CN101685959A - Electrical intelligent fire disaster protector - Google Patents
Electrical intelligent fire disaster protector Download PDFInfo
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- CN101685959A CN101685959A CN200810143010A CN200810143010A CN101685959A CN 101685959 A CN101685959 A CN 101685959A CN 200810143010 A CN200810143010 A CN 200810143010A CN 200810143010 A CN200810143010 A CN 200810143010A CN 101685959 A CN101685959 A CN 101685959A
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Abstract
The invention relates to an electrical intelligent fire disaster protector. A main loop is divided into a main circuit power end and a main circuit load end by connecting a high-power lockup relay inthe middle of the main loop in series, and the on-off and the fault cut-off of the high-power lockup relay are completely controlled by a locking and controlling circuit. A sampling end of a voltage previewing and on-line detection protecting circuit is connected to a transformation rectifier filter circuit of the power end, and an outlet end is connected to the locking and controlling circuit. The sampling ends of a reverse power previewing and protecting circuit, a short circuit overcurrent previewing and protecting circuit, an electricity leakage previewing and on-line preview protecting circuit and a short circuit overcurrent on-line protecting circuit are all connected to the main circuit load end, and the output ends are all connected to the locking and controlling circuit. The electrical intelligent fire disaster protector has various functions of detection before power transmission, on-line detection after powering on, and the like, extremely small previewing short circuit resistance and leakage current, outstanding protecting performance, high sensitivity and good technical performance, prevents fire disasters caused by electrical faults such as electrical short circuits,electricity leakage, overvoltage, and the like, and solves the technical problem of the butt joint of strong current and weak current, alternating current and direct current, high frequency and low frequency as well as high voltage and low voltage.
Description
Technical field:
The present invention relates to a kind of electrical safety protector, be specifically related to a kind of electrical intelligent fire disaster protector.Have and stride forceful electric power and light current, exchange and multiple functions such as concrete malfunction, sound and light alarm are informed in send preliminary examination electric short circuit before the electricity, overcurrent, overvoltage, electric leakage, contrary merit fault, energising cycle detection electric fault in service, locking, the indication of direct current, high frequency and low frequency, high pressure and low pressure.
Background technology:
Existing electric switch does not generally have Based Intelligent Control; both having made has the protection of Based Intelligent Control equipment also bigger because of the preliminary examination short-circuit resistance individually; more than 3 Ω; the preliminary examination leakage current is bigger, more than the 100mA, thereby short circuit preliminary examination wrong report often occurs and leaks electricity phenomenon such as do not report on fire; the security protection performance is poor; and circuit complexity, cost are too high, therefore do not have practical exploitation and are worth.
Summary of the invention:
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists, and provide a kind of have multiple functions such as sending preliminary examination before the electricity, the energising online detection in back, preliminary examination short-circuit resistance minimum with leakage current, prevent electric fault initiation fires such as electric short circuit, electric leakage, overvoltage, solve forceful electric power and light current, exchange and the electrical intelligent fire disaster protector of direct current, high frequency and low frequency, high pressure and a low pressure docking technique difficult problem, highly sensitive, technological performance.
The technical solution used in the present invention is: major loop is middle be divided into main circuit power end and main circuit load end because of high-power latching relay is serially connected in, the switching of high-power latching relay and fault are cut off and are locked fully, the control of control circuit, locking, control circuit are also controlled indication and are informed circuit and warning circuit, and the input of transformation current rectifying and wave filtering circuit is connected to the main circuit power end; The online inspection protection circuit of voltage preliminary examination and voltage sampling end is connected to the transformation rectification filter circuit output end, the online inspection protection circuit of voltage preliminary examination and voltage is connected and composed by bleeder circuit and voltage stabilizing didoe, bleeder circuit connects the transformation rectification filter circuit output end, carry out voltage sampling, the other end is connected on the first SCR control utmost point of locking, control circuit, first controllable silicon is serially connected in second relay circuit of locking, control circuit, and the second control relay circuit working power break-make; And the sampling end of contrary merit preliminary examination protection circuit, short circuit overcurrent preliminary examination protection circuit, electric leakage preliminary examination and the online inspection protection circuit of electric leakage, the online inspection protection circuit of short circuit overcurrent all is connected on the main circuit load end, its output of these circuit all connects locking, control circuit, the sampling end of self-checking circuit is the self check knob, and output also connects locking, control circuit.
Contrary merit preliminary examination protection circuit is connected and composed by the rectification circuit and first relay, two inputs of rectification circuit are connected across respectively on main circuit power end zero line and the main circuit load end zero line, rectification circuit two outputs connect first relay, the conversion of first relay contact, cut off locking, control circuit rear section working power, and triggering locks, the 5th controllable silicon of control circuit, and the 5th controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
Short circuit, overcurrent preliminary examination protection circuit sampling end connect the 7th SCR control utmost point, and the 7th controllable silicon anode connects the 6th SCR control utmost point, and the 6th controllable silicon is serially connected in second relay circuit of control circuit working power break-make;
Electric leakage preliminary examination and the online inspection protection circuit of electric leakage are by hypersensitive zero sequence current mutual inductor and diode, potentiometer constitutes, the hypersensitive zero sequence current mutual inductor is installed in the live wire of main circuit load end, on the zero line, the hypersensitive zero sequence current mutual inductor is that common zero sequence current mutual inductor increases by an elementary winding, this elementary winding one end connects main circuit load end live wire, the other end connects on the transformer secondary output winding of main circuit power end, the secondary output of hypersensitive zero sequence current mutual inductor triggers locking behind diode, second controllable silicon of control circuit, and second controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
Short circuit, the online inspection protection circuit of overcurrent are connected and composed by current transformer, diode, capacitance-resistance filter regulating circuit, voltage stabilizing didoe, current transformer is installed on the main circuit load end live wire, the secondary output of current transformer is behind diode, capacitance-resistance filter regulating circuit, voltage stabilizing didoe, be connected to the 3rd SCR control plate of locking, control circuit, and the 3rd controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
Locking, control circuit comprise first to the 6th controllable silicon and diode thereof, second to the 6th relay, integrated circuit (IC)
2And peripheral circuit, the first and second two triodes, the 8th and the 9th controllable silicon, and resistance, electric capacity; Second relay upper end connects the working power anode of transformation current rectifying and wave filtering circuit output, the second relay lower end, six diode anodes in parallel, six diode negative terminals are connected in series first to the 6th controllable silicon respectively, and the controllable silicon negative electrode is to working power negative terminal, integrated circuit (IC)
2Output connects first triode of control and the 3rd relay thereof, and the work of the 3rd relay begins the main circuit load end is carried out short circuit, overcurrent preliminary examination, IC
2Output also connects the 8th controllable silicon and time-delay triggers resistance-capacitance circuit, and the 8th controllable silicon is connected in series the 4th relay, and the work of time-delay back the 4th relay is to the preliminary examination of leaking electricity of main circuit load end, integrated circuit (IC)
2Periphery time-delay resistance-capacitance circuit control integrated circuit IC
3The upset of output, and and then control be attached thereto that second triode time-delay conducting, the time-delay of the 9th silicon controlled that connect trigger, the energising adhesive of the 5th relay, guarantee that the 6th relay is the closure of high-power latching relay, and cut off the power supply of preliminary examination circuit.
Self-checking circuit is connected and composed by self check knob and the 4th controllable silicon, be terminated at working power end on the self check knob, self check knob lower end is connected to the 4th controllable silicon control utmost point, and the 4th controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
The present invention first in switch or protection equipment successful realization before the energising short circuit preliminary examination is carried out in the load end loop automatically; the overcurrent preliminary examination; the overvoltage preliminary examination; the electric leakage preliminary examination; pre-checking functions such as contrary merit preliminary examination; and the preliminary examination short-circuit resistance is below 0.5 Ω; the preliminary examination leakage current is below 30mA; really prevented the electrical fire that electric short circuit and electric faults such as ground connection electric fault (leakage current) and overtension cause; forceful electric power and light current have been solved fully; exchange and direct current; high frequency and low frequency; the technical barrier that high pressure docks with low pressure; particularly captured preliminary examination short-circuit resistance≤0.5 Ω, the preliminary examination technical barrier of preliminary examination leakage current≤30mA.The present invention also has the major loop load end under energising ruuning situation except pre-checking functions, the major loop load end is carried out overvoltage, overcurrent, short circuit, the isoparametric cycle detection of electric leakage, in case electric fault occurs, cut off circuit immediately and concrete fault, sound and light alarm are informed in indication.
The present invention is by rc-delay circuit and integrated circuit, triode, controllable silicon, the ingenious combination of relay, make load energising front sequence carry out contrary merit preliminary examination, short circuit, the overcurrent preliminary examination, the electric leakage preliminary examination, and guarantee no longer to carry out preliminary examination after the energising, reasonable in design, intelligent degree height, particularly most important two aspects are exactly to carry out contrary merit before the equipment energising on the technology of the present invention, short circuit, overcurrent, the preliminary examination of electric leakage automatic sequence, pinpoint the problems, cut off power-on switch by high-power latching relay, and self-sustaining does not allow to send, this has just greatly prevented the generation of accident, avoided life, property loss, and the conventional art back that switches on is often met fault and is cut off the electricity supply, at this moment might cause life and property loss, remedy again, late, therefore, the present invention is than conventional art, technical have a very big progress, and fail safe greatly increases.Circuit design logicality of the present invention in addition is strong, all linked with one another, multiple protective, and reliability improves greatly, and therefore, the present invention is multiple functional, intelligent degree height, circuit is simple, and tight reliable, the performance of taking precautions against natural calamities is good, should vigorously promote the use.
Description of drawings:
Fig. 1 is the present invention's electricity theory diagram
Fig. 2 is a housing cover installation diagram of the present invention
Fig. 3 is a housing base installation diagram of the present invention
Fig. 4 is the invention process circuit diagram
Referring to Fig. 1, electrical intelligent fire disaster protector electrical principle block diagram.Major loop is middle be divided into main circuit power end and main circuit load end because of high-power latching relay is serially connected in.The switching of high-power latching relay and fault are cut off and controlled by locking, control circuit, and locking, control circuit are also controlled the operating state that circuit and warning circuit are informed in indication simultaneously.Transformation, rectification, filter circuit are connected to power end, and the online inspection protection circuit of voltage preliminary examination and voltage sampling end is connected to transformation, rectification, filter circuit, and its output and locking, control circuit link.Contrary merit preliminary examination protection circuit, short circuit, overcurrent preliminary examination protection circuit, electric leakage preliminary examination and the online inspection protection circuit of electric leakage, the sampling end of short circuit, the online inspection circuit of overcurrent all is connected to load end, and its output all links with locking, control circuit.The sampling end of self-checking circuit is connected to the self check button, and its output and locking, control circuit link, and voltage shows and power end links.
Referring to Fig. 2, Fig. 3, multi-functional electrical intelligent fire disaster protector such as this electrical intelligent fire disaster protector is preliminary examination before a kind of energising, the energising online circulation inspection in back, fault outage, report to the police, locking, indication are informed.It is mainly electrically connected and is constituted by the mains switch on housing, the housing, reset button, self check button, voltmeter, indicator light, buzzer, hypersensitive zero sequence current mutual inductor, micro-transformer of current, high-power latching relay, intelligent electric-controlled plate, main circuit turnover binding post.Its feature is: housing top is provided with mains switch 5, reset button 6, self check button 7, A.C. voltmeter 3, six malfunction indicator lamp 8, power supply indicator 4, main circuit load end indicator light 9, two warning photoflash lamps 2; Be provided with in the housing: power supply turnover line terminals 12,16, hypersensitive zero sequence current mutual inductor 14, micro-transformer of current 15, warm cigarette interface 17, buzzer 18, high-power latching relay 11 and intelligent electric-controlled plate 13, latching relay 11 is J
6Two docking point J
6-1And J
6-2Be serially connected in respectively in the middle of the live wire centre and zero line of main circuit.Intelligent electric-controlled plate 13 is provided with short circuit, overcurrent preliminary examination circuit, contrary merit preliminary examination circuit, electric leakage preliminary examination and online electric leakage circulation inspection circuit, overvoltage preliminary examination (can online circulation inspection) circuit, online short circuit overcurrent circulation inspection circuit, indicates and informs sound light alarming circuit.
Referring to Fig. 4, enforcement circuit diagram of the present invention, the physical circuit composition is: short circuit, overcurrent preliminary examination protective circuit are by integrated circuit (IC)
2, first triode V
1, the 3rd relay J
3, the 7th controllable silicon T
7, W
4, R
9, R
10, R
11, R
12, R
13, R
14, C
8, C
9, C
10, C
11Constitute J
3Two winding point J
3-1And J
3-2Live wire and zero line with the main circuit load end inserts short circuit overcurrent preliminary examination circuit respectively.Contrary merit preliminary examination circuit is by D
1, D
2, D
3, D
4, C
1, R
2With first relay J
1Constitute, contrary merit preliminary examination circuit is connected across between the zero line of the zero line of main circuit input and load end.Electric leakage preliminary examination and the online inspection circuit of electric leakage are by D
17, W
2, C
15, hypersensitive zero sequence current mutual inductor ZCT
1, the 8th controllable silicon T
8, R
15, R
16, C
12With the 4th relay J
4Constitute J
4One group of normal opened contact J
4-1The live wire of main circuit load end is passed an end that inserts hypersensitive zero sequence current mutual inductor winding, and the other end of this winding is connected on the secondary winding of transformer B.By R
3, R
4, W
1, C
3With voltage stabilizing didoe DW
1Constitute over-voltage detection circuit and comprise preliminary examination and online inspection.By D
9One D
14, FD
1-FD
6, FD
9, FD
10The first controllable silicon T
1-Di six controllable silicon T
6, the 9th controllable silicon T
9, second triode V
2, C
4-C
7, C
13, R
5, R
6, R
7, R
17, R
18, R
19, R
20, R
21, loud speaker Y, second relay J
2With the 5th relay J
5Constitute locking, report to the police, indicate and inform circuit.The live wire of main circuit and zero line pass hypersensitive zero sequence current mutual inductor ZCT simultaneously
1By current transformer ZCT
2, D
18, voltage stabilizing didoe DW
2, R
22, R
23, W
3, C
16, C
17, C
18Constitute the online short circuit of energising, overcurrent circulation inspection circuit, the live wire of main circuit passes ZCT
2A.C. voltmeter 3 is connected in parallel on the input of main circuit, and the live wire of main circuit one the road inserts the elementary of power transformer B behind mains switch 5 (K), and one the road inserts power supply indicator, and the power supply indicator other end inserts main circuit input zero line.The load indicator light is connected in parallel on the load end of main circuit.
After the main circuit input powers on, the power turn-on K switch, the transformer B work of switching on, the AC low-tension of B level output is through D
5-D
8, C
2Give behind the rectifying and wave-filtering and the invention provides direct-current working volts, reset button AN
1Be normally closed button, at first carry out contrary merit preliminary examination after the present invention powers on, do not have under the situation of contrary merit fault second relay J at the main circuit load end
2The no power adhesive, IC
2The 3rd pin output high potential, first triode V
1Conducting, the 3rd relay J
3Energising is closed, begins the main circuit load end is carried out short circuit, overcurrent preliminary examination, simultaneously IC
3The high potential of the 3rd pin output is through R
15To capacitor C
12Charging does not have under short circuit, the over current fault situation second relay J at the main circuit load end
2Still keep the no power state, work as C
12Both end voltage is charged to and makes the 8th controllable silicon T
8During triggering and conducting, the 4th relay J
4The energising adhesive begins the preliminary examination of leaking electricity of main circuit load end, choose reasonable capacitor C
12Capability value, to guarantee at J
3After the energising closure is carried out short circuit, overcurrent preliminary examination end, J
4The adhesive of just the switching on preliminary examination of leaking electricity does not have J under the leak current fault situation at the main circuit load end
2Still keep the no power state.Work as C
9When both end voltage is charged to 2/3rds supply voltages, IC
2The 3rd pin becomes electronegative potential by high potential, J
3, J
4, outage discharges, finish the short circuit of main circuit load end, overcurrent preliminary examination and electric leakage preliminary examination task, choose reasonable C
9Capacitance to guarantee the fault pretest time to load end.IC
2After the 3rd pin becomes electronegative potential, V
2Become cut-off state by the saturation conduction state, power supply begins through resistance R
19To capacitor C
13C is worked as in charging
13Both end voltage is charged to and makes the 9th controllable silicon T
9During triggering and conducting, the 5th relay J
5The energising adhesive, J
5The 2nd winding point J
5-2The conversion normally closed contact disconnects, the normal opened contact closure, and electric current is through D
16→ J
5-2Normal opened contact → J
6→ C
14→ ground makes the 6th relay J
6Add positive pulse and transition status.J
6Two winding point J
6-1And J
6-2Change into closure state by off-state, at J
6Do not remain this closure state before adding negative pulse, main circuit load end and input power connection, J simultaneously
5The 1st group of normally closed contact J
5-1Disconnect, cut off the power supply of preliminary examination circuit,, only carry out online circulation inspection to guarantee that the present invention does not carry out preliminary examination under main circuit load end energising ruuning situation.
Physical circuit is analyzed:
Contrary merit preliminary examination protection: before sending electricity for the main circuit load end, the present invention at first carries out contrary merit preliminary examination, after load end zero line mistake seals in the live wire of another electric power system, forms a current supply circuit with main circuit input zero line, and this loop voltage is through capacitor C
1Step-down, D
1-D
4Rectification makes first relay J
1The conducting closure, J
1The 1st winding point J
1-1Conversion, its normal opened contact closure, the 5th controllable silicon T
5Conducting, contrary merit fault pretest warning light FD
5Conducting is shinny, simultaneously second relay J
2Energising is closed, J
2The 1st winding point J
2-1Conversion, its normally closed contact disconnects, and cuts off control circuit power supply (J in fact
1-1Normally closed contact disconnect already, the control circuit power supply cuts off already), J
6Be locked in off-state, the load end of main circuit can't be connected the input power supply.While J
2-1The normal opened contact closure, connect flash alarm circuit, buzzer Y powers alarm, two photoflash lamp FD
9And FD
10The energising flash of light.Thereby the electrical fire of having avoided the short trouble between the electric power system to cause.
Short circuit overcurrent preliminary examination protection: before the main circuit load end send electricity, under the contrary merit non-failure conditions of preliminary examination, the present invention begins the short circuit of preliminary examination load end, over current fault are carried out preliminary examination automatically, if any short circuit, over current fault, the present invention will automatically lock refusal and close a floodgate, fault content and sound and light alarm are informed in indication, thereby prevent the generation of electrical short, electric overcurrent fire incident.The operation principle of short circuit, overcurrent preliminary examination protection circuit is: when the main circuit input did not have electricity, the present invention did not work because of there being electricity, latching relay J
6Two winding point J
6-1And J
6-2Be in off-state, the input and the load end of main circuit are obstructed.Energising work of the present invention after the main circuit input has electricity, the 220V alternating current is through transformer B transformation, D
5One D
8And C
2Behind the rectifying and wave-filtering for the invention provides DC power supply, integrated circuit (IC)
2Energising work, IC
2The 3rd pin output high level, the first triode V
1Conducting, B
3Energising is closed, its normal opened contact J
3-1And J
3-2Closure is connected short circuit, overcurrent preliminary examination circuit, as load end then the 7th controllable silicon T of short circuit, over current fault is arranged
7Because of trigger voltage cross low can not conducting, the 6th controllable silicon T
6Conducting short circuit, over current fault preliminary examination indicator light FD
6It is shinny to switch on, simultaneously second relay J
2Energising is closed, J
2The 1st group of changeover contact J
2-1Conversion, its normally closed contact disconnects, latching relay J
6Be locked in normally open, the main circuit load end can't be connected the input power supply of main circuit.J
2-1The normally opened contact closure, connect sound light alarming circuit, send the sound and light alarm signal, adjust W
4The live wire and the short-circuit resistance between the zero line of load end are transferred to≤0.5 Ω, make the short circuit preliminary examination not report misoperation by mistake fully, really solve the very difficult technical barrier of implementing of the pre-checking functions of short circuit.
Electric leakage preliminary examination protection: before sending electricity for the main circuit load end, the present invention is carrying out contrary merit preliminary examination, short circuit, overcurrent preliminary examination, and in not contrary merit fault, short circuit, behind the over current fault, the preliminary examination of leaking electricity automatically, its operation principle is an integrated circuit (IC)
2Behind the 3rd pin output high potential, pass through resistance R
15To capacitor C
12C is worked as in charging
12Both end voltage is charged to and makes the 8th controllable silicon T
8During triggering and conducting, the 4th relay J
4The energising adhesive is from C
12Begin to be charged to T
8Time between the conducting is exactly that the present invention carries out contrary merit preliminary examination, the time of short circuit, overcurrent preliminary examination.J
4The 1st group of normal opened contact J
4-1Closure, the low-voltage AC of B level output of transformer is by the one end → hypersensitive zero sequence current mutual inductor ZCT of B level
1Elementary winding → J
4-1The other end of → load end live wire → ground fault resistance → the earth → main circuit input zero line → B time level, when ground fault resistance≤10K, ZCT flows through
1Primary winding current 〉=1mA, ZCT
1Secondary AC current with output makes D
17Conducting triggers the second controllable silicon T
2Conducting, leak current fault preliminary examination indicator light FD
2It is shinny to switch on, simultaneously second relay J
2The energising adhesive, J
2-1Normally-closed contact disconnect, make high-power latching relay J
6Be locked in off-state, J
2-1The normal opened contact closure, send the sound and light alarm signal, thereby stopped the electrical fire that the ground connection electric fault causes.The key of electric leakage preliminary examination is ZCT
1, ZCT
1Be on common zero sequence current mutual inductor, to increase an elementary winding, being actually increases an electric current line of going here and there zero sequence current mutual inductor, just the mode by winding increases and went here and there the electric current of zero sequence current mutual inductor centre bore, much more every went here and there the elementary number of turns of zero sequence current mutual inductor centre bore and just can reach the size of adjustment preliminary examination leakage current around going here and there the electric current of zero sequence current mutual inductor and double once enclosing, and changing.As: when requiring load end the leakage current of 50mA to occur, the present invention must refuse to send electricity to load end, and when so just selecting for use by the electric current of 50mA by the instrument transformer centre bore, the secondary winding output of instrument transformer should make D
17Conducting, T
2The zero sequence current mutual inductor of conducting, for this point, common zero sequence current mutual inductor can both reach requirement at present.The earth resistance of load end≤220V ÷ 50mA=4.4K, and the voltage of transformer B time level output must be≤the interchange safe voltage of 36V, now be assumed to 11V, 11V ÷ 4.4K=2.5mA, when zero sequence current mutual inductor secondary of going here and there is a circle, the electric current of zero sequence current mutual inductor of going here and there is 2.5mA, make and went here and there the electric current of zero sequence current mutual inductor and reach 50mA, the number of turns of the elementary winding of zero sequence current mutual inductor of going here and there so just must reach 20 circles, therefore went here and there the number of turns of the elementary winding of zero sequence current mutual inductor by change and just can reach refusal and send the requirement of leaking electricity of the difference of electricity, adjusted W in addition to load end
2Can be to ZCT
1Secondary output current is finely tuned.
Overvoltage protection: when the main circuit input powers on and gives before the main circuit load end send electricity, too high as the main circuit input terminal voltage, the present invention will refuse to send to load end, when the main circuit load end after normal power-up operation, as occurring the overtension fault suddenly, the present invention will be at 10ms internal cutting off main circuit load end power supply, to guarantee that main circuit load end power consumption equipment does not burn out because of overtension, thereby avoid the electrical fire that causes because of overtension, its operation principle is: when the main circuit input terminal voltage rises, the output voltage of B level of transformer rises thereupon, through D
5-D
8, C
2Direct voltage behind the rectifying and wave-filtering also and then rises, through R
3And R
4, W
1Voltage after partial is caught up with liter equally, when rising to voltage stabilizing didoe DW
1During the repercussion conducting, the first controllable silicon T
1Triggering and conducting, the overvoltage faulty indication is informed lamp FD
1Energising brightens, simultaneously second relay J
2Energising is closed, J
2The 1st winding point J
2-1Conversion, its normal opened contact closure is sent the sound and light alarm signal, and its normally closed contact disconnects, and cuts off the control circuit power supply, does not connect as the main circuit load end, then makes latching relay J
6Be locked in off-state, as the main circuit load end before this to be in normal operating condition (J
6Be in closure state), J then
2The 2nd winding point J
2-2Conversion, its normal opened contact closure, capacitor C
14Give J
6Discharge, J
6Because of negative pulse transition status, J
6Two winding point J
6-1And J
6-2Be converted to off-state by closure state, the present invention will change adjustable resistance W at 10ms internal cutting off main circuit load end power supply
1Resistance or voltage stabilizing didoe DW
1The voltage stabilizing value just can adjust the set point of main circuit voltage.
Online overcurrent, short circuit protection: when main circuit load end normal power-up is moved, as overcurrent or short trouble appear, the present invention will be at 10ms internal cutting off main circuit load end power supply, and excessive or short circuit does not burn out the electrical fire that causes because of electric current with the power consumption equipment of guaranteeing load end with electric line.Its operation principle is: when passing current transformer ZCT
2In live wire when overcurrent or short circuit occurring, ZCT
2The induced current that produces also will increase, and this electric current is through diode D
18, resistance R
22, R
23, W
3, capacitor C
16, C
17, C
18Make voltage stabilizing didoe DW
2The reverse breakdown conducting triggers the 3rd controllable silicon T
3Conducting, online overcurrent, short trouble indicator light FD
3It is shinny to switch on, second relay J
2The energising adhesive, J
2The 1st winding point J
2-1Conversion, its normal opened contact closure is sent the sound and light alarm signal, the 2nd winding point J
2-2Conversion, its normal opened contact closure, capacitor C
14Through J
2-2Normal opened contact to latching relay J
6Discharge, J
6Because of adding negative pulse transition status, J
6Two winding point J
6-1And J
6-2Become off-state by closure state, cut off main circuit load end power supply, change adjustable resistance W
3Resistance, or voltage stabilizing didoe DW
2The voltage stabilizing value, just can adjust the current setting value that flows through the main circuit live wire.
Online leakage protection: when main circuit load end normal power-up is moved, as occurring residual operating current suddenly, the present invention will cut off main circuit load end power supply in 10ms, not cause electrical fire because of the ground connection electric fault to guarantee load end.Its operation principle is: when the ground connection electric fault occurring, flow through and went here and there hypersensitive zero sequence current mutual inductor ZCT
1The electric current of two main circuit conductors will be uneven, ZCT
1Secondaryly will produce induced current, and the electric current difference that two main circuit conductors flow through is big more, ZCT
1The induced current that produces is also just big more, when earth current reaches the operating current value of setting, and ZCT
1The induced current that produces is through diode D
17, adjustable resistance W
2And capacitor C
15Trigger the second controllable silicon T
2Conducting, lamp FD is informed in online leak current fault indication
2It is shinny to switch on.J
2Energising is closed, J
2The 1st winding point J
2-1Conversion, its normal opened contact closure is sent the sound and light alarm signal, the 2nd winding point J
2-2Conversion, its normal opened contact closure, latching relay J
6Because of negative pulse transition status, J
6Two winding point J
6-1And J
6-2Change off-state into by closure state, cut off main circuit load end power supply, change adjustable resistance W
2Resistance just can be adjusted the action set point of earth fault current.
Said integrated circuit IC
1Model be: 7812, integrated circuit (IC)
2Model be: NE555.
Claims (8)
1, a kind of electrical intelligent fire disaster protector, it is characterized in that: major loop is middle be divided into main circuit power end and main circuit load end because of high-power latching relay is serially connected in, the switching of high-power latching relay and fault are cut off and are locked fully, the control of control circuit, locking, control circuit are also controlled indication and are informed circuit and warning circuit, and the input of transformation current rectifying and wave filtering circuit is connected to the main circuit power end; The online inspection protection circuit of voltage preliminary examination and voltage sampling end is connected to the transformation current rectifying and wave filtering circuit, the online inspection protection circuit of voltage preliminary examination and voltage output is connected to locking, control circuit, and the sampling end of contrary merit preliminary examination protection circuit, short circuit overcurrent preliminary examination protection circuit, electric leakage preliminary examination and the online inspection protection circuit of electric leakage, the online inspection protection circuit of short circuit overcurrent all is connected on the main circuit load end, its output of these circuit all connects locking, control circuit, the sampling end of self-checking circuit is the self check knob, and output also connects locking, control circuit.
2, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: the online inspection protection circuit of voltage preliminary examination and voltage is connected and composed by bleeder circuit and voltage stabilizing didoe, bleeder circuit connects the transformation rectification filter circuit output end, carry out voltage sampling, the other end is connected on the first SCR control utmost point of locking, control circuit, first controllable silicon is serially connected in second relay circuit of locking, control circuit, and the second control relay circuit working power break-make;
3, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: contrary merit preliminary examination protection circuit is connected and composed by the rectification circuit and first relay, two inputs of rectification circuit are connected across respectively on main circuit power end zero line and the main circuit load end zero line, rectification circuit two outputs connect first relay, the conversion of first relay contact, cut off locking, control circuit rear section working power, and triggering locks, the 5th controllable silicon of control circuit, and the 5th controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
4, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: short circuit, overcurrent preliminary examination protection circuit sampling end connect the 7th SCR control utmost point, the 7th controllable silicon anode connects the 6th SCR control utmost point, and the 6th controllable silicon is serially connected in second relay circuit of control circuit working power break-make;
5, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: electric leakage preliminary examination and the online inspection protection circuit of electric leakage are by hypersensitive zero sequence current mutual inductor and diode, potentiometer constitutes, the hypersensitive zero sequence current mutual inductor is installed in the live wire of main circuit load end, on the zero line, the hypersensitive zero sequence current mutual inductor is that common zero sequence current mutual inductor increases by an elementary winding, this elementary winding one end connects main circuit load end live wire, the other end connects on the transformer secondary output winding of main circuit power end, the secondary output of hypersensitive zero sequence current mutual inductor triggers locking behind diode, second controllable silicon of control circuit, and second controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
6, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: short circuit, the online inspection protection circuit of overcurrent are connected and composed by current transformer, diode, capacitance-resistance filter regulating circuit, voltage stabilizing didoe, current transformer is installed on the main circuit load end live wire, the secondary output of current transformer is behind diode, capacitance-resistance filter regulating circuit, voltage stabilizing didoe, be connected to the 3rd SCR control plate of locking, control circuit, and the 3rd controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
7, electrical intelligent fire disaster protector according to claim 1 is characterized in that: locking, control circuit comprise first to the 6th controllable silicon and diode thereof, second to the 6th relay, integrated circuit (IC)
2And peripheral circuit, the first and second two triodes, the 8th and the 9th controllable silicon, and resistance, electric capacity; Second relay upper end connects the working power anode of transformation current rectifying and wave filtering circuit output, the second relay lower end, six diode anodes in parallel, six diode negative terminals are connected in series first to the 6th controllable silicon respectively, and the controllable silicon negative electrode is to working power negative terminal, integrated circuit (IC)
2Output connects first triode of control and the 3rd relay thereof, and the work of the 3rd relay begins the main circuit load end is carried out short circuit, overcurrent preliminary examination, IC
2Output also connects the 8th controllable silicon and time-delay triggers resistance-capacitance circuit, and the 8th controllable silicon is connected in series the 4th relay, and the work of time-delay back the 4th relay is to the preliminary examination of leaking electricity of main circuit load end, integrated circuit (IC)
2Periphery time-delay resistance-capacitance circuit control integrated circuit IC
3The upset of output, and and then control be attached thereto that second triode time-delay conducting, the time-delay of the 9th silicon controlled that connect trigger, the energising adhesive of the 5th relay, guarantee that the 6th relay is the closure of high-power latching relay, and cut off the power supply of preliminary examination circuit.
8, electrical intelligent fire disaster protector according to claim 1, it is characterized in that: self-checking circuit is connected and composed by self check knob and the 4th controllable silicon, be terminated at working power end on the self check knob, self check knob lower end is connected to the 4th controllable silicon control utmost point, and the 4th controllable silicon is serially connected in second relay circuit of control circuit working power break-make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810143010A CN101685959A (en) | 2008-09-27 | 2008-09-27 | Electrical intelligent fire disaster protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810143010A CN101685959A (en) | 2008-09-27 | 2008-09-27 | Electrical intelligent fire disaster protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101685959A true CN101685959A (en) | 2010-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810143010A Pending CN101685959A (en) | 2008-09-27 | 2008-09-27 | Electrical intelligent fire disaster protector |
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| CN (1) | CN101685959A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410055A (en) * | 2014-12-11 | 2015-03-11 | 乐清市中贸智能科技有限公司 | Protection circuit for power supply line |
| CN104682344A (en) * | 2015-03-30 | 2015-06-03 | 威海人合机电股份有限公司 | Electrical circuit fire early-warning protector |
| CN107910853A (en) * | 2017-12-15 | 2018-04-13 | 湖南电铨科技股份有限公司 | AC three-phase intelligent object |
| CN110581652A (en) * | 2019-08-22 | 2019-12-17 | 中铁一局集团电务工程有限公司 | Three-phase voltage booster |
| CN111741096A (en) * | 2020-06-15 | 2020-10-02 | 沈阳安瑞信科技有限公司 | Wisdom fire extinguishing system based on thing networking |
| CN116826528A (en) * | 2023-06-16 | 2023-09-29 | 上海承控信息科技有限公司 | Strong and weak electricity integration equipment |
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2008
- 2008-09-27 CN CN200810143010A patent/CN101685959A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410055A (en) * | 2014-12-11 | 2015-03-11 | 乐清市中贸智能科技有限公司 | Protection circuit for power supply line |
| CN104410055B (en) * | 2014-12-11 | 2018-10-23 | 浙江中富电气有限公司 | A kind of supply line's protection circuit |
| CN104682344A (en) * | 2015-03-30 | 2015-06-03 | 威海人合机电股份有限公司 | Electrical circuit fire early-warning protector |
| CN104682344B (en) * | 2015-03-30 | 2017-09-15 | 威海人合机电股份有限公司 | A kind of electric wiring catches fire early warning protector |
| CN107910853A (en) * | 2017-12-15 | 2018-04-13 | 湖南电铨科技股份有限公司 | AC three-phase intelligent object |
| CN107910853B (en) * | 2017-12-15 | 2023-12-26 | 湖南电铨科技股份有限公司 | AC three-phase intelligent module |
| CN110581652A (en) * | 2019-08-22 | 2019-12-17 | 中铁一局集团电务工程有限公司 | Three-phase voltage booster |
| CN111741096A (en) * | 2020-06-15 | 2020-10-02 | 沈阳安瑞信科技有限公司 | Wisdom fire extinguishing system based on thing networking |
| CN116826528A (en) * | 2023-06-16 | 2023-09-29 | 上海承控信息科技有限公司 | Strong and weak electricity integration equipment |
| CN116826528B (en) * | 2023-06-16 | 2024-03-12 | 上海承控信息科技有限公司 | Strong and weak electricity integration equipment |
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