CN105356605A - Electrical blocking communication apparatus of high-voltage supply system - Google Patents
Electrical blocking communication apparatus of high-voltage supply system Download PDFInfo
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- CN105356605A CN105356605A CN201510804932.6A CN201510804932A CN105356605A CN 105356605 A CN105356605 A CN 105356605A CN 201510804932 A CN201510804932 A CN 201510804932A CN 105356605 A CN105356605 A CN 105356605A
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Abstract
The invention discloses an electrical blocking communication apparatus of a high-voltage supply system. The apparatus comprises a blocking module, a power supply interface, and a signal line interface, wherein the power supply interface and the signal line interface are connected with the blocking module. The signal line interface consists of a bidirectional transmission channel, a power amplifier, a passive voltage amplifier and a filter unit. The blocking module includes an electric blocking unit or a mechanical blocking unit. According to the invention, on the basis of comprehensive combination of various ways of filtering, isolation, grounding, and shielding and the like, the apparatus has advantages of reduced maintenance workload, high blocking reliability, good anti-error function, and simple and convenient usage and the like. With the apparatus, one part of work of the operating staff can be shared and the apparatus can serve as simulated operation equipment during training; forming of a high-speed heavy-current loop between a power line and a communication line can be effectively prevented; the anti-interference capability of the anti-error blocking device of the microcomputer system can be improved; the safety operation of the system can be guaranteed; and the apparatus plays an important role in guaranteeing safe and reliable operation of the high-voltage system, high quality and economy, and energy conservation and consumption reduction and the like.
Description
Technical field
The present invention relates to high voltage supply system communication device technology field, particularly relate to a kind of high voltage supply system electric blocking communicator.
Background technology
Grid switching operation is as the operating day-to-day work of transformation and distribution system, if there is the situation of misoperation during the course, then not only can cause power outage or make device damage, also can threaten to the life security of operating personnel, thus, in the middle of electrical production, electric operation error is one of wherein very serious accident.Electric operation error comprises charged mistiming and closes earthed switch, mistakenly entering charged chamber and mistake deciliter circuit breaker, on-load deciliter isolating switch, still closes circuit breaker etc. for during make position at earthed switch, and claims " five prevent ".For avoiding high voltage supply system anti-misoperation locking to occur the problems referred to above, inquiring into high voltage supply system shutting device to prevent mistakes in microcomputer and application thereof, ensureing the safety and stability that high voltage supply system is produced.
Anti-misoperation locking device full name is misoperation-proof locking device, is namely to use the program blocking function itself had, and is placed on high voltage electric equipment, thus avoids a kind of mechanical device of related personnel's operating mistake.First shutting device to prevent mistakes in microcomputer needs to obtain the real-time condition information of circuit breaker before analysis, and it carries out communicating reaching this purpose with the watch-dog on backstage mainly through communication equipment; Then by the simulated operation of monitoring operations staff on operation information, and use five prevention logic to carry out analyzing and realizing object, and according to call format, operation order is printed, then the operation information after simulation is passed to machine key.The operating process monitoring operation personnel is responsible for by microcomputer key; and give corresponding prompting; if the interval that operation personnel are strayed into mistake operates; microcomputer key carries out enforceable locking by while giving a warning; to prevent operation personnel from continuing operation, the operating process of correct specification will be demonstrated on its display screen simultaneously; If operation human users is errorless, microcomputer key will open mechanical coding lock and electric puzzle lock, and operation personnel now can proceed operation.
Application number be 201410148179.5 patent provide the generation method of transformer station's anti-error locking system traffic model, based on the IED model of measure and control device, processing generates transformer station anti-error locking system traffic model, and what comprise the steps in one, two, three is one or more: step one: generate circuit breaker lock model and disconnecting link locking model; Step 2: generate net door locking model and ground wire locking model; Step 3: generatorization operation subpoena Controlling model; And step 4: generation data set and report-control block model.The present invention can solve the modeling problem of the mis-locking prevention equipment that IEC61850 standards system does not relate to, the modeling problem of programming operations ticket mode and the data interaction problem between anti-error system and complex automatic system; Achieve the model sharing of anti-error system and automated system, unify local monitoring, the collection system such as control, scheduling and the normal operations of anti-error locking system and the interaction models of programming operations.
The patent that application number is 201010527387.8 provides a kind of microcomputer misoperation prevention locking device, comprises the control device, imitation screen controller, intelligent lock, printing device, the supervising device that are provided with operating system.This control device is PC industrial computer, and this PC industrial computer is provided with connectivity port.This intelligent lock comprises the computer key being provided with Bluetooth data transmission device, the computer key adapter adopting the coding lockset of non-contact IC coded system and can carry out charging to computer key and communicate to connect, and this computer key adapter is connected with the connectivity port of PC industrial computer.The whole operating process simple, intuitive of the present invention, is easy to safeguard.
The patent that application number is 201120300086.1 provides a kind of and possesses the instruction of the position such as electriferous state instruction, switch tool cabinet door, support on the spot and distant place locking, the Intelligent anti-misoperation locking device preventing transformer station's electric misoperation that possesses complete anti-error function in interval, possess Digitized transformation station interface.This utility model is achieved through the following technical solutions: Intelligent anti-misoperation locking device includes controller, communication unit, charged display processing unit, On-off signal processing unit, output switch parameter processing unit and display unit; Controller, as main control unit, completes analyzing and processing and the Logic judgment of each input signal, exports control signal and display information; The information of controller receiving communication unit, according to the action request in the information that communication unit transmits, the electrification in high voltage state that the switching value information transmitted in conjunction with On-off signal processing unit and charged display processing unit transmit carries out the judgement of latching logic, and then the action of control switch amount output processing unit.
But above scheme, while anti mis-closedown function operation, does not consider the emc issue of microsystem in high-voltage relay protection, and the jamproof problem of communicator, therefore has significant limitation in actual applications.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, according to the Electro Magnetic Compatibility of microsystem in high-voltage relay protection, devise a kind of electromagnetism antijam communication device of computer anti-misoperation and lockout, ensure the safety and stability that high voltage supply system is produced.
For achieving the above object, the technical solution used in the present invention is: a kind of high voltage supply system electric blocking communicator, comprise lock modules and difference connected power interface, signal wire interface, described signal wire interface comprises bi-directional transfer path, power amplifier, passive voltage amplifier and filter unit, and described lock modules comprises electric blocking unit or mechanical latching unit.
Described electric blocking unit comprises solenoid mechanism and auxiliary contact, and described auxiliary contact are connected in series with the watch-dog of high voltage supply system.
Described mechanical latching unit comprises the limit switch be connected with outdoor switch blade or high-tension switch cabinet, and described limit switch arranges alarm actuating contact.
Described lock modules arranges earth terminal, is connected Surge Protector between described power interface with described earth terminal.
Decoupling capacitance is connected between described signal wire interface with described earth terminal.
Described power interface comprises double-ended clamp row, and described double-ended clamp row is ferrite magnetic material product.
Described filter unit comprises RC passive low ventilating filter.
Communicator of the present invention, object is to realize on the basis of high voltage supply system computer anti-misoperation and lockout function, overcome the interference effect of microsystem Electro Magnetic Compatibility, avoid the generation of misoperation, the anti-interference of microsystem power line and holding wire and mutually isolated can be made simultaneously.
Concrete structure of the present invention is arranged and beneficial effect is:
First, on blocking function, adopt lock modules, comprise electric blocking unit or mechanical latching unit, can according to different needs, make blocking function play different effects, electric blocking has easy and simple to handle, without the need to the advantage such as auxiliary.For avoiding mistakenly entering charged chamber, electric blocking is the crucial blocking element in locking link, and it unlocks is use the action of solenoid electromagnetic mechanism to realize operation.There are auxiliary contact in the middle of operating mechanism, apply electric blocking just needs to be sealed in auxiliary contact, and auxiliary contact have the sensitive feature that is swift in motion, and better can play blocking function; Mechanical latching does not need application key etc. to help operation when operating, and has the function of the automatic blocking when operate miss, effectively prevent the accident caused because of misoperation.Meanwhile, mechanical latching also has the advantages such as easy and simple to handle, spoilage is low, maintenance amount is few, and can meet forward or reverse locking requirement, makes it receive the welcome of maintainer and operations staff greatly.And in high voltage supply system, there is outdoor switch blade or the switch cubicle mechanical part of multiple non-electric elements class, now can pass through limit switch and connected alarm actuating contact, be preferably applied on electricapparatus base part, overcome the insurmountable problem of electric locking.
Secondly, in microcomputer lock operation, need the impact considering Electro Magnetic Compatibility.The interference source affecting Electro Magnetic Compatibility mainly contains following several types: the electric transition effect that in high-voltage relay protective loop, disconnecting switch operation and circuit breaker cause; The power frequency electric field that high-pressure installation produces and magnetic field; The voltage that short circuit current in grounding system causes raises; The electric transition effect that thunder and lightning causes; The fast transient interference that low-voltage equipment divides closing operation to cause; Static discharge disturbs; The high-frequency conduction that electronic equipment produces and radiation disturbance, by comprehensive analysis, can be summarized as following a few class: static discharge interference, radiation field interference, the interference of attenuated oscillation wave interference, surge impact and Clusters interference.
For this reason, the measure that communicator of the present invention is taked and beneficial effect as follows: due to radiation field interference on integrated circuit type device impact larger, and much because Switching Power Supply can not cause when applying radiation field interference in voltage stabilizing, so, when each electric component of lock modules uses in reality, at the inner surface aluminium coating film of part case, the effect of the ideal radioresistance interference of electromagnetic field can be reached; Simultaneously; high voltage supply system is relating to high-voltage relay protection; high voltage substation bus divides, when closing a floodgate; attenuation oscillasion impulse can be produced; this is that the switching manipulation of a kind of transformer station high voltage bus occurs that the splitting or integrating of isolation switch operates the steep wave transient state caused; belong to damp oscillatory wave; very strong electromagnetic interference effect can be produced to effective transmission of signal; for this reason; decoupling capacitance can be connected between signal wire interface with earth terminal; form bleed-off circuit, the form such as common mode, differential mode can be adopted according to specific needs to suppress this transient disturbance.Disturbing pulse group frequency due to high voltage protective generally comprises 1MHz and 100kHz two kinds, so decoupling capacitance can choose 0.1F or 0.01F.
When antisurge impulsive disturbance, because surge is pulse type, its wave front time is the several seconds, and pulse amplitude, from hundreds of V to several ten thousand V, is the interference that a kind of duration is long, energy is stronger.Therefore the normal work of microsystem electronic equipment can be affected to a great extent; even burn components and parts; so; when device draws earth terminal and earth connection; excess voltage protection or device of surge protector is relied on to suppress surge to disturb; by device of surge protector action, surge current is released to greatly, just can obtain promising result.
Signal wire interface comprises bi-directional transfer path, power amplifier, passive voltage amplifier and filter unit, power amplifier and voltage amplifier form signal processing circuit, can by through bi-directional transfer path input signal, output signal carry out determining frequency amplification, outstanding interference noise characteristic on the one hand, be convenient to filter unit to the stripping of interference source and suppression, on the other hand, the microsystem being convenient to follow-up connection carries out intelligence sample and transmission.Filter unit comprises RC passive low ventilating filter, mainly because its structure is simple, reliability is high, can for active analog devices such as multiple integrated, the computing in microsystem, amplifications, suppress its high open-loop voltage gain and high input impedance, thus by highest signal frequency limitation within certain bandwidth, to reduce sample frequency, facilitate filtered signal to enter in microsystem, be input to digital device through analog-to-digital conversion and process.
The present invention is in conjunction with electromagnetic compatibility test index, form a kind of electromagnetism antijam communication device of computer anti-misoperation and lockout, integrated use filtering, isolation, ground connection, the multiple means such as shielding, have maintenance work few, locking reliability is strong, the advantages such as anti-error function is good and easy to use, it can help operations staff to share part work, again can as the equipment of simulated operation in the middle of training, can also effectively prevent between power line and order wire, forming high speed big current loop, improve the antijamming capability of microsystem anti-misoperation locking device, for the safe operation of entire system provides safeguard, safe and reliable to operation in guarantee high-pressure system, Quality and economy, the aspect such as energy-saving and cost-reducing plays a significant role.
Accompanying drawing explanation
Fig. 1 is each modular structure schematic diagram of the embodiment of the present invention one.
Fig. 2 is each modular structure schematic diagram of the embodiment of the present invention two.
Embodiment
Embodiment one
As shown in Figure 1, a kind of high voltage supply system electric blocking communicator, comprise lock modules and difference connected power interface, signal wire interface 4, signal wire interface comprises bi-directional transfer path 5, power amplifier 6, passive voltage amplifier 7 and filter unit 8, and lock modules comprises electric blocking unit 1.
Electric blocking unit comprises solenoid mechanism 9 and auxiliary contact 10, and auxiliary contact are connected in series with the watch-dog of high voltage supply system.
Lock modules arranges earth terminal 13, is connected Surge Protector 14 between power interface with earth terminal.
Decoupling capacitance 15 is connected between signal wire interface with earth terminal.
Power interface comprises double-ended clamp row 3, and double-ended clamp row is ferrite magnetic material product.
Filter unit comprises RC passive low ventilating filter.
Communicator of the present invention, object is to realize on the basis of high voltage supply system computer anti-misoperation and lockout function, overcome the interference effect of microsystem Electro Magnetic Compatibility, avoid the generation of misoperation, the anti-interference of microsystem power line and holding wire and mutually isolated can be made simultaneously.
First, on blocking function, adopt lock modules, comprise electric blocking unit, electric blocking has easy and simple to handle, without the need to the advantage such as auxiliary.For avoiding mistakenly entering charged chamber, electric blocking is the crucial blocking element in locking link, and it unlocks is use the action of solenoid electromagnetic mechanism to realize operation.There are auxiliary contact in the middle of operating mechanism, apply electric blocking just needs to be sealed in auxiliary contact, and auxiliary contact have the sensitive feature that is swift in motion, and better can play blocking function.
Secondly, in microcomputer lock operation, need the impact considering Electro Magnetic Compatibility.The interference source affecting Electro Magnetic Compatibility mainly contains following several types: the electric transition effect that in high-voltage relay protective loop, disconnecting switch operation and circuit breaker cause; The power frequency electric field that high-pressure installation produces and magnetic field; The voltage that short circuit current in grounding system causes raises; The electric transition effect that thunder and lightning causes; The fast transient interference that low-voltage equipment divides closing operation to cause; Static discharge disturbs; The high-frequency conduction that electronic equipment produces and radiation disturbance, by comprehensive analysis, can be summarized as following a few class: static discharge interference, radiation field interference, the interference of attenuated oscillation wave interference, surge impact and Clusters interference.
For this reason, the measure that communicator of the present invention is taked and beneficial effect as follows: due to radiation field interference on integrated circuit type device impact larger, and much because Switching Power Supply can not cause when applying radiation field interference in voltage stabilizing, so, when each electric component of lock modules uses in reality, at the inner surface aluminium coating film of part case, the effect of the ideal radioresistance interference of electromagnetic field can be reached; Simultaneously; high voltage supply system is relating to high-voltage relay protection; high voltage substation bus divides, when closing a floodgate; attenuation oscillasion impulse can be produced; this is that the switching manipulation of a kind of transformer station high voltage bus occurs that the splitting or integrating of isolation switch operates the steep wave transient state caused; belong to damp oscillatory wave; very strong electromagnetic interference effect can be produced to effective transmission of signal; for this reason; decoupling capacitance can be connected between signal wire interface with earth terminal; form bleed-off circuit, the form such as common mode, differential mode can be adopted according to specific needs to suppress this transient disturbance.Disturbing pulse group frequency due to high voltage protective generally comprises 1MHz and 100kHz two kinds, so decoupling capacitance can choose 0.1F or 0.01F.
When antisurge impulsive disturbance, because surge is pulse type, its wave front time is the several seconds, and pulse amplitude, from hundreds of V to several ten thousand V, is the interference that a kind of duration is long, energy is stronger.Therefore the normal work of microsystem electronic equipment can be affected to a great extent; even burn components and parts; so; when device draws earth terminal and earth connection; excess voltage protection or device of surge protector is relied on to suppress surge to disturb; by device of surge protector action, surge current is released to greatly, just can obtain promising result.
Signal wire interface comprises bi-directional transfer path, power amplifier, passive voltage amplifier and filter unit, power amplifier and voltage amplifier form signal processing circuit, can by through bi-directional transfer path input signal, output signal carry out determining frequency amplification, outstanding interference noise characteristic on the one hand, be convenient to filter unit to the stripping of interference source and suppression, on the other hand, the microsystem being convenient to follow-up connection carries out intelligence sample and transmission.Filter unit comprises RC passive low ventilating filter, mainly because its structure is simple, reliability is high, can for active analog devices such as multiple integrated, the computing in microsystem, amplifications, suppress its high open-loop voltage gain and high input impedance, thus by highest signal frequency limitation within certain bandwidth, to reduce sample frequency, facilitate filtered signal to enter in microsystem, be input to digital device through analog-to-digital conversion and process.
Embodiment two
As shown in Figure 2, a kind of high voltage supply system electric blocking communicator, comprise lock modules and difference connected power interface, signal wire interface 4, signal wire interface comprises bi-directional transfer path 5, power amplifier 6, passive voltage amplifier 7 and filter unit 8, and lock modules comprises mechanical latching unit 2.
Mechanical latching unit comprises the limit switch 11 be connected with outdoor switch blade or high-tension switch cabinet, and limit switch arranges alarm actuating contact 12.
Lock modules arranges earth terminal 13, is connected Surge Protector 14 between power interface with earth terminal.
Decoupling capacitance 15 is connected between signal wire interface with earth terminal.
Power interface comprises double-ended clamp row 3, and double-ended clamp row is ferrite magnetic material product.
Filter unit comprises RC passive low ventilating filter.
Communicator of the present invention, object is to realize on the basis of high voltage supply system computer anti-misoperation and lockout function, overcome the interference effect of microsystem Electro Magnetic Compatibility, avoid the generation of misoperation, the anti-interference of microsystem power line and holding wire and mutually isolated can be made simultaneously.
First, on blocking function, adopt lock modules, comprise mechanical latching unit, mechanical latching does not need application key etc. to help operation when operating, and has the function of the automatic blocking when operate miss, effectively prevent the accident caused because of misoperation.Meanwhile, mechanical latching also has the advantages such as easy and simple to handle, spoilage is low, maintenance amount is few, and can meet forward or reverse locking requirement, makes it receive the welcome of maintainer and operations staff greatly.And in high voltage supply system, there is outdoor switch blade or the switch cubicle mechanical part of multiple non-electric elements class, now can pass through limit switch and connected alarm actuating contact, be preferably applied on electricapparatus base part, overcome the insurmountable problem of electric locking.
Secondly, in microcomputer lock operation, need the impact considering Electro Magnetic Compatibility.The interference source affecting Electro Magnetic Compatibility mainly contains following several types: the electric transition effect that in high-voltage relay protective loop, disconnecting switch operation and circuit breaker cause; The power frequency electric field that high-pressure installation produces and magnetic field; The voltage that short circuit current in grounding system causes raises; The electric transition effect that thunder and lightning causes; The fast transient interference that low-voltage equipment divides closing operation to cause; Static discharge disturbs; The high-frequency conduction that electronic equipment produces and radiation disturbance, by comprehensive analysis, can be summarized as following a few class: static discharge interference, radiation field interference, the interference of attenuated oscillation wave interference, surge impact and Clusters interference.
For this reason, the measure that communicator of the present invention is taked and beneficial effect as follows: due to radiation field interference on integrated circuit type device impact larger, and much because Switching Power Supply can not cause when applying radiation field interference in voltage stabilizing, so, when each electric component of lock modules uses in reality, at the inner surface aluminium coating film of part case, the effect of the ideal radioresistance interference of electromagnetic field can be reached; Simultaneously; high voltage supply system is relating to high-voltage relay protection; high voltage substation bus divides, when closing a floodgate; attenuation oscillasion impulse can be produced; this is that the switching manipulation of a kind of transformer station high voltage bus occurs that the splitting or integrating of isolation switch operates the steep wave transient state caused; belong to damp oscillatory wave; very strong electromagnetic interference effect can be produced to effective transmission of signal; for this reason; decoupling capacitance can be connected between signal wire interface with earth terminal; form bleed-off circuit, the form such as common mode, differential mode can be adopted according to specific needs to suppress this transient disturbance.Disturbing pulse group frequency due to high voltage protective generally comprises 1MHz and 100kHz two kinds, so decoupling capacitance can choose 0.1F or 0.01F.
When antisurge impulsive disturbance, because surge is pulse type, its wave front time is the several seconds, and pulse amplitude, from hundreds of V to several ten thousand V, is the interference that a kind of duration is long, energy is stronger.Therefore the normal work of microsystem electronic equipment can be affected to a great extent; even burn components and parts; so; when device draws earth terminal and earth connection; excess voltage protection or device of surge protector is relied on to suppress surge to disturb; by device of surge protector action, surge current is released to greatly, just can obtain promising result.
Signal wire interface comprises bi-directional transfer path, power amplifier, passive voltage amplifier and filter unit, power amplifier and voltage amplifier form signal processing circuit, can by through bi-directional transfer path input signal, output signal carry out determining frequency amplification, outstanding interference noise characteristic on the one hand, be convenient to filter unit to the stripping of interference source and suppression, on the other hand, the microsystem being convenient to follow-up connection carries out intelligence sample and transmission.Filter unit comprises RC passive low ventilating filter, mainly because its structure is simple, reliability is high, can for active analog devices such as multiple integrated, the computing in microsystem, amplifications, suppress its high open-loop voltage gain and high input impedance, thus by highest signal frequency limitation within certain bandwidth, to reduce sample frequency, facilitate filtered signal to enter in microsystem, be input to digital device through analog-to-digital conversion and process.
Claims (7)
1. a high voltage supply system electric blocking communicator, it is characterized in that: comprise lock modules and difference connected power interface, signal wire interface, described signal wire interface comprises bi-directional transfer path, power amplifier, passive voltage amplifier and filter unit, and described lock modules comprises electric blocking unit or mechanical latching unit.
2. high voltage supply system electric blocking communicator as claimed in claim 1, is characterized in that: described electric blocking unit comprises solenoid mechanism and auxiliary contact, and described auxiliary contact are connected in series with the watch-dog of high voltage supply system.
3. high voltage supply system electric blocking communicator as claimed in claim 1, is characterized in that: described mechanical latching unit comprises the limit switch be connected with outdoor switch blade or high-tension switch cabinet, and described limit switch arranges alarm actuating contact.
4. high voltage supply system electric blocking communicator as claimed in claim 2 or claim 3, is characterized in that: described lock modules arranges earth terminal, is connected Surge Protector between described power interface with described earth terminal.
5. high voltage supply system electric blocking communicator as claimed in claim 4, is characterized in that: be connected decoupling capacitance between described signal wire interface with described earth terminal.
6. high voltage supply system electric blocking communicator as claimed in claim 1, is characterized in that: described power interface comprises double-ended clamp row, and described double-ended clamp row is ferrite magnetic material product.
7. high voltage supply system electric blocking communicator as claimed in claim 1, is characterized in that: described filter unit comprises RC passive low ventilating filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510804932.6A CN105356605A (en) | 2015-11-21 | 2015-11-21 | Electrical blocking communication apparatus of high-voltage supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510804932.6A CN105356605A (en) | 2015-11-21 | 2015-11-21 | Electrical blocking communication apparatus of high-voltage supply system |
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| CN105356605A true CN105356605A (en) | 2016-02-24 |
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| CN201510804932.6A Pending CN105356605A (en) | 2015-11-21 | 2015-11-21 | Electrical blocking communication apparatus of high-voltage supply system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125333A (en) * | 2000-10-13 | 2002-04-26 | Fuji Electric Co Ltd | Slave apparatus for power supply control and power supply control system in control panel |
| CN1834392A (en) * | 2005-11-07 | 2006-09-20 | 珠海市共创有限公司 | Unit controller of electromagnetic lock |
| CN104300515A (en) * | 2014-10-30 | 2015-01-21 | 国网河南省电力公司平顶山供电公司 | Live part verification information recognition and intelligent protection device for transformer substation |
-
2015
- 2015-11-21 CN CN201510804932.6A patent/CN105356605A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125333A (en) * | 2000-10-13 | 2002-04-26 | Fuji Electric Co Ltd | Slave apparatus for power supply control and power supply control system in control panel |
| CN1834392A (en) * | 2005-11-07 | 2006-09-20 | 珠海市共创有限公司 | Unit controller of electromagnetic lock |
| CN104300515A (en) * | 2014-10-30 | 2015-01-21 | 国网河南省电力公司平顶山供电公司 | Live part verification information recognition and intelligent protection device for transformer substation |
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Inventor after: Sun Ruihua Inventor after: Wang Jin Inventor after: Sun Jiaying Inventor after: Hu Juntai Inventor after: Liu Zhen Inventor after: Cao Jianjun Inventor after: Fu Xiao Inventor after: Guo Yipeng Inventor after: Zhi Yongjun Inventor after: Zheng Xiaofang Inventor after: Wang Xinxin Inventor before: Sun Ruihua |
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Application publication date: 20160224 |
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