method for selective leakage protection of electric feeding switch protector
CN101179187A (en) * 2007-08-24 2008-05-14 韩俊 Power utilization security protection switch and control method thereof

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Publication number Priority date Publication date Assignee Title
CN2739855Y (en) * 2004-09-23 2005-11-09 骆德昌 Arcless digital protector
CN1901313A (en) * 2006-07-21 2007-01-24 柳州市腾龙信息科技有限公司 Method for selective leakage protection of electric feeding switch protector
CN101179187A (en) * 2007-08-24 2008-05-14 韩俊 Power utilization security protection switch and control method thereof

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