CN204886120U - Automatic monitoring operational failure's circuit protection device - Google Patents
Automatic monitoring operational failure's circuit protection device Download PDFInfo
- Publication number
- CN204886120U CN204886120U CN201520672471.7U CN201520672471U CN204886120U CN 204886120 U CN204886120 U CN 204886120U CN 201520672471 U CN201520672471 U CN 201520672471U CN 204886120 U CN204886120 U CN 204886120U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- power supply
- fault
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses an automatic monitoring operational failure's circuit protection device, circuit protection device includes earth fault protection unit and self - fault monitoring unit, wherein the earth fault protection unit includes earth fault detection circuitry, alternating current power supply passageway and electromagnetic drive circuit, oneself fault monitoring unit includes automatic test circuit, observes and controls circuit and alert circuit. Earth fault protection circuit and self - fault monitoring unit timesharing work realize not cutting off the power supply self - fault monitoring, take the high impedance quarantine measures between self - fault monitoring unit and the earth fault protection unit, and the arbitrary component in the self - fault monitoring unit breaks down the safety protection ability that all can not reduce the earth fault protection unit.
Description
Technical field
The utility model belongs to circuit protection technical field; particularly relate to a kind of circuit protection device of automatic monitoring operation troubles; espespecially aftercurrent action protecting equipment or ground fault circuit interrupting device; this protectiveness circuit interrupting device can monitor own operating condition automatically, and sends alarm signal when operation troubles occurs for self.
Background technology
Aftercurrent action protecting equipment; or ground fault circuit interrupting device; for detecting electrical appliance and supply line's earth fault current such as electrical equipment, instrument, device, equipment, electrical system of being powered by electric network source; when this earth fault current exceedes the limit value of regulation; circuit protection device by automatic cut-off power, thus reaches the object of protection personal safety and safety of property.In actual use; aftercurrent action protecting equipment, or the ground fault detection circuit of ground fault circuit interrupting device usually can locally or all lose efficacy, and causes the defencive function of ground fault circuit interrupting device to lose efficacy; and now user does not know, there is potential safety hazard.
In order to solve the problem; some aftercurrent action protecting equipments, according to standard design such as IEC61008-1, IEC61009-1, GB6829.1, are provided with a testing button; require user regularly, monthly this button of manual operation, can normally work with test circuit protective device.This adds the work load of user on the one hand; moreover; this periodic detection must cut off the power supply circuit of user; user is brought inconvenience; 3rd, if user does not carry out periodic detection, or circuit protection device breaks down in twice periodic detection interval (as month); and user can not Timeliness coverage circuit protection device unprotect ability, there is potential safety hazard equally.
In order to solve the problem, some ground fault circuit interrupting devices, according to UL943 standard design, have attempted arranging a self-malfunction monitoring unit, with the working condition of periodic diagnosis ground fault circuit interrupting device.But; at present; these self-fault monitoring devices have because of its circuit and structure too complicated; cause manufacture difficulty increase, product cost is too high or practicality is lower;, still there is potential safety hazard in the reliability reducing the original defencive function of circuit protection device because adding automatic monitoring circuit had.
Summary of the invention
The utility model is the extension of CN101295609B patent, provides a kind of circuit protection device of automatic monitoring operation troubles.Content described in CN101295609B patent will be incorporated in this patent.A technical problem to be solved in the utility model is for described protectiveness circuit interrupting device provides a kind of initial stage of being energized to implement the circuit of self-malfunction monitoring.Another technical problem to be solved in the utility model is for described protectiveness circuit interrupting device provides a kind of timing oneself the circuit of malfunction monitoring.Another technical problem to be solved in the utility model is for described protectiveness circuit interrupting device provides a kind of not power-off oneself the circuit of malfunction monitoring.Another technical problem to be solved in the utility model is for described protectiveness circuit interrupting device provides an automatic fault observation circuit not reducing the protection abilities of protectiveness circuit interrupting device.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A circuit protection device for automatic monitoring operation troubles, described circuit protection device comprises earth fault protection unit 1 and self-malfunction monitoring unit 2, and wherein earth fault protection unit 1 is grounded failure protection function; Wherein self-malfunction monitoring unit 2 monitors the operation conditions of earth fault protection unit 1 automatically, teaching display stand malfunction monitoring function.Described earth fault protection unit 1 comprises ground fault detection circuit 101, AC power path 10 2 and circuit driven by electromagnetic means 104, described ground fault detection circuit 101 is for detecting the earth fault current that AC power path 10 2 produces, drive the action of described circuit driven by electromagnetic means 104, disconnect or connect the AC power of described AC power path 10 2; Described self-malfunction monitoring unit 2 comprises automatic testing circuit 201, telemetry circuit 202 and warning circuit 203; described automatic testing circuit 201 is under the control of telemetry circuit 202; the earth fault current for self-malfunction monitoring is sent to earth fault protection unit 1; telemetry circuit 202 monitors the malfunction feedback information from earth fault protection unit 1; judge the operation conditions of earth fault protection unit 1, and to be given a warning information by warning circuit 203.
Wherein, described ground fault detection circuit 101 comprises earth fault current transducer 150, neutral line iterative earthing transducer 160, first DC power supply 180 and Earth Fault Detection chip 170, the earth-fault signal that this Earth Fault Detection chip 170 is passed on for detection of ground faults current sensor 150 and neutral line iterative earthing transducer 160, and export dropout triggering signal and trigger described circuit driven by electromagnetic means 104 and work; Described first DC power supply 180 is for connecting ac power input end, and producing DC power supply is that described Earth Fault Detection chip 170 is powered, and the negative pole of this first DC power supply 180 is as the internal logic ground GND of described circuit protection device;
Described AC power path 10 2 comprises the first and second ac power supply terminals (T1, T2) for connecting AC power; For connecting one group of face terminals (26,27) of load or/and socket panel (34A/34B); And for being switched on or switched off the first and second ac power supply terminals (T1, T2) and face terminals (26,27) or/and the magnetic switch 88 of electrical path between socket panel (34A/34B); Described first and second ac power supply terminals (T1, T2) connect the moving contact of described magnetic switch 88 by AC power conductor (91,92), and described face terminals (26,27) is or/and socket panel (34A/34B) connects the fixed contact of described magnetic switch 88;
Described circuit driven by electromagnetic means 104, comprise diode 143, tripping coil 142, controllable silicon SCR 141, resistance 146, electric capacity 147 and rectifier diode 188, the positive pole of described diode 143 connects the first ac power supply terminal T1, the negative pole of this diode 143 is connected through the anode of tripping coil 142 with controllable silicon SCR 141, the negative electrode of this controllable silicon SCR 141 is connected with GND, the positive pole of rectifier diode 188 is connected with GND, the negative pole of rectifier diode 188 is connected with the second ac power supply terminal T2, the control pole of described controllable silicon SCR 141 is connected through the output of resistance 146 with Earth Fault Detection chip 170, between the control pole that described electric capacity 147 is connected to described controllable silicon SCR 141 and GND, described tripping coil 142 is for magnetic switch described in magnetic drive 88.
Further; described earth fault protection unit 1 also comprises manual testing's circuit 103; described manual testing's circuit 103 produces an earth fault current for manual activation on AC power path 10 2; described manual testing's circuit 103 comprises the earth fault Test Switchboard 35 and resistance 131 that connect successively, and described manual testing's circuit 103 is connected between described first and second ac power supply terminals (T1, T2).
Automatic testing circuit 201 described in the utility model comprises ground fault resistance 215, rectifier diode 189 and self-inspection triode 211, the collector electrode of wherein said self-inspection triode 211 is connected with the described AC power conductor 92 passing described neutral line iterative earthing transducer 160 and described earth fault current transducer 150 through described ground fault resistance 215, this AC power conductor 92 is connected with described second ac power supply terminal T2, and the emitter of this self-inspection triode 211 is connected with described first ac power supply terminal T1 after rectifier diode 189;
Described telemetry circuit 202 comprises: Fisrt fault signal input branch road 240, for the state information of tripping coil described in real-time Transmission 142; Second fault-signal input branch road 250, for the health information of ground fault detection circuit described in timing transmission 101 and described controllable silicon SCR 141; Monitoring chip 263, for real-time reception and monitor Fisrt fault signal input branch road 240 and the second fault-signal input branch road 250 output signal, start by set date oneself malfunction monitoring process, judge the operation conditions of described earth fault protection unit 1, and send health information to described warning circuit 203; Second DC power supply 270, its output V2 is used for providing DC power supply to described self-malfunction monitoring unit 2, and the negative pole of this second DC power supply 270 is connected with GND.
Further, described Fisrt fault signal input branch road 240, between the anode that its input is connected on described controllable silicon SCR 141 and described tripping coil 142, its output voltage VB1 is connected to described monitoring chip 263, and this Fisrt fault signal input branch road 240 comprises at least one electric capacity 242, and AC power is through diode 143 and tripping coil 142, again through resistance 241, charge to electric capacity 242, make the voltage rise on electric capacity 242, thus make described VB1 increase; Described Fisrt fault signal input branch road 240 forms a delay circuit, and when described diode 143 and described tripping coil 142 fault-free, described VB1, by the time TR1 a setting, rises to the reference voltage VH1 being greater than a setting from 0V; When diode (143) and/or tripping coil 142 open circuit, described VB1 is by the time a setting, and drop to the reference voltage VL1 being less than a setting, wherein VH1 is less than described V2, VL1 and is less than or equal to VH1;
Described second fault-signal input branch road 250, its input is connected on the anode of described controllable silicon SCR 141, its output voltage VB2 is connected to described monitoring chip 263, this second fault-signal input branch road 250 includes electric capacity 252, by described second DC power supply 270 through resistance 253, provides charging current to electric capacity 252, and/or by monitoring chip 263 through diode 268, there is provided charging current to electric capacity 252, make the voltage rise on electric capacity 252, thus make described VB2 increase; When controllable silicon SCR 141 conducting, the electric charge on electric capacity 252 is discharged by controllable silicon SCR 141 through diode 251, thus described VB2 is declined; Described second fault-signal input branch road 250 forms another delay circuit, and when described controllable silicon SCR 141 is ended, described VB2 is greater than the reference voltage VH2 of a setting by rising to; When controllable silicon SCR 141 conducting, described VB2 is less than the reference voltage VL2 of a setting by dropping to, wherein VH2 is less than described V2, VL2 and is less than or equal to VH2.
Further, described monitoring chip 263 monitors described VB1, and control the charging current of described electric capacity 252, when described VB1 is greater than described VH1, or drop to the process being more than or equal to described VL1 at described VB1 from being greater than VH1, make electric capacity 252 be in low speed charging process, thus make described VB2 at the time TR21 of a setting, slowly rise to be greater than described VH2 from being less than described VL2; When described VB1 is less than VL1, or rise at described VB1 be less than or equal to the process of VH1 from being less than VL1, make electric capacity 252 be in rapid charge process, thus make described VB2 at the time TR22 of a setting, TR22 is less than TR21, rapidly increases to be greater than VH2 from being less than VL2;
The output of described monitoring chip 263 is connected through the base stage of resistance 218 with described self-inspection triode 211, when described VB2 is greater than described VH2, or drop to the process being more than or equal to described VL2 at described VB2 gradually from being greater than VH2, the output VOUT of this monitoring chip 263 is high level, thus makes self-inspection triode 211 conducting; When described VB2 is less than VL2, or rises at VB2 be less than or equal to the process of VH2 from being less than VL2, the output VOUT of this monitoring chip 263 is low level, and described self-inspection triode 211 ends;
When the output VOUT of described monitoring chip 263 transfers high level to by low level, described telemetry circuit 202 starts once self-malfunction monitoring process, in this self-malfunction monitoring process, described ground fault detection circuit 101 triggers the conducting of described controllable silicon SCR 141, described VB2 drops to be less than described VL2 from being greater than described VH2, the output VOUT of described monitoring chip 263 returns low level by high level, terminates this self-malfunction monitoring process.
Further; at the energising initial stage; described telemetry circuit 202 is in setting-up time TR1; every described time TR22; implement one or many oneself malfunction monitoring process; when described earth fault protection unit 1 fault-free, this telemetry circuit 202 sends the information of " system is normal ", makes described warning circuit 203 send one or many passage of scintillation light.
Or; the self-malfunction monitoring process of one or many is implemented in described telemetry circuit 202 timing; this timing equals described time TR21; when described earth fault protection unit 1 fault-free; this telemetry circuit 202 is in self-malfunction monitoring process each time; send the information of " system is normal ", make described warning circuit 203 send a passage of scintillation light.
Above-mentioned self-malfunction monitoring process, the self-monitoring at first energising initial stage, it is a kind of frequent self-monitoring process, power on and perform immediately, and only perform in the short time TR1 at the initial stage of powering on, within this TR1 time, perform one or many oneself malfunction monitoring, secondary self-monitoring process is separated by the TR22 time; It two is timing self-monitorings of normal work period, and it is a kind of low-frequency degree self-monitoring process, and repeat and often perform a self-monitoring process at regular intervals, be separated by the TR21 time, TR21 is more much bigger than TR22.When earth fault protection unit breaks down, exit low-frequency degree timing self-monitoring immediately, enter frequent self-monitoring process.
Further, in described self-malfunction monitoring process, when breaking down because of described ground fault detection circuit 101 and/or described controllable silicon SCR 141, and cause controllable silicon SCR 141 can not conducting time, oneself's malfunction monitoring process can not normal termination, this telemetry circuit 202 sends the warning message of " system failure ", makes described warning circuit 203 send lasting red light, or fast blink light.
When described tripping coil 142 open circuit, this telemetry circuit 202 will continue, and every described time TR22, implement once described self-malfunction monitoring process, and send the warning message of " system failure ", make described warning circuit 203 send the red light of fast blink continuously.
When there is the anode shorted to earth of described controllable silicon SCR 141, this telemetry circuit 202 cannot self-malfunction monitoring process described in start by set date, now, warning circuit 203 will be caused to fail regularly to send passage of scintillation light, or making described warning circuit 203 send fast blink light, warning occurs " system failure ".
Diode 251 in second fault-signal input branch road 250 described in the utility model plays one-way conduction effect in circuit, when its forward conduction for the electric charge discharged in described electric capacity 252 provides electrical path, when its oppositely cut-off time realize the high impedance that described tripping coil 142 and described second earth-fault signal input between branch road 250 and isolate; Total resistance of the resistance 241 of described Fisrt fault signal input branch road 240 is greater than 1M Ω, isolates for the high impedance be effectively grounded between error protection unit 1 and self-malfunction monitoring unit 2.
First ac power supply terminal T1 described in the utility model is connected with the phase line of AC power, and described second ac power supply terminal T2 is connected with the neutral line of AC power; Or described first ac power supply terminal T1 is connected with the neutral line of AC power, described second ac power supply terminal T2 is connected with the phase line of AC power.
The waveform of described AC power is cycle alternation ripple, and each alternation ripple comprises two half-waves:
First half-wave of AC power, during this first half-wave, the electromotive force of the first ac power supply terminal T1 is higher than the electromotive force of the second ac power supply terminal T2; With
Second half-wave of AC power, during this second half-wave, the electromotive force of the first ac power supply terminal T1 is lower than the electromotive force of the second ac power supply terminal T2.
When the phase line of AC power is connected on described first ac power supply terminal T1, when the neutral line of AC power is connected on described second ac power supply terminal T2, the first half-wave of described AC power is the positive half wave of AC power; When the phase line of AC power is connected on described second ac power supply terminal T2, when the neutral line of AC power is connected on described first ac power supply terminal T1, the first half-wave of described AC power is the negative half-wave of AC power; During second half-wave of described AC power and the first half-wave of described AC power are in the different half-wave of two of AC mains cycle ripple.
Circuit driven by electromagnetic means 104 described in the utility model is one-way conduction circuits, during the first half-wave of described AC power, when described controllable silicon SCR 141 conducting, enough large drop-away current could be produced in described tripping coil 142, thus described magnetic switch 88 is disconnected, be grounded failure protection function; During the second half-wave of described AC power, no matter described controllable silicon SCR 141 whether conducting, all can not produce drop-away current in described tripping coil 142, described magnetic switch 88 can not action.
Automatic testing circuit 201 described in the utility model is one-way conduction circuits, during the second half-wave of described AC power, when 211 conducting of described self-inspection triode, this automatic testing circuit 201 could produce an earth fault current for self-malfunction monitoring in described AC power path 10 2; During the first half-wave of described AC power, no matter described self-inspection triode 211 whether conducting, this automatic testing circuit 201 is all in cut-off state, therefore can not produce earth fault current.
Telemetry circuit 202 described in the utility model exports high level in any time of AC mains cycle ripple and makes the conducting of described self-inspection triode 211, without the need to phase selection, realizes not power-off oneself malfunction monitoring function.
The circuit protection device of the automatic monitoring operation troubles that the utility model proposes, the realization of earth fault protection unit is to the detection of the earth fault that ac power supply loop and electrical appliance occur and safeguard function.Oneself's malfunction monitoring unit adopts two delay circuits to realize the malfunction monitoring at energising initial stage and periodic timing failures monitoring function.Ground fault protection circuit and self-malfunction monitoring unit time-sharing work, realize not power-off oneself malfunction monitoring.Take high impedance quarantine measures between oneself's malfunction monitoring unit and earth fault protection unit, the arbitrary element failure in self-malfunction monitoring unit all can not reduce the protection abilities of earth fault protection unit.Circuit is simple, economical, efficient, solves inconvenience and potential potential safety hazard that personal monitoring brings.
Accompanying drawing explanation
Fig. 1 is the structural framing figure of the utility model embodiment;
Fig. 2 is a kind of embodiment schematic diagram of AC power wiring;
Fig. 3 is the another kind of embodiment schematic diagram of AC power wiring;
Fig. 4 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
Be described in further details technical solutions of the utility model below in conjunction with drawings and Examples, following examples are not formed restriction of the present utility model.
Fig. 1 is the structural framing figure of the circuit protection device of a kind of automatic monitoring operation troubles of the utility model embodiment.This circuit protection device comprises an earth fault protection unit 1 and a self-malfunction monitoring unit 2.
Wherein, earth fault protection unit 1 comprises ground fault detection circuit 101, AC power path 10 2, manual testing's circuit 103, circuit driven by electromagnetic means 104.Ground fault detection circuit 101, AC power path 10 2 and circuit driven by electromagnetic means 104 form one can the ground fault protection circuit of independent operating, and manual testing's circuit 103 simulates an earth fault current, for testing earth fault protection function.
Oneself's malfunction monitoring unit 2 comprises automatic testing circuit 201, telemetry circuit 202, warning circuit 203.Oneself's malfunction monitoring unit 2 and earth fault protection unit 1 form a closed loop measurement and control system, and earth fault protection unit 1 is the monitoring target of self-malfunction monitoring unit 2, with teaching display stand malfunction monitoring function.Its process is: automatic testing circuit 201 is under the control of telemetry circuit 202; the earth fault current for self-malfunction monitoring is sent to earth fault protection unit 1; telemetry circuit 202 monitors the malfunction feedback information from earth fault protection unit 1; judge the operation conditions of earth fault protection unit 1, and to be given a warning information by warning circuit 203.
Fig. 2 is a kind of AC power winding diagram, a kind of mode of connection of AC power in AC power path 10 2 shown in exploded view 1.Wherein the phase line L of AC power is connected on ac power supply terminal T1, and the neutral line N of AC power is connected on ac power supply terminal T2.
Fig. 3 is another kind of AC power winding diagram, the another kind of mode of connection of AC power in AC power path 10 2 shown in exploded view 1.Wherein the phase line L of AC power is connected on ac power supply terminal T2, and the neutral line N of AC power is connected on ac power supply terminal T1.
As shown in Figure 2 and Figure 3, AC power is connected between described ac power supply terminal T1 and described ac power supply terminal T2.The waveform of AC power is periodic wave, and as sine wave, each periodic wave comprises two half-waves:
First half-wave of an AC power, when AC power is connected between described ac power supply terminal T1 and described ac power supply terminal T2, during this first half-wave, the electromotive force of ac power supply terminal T1, higher than the electromotive force of ac power supply terminal T2, namely forms a forward voltage between ac power supply terminal T1 and ac power supply terminal T2; With
Second half-wave of an AC power, when AC power is connected between described ac power supply terminal T1 and described ac power supply terminal T2, during this second half-wave, the electromotive force of ac power supply terminal T1, lower than the electromotive force of ac power supply terminal T2, namely forms a reverse voltage between ac power supply terminal T1 and ac power supply terminal T2.
Because the mode of connection of AC power in AC power passage is different, first half-wave of above-mentioned AC power can be the positive half wave of AC power or negative half-wave: when the phase line of AC power is connected on ac power supply terminal T1, when the neutral line of AC power is connected on and states on ac power supply terminal T2, first half-wave of AC power is the positive half wave (now, the electromotive force of phase line is higher than the electromotive force of the neutral line) of AC power; When the phase line of AC power is connected on ac power supply terminal T2, when the neutral line of AC power is connected on ac power supply terminal T1, the first half-wave of AC power is the negative half-wave of AC power (now, the electromotive force of phase line is lower than the electromotive force of the neutral line).Meanwhile, during the second half-wave of AC power and the first half-wave of AC power are in the different half-wave of two of AC mains cycle ripple, the second half-wave of AC power can be negative half-wave or the positive half wave of AC power.
Fig. 4 is the circuit theory diagrams of the present embodiment, and wherein the mode of connection of AC power as shown in Figure 3.Ground fault detection circuit 101 comprises earth fault current transducer 150, neutral line iterative earthing transducer 160, DC power supply 180 and Earth Fault Detection chip 170 and peripheral circuit.Earth fault current transducer 150 is connected with Earth Fault Detection chip 170 with the output of neutral line iterative earthing transducer 160.
DC power supply 180 comprises resistance 184, rectifier bridge stack 181, resistance 182 and electric capacity 183; the output cathode V1 (in Fig. 4 185) of DC power supply 180 is connected (in Fig. 4 175) with earth fault chip 170, and the negative pole of DC power supply 180 is as the logically GND of earth fault protection unit 1 and self-malfunction monitoring unit 2 inside.
AC power path 10 2 comprises ac power supply terminal T1 and ac power supply terminal T2, face terminals 26 and face terminals 27, socket panel 34A and socket panel 34B, AC power conductor 91 and AC power conductor 92 and a magnetic switch 88.One end of AC power conductor 91 is connected with ac power supply terminal T1, and the other end of AC power conductor 91 is connected with the moving contact 98A of magnetic switch 88 through earth fault current transducer 150 and neutral line iterative earthing transducer 160 are rear; One end of AC power conductor 92 is connected with ac power supply terminal T2, and the other end of AC power conductor 92 is connected with the moving contact 99A of magnetic switch 88 through earth fault current transducer 150 and neutral line iterative earthing transducer 160 are rear; The fixed contact (98B, 98C and 99B, 99C) of magnetic switch 88 is connected with the binding post of face terminals (26 and 27) and socket panel (34A/34B) respectively.When magnetic switch 88 closes, AC power is connected on face terminals and socket panel through magnetic switch 88; When magnetic switch 88 disjunction, ac power supply terminal and be in off-state between face terminals and socket panel.
Circuit driven by electromagnetic means 104 comprises a diode 188 in diode 143, tripping coil 142, controllable silicon SCR 141, resistance 146, electric capacity 147 and rectifier bridge stack 181.Ac power supply terminal T1 is connected with the positive pole of diode 143, the negative pole of this diode 143 is connected through the anode of tripping coil 142 with controllable silicon SCR 141, the negative electrode of this controllable silicon SCR 141 is connected with GND, the positive pole of the diode 188 in rectifier bridge stack 181 is connected with GND, and the negative pole of diode 188 is connected with ac power supply terminal T2.The control pole of controllable silicon SCR 141 is connected with the output 177 of Earth Fault Detection chip 170 through resistance 146.Because of the one-way conduction effect of diode 143 and diode 188, make the circuit loop of this circuit driven by electromagnetic means can only one-way conduction.Its process is: when the output 177 of Earth Fault Detection chip 170 is for high level, controllable silicon SCR 141 conducting, during first half-wave of AC power, diode 143 and diode 188 conducting, tripping coil 142 obtains drop-away current, and magnetic switch 88 is disconnected; During second half-wave of AC power, diode 143 and diode 188 end, and tripping coil 142 can not get drop-away current, magnetic switch 88 attonity.
Manual testing's circuit 103 comprises the earth fault Test Switchboard 35 and resistance 131 that connect successively, and one end is connected with ac power supply terminal T1, and the other end connects ac power supply terminal T2.
Earth fault protection unit 1 relies on ground fault detection circuit 101, circuit driven by electromagnetic means 104 and magnetic switch 88 to be grounded failure protection function.Its process is: connect earth fault Test Switchboard 35 when artificial, or when loaded line and electrical appliance leak electricity, during the earth faults such as person electric shock, AC power path 10 2 produces an earth fault current, when the earth fault current on AC power path 10 2 exceedes trip action current value, the output 177 of Earth Fault Detection chip 170 is high level, controllable silicon SCR 141 conducting is made through resistance 146, as previously mentioned, during first half-wave of AC power (now diode 143 and diode (188) conducting), tripping coil 142 and magnetic switch 88 work, make magnetic switch 88 disjunction in AC power path 10 2, thus the input terminal (T1 that cuts off the electricity supply, T2) with face terminals (26, 27) interface channel and between socket panel (34A/34B), be grounded failure protection function.
Telemetry circuit 202 comprises DC power supply 270, fault-signal input branch road 240, fault-signal input branch road 250, diode 268, monitoring chip 263 and auxiliary circuit (resistance 261, resistance 262).
Auxiliary circuit exports VIH and VIL (corresponding to the VS1 in Fig. 4, VS2 interface) to monitoring chip 263, and monitoring chip 263 produces internal reference voltage VH1, VL1, VH2 and VL2 according to VIH and VIL.Wherein, VH1 is less than V2, and VL1 is less than or equal to VH1; VH2 is less than V2, and VL2 is less than or equal to VH2.VH1, VL1, VH2 and VL2 also can directly be produced by monitoring chip 263 inside, now can save auxiliary circuit.
DC power supply 270 comprises resistance 271, diode 272, electric capacity 273 and voltage-stabiliser tube 274.The positive pole V2 (in Fig. 4 275) of its output is connected in self-malfunction monitoring unit 2 on corresponding voltage terminal V2, and the negative pole of its output is connected with GND.
Fault-signal input branch road 240 comprises resistance 241, resistance 243 and electric capacity 242.One end of electric capacity 242 is connected with the IN1 pin (in Fig. 4 266) of monitoring chip 263, the other end of electric capacity 242 is connected with GND, the anode of controllable silicon SCR 141 is connected with the IN1 pin of monitoring chip 263 through resistance 241, and resistance 243 and electric capacity 242 are connected in parallel.When tripping coil 142 and diode 143 fault-free, AC power, through diode 143, tripping coil 142 and resistance 241, is charged to electric capacity 242, and the time TR1 that the voltage VB1 on electric capacity 242 is set at, as in 5S, rises to from 0V and be greater than VH1; When tripping coil 142 and/or diode 143 open circuit, VB1, by the time a setting, as in 1S, drops to lower than VL1.Monitoring chip 263 by monitoring VB1, to judge the whether open circuit of tripping coil 142 and diode 143.
Fault-signal input branch road 250 comprises diode 251, resistance 253 and electric capacity 252.One end of electric capacity 252 is connected with the IN2 pin (in Fig. 4 267) of monitoring chip 263, the other end of electric capacity 252 is connected with GND, DC power supply 275 is connected with the IN2 pin of monitoring chip 263 through resistance 253, the negative pole of diode 251 is connected with the anode of controllable silicon SCR 141, and the positive pole of diode 251 is connected with the IN2 pin of monitoring chip 263.There is provided charging current to electric capacity 252 by DC power supply 275 through resistance 253, and/or by the pin VS3 of monitoring chip 263 through diode 268, and/or by other pins of monitoring chip, provide charging current to electric capacity 252.Controllable silicon SCR 141, through diode 251, discharges the electric charge in this electric capacity 252.When controllable silicon SCR 141 is ended, the voltage VB2 on electric capacity 252 will rise to and be greater than VH2; When controllable silicon SCR 141 conducting, VB2 will drop to lower than VL2, until the electric current flowing through controllable silicon SCR 141 is less than extinction current value, controllable silicon SCR 141 is ended.Monitoring chip 263 passes through monitoring VB2, to judge the fault state of ground fault detection circuit 101 and circuit driven by electromagnetic means 104.
Described monitoring chip 263 monitors the voltage VB1 on electric capacity 242, and the charging current of control capacitance 252, when VB1 value is greater than VH1, or drop in VB1 value be more than or equal to the process of VL1 from being greater than VH1, the charging circuit be made up of fault-signal input branch road 250 and/or monitoring chip 263, as previously mentioned, less charging current I1 is provided to electric capacity 252, electric capacity 252 is in low speed charging process, thus make the voltage VB2 on electric capacity 252 at the time TR21 of a setting, as in 60S, rise to higher than VH2 from lower than VL2; When VB1 value is less than described VL1, or rise at VB1 be gradually less than or equal to the process of VH1 from being less than VL1, the charging circuit provided by charging circuit and/or monitoring chip 263 pin of fault-signal input branch road 250 Inner Constitution, as previously mentioned, there is provided larger charging current I2 to electric capacity 252, electric capacity 252 is in rapid charge process, thus makes VB2 at the time TR22 of a setting, as in 1S, rise to higher than VH2 from lower than VL2.Wherein, TR22 is less than TR21, and I2 is greater than I1.
Described monitoring chip 263 monitors the voltage VB2 on electric capacity 252, when VB2 value is less than VL2, or rise in VB2 value be gradually less than or equal to the process of VH2 from being less than VL2, the output VOUT of this monitoring chip 263 is low level, when VB2 value is greater than VH2, or drop in VB2 value be gradually more than or equal to the process of VL2 from being greater than VH2, the output VOUT (in Fig. 4 265) of this monitoring chip 263 is high level.
Described automatic testing circuit 201 comprises diode 189 in resistance 218, self-inspection triode 211, ground fault resistance 215, rectifier bridge stack 181 and resistance 184 forms.The base stage of self-inspection triode 211 is connected with the output VOUT of monitoring chip 263 through resistance 218.The collector electrode of self-inspection triode 211 is connected with the AC power conductor 92 passing earth fault current transducer 150 and neutral line iterative earthing transducer 160 through ground fault resistance 215.The emitter of self-inspection triode 211 is connected with GND.The emitter of self-inspection triode 211 is connected with ac power supply terminal T1 with a resistance 184 through a diode 189.
A special case of the present embodiment is VH1=VH2=VIH, VL1=VL2=VIL, VIH=VIL.
As described in CN101295609B patent, circuit is in the complete period of AC power, during comprising positive half wave and during negative half-wave, without the need to phase selection, random generation is used for the earth fault current of self-malfunction monitoring, namely, during the positive half wave of AC power, send the earth fault current for self-malfunction monitoring, or send the earth fault current for self-malfunction monitoring during the negative half-wave of AC power.
The utility model circuit is optimized on the basis of CN101295609B patent: in the holocyclic any time of AC power, without the need to phase selection, and monitoring chip 263 makes self-inspection triode 211 conducting by resistance 218; Meanwhile, at least one diode 189 is set in automatic testing circuit 201, utilizes the one-way conduction effect of diode 189, make automatic testing circuit 201 during the second half-wave of AC power, only produce earth fault current for self-malfunction monitoring.
The protectiveness circuit interrupting device of the utility model design can realize not power-off oneself malfunction monitoring function.Its method is: earth fault protection unit 1 and self-malfunction monitoring unit 2 time-sharing work, make the conducting during the first half-wave of AC power of this circuit driven by electromagnetic means 104, and end during the second half-wave of AC power; Make the conducting during the second half-wave of AC power of this automatic testing circuit 201 simultaneously, and end during the first half-wave of AC power.Its observation process is: monitoring chip 263 exports high level makes the self-inspection triode 211 in automatic testing circuit 201 be energized, during the second half-wave of AC power (now diode 189 conducting), automatic testing circuit 201 sends earth fault current to AC power path 10 2, make controllable silicon SCR 141 conducting, during this, because circuit driven by electromagnetic means 104 is in cut-off state, can not cause tripping coil 142 and magnetic switch 88 that trip action occurs, realize not power-off oneself malfunction monitoring function.
Earth fault protection unit 1 is divided into two parts to carry out malfunction monitoring by the utility model design.One is, carries out periodic monitor to ground fault detection circuit 101 and controllable silicon SCR 141.Two are, carry out Real-Time Monitoring to diode 143 and tripping coil 142.
The process of described periodic monitor is: when the voltage VB2 on electric capacity 252 is from during lower than VIL rising and more than VIH, the output VOUT of monitoring chip (263) is high level (being greater than 2V), this VOUT makes self-inspection triode 211 conducting in automatic testing circuit 201, automatic testing circuit 201 produces earth fault analog current, when ground fault detection circuit 101 and controllable silicon SCR 141 and auxiliary circuit fault-free, controllable silicon SCR 141 conducting, electric charge on electric capacity 252 is fast released through diode 251 and controllable silicon SCR 141, thus make VB2 drop quickly to lower than VIL, now, VOUT transfers low level to by high level, self-inspection triode 211 ends, earth fault analog current disappears, controllable silicon SCR 141 continues the electric charge on release electric capacity 252, until controllable silicon SCR 141 is ended, this periodic monitor process terminates.Said process, when ground fault detection circuit 101 and controllable silicon SCR 141 and auxiliary circuit fault-free, monitoring chip 263 exports the cue of " system is normal ".Said process, when ground fault detection circuit 101 and/or controllable silicon SCR 141 and auxiliary circuit break down, to cause controllable silicon SCR 141 can not conducting or shorted to earth fault, when controllable silicon SCR 141 can not conducting time, VB2 is greater than VIH scope by continuing to remain on, this periodic monitor process is undertaken continuing (endless), and monitoring chip 263 exports the warning signal of " system failure "; When controllable silicon SCR 141 shorted to earth, VB2 is less than VIL scope by continuing to remain on, and self-malfunction monitoring unit 2 cannot implement follow-up self-monitoring, and monitoring chip 263 exports the warning signal of " system failure ".
The utility model design implements one or many periodic monitor process as above at the energising initial stage.When AC power is connected on power supply terminal (T1 and T2), described VB1 is in the time of setting, as in the 5S time, rise to gradually from 0V and be less than or equal to VIH, during this period, as mentioned above, electric capacity 252 is in rapid charge process, make VB2 rapidly increase to higher than VIH from lower than VIL, implement once periodic monitor process as above subsequently, at the end of this observation process.Subsequently, monitoring chip 263 continues monitoring VB1, when VB1 is still less than or equal to VIH, again repeats said process, until VB1 is greater than VIH, terminates energising initial stage observation process.The time that energising initial stage observation process need experience is determined by the charging interval TR1 of electric capacity 242, and the interval time between twice observation process is determined by the charging interval TR22 of electric capacity 252.
The utility model design is after energising initial stage observation process, or after last periodic monitor process, electric capacity 252 is in low speed charging process as above, described VB2 is at the time TR21 of setting, as in 60S, rise to higher than VIH from lower than VIL, implement once periodic monitor process as above subsequently, the electric charge in electric capacity 252 is released, VB2 is declined, controllable silicon SCR 141 is ended, and then charges to electric capacity 252, so goes round and begins again.Interval time between twice periodic monitor process is determined by the charging interval TR21 of electric capacity 252.
The utility model design implements Real-Time Monitoring to tripping coil 142 and diode 143.Its process is: when tripping coil 142 and diode 143 fault-free, described VB1 is greater than VIH, and self-malfunction monitoring unit 2 continues to press current time interval run timing observation process; When there is open circuit fault in tripping coil 142 and/or diode 143, as mentioned above, VB1 drops to lower than VIL, oneself's malfunction monitoring unit 2 will enter the continuous open-ended periodic monitor process same with the preliminary phase that is energized immediately, and monitoring chip 263 sends the warning message of " system failure " to warning circuit 203.
Described warning circuit 203 receives the information warning that monitoring chip 263 exports, and points out the running status of protectiveness circuit interrupting device in the mode such as sound, light.In Fig. 4 circuit, warning circuit 203 comprises a LED36B, when earth fault protection unit 1 fault-free, and the LED flicker one or many in warning circuit 203; When earth fault protection unit 1 breaks down, the LED in warning circuit 203 glimmers continuously or lights for a long time, or does not work for a long time.
Adopt high impedance quarantine measures between the self-malfunction monitoring unit 2 of the utility model design and earth fault protection unit 1, the arbitrary element failure in self-malfunction monitoring unit 2 all can not reduce the protection abilities of earth fault protection unit 1.Its method is: in fault-signal input branch road 240, comprise at least one high-impedance resistors, and as resistance 241, the high impedance realized between fault-signal input branch road 240 and earth fault protection unit 1 is isolated; In fault-signal input branch road 250, comprise at least one one-way conduction diode, as diode 251, utilize the reverse cut-off characteristics of diode, teaching display stand malfunction monitoring unit 2 and earth fault protection unit 1 high impedance are isolated.
Known to those skilled in the art, drawings and Examples of the present utility model are only and function of the present utility model, structure and principle are described and should become the limit value in the utility model understanding; Meanwhile, the purpose of this utility model all realizes.Above-described embodiment may be had some change when not departing from the utility model principle, so protection of the present utility model should be as the criterion with the scope described in claims.
Claims (10)
1. automatically monitor the circuit protection device of operation troubles for one kind, it is characterized in that, described circuit protection device comprises earth fault protection unit (1) and self-malfunction monitoring unit (2), and wherein said earth fault protection unit (1) comprises ground fault detection circuit (101), AC power passage (102) and circuit driven by electromagnetic means (104); Described self-malfunction monitoring unit (2) comprises automatic testing circuit (201), telemetry circuit (202) and warning circuit (203).
2. circuit protection device as claimed in claim 1, it is characterized in that, described ground fault detection circuit (101) comprises earth fault current transducer (150), neutral line iterative earthing transducer (160), first DC power supply (180) and Earth Fault Detection chip (170), the earth-fault signal that this Earth Fault Detection chip (170) is passed on for detection of ground faults current sensor (150) and neutral line iterative earthing transducer (160), and export dropout triggering signal trigger described circuit driven by electromagnetic means (104) work, described first DC power supply (180) is for connecting ac power input end, producing DC power supply is the power supply of described Earth Fault Detection chip (170), and the negative pole of this first DC power supply (180) is as the internal logic ground GND of described circuit protection device,
Described AC power passage (102) comprises the first and second ac power supply terminals (T1, T2) for connecting AC power; For connecting one group of face terminals (26,27) of load or/and socket panel (34A/34B); And for being switched on or switched off the first and second ac power supply terminals (T1, T2) and face terminals (26,27) or/and the magnetic switch (88) of electrical path between socket panel (34A/34B); Described first and second ac power supply terminals (T1, T2) connect the moving contact of described magnetic switch (88) by AC power conductor (91,92), and described face terminals (26,27) is or/and socket panel (34A/34B) connects the fixed contact of described magnetic switch (88);
Described circuit driven by electromagnetic means (104), comprise diode (143), tripping coil (142), controllable silicon SCR (141), resistance (146), electric capacity (147) and rectifier diode (188), the positive pole of described diode (143) connects the first ac power supply terminal (T1), the negative pole of this diode (143) is connected through the anode of tripping coil (142) with controllable silicon SCR (141), the negative electrode of this controllable silicon SCR (141) is connected with GND, the positive pole of rectifier diode (188) is connected with GND, the negative pole of rectifier diode (188) is connected with the second ac power supply terminal (T2), the control pole of described controllable silicon SCR (141) is connected with the output (177) of Earth Fault Detection chip (170) through resistance (146), between the control pole that described electric capacity (147) is connected to described controllable silicon SCR (141) and GND, described tripping coil (142) is for magnetic switch described in magnetic drive (88).
3. circuit protection device as claimed in claim 2; it is characterized in that; described earth fault protection unit (1) also comprises manual testing's circuit (103); described manual testing's circuit (103) is for manual activation generation earth fault current on AC power passage (102); described manual testing's circuit (103) comprises the earth fault Test Switchboard (35) and resistance (131) that connect successively, and described manual testing's circuit (103) is connected between described first and second ac power supply terminals (T1, T2).
4. circuit protection device as claimed in claim 2, it is characterized in that, described automatic testing circuit (201) comprises ground fault resistance (215), rectifier diode (189) and self-inspection triode (211), the collector electrode of wherein said self-inspection triode (211) is connected with the described AC power conductor (92) of passing described neutral line iterative earthing transducer (160) and described earth fault current transducer (150) through described ground fault resistance (215), this AC power conductor (92) is connected with described second ac power supply terminal (T2), the emitter of this self-inspection triode (211) is connected with described first ac power supply terminal (T1) after rectifier diode (189),
Described telemetry circuit (202) comprising: Fisrt fault signal input branch road (240), for the state information of tripping coil described in real-time Transmission (142); Second fault-signal input branch road (250), for the health information of ground fault detection circuit described in timing transmission (101) and described controllable silicon SCR (141); Monitoring chip (263), for real-time reception and monitor Fisrt fault signal input branch road (240) and the second fault-signal input branch road (250) output signal, start by set date oneself malfunction monitoring process, judge the operation conditions of described earth fault protection unit (1), and send health information to described warning circuit (203); Second DC power supply (270), its output V2 is used for providing DC power supply to described self-malfunction monitoring unit (2), and the negative pole of this second DC power supply (270) is connected with GND.
5. circuit protection device as claimed in claim 4, it is characterized in that, described Fisrt fault signal input branch road (240), its input is connected between the anode of described controllable silicon SCR (141) and described tripping coil (142), its output voltage VB1 is connected to described monitoring chip (263), this Fisrt fault signal input branch road (240) comprises at least one electric capacity (242), AC power is through diode (143) and tripping coil (142), again through resistance (241), charge to electric capacity (242), make the voltage rise on electric capacity (242), thus make described VB1 increase,
Described Fisrt fault signal input branch road (240) forms a delay circuit, when described diode (143) and described tripping coil (142) fault-free, described VB1, by the time TR1 a setting, rises to the reference voltage VH1 being greater than a setting from 0V; When diode (143) and/or tripping coil (142) open circuit, described VB1 is by the time a setting, and drop to the reference voltage VL1 being less than a setting, wherein VH1 is less than described V2, VL1 and is less than or equal to VH1;
Described second fault-signal input branch road (250), its input is connected on the anode of described controllable silicon SCR (141), its output voltage VB2 is connected to described monitoring chip (263), this second fault-signal input branch road (250) includes electric capacity (252), by described second DC power supply (270) through resistance (253), charging current is provided to electric capacity (252), and/or by monitoring chip (263) through diode (268), charging current is provided to electric capacity (252), make the voltage rise on electric capacity (252), thus make described VB2 increase, when controllable silicon SCR (141) conducting, the electric charge on electric capacity (252) is discharged by controllable silicon SCR (141) through diode (251), thus described VB2 is declined,
Described second fault-signal input branch road (250) forms another delay circuit, and when described controllable silicon SCR (141) is ended, described VB2 is greater than the reference voltage VH2 of a setting by rising to; When controllable silicon SCR (141) conducting, described VB2 is less than the reference voltage VL2 of a setting by dropping to, wherein VH2 is less than described V2, VL2 and is less than or equal to VH2.
6. circuit protection device as claimed in claim 5, it is characterized in that, described monitoring chip (263) monitors described VB1, and control the charging current of described electric capacity (252), when described VB1 is greater than described VH1, or drop to the process being more than or equal to described VL1 at described VB1 from being greater than VH1, electric capacity (252) is made to be in low speed charging process, thus make described VB2 at the time TR21 of a setting, slowly rise to be greater than described VH2 from being less than described VL2; When described VB1 is less than VL1, or rise at described VB1 be less than or equal to the process of VH1 from being less than VL1, make electric capacity (252) be in rapid charge process, thus make described VB2 at the time TR22 of a setting, TR22 is less than TR21, rapidly increases to be greater than VH2 from being less than VL2;
The output of described monitoring chip (263) is connected through the base stage of resistance (218) with described self-inspection triode (211), when described VB2 is greater than described VH2, or drop to the process being more than or equal to described VL2 at described VB2 gradually from being greater than VH2, the output VOUT of this monitoring chip (263) is high level, thus makes self-inspection triode (211) conducting; When described VB2 is less than VL2, or rises at VB2 be less than or equal to the process of VH2 from being less than VL2, the output VOUT of this monitoring chip (263) is low level, described self-inspection triode (211) cut-off;
When the output VOUT of described monitoring chip (263) transfers high level to by low level, described telemetry circuit (202) starts once self-malfunction monitoring process, in this self-malfunction monitoring process, described ground fault detection circuit (101) triggers described controllable silicon SCR (141) conducting, described VB2 drops to be less than described VL2 from being greater than described VH2, the output VOUT of described monitoring chip (263) returns low level by high level, terminates this self-malfunction monitoring process.
7. circuit protection device as claimed in claim 5, it is characterized in that, diode (251) in described second fault-signal input branch road (250) plays one-way conduction effect in circuit, when its forward conduction for the electric charge in release described electric capacity (252) provides electrical path, when its oppositely cut-off time realize the high impedance that described tripping coil (142) and described second earth-fault signal input between branch road (250) and isolate; Total resistance of the resistance (241) of described Fisrt fault signal input branch road (240) is greater than 1M Ω, isolates for the high impedance be effectively grounded between error protection unit (1) and self-malfunction monitoring unit (2).
8. circuit protection device as claimed in claim 2, it is characterized in that, described first ac power supply terminal (T1) is connected with the phase line of AC power, and described second ac power supply terminal (T2) is connected with the neutral line of AC power; Or described first ac power supply terminal (T1) is connected with the neutral line of AC power, described second ac power supply terminal (T2) is connected with the phase line of AC power.
9. circuit protection device as claimed in claim 8, it is characterized in that, the waveform of described AC power is cycle alternation ripple, and each alternation ripple comprises two half-waves:
First half-wave of AC power, during this first half-wave, the electromotive force of the first ac power supply terminal (T1) is higher than the electromotive force of the second ac power supply terminal (T2); With
Second half-wave of AC power, during this second half-wave, the electromotive force of the first ac power supply terminal (T1) is lower than the electromotive force of the second ac power supply terminal (T2).
10. circuit protection device as claimed in claim 9, it is characterized in that, when the phase line of AC power is connected on described first ac power supply terminal (T1), when the neutral line of AC power is connected on described second ac power supply terminal (T2), the first half-wave of described AC power is the positive half wave of AC power; When the phase line of AC power is connected on described second ac power supply terminal (T2), when the neutral line of AC power is connected on described first ac power supply terminal (T1), the first half-wave of described AC power is the negative half-wave of AC power; During second half-wave of described AC power and the first half-wave of described AC power are in the different half-wave of two of AC mains cycle ripple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672471.7U CN204886120U (en) | 2015-09-01 | 2015-09-01 | Automatic monitoring operational failure's circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672471.7U CN204886120U (en) | 2015-09-01 | 2015-09-01 | Automatic monitoring operational failure's circuit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886120U true CN204886120U (en) | 2015-12-16 |
Family
ID=54830452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520672471.7U Active CN204886120U (en) | 2015-09-01 | 2015-09-01 | Automatic monitoring operational failure's circuit protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204886120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021093457A1 (en) * | 2019-11-11 | 2021-05-20 | 西安交通大学 | Anti-electric-shock monitoring and protection method and apparatus for low-voltage user end |
-
2015
- 2015-09-01 CN CN201520672471.7U patent/CN204886120U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021093457A1 (en) * | 2019-11-11 | 2021-05-20 | 西安交通大学 | Anti-electric-shock monitoring and protection method and apparatus for low-voltage user end |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104901289A (en) | Circuit protection device for automatically monitoring operation faults | |
| CN102890235B (en) | A kind of fault detection method and device | |
| CN103022959B (en) | Method and device for adhesion detection of main contact of alternating-current contactor | |
| CN105896469B (en) | A kind of circuit protection device of automatic monitoring operation troubles | |
| MX2008015294A (en) | Gfci with self-test and remote annunciation capabilities. | |
| CN104577977A (en) | Voltage and current switchable type electric leakage protection device | |
| CN101083393A (en) | Steering circuit for earthing fault breaker | |
| CN108631263A (en) | Ground-fault protection system | |
| CN104198926A (en) | Anti-trip loop test device for breaker and control method thereof | |
| CN102998573B (en) | Electric arc fault protection device verifying attachment | |
| CN103792451A (en) | Detection circuit and instrument for relay protective device protective outlet loop | |
| CN204886120U (en) | Automatic monitoring operational failure's circuit protection device | |
| CN203849376U (en) | Breaker anti-tripping loop testing apparatus | |
| CN204389621U (en) | With electric detection means and arrangements of electric connection | |
| CN106166990A (en) | A kind of startup power circuit | |
| CN105914723B (en) | The switching device of residual current circuit breaker | |
| CN211375009U (en) | Direct current power supply loop detection device | |
| CN102332700B (en) | Anti-lightning leakage detection and protection circuit | |
| CN201956663U (en) | Infrared induction automatic power off alarm device | |
| CN205863908U (en) | The switching device of residual current circuit breaker | |
| CN109906558A (en) | Biopsy method and equipment | |
| CN204441856U (en) | Electric current and voltage switching earth leakage protective device | |
| CN111474422B (en) | Ground fault protection system | |
| CN203658518U (en) | Intelligent cell polarity reversal connection resistance alarm device | |
| CN201638340U (en) | Fire prevention pre-alarm device for machine room of base station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190116 Address after: 325600 Yueqing Economic Development Zone, Wenzhou City, Zhejiang Province, 360 Jingqi Road (within Yueqing Sanxingjingguang Lighting Co., Ltd.) Patentee after: Zhejiang Shouxin Electric Power Equipment Co., Ltd. Address before: 314200 West Side of Xinxing Third Road on the South Side of Duli Highway in Pinghu Economic Development Zone, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Trimone Electric Science and Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200609 Address after: 323000 No.64, Tongji street, Shuige Economic Development Zone, nanmingshan street, Liandu District, Lishui City, Zhejiang Province (Lijing National Industrial Park) Patentee after: Lishui Shouxin Electric Technology Co., Ltd Address before: 325600 Yueqing Economic Development Zone, Wenzhou City, Zhejiang Province, 360 Jingqi Road (within Yueqing Sanxingjingguang Lighting Co., Ltd.) Patentee before: Zhejiang Shouxin Electric Power Equipment Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 323000 No.3, shanha Road, Shuige Economic Development Zone, nanmingshan street, Liandu District, Lishui City, Zhejiang Province (Lijing National Industrial Park) Patentee after: Lishui SANMENG Electric Technology Co.,Ltd. Address before: 323000 No.64, Tongji street, Shuige Economic Development Zone, nanmingshan street, Liandu District, Lishui City, Zhejiang Province (Lijing National Industrial Park) Patentee before: Lishui Shouxin Electric Technology Co., Ltd |