CN104332975A - Networked mining advanced switch comprehensive protection measuring and controlling device - Google Patents
Networked mining advanced switch comprehensive protection measuring and controlling device Download PDFInfo
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- CN104332975A CN104332975A CN201410582362.6A CN201410582362A CN104332975A CN 104332975 A CN104332975 A CN 104332975A CN 201410582362 A CN201410582362 A CN 201410582362A CN 104332975 A CN104332975 A CN 104332975A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The invention discloses a networked mining advanced switch comprehensive protection measuring and controlling device, and relates to the field of measuring and controlling devices. The networked mining advanced switch comprehensive protection measuring and controlling device comprises a shell, a display device, a control device and an alarm device are mounted on the shell, a measuring and controlling device is further arranged in the shell, connected into a power grid and connected with the display device, the control device, a remote data transmission device, the alarm device and a tripping device, the control device comprises an infrared control device, the measuring and controlling device comprises a main control chip, and an over-current protection circuit, an over prevention tripping circuit, an overload alarm circuit, an electric leakage protection circuit, a PT wire break alarm circuit, a zero-sequence over-voltage alarm circuit, a low-voltage protection circuit, an over-voltage protection circuit, a low-frequency protection circuit and a tripping circuit are connected onto the main control chip. The networked mining advanced switch comprehensive protection measuring and controlling device has complete functions and high integration degree, and can realize wireless remote control.
Description
Technical field
The present invention relates to a kind of measure and control device, particularly relate to the mining height of a kind of network-type and open integrated protection and monitoring device.
Background technology
Microcomputer monitor and protection device is the senior Multifunctional integrated protector of power switch in confession, transformer substation system, can play monitoring and protective effect to electrical network and equipment.
Old-fashioned mining synthetic protection monitoring apparatus of the prior art, integrated degree is low, install and use complexity, insufficiency face.
Summary of the invention
The invention discloses the mining height of a kind of network-type and open integrated protection and monitoring device, in order to solve old-fashioned mining synthetic protection monitoring apparatus of the prior art, integrated degree is low, install and use complexity, the problem in insufficiency face.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
The mining height of a kind of network-type opens integrated protection and monitoring device, wherein, comprise a housing, described housing is provided with a display unit, one control device, one warning device, in described housing, also there is a measure and control device, described measure and control device access electrical network, described measure and control device and described display unit, described control device, described remote data transmission device, described warning device and described tripgear connect, described control device comprises: an infrared control device, described measure and control device comprises: a Master control chip, described Master control chip is connected with current foldback circuit, anti-overstep tripping circuit, overload warning circuit, leakage protection circuit, PT break alarm circuit, zero sequence over voltage alarm circuit, low voltage protection circuit, excess voltage protection, low-frequency protection circuit, trip circuit.
Network-type as above is mining, and height opens comprehensive protector, and wherein, described measure and control device also comprises: described Master control chip is also connected with shielded type cable insulating monitoring protective device, abnormality alarming device, measurement mechanism, tape deck.
Network-type as above is mining, and height opens comprehensive protector, and wherein, described Master control chip is connected with a teledata R-T unit.
Network-type as above is mining, and height opens comprehensive protector, and wherein, described current foldback circuit comprises: current quick-breaking circuit, in limited time quick-break circuit, current foldback circuit, described current quick-breaking circuit comprises one first or door, described first or the input of door judge that port obtains electric current from described electrical network by three-phase current, described first or the output of door be connected with one first switch, described first switch is connected with described warning device and described trip circuit, described quick-break circuit in limited time comprises one second or door, described second or the input of door judge that port obtains electric current from described electrical network by three-phase current, described second or the output of door be connected with a second switch and a timer, the output of described timer is connected with described warning device and described trip circuit, described current foldback circuit comprises a line voltage and judges that port, a PI disconnection signal port, a negative sequence voltage judge port, one the 3rd or the input of door judge that port, described PI disconnection signal port, described negative sequence voltage judge that port is connected respectively with described line voltage, one first judge port with described line voltage respectively with two inputs of door, described negative sequence voltage judges that port is connected, described first is connected with the input of the described 3rd or door with the output of door, also comprise one the 4th or door, described 4th or the input of door judge that port obtains electric current from described electrical network by three-phase current, described 4th or the output of door there is one the 3rd switch, described 3rd or door, described 4th or Men Yuyi second be connected with the input of door, described second is parallel with one second timer and an IDMT relay with the output of door, described second timer is in series with one the 4th switch, described IDMT relay is in series with one the 5th switch, described second timer is connected with described warning device and described trip circuit with after the parallel connection of described IDMT relay output end.
Network-type as above is mining, and height opens comprehensive protector; wherein; described overload acknowledge circuit comprises: one the 5th or door; described 5th or the input of door judge that port obtains electric current from described electrical network by three-phase current; described 5th or the output of door be sequentially connected in series one the 6th switch, one the 3rd timer, the output of described 3rd timer is connected with warning device.
Network-type as above is mining, and height opens comprehensive protector, wherein, described leakage protection circuit comprises: one the 7th switch, one first residual voltage judge port, the input of one first not gate is connected with described 7th switch, with described 7th switch, described first residual voltage, one the 3rd judges that port is connected with the input of door, described first not gate is all connected with the input of the 6th or door with the output of door with the described 3rd; One the 8th switch, a zero sequence direction judge input, the input of one second not gate is connected with described 8th switch, with described 8th switch, described zero sequence direction, one the 4th judges that input is connected with the input of door, described second not gate is all connected with the input of the 7th or door with the output of door with the described 4th; Also comprise a zero-sequence current and judge port, one the 5th with the input of door with the described 6th or door, the described 7th or door, described zero-sequence current judge that port is connected, described 5th is connected with one the 4th timer with the output of door, and the output of described 4th timer is connected with described warning device and described tripgear.
Network-type as above is mining, and height opens comprehensive protector, wherein, described PT break alarm circuit comprises: three-phase line voltage judges port, three-phase phase current judges port, negative sequence voltage judges port, with three-phase line voltage, one the 6th judges that port is connected with the input of door, one the 8th or the input of door judge that port is connected with three-phase phase current, one the 7th with the input of door and the described 6th and door, described 8th or door output connect, one the 9th or the input of door judge that port is connected with the described 7th with the output of door and described negative sequence voltage, described 9th or the output of door and one the 9th switch, one the 5th timer connects, the output of described 5th timer is connected with described warning device and described tripgear.
Network-type as above is mining, and height opens comprehensive protector; wherein; described zero sequence overcurrent protection circuit comprises: 1 the tenth switch, one second residual voltage judge port; with described tenth switch, described second residual voltage, one the 8th judges that port is connected respectively with the input of door; described second residual voltage judges that the output of port is connected with one the 6th timer, and the output of described 6th timer is connected with described warning device and described tripgear.
Network-type as above is mining, and height opens comprehensive protector, and wherein, described low voltage protection circuit comprises: comprise the first three-phase voltage and judge that port is connected with the input of door with one the 9th; One trip position port, a PT broken string port, described PT broken string port is connected with described PT break alarm circuit, input and described trip position port, the described PT of the one first NOR gate port that breaks is connected, described 9th is connected with the input of door with 1 the tenth with the output of described first NOR gate with the output of door, described tenth is in series with 1 the 11 switch, one the 7th timer with the output of door, and the output of described 7th timer is connected with described warning device and described tripgear;
Described excess voltage protection comprises: the second three-phase voltage judges port, trip position port; 1 the tenth or the input of door judge that port is connected with described second three-phase voltage; the input of one the 3rd not gate is connected with described trip position port; described 3rd not gate, the described tenth or the output of door be connected with the output of door with 1 the 11; described 11 to be in series with the output of door that a twelvemo is closed, the 8th timer, and the output of described 8th timer is connected with described warning device and described tripgear.
Network-type as above is mining, and height opens comprehensive protector, wherein, described low-frequency protection circuit comprises: 1 the 13 switch, one the 3rd three-phase voltage judge port, 1 the 14 switch, a slippage port, a power port, the input of one the 4th not gate is connected with described 13 switch, with described 13 switch, described 3rd three-phase voltage, 1 the 12 judges that port is connected with the input of door, 1 the 11 or the input port of door be connected with the input port of door with described 4th not gate, the described 12, the input of one the 5th not gate is connected with described 14 switch, 1 the 13 with the input of door and the 14 switch, described slippage port connects, 1 the 12 or the input of door and described 5th not gate, the 13 to be connected with the output of door, 1 the 14 with the input of door and the described 12 or door, described slippage port connects, described 14 is connected with 1 the 15 switch with the output of door, 1 the 15 with the input of door and the 15 switch, 11 or door input connect, described 11 or the output of door be connected with the input of the 9th timer, the output of described 9th timer is connected with described warning device and described tripgear.
In sum, owing to have employed technique scheme, the invention solves mining synthetic protection monitoring apparatus old-fashioned in prior art; integrated degree is low, install and use complexity, the problem in insufficiency face, and the present invention has complete function; integrated degree is high, and can realize long distance wireless will control.
Accompanying drawing explanation
Fig. 1 is the logic diagram that the mining height of network-type of the present invention opens the current quick-breaking circuit of integrated protection and monitoring device;
Fig. 2 is the logic diagram that the mining height of network-type of the present invention opens the quick-break circuit in limited time of integrated protection and monitoring device;
Fig. 3 is the logic diagram that the mining height of network-type of the present invention opens the current foldback circuit of integrated protection and monitoring device;
Fig. 4 is the anti-overstep tripping schematic diagram that the mining height of network-type of the present invention opens integrated protection and monitoring device;
Fig. 5 is the logic diagram that the mining height of network-type of the present invention opens the overload acknowledge circuit of integrated protection and monitoring device;
Fig. 6 is the logic diagram that the mining height of network-type of the present invention opens the leakage protection circuit of integrated protection and monitoring device;
Fig. 7 is the logic diagram that the mining height of network-type of the present invention opens the PT break alarm circuit of integrated protection and monitoring device;
Fig. 8 is the logic diagram that the mining height of network-type of the present invention opens the zero sequence over voltage alarm circuit of integrated protection and monitoring device;
Fig. 9 is the logic diagram that the mining height of network-type of the present invention opens the low voltage protection circuit of integrated protection and monitoring device;
Figure 10 is the logic diagram that the mining height of network-type of the present invention opens the excess voltage protection of integrated protection and monitoring device;
Figure 11 is the logic diagram that the mining height of network-type of the present invention opens integrated protection and monitoring device low-frequency protection circuit.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further:
The mining height of a kind of network-type opens integrated protection and monitoring device, wherein, comprise a housing, housing is provided with a display unit, one control device, one warning device, in housing, also there is a measure and control device, measure and control device access electrical network, measure and control device and display unit, control device, remote data transmission device, warning device and tripgear connect, control device comprises: an infrared control device, measure and control device comprises: a Master control chip, Master control chip is connected with current foldback circuit, anti-overstep tripping circuit, overload warning circuit, leakage protection circuit, PT break alarm circuit, zero sequence over voltage alarm circuit, low voltage protection circuit, excess voltage protection, low-frequency protection circuit, trip circuit.
Measure and control device of the present invention also comprises: Master control chip is also connected with shielded type cable insulating monitoring protective device, abnormality alarming device, measurement mechanism, tape deck.
Master control chip of the present invention is connected with a teledata R-T unit.
Fig. 1 is the logic diagram that the mining height of network-type of the present invention opens the current quick-breaking circuit of integrated protection and monitoring device, Fig. 2 is the logic diagram that the mining height of network-type of the present invention opens the quick-break circuit in limited time of integrated protection and monitoring device, Fig. 3 is the logic diagram that the mining height of network-type of the present invention opens the current foldback circuit of integrated protection and monitoring device, refer to Fig. 1 ~ Fig. 3, current foldback circuit comprises: current quick-breaking circuit, in limited time quick-break circuit, current foldback circuit; Current quick-breaking circuit comprises one first or door, first or the input of door judge that port obtains electric current from electrical network by three-phase current, first or the output of door be connected with one first switch, the first switch is connected with warning device and trip circuit; Quick-break circuit comprises one second or door in limited time, second or the input of door judge that port obtains electric current from electrical network by three-phase current, second or the output of door be connected with a second switch and a timer, the output of timer is connected with warning device and trip circuit; Current foldback circuit comprises a line voltage and judges that port, a PI disconnection signal port, a negative sequence voltage judge port, one the 3rd or the input of door judge that port, PI disconnection signal port, negative sequence voltage judge that port is connected respectively with line voltage; One first judge port with line voltage respectively with two inputs of door, negative sequence voltage judges that port is connected, first is connected with the input of the 3rd or door with the output of door; Also comprise one the 4th or door, 4th or the input of door judge that port obtains electric current from electrical network by three-phase current, 4th or the output of door there is one the 3rd switch, 3rd or door, the 4th or Men Yuyi second be connected with the input of door, second is parallel with one second timer and an IDMT relay with the output of door, second timer is in series with one the 4th switch, IDMT relay is in series with one the 5th switch, the second timer is connected with warning device and trip circuit with after the parallel connection of IDMT relay output end.
For A, C(or A, B, C) phase current first-harmonic maximum, reach setting value mutually when arbitrary, then timer starts; if last till adjust time limit; and the throwing of corresponding protection is moved back control word and is in input state, device then sends tripping operation control signal, and record and upload corresponding SOE event.If electric current returns in adjust time limit, reset timer.Wherein overcurrent protection is by compound voltage lockout; and the inverse time lag can be selected to trip; according to the regulation of IEC (IEC60255-4), this device can three kinds of anti-time limit characteristics in choice criteria anti-time limit characteristic equation: select by definite value
General anti-time limit characteristic equation (IDMT):
Very anti-time limit characteristic equation (IDMT):
Extreme anti-time limit characteristic equation (IDMT):
+ 8
In formula, Ip is current reference value, gets overcurrent definite value,
for time constant, get overcurrent time definite value.
Fig. 4 is the anti-overstep tripping schematic diagram that the mining height of network-type of the present invention opens integrated protection and monitoring device, refers to Fig. 4, and anti-overstep tripping circuit of the present invention specifically can be connected with CAN by the optical fiber between device, realizes anti-overstep tripping function.When subordinate's protection detects autoprotection current break; this device sends a trouble signal by CAN or optical fiber to higher level's protective device at once; the time delay (this definite value can be established) that the higher level receiving trouble signal protects the fast tripping protection one of then locking at once self of short duration, waits for subordinate's trip protection.After time delay, if fault current does not disappear, then higher level's trip protection.In figure below, incoming relay-protection at the corresponding levels is the higher level of protection for feed line at the corresponding levels, and higher level's protection for feed line is the higher level of subordinate's incoming relay-protection.Place on line is used for setting the superior and the subordinate's communication function of each protector, and when being set to 1, CAN is luminous finely receives, and when being set to 2, CAN receives optical fiber and sends out, and when being set to 3, CAN sends out non-fiber, and when there is communication abnormality, the main interface of upper stage arrangement will have communication abnormality to point out.
Fig. 5 is the logic diagram that the mining height of network-type of the present invention opens the overload acknowledge circuit of integrated protection and monitoring device; refer to Fig. 5; overload acknowledge circuit comprises: one the 5th or door; 5th or the input of door judge that port obtains electric current from electrical network by three-phase current; 5th or the output of door be sequentially connected in series one the 6th switch, one the 3rd timer, the output of the 3rd timer is connected with warning device.
For A, C(or A, B, C) phase current first-harmonic maximum, reach overload setting value mutually when arbitrary, then timer starts, if the duration reaches adjust time limit, alarm.If electric current returns in adjust time limit, reset timer, can select alarm still to trip.
Fig. 6 is the logic diagram that the mining height of network-type of the present invention opens the leakage protection circuit of integrated protection and monitoring device, refer to Fig. 6, leakage protection circuit comprises: one the 7th switch, one first residual voltage judge port, the input of one first not gate is connected with the 7th switch, with the 7th switch, the first residual voltage, one the 3rd judges that port is connected with the input of door, the first not gate is all connected with the input of the 6th or door with the output of door with the 3rd; One the 8th switch, a zero sequence direction judge input, the input of one second not gate is connected with the 8th switch, with the 8th switch, zero sequence direction, one the 4th judges that input is connected with the input of door, the second not gate is all connected with the input of the 7th or door with the output of door with the 4th; Also comprise a zero-sequence current and judge port, one the 5th with the input of door with the 6th or door, the 7th or door, zero-sequence current judge that port is connected, 5th is connected with one the 4th timer with the output of door, and the output of the 4th timer is connected with warning device and tripgear.
Earth leakage protective is when zero sequence current measurement value is greater than earth leakage protective definite value, then timer starts, if last till corresponding adjust time limit, and earth leakage protective is thrown and moved back control word and be in input state, then send alarm signal.Move back control word as trip protection throwing and be also in input state, then tripping circuit breaker, and record and upload corresponding SOE event.If electric current returns in adjust time limit, reset timer.
Fig. 7 is the logic diagram that the mining height of network-type of the present invention opens the PT break alarm circuit of integrated protection and monitoring device, refer to Fig. 7, PT break alarm circuit comprises: three-phase line voltage judges port, three-phase phase current judges port, negative sequence voltage judges port, with three-phase line voltage, one the 6th judges that port is connected with the input of door, one the 8th or the input of door judge that port is connected with three-phase phase current, one the 7th with the input of door and the 6th and door, 8th or door output connect, one the 9th or the input of door judge that port is connected with the 7th with the output of door and negative sequence voltage, 9th or the output of door and one the 9th switch, one the 5th timer connects, the output of the 5th timer is connected with warning device and tripgear.
In order to prevent because PT broken string makes CPU detect, magnitude of voltage is abnormal and cause false protection in one embodiment of the invention, and device is furnished with PT continuity test function, throws move back by protecting control word.Meeting arbitrary condition below reports PT to break: a maximum line voltage is less than 30V, and arbitrary phase current is greater than 0.2A;
B negative sequence voltage is greater than 8V;
Fig. 8 is the logic diagram that the mining height of network-type of the present invention opens the zero sequence over voltage alarm circuit of integrated protection and monitoring device; refer to Fig. 8; zero sequence overcurrent protection circuit comprises: 1 the tenth switch, one second residual voltage judge port; with the tenth switch, the second residual voltage, one the 8th judges that port is connected respectively with the input of door; second residual voltage judges that the output of port is connected with one the 6th timer, and the output of the 6th timer is connected with warning device and tripgear.
The residual voltage recorded in Measurement channel of the present invention is greater than residual voltage definite value, through delayed alarm.Logic diagram is shown in (U0dz2 in figure is residual voltage definite value, and t0zd4 is time definite value).
Fig. 9 is the logic diagram that the mining height of network-type of the present invention opens the low voltage protection circuit of integrated protection and monitoring device, and refer to Fig. 9, low voltage protection circuit comprises: comprise the first three-phase voltage and judge that port is connected with the input of door with one the 9th; One trip position port, a PT broken string port, PT broken string port is connected with PT break alarm circuit, input and trip position port, the PT of the one first NOR gate port that breaks is connected, 9th is connected with the input of door with 1 the tenth with the output of the first NOR gate with the output of door, tenth is in series with 1 the 11 switch, one the 7th timer with the output of door, and the output of the 7th timer is connected with warning device and tripgear;
Three-phase line voltage is all less than under-voltage protection definite value, when the time exceedes setting time, and under-voltage protection action.Under-voltage protection is through TWJ locking, and device automatically can identify PT broken string and locking under-voltage protection (now PT broken string needs to drop into).
Figure 10 is the logic diagram that the mining height of network-type of the present invention opens the excess voltage protection of integrated protection and monitoring device, refer to Figure 10, excess voltage protection comprises: the second three-phase voltage judges port, trip position port, 1 the tenth or the input of door judge that port is connected with the second three-phase voltage, the input of one the 3rd not gate is connected with trip position port, 3rd not gate, tenth or the output of door be connected with the output of door with 1 the 11, 11 is in series with a twelvemo with the output of door closes, 8th timer, the output of the 8th timer is connected with warning device and tripgear.
Arbitraryly in three voltages between phases be greater than overvoltage protection definite value mutually, when the time exceedes setting time, overvoltage protection action.
Figure 11 is the logic diagram that the mining height of network-type of the present invention opens integrated protection and monitoring device low-frequency protection circuit, refer to Figure 11, low-frequency protection circuit comprises: 1 the 13 switch, one the 3rd three-phase voltage judge port, 1 the 14 switch, a slippage port, a power port, the input of one the 4th not gate is connected with the 13 switch, with the 13 switch, the 3rd three-phase voltage, 1 the 12 judges that port is connected with the input of door, 1 the 11 or the input port of door be connected with the input port of door with the 4th not gate, the 12, the input of one the 5th not gate is connected with the 14 switch, 1 the 13 with the input of door and the 14 switch, slippage port connects, 1 the 12 or the input of door and the 5th not gate, the 13 to be connected with the output of door, 1 the 14 with the input of door and the 12 or door, slippage port connects, 14 is connected with 1 the 15 switch with the output of door, 1 the 15 with the input of door and the 15 switch, 11 or door input connect, 11 or the output of door be connected with the input of the 9th timer, the output of the 9th timer is connected with warning device and tripgear.When detecting that the frequency of system is lower than UFLS frequency values, voltage higher than (if low-voltage lockout input) during low-voltage lockout definite value, action after time delay.
Shielded type cable insulating monitoring protective device specific works process of the present invention can be: the insulation resistance Rd between shielded type cable heart yearn and shielded type cable ground wire is reduced to:
During Rd<3K Ω, protection action message;
During Rd>5.5K Ω, protection is reliably failure to actuate;
Loop resistance value Rk between shielded type cable heart yearn and shielded type cable ground wire is reduced to:
During Rk>1.5K Ω, protection action message;
During Rk<0.8K Ω, protection is reliably failure to actuate;
Operate time: 100ms
Abnormality alarming device of the present invention is concrete: device is abnormal: power supply disappears or self-inspection makes mistakes (inspection of ROM, RAM, EPROM definite value makes mistakes), and relay is outputed in locking.
Measurement mechanism of the present invention is concrete: measuring system frequency f, voltage U ab, Ubc, Uca, Ua, Ub, Uc, and electric current I a, Ib, Ic and active power, reactive power, power factor, 3I0,3U0, insulation resistance R, is uploaded to host computer.
Tape deck of the present invention is concrete: can store the every record being no less than 60 times, comprises event date, time, fault current (voltage), protection act type etc., and can be sent to management system or supervisory control system.
Claims (10)
1. the mining height of network-type opens integrated protection and monitoring device, it is characterized in that, comprise a housing, described housing is provided with a display unit, one control device, one warning device, in described housing, also there is a measure and control device, described measure and control device access electrical network, described measure and control device and described display unit, described control device, described remote data transmission device, described warning device and described tripgear connect, described control device comprises: an infrared control device, described measure and control device comprises: a Master control chip, described Master control chip is connected with current foldback circuit, anti-overstep tripping circuit, overload warning circuit, leakage protection circuit, PT break alarm circuit, zero sequence over voltage alarm circuit, low voltage protection circuit, excess voltage protection, low-frequency protection circuit, trip circuit.
2. the mining height of network-type according to claim 1 opens comprehensive protector; it is characterized in that, described measure and control device also comprises: described Master control chip is also connected with shielded type cable insulating monitoring protective device, abnormality alarming device, measurement mechanism, tape deck.
3. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described Master control chip is connected with a teledata R-T unit.
4. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described current foldback circuit comprises: current quick-breaking circuit, in limited time quick-break circuit, current foldback circuit, described current quick-breaking circuit comprises one first or door, described first or the input of door judge that port obtains electric current from described electrical network by three-phase current, described first or the output of door be connected with one first switch, described first switch is connected with described warning device and described trip circuit, described quick-break circuit in limited time comprises one second or door, described second or the input of door judge that port obtains electric current from described electrical network by three-phase current, described second or the output of door be connected with a second switch and a timer, the output of described timer is connected with described warning device and described trip circuit, described current foldback circuit comprises a line voltage and judges that port, a PI disconnection signal port, a negative sequence voltage judge port, one the 3rd or the input of door judge that port, described PI disconnection signal port, described negative sequence voltage judge that port is connected respectively with described line voltage, one first judge port with described line voltage respectively with two inputs of door, described negative sequence voltage judges that port is connected, described first is connected with the input of the described 3rd or door with the output of door, also comprise one the 4th or door, described 4th or the input of door judge that port obtains electric current from described electrical network by three-phase current, described 4th or the output of door there is one the 3rd switch, described 3rd or door, described 4th or Men Yuyi second be connected with the input of door, described second is parallel with one second timer and an IDMT relay with the output of door, described second timer is in series with one the 4th switch, described IDMT relay is in series with one the 5th switch, described second timer is connected with described warning device and described trip circuit with after the parallel connection of described IDMT relay output end.
5. the mining height of network-type according to claim 1 opens comprehensive protector; it is characterized in that; described overload acknowledge circuit comprises: one the 5th or door; described 5th or the input of door judge that port obtains electric current from described electrical network by three-phase current; described 5th or the output of door be sequentially connected in series one the 6th switch, one the 3rd timer, the output of described 3rd timer is connected with warning device.
6. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described leakage protection circuit comprises: one the 7th switch, one first residual voltage judge port, the input of one first not gate is connected with described 7th switch, with described 7th switch, described first residual voltage, one the 3rd judges that port is connected with the input of door, described first not gate is all connected with the input of the 6th or door with the output of door with the described 3rd; One the 8th switch, a zero sequence direction judge input, the input of one second not gate is connected with described 8th switch, with described 8th switch, described zero sequence direction, one the 4th judges that input is connected with the input of door, described second not gate is all connected with the input of the 7th or door with the output of door with the described 4th; Also comprise a zero-sequence current and judge port, one the 5th with the input of door with the described 6th or door, the described 7th or door, described zero-sequence current judge that port is connected, described 5th is connected with one the 4th timer with the output of door, and the output of described 4th timer is connected with described warning device and described tripgear.
7. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described PT break alarm circuit comprises: three-phase line voltage judges port, three-phase phase current judges port, negative sequence voltage judges port, with three-phase line voltage, one the 6th judges that port is connected with the input of door, one the 8th or the input of door judge that port is connected with three-phase phase current, one the 7th with the input of door and the described 6th and door, described 8th or door output connect, one the 9th or the input of door judge that port is connected with the described 7th with the output of door and described negative sequence voltage, described 9th or the output of door and one the 9th switch, one the 5th timer connects, the output of described 5th timer is connected with described warning device and described tripgear.
8. the mining height of network-type according to claim 6 opens comprehensive protector; it is characterized in that; described zero sequence overcurrent protection circuit comprises: 1 the tenth switch, one second residual voltage judge port; with described tenth switch, described second residual voltage, one the 8th judges that port is connected respectively with the input of door; described second residual voltage judges that the output of port is connected with one the 6th timer, and the output of described 6th timer is connected with described warning device and described tripgear.
9. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described low voltage protection circuit comprises: comprise the first three-phase voltage and judge that port is connected with the input of door with one the 9th; One trip position port, a PT broken string port, described PT broken string port is connected with described PT break alarm circuit, input and described trip position port, the described PT of the one first NOR gate port that breaks is connected, described 9th is connected with the input of door with 1 the tenth with the output of described first NOR gate with the output of door, described tenth is in series with 1 the 11 switch, one the 7th timer with the output of door, and the output of described 7th timer is connected with described warning device and described tripgear;
Described excess voltage protection comprises: the second three-phase voltage judges port, trip position port; 1 the tenth or the input of door judge that port is connected with described second three-phase voltage; the input of one the 3rd not gate is connected with described trip position port; described 3rd not gate, the described tenth or the output of door be connected with the output of door with 1 the 11; described 11 to be in series with the output of door that a twelvemo is closed, the 8th timer, and the output of described 8th timer is connected with described warning device and described tripgear.
10. the mining height of network-type according to claim 1 opens comprehensive protector, it is characterized in that, described low-frequency protection circuit comprises: 1 the 13 switch, one the 3rd three-phase voltage judge port, 1 the 14 switch, a slippage port, a power port, the input of one the 4th not gate is connected with described 13 switch, with described 13 switch, described 3rd three-phase voltage, 1 the 12 judges that port is connected with the input of door, 1 the 11 or the input port of door be connected with the input port of door with described 4th not gate, the described 12, the input of one the 5th not gate is connected with described 14 switch, 1 the 13 with the input of door and the 14 switch, described slippage port connects, 1 the 12 or the input of door and described 5th not gate, the 13 to be connected with the output of door, 1 the 14 with the input of door and the described 12 or door, described slippage port connects, described 14 is connected with 1 the 15 switch with the output of door, 1 the 15 with the input of door and the 15 switch, 11 or door input connect, described 11 or the output of door be connected with the input of the 9th timer, the output of described 9th timer is connected with described warning device and described tripgear.
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| CN201410582362.6A CN104332975B (en) | 2014-10-28 | 2014-10-28 | Network type mining high-opening comprehensive protection measurement and control device |
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| CN104332975B (en) | 2020-03-27 |
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