CN101071944A - Comprehensive protection device and method for mining hierarchical-locked explosion-isolated vacuum electromagnetic starter - Google Patents
Comprehensive protection device and method for mining hierarchical-locked explosion-isolated vacuum electromagnetic starter Download PDFInfo
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- CN101071944A CN101071944A CN 200710010531 CN200710010531A CN101071944A CN 101071944 A CN101071944 A CN 101071944A CN 200710010531 CN200710010531 CN 200710010531 CN 200710010531 A CN200710010531 A CN 200710010531A CN 101071944 A CN101071944 A CN 101071944A
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Abstract
A integrative protective device and the method of a mineral classification closed explosion suppression vacuum electromagnetic starter were disclosed in this invention, which protective device mainly included simulation quantity gathering circuit taked the CPU circuit as the core, switch quantity input-output circuit, communication circuit, and keyboard liquid crystal indicating circuit in the body case, which characteristic lies in including the circuit which constituted by the classification closed switch movement circuit and the classification closed switch movement recording circuit. The classification closed switch movement circuit is simple, the open and closed condition of classification closed switch was judged by the CPU, the un.cap.ping movement recording characteristic byte or frequency value of power supply cavity or load cavity were saved in nonvolatile memory chip, and passed on the supervisory system of communication circuit. Its integrative protection method provided the judgment method of power supply cavity peccancy uncap, the load cavity peccancy uncap, the normal creep age and tripping.
Description
Technical field
The invention discloses a kind of comprehensive protector and method of mine explosion-suppression feeding switch.The comprehensive protector and the method that relate to the mine explosion-suppression vacuum feed switch, the particularly comprehensive protector of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter and method.
Background technology
The mine explosion-suppression feeding switch that uses under the present coal mine or the comprehensive protector of mine explosion-suppression vacuum feed switch, existing protector based on analog circuit has the comprehensive protector based on single-chip microcomputer and digital display again.It mainly comprises with the cpu circuit being analog acquisition circuit, switching value imput output circuit, telecommunication circuit, the keyboard liquid crystal indicating circuit of core in housing based on the comprehensive protector of single-chip microcomputer and digital display.The electric leakage signal of judgement function is arranged.Also has general defencive function such as short circuit, overload, the phase failure.
Based on number of patent application is the patented technology of 03284896.X and 200420031205.8, and its practical New Name is mining hierarchical-locked explosion-isolated vacuum electromagnetic starter.Under the charged situation of uncapping in power supply input wires chamber or power supply output connection chamber, can realize the graded latch outage; but its comprehensive protector does not but have the charged writing function of uncapping violating the regulations of workman; can't distinguish the tripping operation of normal leakage tripping and graded latch simultaneously, operation against rules information can not upload to supervisory control system naturally.Below " power supply input wires chamber " abbreviate power source cavity as, " power supply output connection chamber " abbreviates load cavity as.
Summary of the invention
Purpose of the present invention; a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining and method are provided; design graded latch switch motion circuit; judge violation information by graded latch switch motion writing circuit charged the uncapping of power source cavity or load cavity during the graded latch action; preserve and upload to supervisory control system, distinguish the graded latch tripping operation.The information of record workman charged switch power supply violating the regulations chamber or load cavity lid.Provide that power source cavity violating the regulations is uncapped, load cavity is violating the regulationsly uncapped, normal leakage tripping is differentiated comprehensive method of protection.
For achieving the above object; a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining is provided; in housing, mainly comprise with the cpu circuit being analog acquisition circuit, switching value imput output circuit, telecommunication circuit, the keyboard liquid crystal indicating circuit of core; be characterised in that, also comprise the circuit that constitutes by graded latch switch motion circuit and graded latch switch motion writing circuit.
The circuit that graded latch switch motion circuit and graded latch switch motion writing circuit constitute is mainly increases a normally closed contact on power source cavity graded latch switch XK1, corresponding PK1 and PK2, insert cpu circuit by graded latch switch motion writing circuit, on load cavity graded latch switch XK2, increase a normal opened contact, corresponding LK1 and LK2 insert cpu circuit by graded latch switch motion writing circuit.
Telecommunication circuit adopts RS485 bus-type circuit or frequency type circuit.
A kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection is provided, be characterised in that, when classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts the frequency type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, and uploading does not work after the agreed frequency signal a uncaps for power source cavity is violating the regulations; P3.0 is a low level, and uploading agreed frequency signal b is that load cavity breaks rules and regulations to uncap.
Its higher level's protective device is received agreed frequency signal a before the tripping operation during r=Rj, receives 0H after the tripping operation
zFrequency signal is that power source cavity breaks rules and regulations to uncap; Receive during insulation resistance r overgauge leak resistance that agreed frequency signal b is that load cavity is violating the regulations and uncaps; Insulation resistance r during standard resistor, receives agreed frequency signal c smaller or equal to electric leakage before the tripping operation, receive 0H after the tripping operation
zFrequency signal is normal leakage tripping.
Wherein a can be 200H
z, b can be 300H
z, c can be 1000H
z
A kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection is provided, be characterised in that, when classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts RS485 bus-type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, and uploading does not work after the agreement attribute byte signal d uncaps for power source cavity is violating the regulations; P3.0 is a low level, and uploading agreement attribute byte signal e is that load cavity breaks rules and regulations to uncap.
Its higher level's protective device is received agreement attribute byte signal d before the tripping operation during r=Rj, tripping operation back communication failure is that power source cavity breaks rules and regulations to uncap; Receive during insulation resistance r overgauge leak resistance that agreement attribute byte signal e is that load cavity is violating the regulations and uncaps; Insulation resistance r during standard resistor, receives agreement attribute byte signal f smaller or equal to electric leakage before the tripping operation, tripping operation back communication failure is normal leakage tripping.
Wherein d can be 01H, and e can be 02H, and f can be FFH.
Beneficial effect of the present invention: graded latch switch motion circuit is simple, judge deciliter state of graded latch switch by CPU, uncap action record attribute byte or frequency values of power source cavity or load cavity is kept in the non-volatile memory chip, uploads supervisory control system by telecommunication circuit.Provide that power source cavity violating the regulations is uncapped, load cavity is violating the regulationsly uncapped, normal leakage tripping is differentiated comprehensive method of protection.
Description of drawings
Accompanying drawing number
101.CPU circuit in the accompanying drawing, 102. analog acquisition circuit, 103. switching value imput output circuits, 104. graded latch switch motion writing circuits, 105. telecommunication circuits, 106. keyboard liquid crystal indicating circuits, 107. graded latch switch motion circuit.
Fig. 1 principle of the invention block diagram;
Fig. 2 graded latch switch motion of the present invention writing circuit schematic diagram;
Fig. 3 graded latch switch motion of the present invention circuit theory diagrams;
Fig. 4 cpu circuit schematic diagram of the present invention;
Fig. 5 analog acquisition circuit theory diagrams of the present invention;
Fig. 6 switching value imput output circuit of the present invention schematic diagram;
Fig. 7 keyboard liquid crystal of the present invention indicating circuit schematic diagram;
Fig. 8 telecommunication circuit schematic diagram of the present invention.
Embodiment
As shown in Figure 1; a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining; in housing, mainly comprise with cpu circuit 101 being analog acquisition circuit 102, switching value imput output circuit 103, telecommunication circuit 105, the keyboard liquid crystal indicating circuit 106 of core; be characterised in that, also comprise the circuit that constitutes by graded latch switch motion circuit 107 and graded latch switch motion writing circuit 104.
As shown in Figure 4, wherein the CPU main element is single-chip microcomputer U1---W77E58 in the cpu circuit, A/D chip U2---AD0848, accurate reference voltage chip U3---TL431, active crystal oscillator U4---12MHz and house dog and storage chip U5---X5045.Filter capacitor C1, C2, C3, C4.34 pin socket J1 between cpu circuit and the liquid crystal keyboard circuit.J2, J3, J4 are jumper switch.When the map interlinking simultaneously of three jumper switchs shows the position, P3.0, corresponding respectively LOADK, POWERK, the CH4GAS of connecting of P3.1, P3.5; When the map interlinking simultaneously of three jumper switchs shows other position, P3.0, corresponding respectively RXD, TXD, the RS485 of connecting of P3.1, P3.5.J5 be the data/address bus correspondence on draw exclusion.
As shown in Figure 5, referring to Fig. 4, the analog quantity of the corresponding input of the analog acquisition circuit A phase current is arranged---IA, B phase current---IB, C phase current---IC, voltage---VSAMPLE, leak resistance---INSUR and gas density---CH4GAS wherein.---IC has adopted range automatic switching circuit to the A phase current for IA, B phase current---IB, C phase current---, be divided into two grades of height,---IABIG, B phase current top grade---IBBIG, C phase current top grade---ICBIG, A phase current low grade---IASMALL, B phase current low grade---IBSMALL, the C phase current low grade---ICSMALL that formed A phase current top grade.
Electric current is high-grade to be example only through capacitance-resistance filter with IABIG, only the rc filter circuit that constitutes through R3, C5.The electric current low grade also needs further to handle, with IASMALL is example, at first pass through the filter circuit that R3, C5 constitute, constitute voltage follow through U6A again, constitute reverse amplification circuit through R6, R7, R12 and U6C again, pass through capacitance C8 again, the rc filter circuit that constitutes through R15, R16, C11 generates A phase current low grade---IASMALL at last.
Voltage---V1, V2 are through voltage-stabiliser tube W1, rectifier bridge Q1, dividing potential drop filtering R23, R24, C14 formation voltage sampled value VSAMPLE.
Electric current and voltage sample value IASMALL, IBSMALL, ICSMALL, IABIG, IBBIG, ICBIG, VSAMPLE enter eight and select multicircuit switch 4051 a---U8, control at gating that---eight under P2.5, P2.6, the P2.7 effect selects a signal X through voltage follow---U7A and direct current biasing---VREF, R21, R22, generate signal---SIGNAL, enter the CH1 of AD0848 at last.The current protection algorithm adopts the direct current sampling algorithm.D1, D2 are used for protecting amplifier.
Electric leakage signal generates leak resistance sampled value INSUR through R25, R26 dividing potential drop behind the U7D voltage follow, directly enter the CH8 of AD0848.D3, D4 are used for protecting amplifier.
The photoelectricity that the gas density frequency signal that is transmitted by gas concentration sensor constitutes through R27, R28, U9 is isolated back generated frequency signal CH4GAS, enters the P3.5 of single-chip microcomputer through jumper switch J4.
As shown in Figure 6, referring to Fig. 4, the switching value of switching value imput output circuit input is respectively online startup feedback---REPLY, startup/stop---START, unit/online---SINGLEM.Switching value enters single-chip microcomputer by photoelectric isolated chip U12, U13, U14 respectively.
The switching value of output is respectively next---NEXT, this machine tripping operation locking---BJ of startup.Both driving processes are identical.To start next---NEXT is an example, when enabling signal NEXT is low level, K1 action that light is every the U10 conducting, through triode---T1 amplifies, and then the drive controlling relay---, its auxiliary contact is as driving output.Reverse parallel connection diode D6, D7 is respectively cooperates with direct current relay K1, K2.
As shown in Figure 8, referring to Fig. 4, telecommunication circuit is 200-1000Hz frequency type and RS485 bus-type.The former is used for and the supervisory control system networking, and the latter is used for debugging.After 200-1000Hz frequency signal FOUT at first drives through not gate U17, through the R43 current limliting, again through intrinsic safety isolating transformer GB,---W2, W3, W4, W5 and current limiting element---R44, R45 and the supervisory control system networking after voltage stabilizing element.The voltage isolation of RS485 communication loop, by DC-DC converter U21---5S5 and filter capacitor C15 form.The photoelectricity of RS485 communication loop is isolated, by photoelectric isolated chip---U18, U19, U20 and attached resistance---R46, R47, R48, R49, R50, R51 form.The transmitting-receiving control chip of RS485 is MAX487---U22, and R52 is a build-out resistor, does not generally connect.
As shown in Figure 7, referring to Fig. 4, keyboard liquid crystal indicating circuit constitutes keyboard and adopts four buttons, is respectively " determining "---KEY1, " on "---KEY2, D score---KEY3, " resetting "---RESET.When no key is pressed, because pull down resistor---R53, R54, R55 enter chip U23---4078 level is a low level, and the output w of U23 is a high level, can not cause interruption.As long as there is key to press, entering chip U23---4078 level will become high level, and the output w of U23 is a low level, can cause interrupt INT O.At this moment the CH2 of AD0848, CH3 and CH4 begin to gather, and then judge that key is pressed.R57 is the contrast adjustment potentiometer of Liquid Crystal Module.J6 is the ten octal sockets that are connected with Liquid Crystal Module.Liquid Crystal Module adopts the Chinese Liquid Crystal Module OCMJ5X10 of the standard that the includes character library of Electronics Co., Ltd. of Jinpeng production.J7 is 34 pin sockets between liquid crystal keyboard circuit and the cpu circuit.Power supply indication loop is made up of current-limiting resistance R59 and power supply indication light-emitting diode L2, and L2 is bright in the back that powers on.Failure indicating circuit is made up of R58, light-emitting diode L1, and high level drives.
Referring to Fig. 2, Fig. 3, the circuit that is made of graded latch switch motion circuit 107 and graded latch switch motion writing circuit 104 is mainly normally closed contact of increase on power source cavity graded latch switch XK1, corresponding PK1 and PK2, insert cpu circuit by graded latch switch motion writing circuit, on load cavity graded latch switch XK2, increase a normal opened contact, corresponding LK1 and LK2 insert cpu circuit by graded latch switch motion writing circuit.
As shown in Figure 2, referring to Fig. 3, Fig. 4, graded latch switch motion writing circuit 104 is corresponding PK1 of the auxiliary normally closed contact of graded latch switch XK1 and PK2.The corresponding light of the connecting and disconnecting of PK1 and PK2 every the conducting of U15 with end, and then change the level value of POWERK, and enter the P3.1 of single-chip microcomputer by jumper switch J3.Corresponding LK1 of the auxiliary normal opened contact of graded latch switch XK2 and LK2.The corresponding light of the connecting and disconnecting of LK1 and LK2 every the conducting of U16 with end, and then change the level value of LOADK, and enter the P3.0 of single-chip microcomputer by jumper switch J2.
The power supply of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining adopts external Switching Power Supply.Switching Power Supply is three tunnel outputs, is respectively VCC ,-5 and+12, wherein VCC have an independence " " DGND, and-5 with+12 shared one " " SGND.+ 12 provide additional dc power supply for earth leakage search/lockout detects.Selected Switching Power Supply requires to select by measure.
Classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining record problem.According to the mining hierarchical-locked explosion-isolated vacuum electromagnetic starter patented technology, to uncap for power source cavity, its normally closed contact is connected in the leak resistance loop.Normally closed contact disconnects during normal operation, if after uncapping then this contact is connected leak resistance, is tripped by the upper level feeding switch.According to standard " MT871-2000 flame-proof mine low-voltage alternating-current vacuum feed switch ", the 1k Ω resistance operate time of higher level's switch, to 1140V, operate time≤50mS; To 660V, operate time≤80mS; To 380V, operate time≤80mS.Actual conditions are, electrical resistance collection time, judgement time and contactor tripping operation intrinsic time are added together, and higher level's feeding switch generally is not less than 20mS operate time.And protective device at the corresponding levels is judged is switching value, and single-chip microcomputer can store and upload fault message before self dead electricity.Uncap for load cavity, its normal opened contact is connected in the control loop.Junction closure is opened in normal operation often, if after uncapping then this contact disconnects vacuum A.C. contactor power failure tripping.Because tripping operation does not influence the power supply of control circuit, so can write down the load cavity locking fault of uncapping.
For supervisory control system, to the tripping operation information of higher level's feeding switch, normal leak current fault can not produce circuit breaker lock information, therefore can distinguish normal electric leakage and because the charged pairing artificial electric leakage of uncapping violating the regulations.Certainly, do not have the operation maintenance under the electric situation, owing to there is not information uploading, supervisory control system can be distinguished.
For clearer technical scheme of the present invention,, introduce the action protection principle of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining referring to Fig. 3:
The basic principle of 1. former mining hierarchical-locked explosion-isolated vacuum electromagnetic starter patented technology
If the charged opening power violating the regulations of workman chamber takes place, then the normally closed contact closure of XK1 is connected leak resistance Rj, causes the higher level to trip, and cuts off the electromagnetic starter power supply, prevents that electric spark from causing gas explosion.
If the charged load cavity of opening violating the regulations of workman takes place, then the normal opened contact of XK2 disconnects, and vacuum A.C. contactor power failure tripping cuts off the electromagnetic starter load, prevents that electric spark from causing gas explosion.
2. the earth leakage search/lockout before mining hierarchical-locked explosion-isolated vacuum electromagnetic starter closes a floodgate
Additional dc power supply+12 positive poles connect the earth, enter electrical network behind insulation resistance r, enter leak resistance measuring junction INSURES through normally closed contact CJ1 again.Size and sample resistance value inverse according to dividing potential drop go out electrical network insulation against ground resistance, if be lower than standard value then by BJ-BJ1, BJ2 locking.
3. the startup of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter
Pass through if earth leakage search/lockout detects, then explanation can start.This moment, BJ1, the BJ2 of BJ correspondence were closed.After load cavity was built, XK1 disconnected, and XK2 is closed.
If for closely control/far controlling switch 1K gets to nearly control, after then pressing start button QA, the control loop conducting, the action of intrinsic safety plug-in unit, the signal relay XJ closure that it is corresponding, vacuum A.C. contactor CJ pull-in winding is charged, the CJ action is closed a floodgate, and enters the START of single-chip microcomputer by CJ2, judge that whether startup is successful, starts and finishes.
If, then start by control button far away for closely control/far controlling switch 1K gets to control far away.Its course of action is identical with nearly control.
4. mining hierarchical-locked explosion-isolated vacuum electromagnetic starter is online
Check unit/on-line switch 2K, be judged as on line state.It is closed that this machine starts back CJ3, through time-delay, starts next, NEXT-NEXT1, NEXT2 action, and the K5 that joint control is used, K6, K7 and next corresponding linking to each other of K1, K2, K3 are equivalent to next is far controlled.
Through time-delay, judge by REPLY whether next starts again, if start then online success, otherwise online failure.
5. the protection of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter
Current protection: current signal enters IA, IB, IC, the DGND end of protector by current transformer LH.
Voltage protection: voltage signal enters V1, the V2 end of protector by the 36V of transformer KB.
Earth leakage search/lockout: the earth leakage search/lockout loop is by additional dc power supply+12, and electrical network insulation against ground resistance, the path CJ1 before closing a floodgate enter the INSURES end of protector.
The gas exceeding limit power-off protection: the gas density signal directly enters CH4GAS1, the CH4GAS2 end of protector.
The graded latch protection: the action situation according to the graded latch switch stores, uploads fault message, acts on tripping operation at the corresponding levels or higher level's tripping operation.
The mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection is as follows:
When classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts the frequency type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, uploads agreed frequency signal 200H
zDo not work afterwards and uncap for power source cavity is violating the regulations; P3.0 is a low level, uploads agreed frequency signal 300H
zUncap for load cavity is violating the regulations; Higher level's protective device is received agreed frequency signal 200H before the tripping operation during r=Rj
z, receive 0H after the tripping operation
zFrequency signal is that power source cavity breaks rules and regulations to uncap; Receive agreed frequency signal 300H during insulation resistance r overgauge leak resistance
zUncap for load cavity is violating the regulations; Insulation resistance r receives agreed frequency signal 1000H during smaller or equal to standard leak resistance before the tripping operation
z, receive 0H after the tripping operation
zFrequency signal is normal leakage tripping.
For realizing the determination methods of the above-mentioned higher level's of relating to protective device, higher level's feeding switch intelligent comprehensive protective device available circuit is realized by software programming by the frequency type interface.
When classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts RS485 bus-type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, and uploading does not work after the agreement attribute byte signal 01H uncaps for power source cavity is violating the regulations; P3.0 is a low level, and uploading agreement attribute byte signal 02H is that load cavity breaks rules and regulations to uncap; Higher level's protective device is received agreement attribute byte signal 01H before the tripping operation during r=Rj, tripping operation back communication failure is that power source cavity breaks rules and regulations to uncap; Receive during insulation resistance r overgauge leak resistance that agreement attribute byte signal 02H is that load cavity is violating the regulations and uncaps; Insulation resistance r receives agreement attribute byte signal FFH during smaller or equal to standard leak resistance before the tripping operation, tripping operation back communication failure is normal leakage tripping.
For realizing the determination methods of the above-mentioned higher level's of relating to protective device, higher level's feeding switch intelligent comprehensive protective device available circuit is realized by software programming by RS485 bus-type interface.
Its concrete comprehensive method of protection also can be referring to following narration:
The power source cavity method of discrimination of uncapping violating the regulations: when the single-chip microcomputer of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels detects P3.1 and becomes high level by low level; illustrate that the POWERK that is attached thereto is a high level; light becomes conducting every U15 from ending; PK1 and PK2 become conducting by disconnection; the normally closed contact that graded latch switch XK1 is described becomes closure by disconnection just often, assert to take place that power source cavity is charged uncaps.Classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels is at first preserved its attribute byte 01H in X5045 in higher level's leakage tripping time, upload information then.Adopt the frequency type circuit, upload the frequency signal of 200Hz; Adopt RS485 type circuit, upload attribute byte 01H.
When higher level's feeding switch protective device detects line insulation resistance r=Rj, adopt the frequency type circuit, receive the frequency signal of 200Hz simultaneously; Adopt RS485 type circuit, receive the attribute byte of 01H simultaneously.Higher level's protective device is assert charged the uncapping of subordinate's switch generation power source cavity.
The load cavity method of discrimination of uncapping violating the regulations: when the single-chip microcomputer of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels detects P3.0 and becomes low level by high level; illustrate that the LOADK that is attached thereto is a low level; light becomes from conducting every U16 and ends; LK1 and LK2 become disconnection by conducting; the normal opened contact that graded latch switch XK2 is described becomes disconnection by closure just often, assert to take place that load cavity is charged uncaps.Its attribute byte 02H is at first preserved in this protection in X5045, upload information then.Adopt the frequency type circuit, upload the frequency signal of 300Hz; Adopt RS485 type circuit, upload attribute byte 02H.
When higher level's feeding switch protective device detects line insulation resistance r overgauge leak resistance,, receive the frequency signal of 300Hz for the frequency type circuit; For RS485 type circuit, receive the attribute byte of 02H.Higher level's protective device is assert charged the uncapping of subordinate's switch generation load cavity.
Normal leakage tripping method of discrimination: before the normal leakage tripping, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels is uploaded normal operation information always.Adopt the frequency type circuit, upload the frequency signal of 1000Hz; Adopt RS485 type circuit, upload attribute byte FFH.
After the normal leakage tripping, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels quits work because of power failure.Adopt the frequency type circuit, can not think that output frequency signal is 0Hz because do not work; Adopt RS485 type circuit, cause communication failure.
When detecting line insulation resistance r smaller or equal to standard leak resistance before the tripping operation of higher level's feeding switch protective device, adopt the frequency type circuit, receive the frequency signal of 1000Hz before the tripping operation, receive the frequency signal of 0Hz after the tripping operation; Adopt RS485 type circuit, receive the attribute byte of FFH before the tripping operation, communication failure takes place in the tripping operation back.Higher level's protective device assert that normal leakage tripping takes place subordinate's switch.
Claims (13)
1. classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining; in housing, mainly comprise with the cpu circuit being analog acquisition circuit, switching value imput output circuit, telecommunication circuit, the keyboard liquid crystal indicating circuit of core, be characterised in that also to comprise the circuit that constitutes by graded latch switch motion circuit and graded latch switch motion writing circuit.
2. the described a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining of claim 1; be characterised in that the circuit that graded latch switch motion circuit and graded latch switch motion writing circuit constitute is mainly normally closed contact of increase on power source cavity graded latch switch XK1; corresponding PK1 and PK2; insert cpu circuit by graded latch switch motion writing circuit; on load cavity graded latch switch XK2, increase a normal opened contact; corresponding LK1 and LK2 insert cpu circuit by graded latch switch motion writing circuit.
3. the described a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining of claim 2 is characterised in that telecommunication circuit adopts RS485 bus-type circuit.
4. the described a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining of claim 2 is characterised in that telecommunication circuit adopts the frequency type circuit.
5. claim 1 or 2 or 3 or 4 described a kind of classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining are characterised in that auxiliary normally closed contact corresponding PK1 and the PK2 of graded latch switch motion writing circuit (104) for graded latch switch XK1.The corresponding light of the connecting and disconnecting of PK1 and PK2 every the conducting of U15 with end, and enter the P3.1 of single-chip microcomputer by jumper switch J3.Corresponding LK1 of the auxiliary normal opened contact of graded latch switch XK2 and LK2.The corresponding light of the connecting and disconnecting of LK1 and LK2 every the conducting of U16 with end, and enter the P3.0 of single-chip microcomputer by jumper switch J2.
6. mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection, be characterised in that when classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts the frequency type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, and uploading does not work after the agreed frequency signal a uncaps for power source cavity is violating the regulations; P3.0 is a low level, and uploading agreed frequency signal b is that load cavity breaks rules and regulations to uncap.
7. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 6 is characterised in that a is 200Hz, and b is 300Hz.
8. mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection, be characterised in that when classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining telecommunication circuit at the corresponding levels adopts RS485 bus-type circuit, classification closedown explosion suppression vacuum electromagnetism starter comprehensive protective device for mining at the corresponding levels, P3.1 is a high level, and uploading does not work after the agreement attribute byte signal d uncaps for power source cavity is violating the regulations; P3.0 is a low level, and uploading agreement attribute byte signal e is that load cavity breaks rules and regulations to uncap.
9. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 8 is characterised in that d is 01H, and e is 02H.
10. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 6 is characterised in that higher level's protective device, receives agreed frequency signal a before the tripping operation during r=Rj, receives after the tripping operation that the OHz frequency signal is that power source cavity is violating the regulations and uncaps; Receive during insulation resistance r overgauge leak resistance that agreed frequency signal b is that load cavity is violating the regulations and uncaps; Insulation resistance r receives agreed frequency signal c during smaller or equal to standard leak resistance before the tripping operation, receive after the tripping operation that the OHz frequency signal is normal leakage tripping.
11. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 8 is characterised in that higher level's protective device, receives agreement attribute byte signal d during r=Rj before the tripping operation, tripping operation back communication failure is that power source cavity breaks rules and regulations to uncap; Insulation resistance r overgauge leak resistance receives that constantly agreement attribute byte signal e is that load cavity is violating the regulations and uncaps; Insulation resistance r receives agreement attribute byte signal f during smaller or equal to standard leak resistance before the tripping operation, tripping operation back communication failure is normal leakage tripping.
12. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 10 is characterised in that a is 200Hz, b is 300Hz, and c is 1000Hz.
13. the described a kind of mining hierarchical-locked explosion-isolated vacuum electromagnetic starter comprehensive method of protection of claim 11 is characterised in that d is 01H, e is 02H, and f is FFH.
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| CN 200710010531 CN101071944A (en) | 2007-03-07 | 2007-03-07 | Comprehensive protection device and method for mining hierarchical-locked explosion-isolated vacuum electromagnetic starter |
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| CN 200710010531 CN101071944A (en) | 2007-03-07 | 2007-03-07 | Comprehensive protection device and method for mining hierarchical-locked explosion-isolated vacuum electromagnetic starter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388538B (en) * | 2008-11-10 | 2012-04-18 | 电光防爆科技股份有限公司 | Stepped locking explosion-proof switch |
| CN111864552A (en) * | 2020-07-03 | 2020-10-30 | 广东电网有限责任公司韶关供电局 | Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device |
-
2007
- 2007-03-07 CN CN 200710010531 patent/CN101071944A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388538B (en) * | 2008-11-10 | 2012-04-18 | 电光防爆科技股份有限公司 | Stepped locking explosion-proof switch |
| CN111864552A (en) * | 2020-07-03 | 2020-10-30 | 广东电网有限责任公司韶关供电局 | Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device |
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