CN201266826Y - Electric fire intelligent protector - Google Patents
Electric fire intelligent protector Download PDFInfo
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- CN201266826Y CN201266826Y CNU2008201586250U CN200820158625U CN201266826Y CN 201266826 Y CN201266826 Y CN 201266826Y CN U2008201586250 U CNU2008201586250 U CN U2008201586250U CN 200820158625 U CN200820158625 U CN 200820158625U CN 201266826 Y CN201266826 Y CN 201266826Y
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- 230000001012 protector Effects 0.000 title claims abstract description 17
- 230000005611 electricity Effects 0.000 claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 230000009466 transformation Effects 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 52
- 229910052710 silicon Inorganic materials 0.000 claims description 52
- 239000010703 silicon Substances 0.000 claims description 52
- 238000004804 winding Methods 0.000 claims description 31
- 238000007689 inspection Methods 0.000 claims description 20
- 206010020751 Hypersensitivity Diseases 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000003032 molecular docking Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model discloses an intelligent protector of electric fire disaster. The main circuit is divided into a main circuit power terminal and a main circuit load terminal as a high-power self-sustaining relay is connected in the middle of the main circuit in series; the connection, disconnection and fault cut-off of the high-power self-sustaining relay are completely controlled by a lock and control circuit; the sampling end of a voltage pre-detection and online detection and protection circuit is connected to a voltage transformation rectification filter circuit of the power end, and the output end is connected with the lock and control circuit; the sampling ends of a reverse power pre-detection and protection circuit, a short circuit over-current pre-detection and protection circuit, an electricity loss pre-detection and electricity loss online detection and protection circuit, and a short circuit over-current online protection circuit are all connected to the load end of the main circuit, and the output ends thereof are all connected with the lock and control circuit. The intelligent protector is equipped with a plurality of functions such as detection before being electrified and online detection after being electrified, and the like; the pre-detection short circuit resistance and lost current are extremely small, therefore, fire disasters which are caused by electric faults such as electric short circuit, electricity loss, over voltage and the like are prevented; the safety protection performance is excellent, docking technical problems of strong and weak electricity, AC and DC, high frequency and low frequency, high voltage and low voltage are solved, the sensitivity is high and the technical performance is good.
Description
Technical field:
The utility model relates to a kind of electrical safety protector, is 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 in the utility model 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 adopted in the utility model 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 utility model 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 utility model 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 utility model 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 technical most important two aspects of the utility model are exactly to carry out contrary merit before the equipment energising, 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 utility model is than conventional art, technical have a very big progress, and fail safe greatly increases.The utility model circuit design logicality is strong in addition, and is all linked with one another, multiple protective, and reliability improves greatly, and therefore, the utility model 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 utility model electricity theory diagram
Fig. 2 is the utility model housing cover installation diagram
Fig. 3 is the utility model housing base installation diagram
Fig. 4 implements circuit diagram for the utility model
Referring to Fig. 1, electrical intelligent fire disaster protector electrical principle block diagram. Major loop is because of high-power self-sustaining Relay is serially connected in middle and is divided into main circuit power end and main circuit load end. High-power latch-in relay Switching and fault cut off and controlled by locking, control circuit, locking, control circuit are also controlled simultaneously The duty of indication notifying circuit and warning circuit. Transformation, rectification, filter circuit are connected to power end, electricity Press preliminary examination and voltage to examine online the protection circuit sampling end and be connected to transformation, rectification, filter circuit, 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 of electric leakage protection circuit, the sampling end that short circuit, overcurrent are examined circuit online all is connected to load end, Its output all links with locking, control circuit. The sampling end of self-checking circuit is connected to the self check button, and it is defeated Go out end and locking, control circuit links, voltage shows with power end and links.
Referring to Fig. 2, Fig. 3, this electrical intelligent fire disaster protector, be preliminary examination before a kind of energising, energising after The multi-functional electrical intelligent fire disasters such as circulation is examined online, fault is cut off the power supply, report to the police, lock, indication is informed protect Device. It is mainly by the power switch on housing, the housing, SR, self check button, voltmeter, indication Lamp, buzzer, hypersensitive zero sequence current mutual inductor, micro-transformer of current, high-power latch-in relay, Intelligent electric-controlled plate, main circuit turnover binding post electrically connect formation. Its feature is: housing top is provided with electricity Source switch 5, SR 6, self check button 7, A.C. voltmeter 3, six malfunction indicator lamp 8, power supply Indicator lamp 4, main circuit load end indicator lamp 9, two warning flash lamps 2; Be provided with in the housing: the 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 latch-in relay 11 and intelligent electric-controlled plate 13, latch-in relay 11 is J6Two docking point J6-1And J6-2Be serially connected in respectively in the middle of the live wire centre and zero line of main circuit. Intelligent electric-controlled plate 13 are provided with short circuit, overcurrent preliminary examination circuit, contrary merit preliminary examination circuit, electric leakage preliminary examination and online electric leakage circulation inspection electricity Road, overvoltage preliminary examination (inspection online can circulate) circuit, sound is informed in online short circuit overcurrent circulation inspection circuit, indication Optical alarm circuit.
Referring to Fig. 4, implementing circuit figure of the present utility model, the physical circuit composition is: short circuit, overcurrent preliminary examination holding circuit are by IC2, first triode V1, the 3rd relay J3, the 7th controllable silicon T7、
W
4、R
9、R
10、R
11、R
12、R
13、R
14、C
8、C
9、C
10、C
11Consist of J3Two winding point J3-1And J3-2Live wire and zero line with the main circuit load end inserts short circuit overcurrent preliminary examination circuit respectively. Contrary merit preliminary examination electricity Route D1、D
2、D
3、D
4、C
1、R
2With first relay J1Consist of, contrary merit preliminary examination circuit is connected across the master Between the zero line of circuit input end and the zero line of load end. The electric leakage preliminary examination is examined circuit by D online with electric leakage17、
W
2、C
15, hypersensitive zero sequence current mutual inductor ZCT1, the 8th controllable silicon T8、R
15、R
16、C
12With the 4th relay J4Consist of J4One group of normal opened contact J4-1The live wire of main circuit load end is passed the access hypersensitive One end of zero sequence current mutual inductor winding, the other end of this winding is connected on the secondary windings of transformer B. By R3、R
4、W
1、C
3With Zener diode DW1Consist of over-voltage detection circuit and comprise preliminary examination and online inspection. By D9—D
14、FD
1—FD
6、FD
9、FD
10The first controllable silicon T1-the six controllable silicon T6, the 9th controllable silicon T9, second triode V2、C
4—C
7、C
13、R
5、R6、R
7、R
17、R
18、R
19、R
20、R
21, loudspeaker Y, second relay J2With the 5th relay J5Consist of locking, report to the police, indicate notifying circuit. Main The live wire of circuit and zero line pass hypersensitive zero sequence current mutual inductor ZCT simultaneously1 By current transformer ZCT2、
D
18, Zener diode DW2、R
22、R
23、W
3、C
16、C
17、C
18Consist of the online short circuit of energising, overcurrent circulation inspection circuit, the live wire of main circuit passes ZCT2 A.C. voltmeter 3 is connected in parallel on the input of main circuit End, the live wire of main circuit one tunnel access power transformer B elementary through power switch 5 (K) after, the one tunnel Insert power supply indicator, the power supply indicator other end inserts main circuit input zero line. The parallel connection of load indicator lamp Load end at 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 D5—D
8，C
2Provide direct-current working volts to the utility model behind the rectifying and wave-filtering, SR AN1Be normally closed button, at first carry out contrary merit preliminary examination after the utility model powers on, do not have in the situation of contrary merit fault second relay J at the main circuit load end2The no power adhesive, IC2The 3rd pin output high potential, first triode V1Conducting, the 3rd relay J3Energising is closed, begins the main circuit load end is carried out short circuit, overcurrent preliminary examination, simultaneously IC3The high potential of the 3rd pin output is through R15To capacitor C12Charging does not have in short circuit, the over current fault situation second relay J at the main circuit load end2Still keep the no power state, work as C12Both end voltage is charged to and makes the 8th controllable silicon T8During triggering and conducting, the 4th relay J4The energising adhesive begins the preliminary examination of leaking electricity of main circuit load end, choose reasonable capacitor C12Capability value, to guarantee at J3After the energising closure is carried out short circuit, overcurrent preliminary examination end, J4The adhesive of just the switching on preliminary examination of leaking electricity does not have J in the leak current fault situation at the main circuit load end2Still keep the no power state. Work as C9When both end voltage is charged to 2/3rds supply voltages, IC2The 3rd pin becomes electronegative potential by high potential, J3、J
4, outage discharges, finish the short circuit of main circuit load end, overcurrent preliminary examination and electric leakage preliminary examination task, choose reasonable C9Capacitance to guarantee load end The fault pretest time. IC2After the 3rd pin becomes electronegative potential, V2Become cut-off state by the saturation conduction state, power supply begins through resistance R19To capacitor C13C is worked as in charging13Both end voltage is charged to and makes the 9th controllable silicon T9During triggering and conducting, the 5th relay J5The energising adhesive, J5The 2nd winding point J5-2The conversion normally closed contact disconnects, the normal opened contact closure, and electric current is through D16→J
5-2Normal opened contact → J6→C
14→ ground makes the 6th relay J6Add Positive pulse and transition status. J6Two winding point J6-1And J6-2Change into closure state by off-state, at J6Do not remain this closure state before adding negative pulse, main circuit load end and input power connection, simultaneously J5The 1st group of normally closed contact J5-1Disconnect, cut off the power supply of preliminary examination circuit, negative to guarantee at main circuit Carry under the end energising ruuning situation, the utility model does not carry out preliminary examination, and inspection online only circulates.
Embodiment:
Contrary merit preliminary examination protection: before sending electricity for the main circuit load end, the utility model 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 utility model 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 utility model 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 utility model was not worked 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.The utility model energising work after the main circuit input has electricity, the 220V alternating current is through transformer B transformation, D
5-D
8And C
2Behind the rectifying and wave-filtering for the utility model 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 utility model 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 utility model 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 utility model must be refused 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 utility model will be refused to send to load end, when the main circuit load end after normal power-up operation, as occurring the overtension fault suddenly, the utility model 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 utility model 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 utility model 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 utility model 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 |
|---|---|---|---|
| CNU2008201586250U CN201266826Y (en) | 2008-09-27 | 2008-09-27 | Electric fire intelligent protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201586250U CN201266826Y (en) | 2008-09-27 | 2008-09-27 | Electric fire intelligent protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266826Y true CN201266826Y (en) | 2009-07-01 |
Family
ID=40833195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201586250U Expired - Fee Related CN201266826Y (en) | 2008-09-27 | 2008-09-27 | Electric fire intelligent protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201266826Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
| CN102110971A (en) * | 2009-12-23 | 2011-06-29 | 张斌 | Intelligent protection controller for low-voltage distribution room |
| CN116424354A (en) * | 2023-03-09 | 2023-07-14 | 长城汽车股份有限公司 | Control method, device and vehicle under BSG motor failure mode |
-
2008
- 2008-09-27 CN CNU2008201586250U patent/CN201266826Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064515A (en) * | 2009-11-16 | 2011-05-18 | 淳俅 | Domestic intelligent electrical safe power distribution system |
| CN102110971A (en) * | 2009-12-23 | 2011-06-29 | 张斌 | Intelligent protection controller for low-voltage distribution room |
| CN116424354A (en) * | 2023-03-09 | 2023-07-14 | 长城汽车股份有限公司 | Control method, device and vehicle under BSG motor failure mode |
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| 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: 20090701 Termination date: 20091027 |