CN101207279A - Anti-overstep tripping system - Google Patents
Anti-overstep tripping system Download PDFInfo
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- CN101207279A CN101207279A CNA2007100931855A CN200710093185A CN101207279A CN 101207279 A CN101207279 A CN 101207279A CN A2007100931855 A CNA2007100931855 A CN A2007100931855A CN 200710093185 A CN200710093185 A CN 200710093185A CN 101207279 A CN101207279 A CN 101207279A
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Abstract
The invention relates to an anti-override tripping system, high voltage comprehensive protector devices are arranged on a main switch and a sub switch, the voltage signal and the electric current signal are collected by the signal acquisition module in the high voltage comprehensive protector device and sent to a controller module, the controller module judges the signal, and the working of the main switch and the sub switch is controlled by the output result. The invention is characterized in that the locking signal sent by the sub switch and transmitted by the CAN bus line is connected between the controlling modules of the main switch and the sub switch. When a short circuit failure occurs in the sub circuit of the sub switch, the locking signal is sent by the protector; simultaneously, the tripping command is also sent, after receiving the locking signal, the main switch delays a period of time to wait for the tripping of the sub switch, if the sub switch does not trips, the main switch trips to protect the whole circuit, to prevent the override trip from occurring.
Description
Technical field
The invention belongs to a kind of mining high-voltage microcomputer protecting device, relate in particular to the anti-overstep tripping system in a kind of supply network.
Background technology
In electric substation; often be that a master switch is controlled a plurality of switch-dividings; the high voltage protective device all is installed on master switch and switch-dividing at present; three-phase voltage in the sense switch, biphase current, and zero-sequence current and residual voltage; when occurring faults such as short circuit or overcurrent in the circuit; the work of high voltage protective device is by judging the size of current setting, corresponding switch trip in the control circuit.But the mechanical response speed of switch is slow, and when master switch and switch-dividing close together, switch-dividing is not also carried out trip signal fully, and master switch moves because of being judged as short trouble, overstep tripping occurs, enlarges the power failure scope.
The shortcoming of prior art is: do not have effective protective device to prevent the overstep tripping accident, in case overstep tripping takes place, influence the operate as normal of other branch roads that do not break down, enlarge the power failure scope, bring unnecessary loss.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can effectively prevent overstep tripping system, even certain switch-dividing causes tripping operation because of short trouble, protective device also can well be discerned, and can not cause the tripping operation of master switch, ensures the operate as normal of other branch roads.
Concrete scheme of the present invention is: a kind of anti-overstep tripping system, comprise master switch and switch-dividing, on described master switch and described switch-dividing the high pressure comprehensive protection device is installed all, described high pressure comprehensive protection device is made up of signal acquisition module, signal processing module, controller module and Executive Module; Described signal acquisition module acquired signal also sends to described signal processing module, described signal processing module is sent into described controller module after acquired signal is handled, described controller module is differentiated signal, output is differentiated the result and is given described Executive Module, and described Executive Module is controlled the described master switch and the described switch-dividing work at its place respectively;
Its key is: the receiving terminal RXD and the TXD that are connected with a CAN chip at the controller module output P0.25 and the TD1 of described switch-dividing; The transmitting terminal RXD and the TXD that are connected with the 2nd CAN chip at the controller module input P0.25 and the TD1 of described master switch; A described CAN chip output CANH links to each other with CANL with the receiving terminal CANH of described the 2nd CAN chip respectively with CANL.
The one CAN chip and the 2nd CAN chip transmit block signal, and be more stable, rapider.
Controller module in the described switch-dividing comprises:
Be used to judge whether the device of short-circuit signal; Controller module obtains three phase voltages that signal acquisition module is gathered, two phase currents, and zero-sequence current and residual voltage signal, and the signal of gathering judged;
If there is not short-circuit signal, then enter the device that is used to return; Promptly enter in the main program, other work of continuation system are a work period with other tasks of system, re-execute the described device that is used to judge whether short-circuit signal once more;
If short-circuit signal is arranged, then enter the device that is used to send block signal; Send block signal to master switch;
Be used to send the device of trip command; The tripping operation of control switch-dividing;
And enter the described device that is used to return; Promptly enter main program, other work of continuation system;
Described master switch middle controller module comprises:
Be used to judge whether the device of short-circuit signal; Controller module obtains three phase voltages that signal acquisition module is gathered, two phase currents, and zero-sequence current and residual voltage signal, and the signal of gathering judged;
If there is not short-circuit signal, entering variable i=0 then, the device of j=0; The initial value that this process is judged is set, prepares for rejudge next time;
And enter the device that is used to return; Promptly return main program, other work of continuation system is a work period with other tasks of system, re-executes the described device that is used to judge whether short-circuit signal once more;
If short-circuit signal is arranged, the device of entering variable i=i+1 then; I is used for waiting for the time-delay variable that receives block signal;
Be used for judgment variable i whether greater than 10 device; Judge to wait for whether delay time reaches setting-up time, i.e. 10 of system work periods;
If variable i is not more than 10, then enter the described device that is used to return; Promptly return main program, other work of continuation system;
If variable i greater than 10, then enters the device that is used to judge whether to receive block signal; After time-delay reaches given time, judge whether master switch receives the block signal that switch-dividing sends;
If do not receive block signal, then enter the device that is used to send trip command; Think that promptly short circuit or over current fault have partly taken place the control circuit of master switch, master switch trips to protect whole circuit;
If receive block signal, the device of entering variable j=j+1 then; Receive block signal, represent that promptly switch-dividing is short-circuited or over current fault, need to wait for the switch-dividing tripping operation, j is the time-delay variable that is used for waiting for the switch-dividing tripping operation;
Be used for judgment variable j whether greater than 35 device; Judge whether time-delay reaches given time, i.e. 35 of system work periods;
If variable j is not more than 35, then enter the described device that is used to return; Promptly return main program, other work of continuation system;
If j, then enters the described device that is used to send trip command greater than 35; The mechanical response time of waiting for the switch-dividing tripping operation arrives, if switch-dividing breaks down, does not trip in the response time, and then master switch tripping operation is to protect whole circuit;
And enter the described device that is used to return, promptly return main program, other work of continuation system.
Described signal acquisition module is by one to seven Acquisition Circuit that structure is identical and connect and form; Described Acquisition Circuit is by miniature electric current, voltage changer, first voltage stabilizing didoe, second voltage stabilizing didoe, inductance, feedback capacity, electric capacity, output resistance is formed, described miniature electric current, the input of voltage changer obtains acquired signal, floating earth signal termination is received floating ground voltage, this miniature electric current, the first output OUT1 of voltage changer connects an end of described inductance, the other end of inductance is connected with an end of described output resistance, the other end of this inductance also connects an end of described feedback capacity, the other end of this feedback capacity and described miniature electric current, the floating earth signal end of voltage changer connects, described miniature electric current, after the second output OUT2 of voltage changer is connected in series described electric capacity, be connected with an end of described output resistance, the two ends of this electric capacity also are connected in series described first voltage stabilizing didoe and second voltage stabilizing didoe, the negative electrode of this first voltage stabilizing didoe and second voltage stabilizing didoe links to each other, anode connects the two ends of described electric capacity respectively, and the other end of described output resistance outputs signal to described signal processing module.
Described Acquisition Circuit is gathered three phase voltages of master switch or switch-dividing, two phase currents, zero-sequence current and residual voltages respectively, this signal acquisition module can also increase by one road resistance signal collector, gather the resistance signal of switch, can form eight road signals with described acquired signal, eight tunnel conversion of signals are admitted to signal processing module after becoming voltage signal.
Described signal processing module by the A/D modular converter with one to seven follower that structure is identical and connect and form; Described follower is by operational amplifier, electric capacity is formed, the positive input of this operational amplifier is accepted the output signal of described signal acquisition module, be connected with ground behind the described electric capacity of this positive input string, the negative input of described operational amplifier is connected with output, receive the feedback signal of output, this output output analog signal, the output of one to seven follower connects seven input CH0 of described A/D modular converter respectively, CH1, CH2, CH3, CH4, CH5, CH6, described A/D modular converter is a digital signal with analog signal conversion, its output D0, D1, D2, D3, D4, D5, D6, D7 sends to described controller module with digital signal.
Follower makes the input signal of this signal processing module more stable, isolates the influence of front signal acquisition module to processing signals, and the A/D modular converter is to send into controller module after the digital signal with analog signal conversion.
Described controller module is a microprocessor, input P0.16, the P0.17 of this microprocessor, P0.18, P0.19, P0.20, P0.21, P0.22, P0.23 receive the digital signal of described signal processing module output, and this controller module output P0.12, P0.13, P1.24, P1.25 output processing signals are to described Executive Module.
Controller module is judged, is discerned each road signal, sends the control corresponding instruction, realizes the data and the message transmission of switch room.
Described Executive Module is made up of photoelectric isolation module, first relay and second relay; Described photoelectric isolation module is made up of first, second, third, fourth optocoupler, the anode input termination positive supply of described four optocouplers, the negative electrode input obtains described processing signals, wherein be connected with high level after the coil windings of described first relay of collector output string of first optocoupler, first optocoupler is exported first control signal and is given described first relay, the emitter output connects the described second optocoupler collector output, the emitter output head grounding of this second optocoupler; The emitter output of described the 3rd optocoupler and described the 4th optocoupler and is connected ground, two collector outputs also connect together, and go here and there and be connected with high level after the coil windings of described second relay, export second control signal to described second relay;
The two ends output control signal of the described first relay normally open switch is given described master switch or described switch-dividing; The two ends of described second relay normally open switch and normally closed switch are all exported control signal and are given described master switch or described switch-dividing; The tripping operation of control master switch or switch-dividing.
The remarkable result of this invention is: voltage, electric current, zero-sequence current, residual voltage and the resistance signal at energy comprehensive detection master switch and switch-dividing place; effectively discern the line fault at different switches place; prevent the device of overstep tripping; even certain switch-dividing causes tripping operation because of short trouble; protective device also can well be discerned; can not cause the tripping operation of master switch, ensure the operate as normal of other branch roads.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is a switch-dividing defence program flow chart of the present invention;
Fig. 3 is a master switch defence program flow chart of the present invention;
Fig. 4 is the circuit theory diagrams of signal acquisition module;
Fig. 5 is the circuit theory diagrams of signal processing module;
Fig. 6 is the circuit theory diagrams of controller module;
Fig. 7 is the circuit theory diagrams of Executive Module;
Fig. 8 is a CAN chip circuit schematic diagram;
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 1:
A kind of anti-overstep tripping system, comprise master switch 1 and switch-dividing 2, on described master switch 1 and described switch-dividing 2 the high pressure comprehensive protection device is installed all, described high pressure comprehensive protection device is made up of signal acquisition module 3, signal processing module 4, controller module 5 and Executive Module 6; Described acquisition module 3 acquired signal also send to described signal processing module 4, after handling, 4 pairs of acquired signal of described signal processing module send into described controller module 5,5 pairs of signals of described controller module are differentiated, output is differentiated the result and is given described Executive Module 6, and described Executive Module 6 is controlled the described master switch 1 and 2 work of described switch-dividing at its place respectively;
Wherein, as shown in Figure 8:
The receiving terminal RXD and the TXD that are connected with a CAN chip CTM1050T7 at the controller module 5 output P0.25 and the TD1 of described switch-dividing 2; The transmitting terminal RXD and the TXD that are connected with the 2nd CAN chip CTM1050T8 at the controller module 5 input P0.25 and the TD1 of described master switch 1; A described CAN chip CTM1050T7 output CANH links to each other with CANL with the receiving terminal CANH of described the 2nd CAN chip CTM1050T8 respectively with CANL.
The one CAN chip CTM1050T7 and the 2nd CAN chip CTM1050T8 transmit block signal, and be more stable, rapider.
As shown in Figure 2:
Be used to judge whether the device of short-circuit signal; Controller module 5 obtains three phase voltages that signal acquisition module 3 is gathered, two phase currents, and zero-sequence current and residual voltage signal, and these seven signals are judged;
If there is not short-circuit signal, then enter the device that is used to return; Promptly enter in the main program, other work of continuation system are a work period with other tasks of system, re-execute the described device that is used to judge whether short-circuit signal once more;
If short-circuit signal is arranged, then enter the device that is used to send block signal; Send block signal to master switch;
Be used to send the device of trip command; The tripping operation of control switch-dividing;
And enter the described device that is used to return; Promptly enter main program, other work of continuation system;
As shown in Figure 3:
Described master switch 1 middle controller module 5 comprises:
Be used to judge whether the device of short-circuit signal; Controller module 5 obtains three phase voltages that signal acquisition module 3 is gathered, two phase currents, and zero-sequence current and residual voltage signal, and these seven signals are judged;
If there is not short-circuit signal, entering variable i=0 then, the device of j=0; The initial value that this process is judged is set, prepares for rejudge next time;
And enter the device that is used to return; Promptly return main program, other work of continuation system is a work period with other tasks of system, re-executes the described device that is used to judge whether short-circuit signal once more;
If short-circuit signal is arranged, the device of entering variable i=i+1 then; I is used for waiting for the time-delay variable that receives block signal;
Be used for judgment variable i whether greater than 10 device; Judge to wait for whether delay time reaches setting-up time, i.e. 10 of system work periods;
If variable i is not more than 10, then enter the described device that is used to return; Promptly return main program, other work of continuation system;
If variable i greater than 10, then enters the device that is used to judge whether to receive block signal; After time-delay reaches given time, judge whether master switch 1 receives the block signal that switch-dividing 2 sends;
If do not receive block signal, then enter the device that is used to send trip command; Think that promptly short circuit or over current fault have partly taken place the control circuit of master switch 1, master switch 1 tripping operation is to protect whole circuit;
If receive block signal, the device of entering variable j=j+1 then; Receive block signal, represent that promptly switch-dividing 2 is short-circuited or over current fault, need to wait for switch-dividing 2 tripping operations, j is the time-delay variable that is used for waiting for switch-dividing 2 tripping operations;
Be used for judgment variable j whether greater than 35 device; Judge whether time-delay reaches given time, i.e. 35 of system work periods;
If variable j is not more than 35, then enter the described device that is used to return; Promptly return main program, other work of continuation system;
If j, then enters the described device that is used to send trip command greater than 35; The mechanical response time of waiting for the switch-dividing tripping operation arrives, if switch-dividing breaks down, does not trip in the response time, and then master switch tripping operation is to protect whole circuit;
And enter the described device that is used to return, promptly return main program, other work of continuation system.
As shown in Figure 4:
Described signal acquisition module 3 is by the identical Acquisition Circuit of seven structures and connect and form; Described Acquisition Circuit is by miniature electric current, voltage changer U1, the first voltage stabilizing didoe D1, the second shaping diode D2, inductance L, feedback capacity C1, capacitor C 2,4.3K output resistance R1 forms, described miniature electric current, voltage changer IUT selects the LXYO/WGSLO/LXLC family chip for use, the input of this chip obtains acquired signal, floating earth signal termination is received floating ground voltage, the first output OUT1 connects an end of described inductance L, the other end of described inductance L is connected with the end of described 4.3K output resistance R1, the other end of this inductance L also connects the end of described feedback capacity C1, the other end of this feedback capacity C1 and described miniature electric current, the floating earth signal end of voltage changer U1 connects, described miniature electric current, after the second output OUT2 of voltage changer U1 is connected in series described capacitor C 2, be connected with the end of described 4.3K output resistance R1, the two ends of this capacitor C 2 also are connected in series the described first voltage stabilizing didoe D1 and the second voltage stabilizing didoe D2, the negative electrode of this first voltage stabilizing didoe D1 and the second voltage stabilizing didoe D2 links to each other, anode connects the two ends of described capacitor C 2 respectively, and the other end of described 4.3K output resistance R1 outputs signal to described signal processing module 4.
Described Acquisition Circuit is gathered three phase voltages of master switch 1 or switch-dividing 2, two phase currents, zero-sequence current and residual voltages respectively, this signal acquisition module 3 can also increase by one road resistance signal collector, gather the resistance signal of switch, can form eight road signals with described acquired signal, eight tunnel conversion of signals are admitted to signal processing module 4 after becoming voltage signal.
As shown in Figure 5:
Described signal processing module 4 is by the A/D modular converter MAX197BCA1ADT follower identical with seven structures and connect and form; Described follower is made up of operational amplifier TL084BCDTS and capacitor C 3, the positive input of this operational amplifier TL084BCDTS is accepted the output signal of described signal acquisition module 3, the described capacitor C of this positive input string 3 backs are connected with ground, the negative input of described operational amplifier TL084BCDTS is connected with output, receive the feedback signal of output, this output output analog signal, the output of seven followers connects seven input CH0 of described A/D modular converter ADT respectively, CH1, CH2, CH3, CH4, CH5, CH6, described A/D modular converter MAX197BCA1ADT is a digital signal with analog signal conversion, its output D0, D1, D2, D3, D4, D5, D6, D7 sends to described controller module 5 with digital signal.
Follower makes the input signal of this signal processing module 4 more stable, isolates the influence of 3 pairs of processing signals of front signal acquisition module, and A/D modular converter ADT is to send into controller module 5 after the digital signal with analog signal conversion.
As shown in Figure 6:
Described controller module 5 is microprocessor ARM7, its input P0.16, P0.17, P0.18, P0.19, P0.20, P0.21, P0.22, P0.23 receive the digital signal of described signal processing module 4 outputs, and this controller module 5 output P0.12, P0.13, P1.24, P1.25 output processing signals are to described Executive Module 6.
As shown in Figure 7:
Described Executive Module 6 is made up of photoelectric isolation module GP, the first relay J P1 and the second relay J P2; Described photoelectric isolation module GP is made up of first, second, third, fourth optocoupler GC1, GC2, GC3, GC4, the anode input termination positive supply of described four optocoupler GC1, GC2, GC3, GC4, the negative electrode input obtains described processing signals, wherein be connected with high level after the coil windings of the described first relay J P1 of collector output string of the first optocoupler GC1, the first optocoupler GC1 exports first control signal and gives the described first relay J P1, the emitter output connects the described second optocoupler GC2 collector output, the emitter output head grounding of this second optocoupler GC2; The emitter output of described the 3rd optocoupler GC3 and described the 4th optocoupler GC4 also is connected ground, two collector outputs also connect together, and go here and there and be connected with high level after the coil windings of the described second relay J P2, export second control signal and give the described second relay J P2;
The two ends output control signal of the described first relay J P1 normal open switch is given described master switch 1 or described switch-dividing 2; The two ends of described second relay J P2 normal open switch and normally closed switch are all exported control signal and are given described master switch 1 or described switch-dividing 2; The tripping operation of control master switch 1 or switch-dividing 2.
Operation principle of the present invention is as follows: the fault if certain switch-dividing control branch road is short-circuited, the switch-dividing protector will send a block signal at once, simultaneously send trip signal to switch-dividing, by the CAN bus, block signal is transferred to the protector of master switch fast; The master switch protector judges whether to receive block signal within a short period of time; if receive; after then time-delay is waited for a period of time; judge whether switch-dividing trips, if switch-dividing not tripping operation during this period of time, then the master switch protector sends trip command to master switch; protect whole circuit; if switch-dividing trips, the master switch protector plays the effect that prevents overstep tripping because the disappearance of fault current just can not sent trip signal yet.
If the switch-dividing number of master switch control two and more than, each switch-dividing is identical with present embodiment with the connection and the working method of master switch.
Claims (5)
1. anti-overstep tripping system, comprise master switch (1) and switch-dividing (2), on described master switch (1) and described switch-dividing (2) the high pressure comprehensive protection device is installed all, described high pressure comprehensive protection device is made up of signal acquisition module (3), signal processing module (4), controller module (5) and Executive Module (6); Described acquisition module (3) acquired signal also sends to described signal processing module (4), after handling acquired signal, described signal processing module (4) sends into described controller module (5), described controller module (5) is differentiated signal, output is differentiated the result and is given described Executive Module (6), and described Executive Module (6) is controlled the described master switch (1) and described switch-dividing (2) work at its place respectively;
It is characterized in that: receiving terminal RXD and TXD that controller module (5) output P0.25 and the TD1 in described switch-dividing (2) is connected with a CAN chip (7); Transmitting terminal RXD and TXD that controller module (5) input P0.25 and TD1 in described master switch (1) is connected with the 2nd CAN chip (8); Described CAN chip (a 7) output CANH links to each other with CANL with the receiving terminal CANH of described the 2nd CAN chip (8) respectively with CANL.
Controller module (5) in the described switch-dividing (2) comprising:
Be used to judge whether the device of short-circuit signal;
If there is not short-circuit signal, then enter the device that is used to return;
If short-circuit signal is arranged, then enter the device that is used to send block signal;
Be used to send the device of trip command;
And enter the described device that is used to return;
Control module (5) in the described master switch (1) comprising:
Be used to judge whether the device of short-circuit signal;
If there is not short-circuit signal, entering variable i=0 then, the device of j=0;
And enter the device that is used to return;
If short-circuit signal is arranged, the device of entering variable i=i+1 then;
Be used for judgment variable i whether greater than 10 device;
If variable i is not more than 10, then enter the described device that is used to return;
If variable i greater than 10, then enters the device that is used to judge whether to receive block signal;
If do not receive block signal, then enter the device that is used to send trip command;
If receive block signal, the device of entering variable j=j+1 then;
Be used for judgment variable j whether greater than 35 device;
If variable j is not more than 35, then enter the described device that is used to return;
If j, then enters the described device that is used to send trip command greater than 35;
And enter the described device that is used to return.
2. according to the described anti-overstep tripping system of claim 1, it is characterized in that: described signal acquisition module (3) is by one to seven Acquisition Circuit that structure is identical and connect and form; Described Acquisition Circuit is by miniature electric current, voltage changer (U1), first voltage stabilizing didoe (D1), second voltage stabilizing didoe (D2), inductance (L), feedback capacity (C1), electric capacity (C2), output resistance (R1) is formed, described miniature electric current, the input of voltage changer (U1) obtains acquired signal, floating earth signal termination is received floating ground voltage, this miniature electric current, the first output OUT1 of voltage changer (U1) connects an end of described inductance (L), the other end of inductance (L) is connected with an end of described output resistance (R1), the other end of this inductance (L) also connects an end of described feedback capacity (C1), the other end of this feedback capacity (C1) and described miniature electric current, the floating earth signal end of voltage changer (U1) connects, described miniature electric current, after the second output OUT2 of voltage changer (U1) is connected in series described electric capacity (C2), be connected with an end of described output resistance (R1), the two ends of this electric capacity (C2) also are connected in series described first voltage stabilizing didoe (D1) and second voltage stabilizing didoe (D2), the negative electrode of this first voltage stabilizing didoe (D1) and second voltage stabilizing didoe (D2) links to each other, anode connects the two ends of described electric capacity (C2) respectively, and the other end of described output resistance (R1) outputs signal to described signal processing module (4).
3. according to the described anti-overstep tripping system of claim 1, it is characterized in that: described signal processing module (4) by A/D modular converter (ADT) with one to seven follower that structure is identical and connect and form; Described follower is by operational amplifier (TS), electric capacity (C3) is formed, the positive input of this operational amplifier (TS) is accepted the output signal of described signal acquisition module (3), the described electric capacity of this positive input string (C3) back is connected with ground, the negative input of described operational amplifier (TS) is connected with output, receive the feedback signal of output, this output output analog signal, the output of one to seven follower connects seven input CH0 of described A/D modular converter (ADT) respectively, CH1, CH2, CH3, CH4, CH5, CH6, described A/D modular converter (ADT) is a digital signal with analog signal conversion, its output D0, D1, D2, D3, D4, D5, D6, D7 sends to described controller module (5) with digital signal.
4. according to the described anti-overstep tripping system of claim 1, it is characterized in that: described controller module (5) is a microprocessor, input P0.16, the P0.17 of this microprocessor, P0.18, P0.19, P0.20, P0.21, P0.22, P0.23 receive the digital signal of described signal processing module (4) output, and this controller module (5) output P0.12, P0.13, P1.24, P1.25 output processing signals are to described Executive Module (6).
5. according to the described anti-overstep tripping system of claim 1, it is characterized in that: described Executive Module (6) is made up of photoelectric isolation module (GP), first relay (JP1) and second relay (JP2); Described photoelectric isolation module (GP) is by first, second, the 3rd, the 4th optocoupler (GC1, GC2, GC3, GC4) form, described four optocoupler (GC1, GC2,6C3, GC4) anode input termination positive supply, the negative electrode input obtains described processing signals, be connected with high level after the coil windings of described first relay of the collector output string of wherein said first optocoupler (GC1) (JP1), this first optocoupler (GC1) output, first control signal is given described first relay (JP1), the emitter output connects described second optocoupler (GC2) collector output, the emitter output head grounding of this second optocoupler (GC2); The emitter output of described the 3rd optocoupler (GC3) and described the 4th optocoupler (GC4) also is connected ground, two collector outputs also connect together, and go here and there and be connected with high level after the coil windings of described second relay (JP2), export second control signal and give described second relay (JP2);
The two ends output control signal of described first relay (JP1) normal open switch is given described master switch (1) or described switch-dividing (2); The two ends of described second relay (JP2) normal open switch and normally closed switch are all exported control signal and are given described master switch (1) or described switch-dividing (2); The tripping operation of control master switch (1) or switch-dividing (2).
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| CN101552460A (en) * | 2008-12-10 | 2009-10-07 | 杨德林 | Indoor cable head short-circuit protection method |
| CN102510048A (en) * | 2011-10-27 | 2012-06-20 | 深圳市华力特电气股份有限公司 | Anti-override trip protection system |
| CN102790384A (en) * | 2012-09-04 | 2012-11-21 | 上海山源电子电气科技发展有限公司 | Override trip prevention method for supply network |
| CN103022995A (en) * | 2012-12-18 | 2013-04-03 | 中煤科工集团重庆研究院 | Mine override trip prevention method |
| CN110429561A (en) * | 2019-08-28 | 2019-11-08 | 广东华邦创科智能技术有限公司 | A kind of electrical intelligent fire disaster protective device |
-
2007
- 2007-12-20 CN CN2007100931855A patent/CN101207279B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552460A (en) * | 2008-12-10 | 2009-10-07 | 杨德林 | Indoor cable head short-circuit protection method |
| CN102510048A (en) * | 2011-10-27 | 2012-06-20 | 深圳市华力特电气股份有限公司 | Anti-override trip protection system |
| CN102510048B (en) * | 2011-10-27 | 2015-03-18 | 深圳市华力特电气股份有限公司 | Anti-override trip protection method |
| CN102790384A (en) * | 2012-09-04 | 2012-11-21 | 上海山源电子电气科技发展有限公司 | Override trip prevention method for supply network |
| CN102790384B (en) * | 2012-09-04 | 2014-11-19 | 上海山源电子电气科技发展有限公司 | Override trip prevention method for supply network |
| CN103022995A (en) * | 2012-12-18 | 2013-04-03 | 中煤科工集团重庆研究院 | Mine override trip prevention method |
| CN110429561A (en) * | 2019-08-28 | 2019-11-08 | 广东华邦创科智能技术有限公司 | A kind of electrical intelligent fire disaster protective device |
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| CN101207279B (en) | 2011-06-15 |
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