CN205158073U - Cubical switchboard anti -misoperation lockout device - Google Patents
Cubical switchboard anti -misoperation lockout device Download PDFInfo
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- CN205158073U CN205158073U CN201520816276.7U CN201520816276U CN205158073U CN 205158073 U CN205158073 U CN 205158073U CN 201520816276 U CN201520816276 U CN 201520816276U CN 205158073 U CN205158073 U CN 205158073U
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Abstract
Cubical switchboard anti -misoperation lockout device prevents the mistake including cubical switchboard switch electric control lock, cubical switchboard switch auxiliary contact, local cable conductor earthing knife -switch electric control lock, local cable conductor earthing knife -switch auxiliary contact, electric current signal transducer and shutting and observes and controls the unit, and electric current signal transducer is including setting up a current transformer and the 2nd current transformer on the cable shield layer earth connection, the mistake is prevented and observes and controls the unit and link to each other with cubical switchboard switch electric control lock and local cable conductor earthing knife -switch electric control lock respectively including shutting control circuit, auxiliary contact detection circuitry, signal processor, signal generating circuit, signal reception circuit and power module, shutting control circuit that auxiliary contact detection circuitry links to each other with cubical switchboard switch auxiliary contact and local cable conductor earthing knife -switch auxiliary contact respectively to the shutting, signal generating circuit with a current transformer links to each other, and signal reception circuit and the 2nd current transformer link to each other. The utility model discloses the emergence that the reliability is high, the practicality is strong, can effectively prevent the manual operation accident.
Description
Technical field
The utility model relates to a kind of anti-misoperation locking device, particularly relates to a kind of switch cubicle anti-misoperation locking device.
Background technology
Current power distribution network, after line maintenance is complete, power on before, need to confirm deciliter state of grounding switch, comprise the grounding switch of the local grounding switch of cable of switch cubicle and the offside branch road of cable.In prior art, a deciliter state for the grounding switch on the collateral road of cable pair and the grounding switch of switch cubicle carries out feedback acknowledgment by signals such as GPRS/CDMA, or manually go offside far-end to confirm, but these solutions otherwise reliability bad, or to waste time and energy.
Utility model content
The purpose of this utility model is to provide a kind of switch cubicle anti-misoperation locking device that can improve Supply Security and reliability.
To achieve these goals, the utility model takes following technical solution:
Switch cubicle anti-misoperation locking device, comprise: switch of switch cabinet electric control lock, switch of switch cabinet auxiliary contact, local cable grounding switch electric control lock, local cable grounding switch auxiliary contact, current signal sensor and the anti-error measurement and control unit of locking, described switch of switch cabinet electric control lock, switch of switch cabinet auxiliary contact, local cable grounding switch electric control lock, local cable grounding switch auxiliary contact and current signal sensor are connected with the anti-error measurement and control unit of described locking respectively, described current signal sensor comprises the first current transformer and the second current transformer, and described first current transformer and the second current transformer are arranged on cable shielding layer earthing line, the anti-error measurement and control unit of described locking comprises locking control circuit, auxiliary contact testing circuit, signal processor, signal generating circuit, signal receiving circuit and power module, described signal processor respectively with described locking control circuit, auxiliary contact testing circuit, signal generating circuit and signal receiving circuit are connected, described locking control circuit is connected with described switch of switch cabinet electric control lock and local cable grounding switch electric control lock respectively, described auxiliary contact testing circuit is connected with switch of switch cabinet auxiliary contact and local cable grounding switch auxiliary contact respectively, described signal generating circuit is connected with described first current transformer, described signal receiving circuit is connected with the second current transformer.
Further, described first current transformer is straight-through current transformer.
Further, described second current transformer is straight-through current transformer.
Further, the anti-error measurement and control unit of described locking also comprises the display module, load module and the communication interface that are connected with described signal processor.
Further, described signal generating circuit is AC constant-current source circuit for generating.
Further, described signal generating circuit comprises the controlled constant-current source circuit and sine-wave generator that are connected successively, and described controlled constant-current source circuit is connected with described first current transformer, and described sine-wave generator is connected with signal processor.
Further, described sine-wave generator is 23Hz sine-wave generator.
Further, described signal receiving circuit comprises the prime amplifier, low-pass filter and the analog to digital converter that are connected successively, and described prime amplifier is connected with described second current transformer, and described analog to digital converter is connected with signal processor.
From above technical scheme, the utility model is by local cable grounding switch auxiliary contact and switch of switch cabinet auxiliary contact, deciliter state gathering switch of switch cabinet and local cable grounding switch is detected by auxiliary contact testing circuit, by current signal sensor, signal generating circuit and signal receiving circuit gather deciliter state of offside grounding disconnecting link, special current signal is frequently injected in the electric loop formed at cable and cable screen layer by current signal sensor, then the current value in measure loop, to carry out deciliter situation of indirect judgement switch cubicle cable pair collateral road grounding switch with or without the current value of expection, deciliter information that testing circuit or signal receiving circuit collect grounding switch or switch of switch cabinet sends the anti-error measurement and control unit of locking to, the on-load switch of electric control lock latch switch cabinet is controlled when the anti-error observing and controlling unit inspection to cable of locking has grounding switch to close, when confirm switch cubicle same grounding disconnecting link all separating brake could control the switching manipulation hole of electric control lock unlock switch cabinet, the anti-error measurement and control unit of locking is simultaneously by embedded logic control two-way electric control lock mutual exclusion latch switch cabinet switching manipulation hole and local cable grounding switch handle hole, the anti-error measurement and control unit of locking also can further grounding switch deciliter status information, on-load switch deciliter status information, electric control lock status information etc. is presented at LCDs, and be sent to Surveillance center by communication interface.The utility model reliability is high, practical, automaticity is high, effectively can prevent the generation of manual operation accident, provides the switch cubicle anti-misoperation locking scheme that a kind of cost is low, reliability is high, simple to operate.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment, simple introduction is done below by the accompanying drawing used required in embodiment or description of the prior art, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model embodiment.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in more detail.
Embodiment
The Main Function of switch cubicle carries out generating electricity in electric system, transmits electricity, in the process of distribution and electric energy conversion, carries out folding, control and protection consumer.Parts in switch cubicle mainly contain the compositions such as isolating switch, disconnector, on-load switch, operating mechanism, mutual inductor and various protective devices.In order to prevent maloperation, when switch cubicle cable has grounding switch to close, comprise the grounding switch of local cable and offside grounding disconnecting link when closing, can not the switch of Closing Switch cabinet; In the same interval of switch cubicle, the local cable grounding switch of switch cubicle and the switch interlock of switch cubicle.
The utility model is by deciliter situation of the grounding switch on the local cable of detector switch cabinet and the offside branch road of cable, when confirm switch cubicle same grounding disconnecting link all separating brake could the handle hole of unlock switch cabinet switch, and control the handle hole of electric control lock mutual exclusion latch switch cabinet switch and the handle hole of local cable grounding switch, prevent locking by mistake, improve the safety and reliability that switch cubicle runs.
As shown in Figure 1, the switch cubicle anti-misoperation locking device of the present utility model anti-error measurement and control unit 31 of locking that comprises switch of switch cabinet electric control lock 3, switch of switch cabinet auxiliary contact 5, local cable grounding switch electric control lock 6, local cable grounding switch auxiliary contact 8, current signal sensor and be connected with aforementioned components respectively.Switch of switch cabinet electric control lock 3 and local cable grounding switch electric control lock 6 are arranged on switch cabinet panel, be respectively used to the handle hole of locking or unlock switch cabinet switch 4 and local cable grounding switch 7, switch of switch cabinet 4 is on-load switch or disconnector or isolating switch.Current signal sensor comprises for the first current transformer 11 of loading current signal and the second current transformer 12 for gathering current signal, first current transformer 11 and the second current transformer 12 are installed on the cable shielding layer earthing line 14 of switch cubicle cable 2, and the current transformer of the present embodiment adopts straight-through current transformer.Cable shielding layer earthing line 14 is connected with the connecting line 9 of local cable grounding switch 7, by ground wire 13 ground connection by copper bar 10.
The anti-error measurement and control unit 31 of locking comprises locking control circuit 17, display module 18, auxiliary contact testing circuit 19, signal processor 20, load module 21, communication interface 22, signal generating circuit 23, signal receiving circuit 26 and the power module 30 for aforementioned circuit or power elements, and signal processor 20 is connected with locking control circuit 17, display module 18, auxiliary contact testing circuit 19, load module 21, communication interface 22, signal generating circuit 23 and signal receiving circuit 26 respectively.In the present embodiment, load module 21 adopts keyboard; display module 18 is liquid crystal display; signal processor 20 is flush bonding processor; power module 30 can adopt civil power or accumulator or civil power and storage battery power supply complimentary fashion, make switchgear work or maintenance time be all in anti-error guard mode.
Locking control circuit 17 is connected with switch of switch cabinet electric control lock 3 and local cable grounding switch electric control lock 6 respectively, for opening and locking of gauge tap cabinet switch electric control lock 3 and local cable grounding switch electric control lock 6.Auxiliary contact testing circuit 19 is connected with switch of switch cabinet auxiliary contact 5 and local cable grounding switch auxiliary contact 8 respectively, switch of switch cabinet auxiliary contact 5 and local cable grounding switch auxiliary contact 8 are connected and are connected with switch of switch cabinet 4 or local cable grounding switch 7 respectively, and auxiliary contact testing circuit 19 detects switch of switch cabinet 4 or local cable grounding switch 7 folding condition by switch of switch cabinet auxiliary contact 5 or local cable grounding switch auxiliary contact 8.
Signal generating circuit 23 is connected with the first current transformer 11, the signal generating circuit 23 of the present embodiment is AC constant-current source circuit for generating, it comprises the sine-wave generator 25 of the controlled constant-current source circuit 24 and 23Hz be connected successively, controlled constant-current source circuit 24 is connected with the first current transformer 11, and sine-wave generator 25 is connected with signal processor 20.Signal receiving circuit 26 is connected with the second current transformer 12, the signal receiving circuit 26 of the present embodiment comprises the prime amplifier 27, low-pass filter 28 and the analog to digital converter 29 that are connected successively, prime amplifier 27 is connected with the second current transformer 12, and analog to digital converter 29 is connected with signal processor 20.
Due to cable screen layer, cable cable core and local cable and the collateral road of cable pair can form electric loop, after local cable earthing 7 lock closes a floodgate, offside grounding disconnecting link 15 forms closed-loop path when also lock closes, current signal sensor is to loading special current signal frequently in loop, then judge whether cable pair collateral road grounding switch closes by detecting the current signal collected, determination methods is: signal processor is according to the effective value of the current signal received, frequency and waveform judge deciliter state of cable pair collateral road grounding switch, when the whole separating brake of the grounding switch on offside branch road, the effective value of the current signal received is less than 90% of normal value, frequency values skew is greater than 5Hz, waveform and sinusoidal wave correlativity are less than 50% (need meet simultaneously) at above 3, when the grounding switch on offside branch road has combined floodgate, the effective value of the current signal received is not less than 90% of normal value, frequency values skew is not more than 3Hz, waveform and sinusoidal wave correlativity are not less than 95% (need meet simultaneously) at above 3, can judge electrical connection situation according to the effective value of current signal, frequency and waveform and make corresponding instruction.
Below the course of work of the utility model anti-misoperation locking device is further described:
When local cable grounding switch 7 closes;
By local cable grounding switch auxiliary contact 8, the auxiliary contact testing circuit 19 of the anti-error measurement and control unit of locking 31 detects that local cable grounding switch 7 closes, locking control circuit 17 makes to keep locking to switch of switch cabinet 4 handle hole, and now switch of switch cabinet 4 cannot close;
What signal processor 20 controlled that sine-wave generator 25 and controlled constant-current source circuit 24 produce special (as 23Hz) frequently exchanges constant current signal, by the first current transformer 11, special current signal is frequently loaded on cable shielding layer earthing line 14;
Second current transformer 12 receives the signal on cable shielding layer earthing line 14, signal receiving circuit 26 receives the signal that the second current transformer 12 sends, signal is through prime amplifier 27, low-pass filter 28, digital to analog converter 29 processes rear feeding signal processor 20, signal processor 20 is according to the frequency receiving signal, the effective value of waveform and alternating current judges deciliter state of the offside grounding disconnecting link 15 of current cable 2, and by judgment result displays on display module 18, if detect that the offside grounding disconnecting link 15 of cable 2 closes, then carry out alarm, wait for staff's process, until offside grounding disconnecting link 15 separating brake of cable 2 detected,
When separating local cable grounding switch 7, by local cable auxiliary contact 8, the auxiliary contact testing circuit 19 of the anti-error measurement and control unit of locking 31 detects that local cable grounding switch 7 separately after, and offside grounding disconnecting link 15 is also when gate-dividing state, the locking control circuit 17 of the anti-error measurement and control unit 31 of locking controls the handle hole of electric control lock 3 unlock switch cabinet switch 4, now can Closing Switch cabinet switch 4;
Close a switch cabinet switch 4, by switch of switch cabinet auxiliary contact 5, the auxiliary contact testing circuit 19 of the anti-error measurement and control unit 31 of locking detects that switch of switch cabinet 4 closes, the locking control circuit 17 of the anti-error measurement and control unit 31 of locking controls the handle hole of the local cable grounding switch 7 of electric control lock 6 locking, and now local cable grounding switch 7 can not close;
Switch-dividing cabinet switch 4, by switch of switch cabinet auxiliary contact 5, the auxiliary contact testing circuit 19 of the anti-error measurement and control unit 31 of locking detects that switch of switch cabinet 4 separately, the locking control circuit 17 of the anti-error measurement and control unit of locking 31 controls the handle hole that electric control lock 6 unlocks local cable grounding switch 7, and now local cable grounding switch 7 can close.
Switch cubicle anti-misoperation locking device of the present utility model calculates the setting value of normal value according to the maximum offside branch road distance of setting, with deciliter state of the grounding switch of this setting value automatic decision offside branch road, without the need to manual intervention, and according to correlated judgment result automatic blocking or related electric control lock can be unlocked, realize switch cubicle robotization locking anti-error.And the state of all operations action and disconnecting link can be sent to far-end by the communication interface of the anti-error measurement and control unit of locking.It is anti-error that the utility model can be widely used in the locking of distribution switch cubicle, and particularly cable offside has the situation of grounding disconnecting link.Electronic component in the utility model and integrated circuit can adopt conventional device, and voltage current transformer can adopt existing product in ring main unit, and portable electric flow detection device sensor can adopt current transformer or similar sensor.
Compared with prior art, the utility model has the following advantages:
1, can in deciliter state of switch cubicle local direct-detection switch cubicle cable pair collateral road grounding switch;
2, current transformer adopts harmless mounting means, does not destroy switchgear and cable, keeps the electrical integrity of cable;
3, anti-error measurement and control logic is solidificated in the signal processor of the anti-error measurement and control unit of locking, realizes full-automatic operation, without the need to manual intervention, do not increase workload;
4, the power supply mode of local power supply and storage battery power supply complementation can be adopted, switchgear is all in anti-error guard mode when working or overhaul.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although be described in detail the utility model with reference to above-described embodiment, those of ordinary skill in the field are to be understood that, still can modify to embodiment of the present utility model or equivalent replacement, and not departing from any amendment of the utility model spirit and scope or equivalent replacement, it all should be encompassed among right of the present utility model.
Claims (8)
1. switch cubicle anti-misoperation locking device, is characterized in that, comprising:
Switch of switch cabinet electric control lock, switch of switch cabinet auxiliary contact, local cable grounding switch electric control lock, local cable grounding switch auxiliary contact, current signal sensor and the anti-error measurement and control unit of locking, described switch of switch cabinet electric control lock, switch of switch cabinet auxiliary contact, local cable grounding switch electric control lock, local cable grounding switch auxiliary contact and current signal sensor are connected with the anti-error measurement and control unit of described locking respectively;
Described current signal sensor comprises the first current transformer and the second current transformer, and described first current transformer and the second current transformer are arranged on cable shielding layer earthing line;
The anti-error measurement and control unit of described locking comprises locking control circuit, auxiliary contact testing circuit, signal processor, signal generating circuit, signal receiving circuit and power module, described signal processor respectively with described locking control circuit, auxiliary contact testing circuit, signal generating circuit and signal receiving circuit are connected, described locking control circuit is connected with described switch of switch cabinet electric control lock and local cable grounding switch electric control lock respectively, described auxiliary contact testing circuit is connected with switch of switch cabinet auxiliary contact and local cable grounding switch auxiliary contact respectively, described signal generating circuit is connected with described first current transformer, described signal receiving circuit is connected with the second current transformer.
2. switch cubicle anti-misoperation locking device as claimed in claim 1, is characterized in that: described first current transformer is straight-through current transformer.
3. switch cubicle anti-misoperation locking device as claimed in claim 1 or 2, is characterized in that: described second current transformer is straight-through current transformer.
4. switch cubicle anti-misoperation locking device as claimed in claim 1, is characterized in that: the anti-error measurement and control unit of described locking also comprises the display module, load module and the communication interface that are connected with described signal processor.
5. switch cubicle anti-misoperation locking device as claimed in claim 1, is characterized in that: described signal generating circuit is AC constant-current source circuit for generating.
6. switch cubicle anti-misoperation locking device as claimed in claim 5, it is characterized in that: described signal generating circuit comprises the controlled constant-current source circuit and sine-wave generator that are connected successively, described controlled constant-current source circuit is connected with described first current transformer, and described sine-wave generator is connected with signal processor.
7. switch cubicle anti-misoperation locking device as claimed in claim 6, is characterized in that: described sine-wave generator is 23Hz sine-wave generator.
8. switch cubicle anti-misoperation locking device as claimed in claim 1, it is characterized in that: described signal receiving circuit comprises the prime amplifier, low-pass filter and the analog to digital converter that are connected successively, described prime amplifier is connected with described second current transformer, and described analog to digital converter is connected with signal processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520816276.7U CN205158073U (en) | 2015-10-19 | 2015-10-19 | Cubical switchboard anti -misoperation lockout device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520816276.7U CN205158073U (en) | 2015-10-19 | 2015-10-19 | Cubical switchboard anti -misoperation lockout device |
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| Publication Number | Publication Date |
|---|---|
| CN205158073U true CN205158073U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520816276.7U Expired - Fee Related CN205158073U (en) | 2015-10-19 | 2015-10-19 | Cubical switchboard anti -misoperation lockout device |
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| Country | Link |
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| CN (1) | CN205158073U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950894A (en) * | 2017-05-15 | 2017-07-14 | 江苏三恒科技股份有限公司 | A kind of colliery machine mining face jerk latch switch position identification device and recognition methods |
| CN111123031A (en) * | 2019-12-18 | 2020-05-08 | 国网湖北省电力有限公司宜昌供电公司 | Fault detection method, low-voltage energy storage pre-operation set device, controller and system |
| CN114200192A (en) * | 2021-12-09 | 2022-03-18 | 广东电网有限责任公司 | Induction type charged display device |
-
2015
- 2015-10-19 CN CN201520816276.7U patent/CN205158073U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950894A (en) * | 2017-05-15 | 2017-07-14 | 江苏三恒科技股份有限公司 | A kind of colliery machine mining face jerk latch switch position identification device and recognition methods |
| CN111123031A (en) * | 2019-12-18 | 2020-05-08 | 国网湖北省电力有限公司宜昌供电公司 | Fault detection method, low-voltage energy storage pre-operation set device, controller and system |
| CN114200192A (en) * | 2021-12-09 | 2022-03-18 | 广东电网有限责任公司 | Induction type charged display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20161019 |