CN201699481U - Intelligent controller of 10-20kV section switch - Google Patents
Intelligent controller of 10-20kV section switch Download PDFInfo
- Publication number
- CN201699481U CN201699481U CN2010202322350U CN201020232235U CN201699481U CN 201699481 U CN201699481 U CN 201699481U CN 2010202322350 U CN2010202322350 U CN 2010202322350U CN 201020232235 U CN201020232235 U CN 201020232235U CN 201699481 U CN201699481 U CN 201699481U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The utility model provides an intelligent controller of a 10-20kV section switch, which comprises a signal data acquiring circuit, a signal data computing and judging circuit, a switch operating circuit and an optical terminal machine circuit, wherein a high-voltage section switch power source system acquires the signal data and is connected with the signal data computing and judging circuit and the optical terminal machine circuit in an outputting way; the signal data computing and judging circuit is connected with the switch operating circuit and the optical terminal machine circuit in an outputting way; the switch operating circuit is connected with the optical terminal machine circuit; the optical terminal machine circuit is connected with an optical fiber communication cable circuit; and the optical fiber communication cable circuit is connected with a network matching intelligent control center. The intelligent controller has the functions of protection and automatic operation, can momentarily see the running current and the temperature of the cable by means of telemetering and remote signaling according to the setting, can momentarily perform the remote switching operation according to the field running requirement of the switch, shortens the time for operating the switch, and can actively promote the development of the intelligent control of the power distribution.
Description
Technical field
The present invention relates to a kind of 10～20kV block switch intelligent control technology, specifically, is a kind of distribution high-pressure subsection switch intelligence controlling device that is applied to.
Background technology
The intelligent grid construction is carried out in electric power system at present comprehensively, and full electric network is carried out Based Intelligent Control, intelligent management, intellectual analysis.The intelligent construction of distribution only just begun starting, because a variety of causes fails to be generalizable always comprehensively, for distribution supply intelligent Research on Control, it also is the intelligentized construction popularization and application of a distribution part, be primarily aimed at distribution transformer and on-load switch and carry out Based Intelligent Control, intelligent management.
Distribution high-pressure subsection switch intelligent control technology research and construction will play very big promotion to the power distribution system equipment safe operation, in the power distribution system equipment of operation, owing to can not monitor in real time, be out of order basically at present, be overhauled by user notification; Power supply quality is low, and device damage rate height if can be popularized in an all-round way and use distribution high-pressure subsection switch intelligent control technology, can play crucial effects to the development of distribution system intelligent control technology.
Summary of the invention
The objective of the invention is to realize by following technical scheme:
High-pressure subsection switch intelligence controlling device comprises the signal data acquisition circuit, and signal data calculates decision circuitry, switching manipulation circuit, optical transceiver circuit;
Wherein, described signal data acquisition circuit collects signal data output from the high-pressure subsection switch power supply system and connects described signal data calculating decision circuitry, optical transceiver circuit; Signal data calculates decision circuitry output and connects described switching manipulation circuit, optical transceiver circuit; Described switching manipulation circuit connects the optical transceiver circuit, and the optical transceiver circuit connects the optical fibre communication cable circuit, and the optical fibre communication cable circuit connects the distribution intelligent control center.
The signal data acquisition circuit comprises high-pressure subsection switch branch, closing position signal acquisition circuit, cable temperature signal acquisition circuit, current signal Acquisition Circuit, phase line ground signalling Acquisition Circuit; Described cable temperature signal acquisition circuit, current signal Acquisition Circuit output termination connect signal data and calculate decision circuitry, optical transceiver circuit; Phase line ground signalling Acquisition Circuit output termination connects described optical transceiver circuit;
Wherein, described high-pressure subsection switch branch, closing position signal acquisition circuit are to gather branch, closing position signal from described switching manipulation structure auxiliary contact, are connected in the optical transceiver circuit;
Described cable temperature signal acquisition circuit is that the detector unit digital temperature sensor is connected in a certain position of described cable end, gathers the cable temperature data-signal from detector unit, is connected in signal data and calculates decision circuitry, optical transceiver circuit;
Described current signal Acquisition Circuit is that L1, L2, L3 three phase mains electric current are exported the current signal that is fit to requirement after current transformer and load resistance conversion, inserts signal data and calculates decision circuitry, optical transceiver circuit.
Described phase line ground signalling Acquisition Circuit is the current signal that output is fit to requirement after zero sequence current mutual inductor and load resistance conversion, inserts the optical transceiver circuit.
Signal data calculates decision circuitry and comprises the A/D translation circuit, calculates decision circuitry, executive component; Described A/D translation circuit input is exported a termination with described signal data acquisition circuit and is connected, and the output of A/D translation circuit connects described data computation decision circuitry, and the output of data computation decision circuitry connects described executive component; Described executive component output has two terminations, a termination to connect described switching manipulation circuit, and another termination connects described optical transceiver circuit.
The switching manipulation circuit comprises the contacting controling circuit of high-pressure subsection switch motor drive mechanism, the sub-gate control circuit of high-pressure subsection switch motor drive mechanism; The switching manipulation circuit input signal calculates decision circuitry, optical transceiver receiving circuit from signal data respectively;
Wherein, described high-pressure subsection switch contacting controling circuit is meant the high-pressure subsection switch motor drive mechanism closing circuit of described operation;
Described high-pressure subsection switch sub-gate control circuit is meant the high voltage load block switch motor drive mechanism sub-gate circuit of described operation;
The optical transceiver circuit comprises fiber optic cables, optical receiving circuit, optical transmission circuit; Described optical receiving circuit one end connects fiber optic cables, is to receive the signal that transmits from supply intelligent control centre, changes light signal into the signal of telecommunication and sends the block switch intelligence controlling device to; The other end connects optical transmission circuit, changes the signal of telecommunication of block switch intelligence controlling device into light signal and is transmitted to supply intelligent control centre by fiber optic cables.
This high-pressure subsection switch intelligence controlling device utilizes advanced computer technology, monitoring technology, and control technology, the communication technology, thus develop a kind of high-pressure subsection switch Long-distance Control, real-time status Data Detection, Intellectualized monitoring device that is used for distribution system.The relative prior art of the present invention has outstanding substantive distinguishing features and obvious improvement, specifically, this high-pressure subsection switch intelligence controlling device technological progress, reasonable in design, desirable realization high-pressure subsection switch electricity Based Intelligent Control, intelligent management is for development network distribution system automation control, will play positive facilitation, the concrete advantage of this high-pressure subsection switch intelligence controlling device:
1, this high-pressure subsection switch intelligence controlling device monitoring power supply power supply safety ruuning situation at any time has protection and automatic operating function, can cut faulty line automatically according to setting, and improves power supply reliability and fail safe.
2, this high-pressure subsection switch intelligence controlling device is monitored power supply ruuning situation at any time, can see source current at any time, reach the service cable temperature by remote measurement, remote signalling.
3, this high-pressure subsection switch intelligence controlling device has the remote operation switch, according to switch on-the-spot running status needs switching at any time, can carry out remote operation, and operating personnel shorten the console switch time less than the switch scene, reduces not go loss.
Description of drawings
Fig. 1 is 10～20kV block switch intelligence controlling device composition frame chart of the present invention;
Fig. 2 is a signal data acquisition circuit block diagram of the present invention;
Fig. 3 is that signal data of the present invention calculates the decision circuitry block diagram;
Fig. 4 is a switching manipulation circuit block diagram of the present invention;
Fig. 5 is that optical transceiver circuit of the present invention is formed block diagram
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, form block diagram for 10～20kV block switch intelligence controlling device of the present invention, this device comprises signal data acquisition circuit 1, and signal data calculates decision circuitry 2, switching manipulation circuit 3, optical transceiver circuit 4;
Described signal data acquisition circuit collects signal data output from the high-pressure subsection switch power supply system and connects described signal data calculating decision circuitry, optical transceiver circuit; Signal data calculates decision circuitry output and connects described high-pressure subsection switching manipulation circuit, described optical transceiver circuit; The optical transceiver circuit is connected with described high-pressure subsection switching manipulation circuit, and the optical transceiver circuit connects the optical fibre communication cable circuit, and the optical fibre communication cable circuit connects the distribution intelligent control center.
Described high-pressure subsection switch intelligence controlling device; the signal data acquisition circuit collects the output of real-time status data-signal from high-pressure subsection switch electric power system; be transferred to data computation decision circuitry, optical transceiver circuit respectively; various signal datas compare judgement by data computation judgment processing circuit; if device fails starts the protection action; signal is transferred to high-pressure subsection switching manipulation circuit and carries out this switch trip; with signal light transmission terminal circuit radiating circuit, the high-pressure subsection on off state is changed the back situation inform the electrician simultaneously.
When the high-pressure subsection switch need change state, but an electrician distant place operate by optical fibre communication cable circuit, high-pressure subsection switching manipulation circuit, need not arrive high-pressure subsection switch scene.
When the electrician need know on-the-spot high-pressure subsection switch ruuning situation, as electric current, cable temperature, can be directly by the optical fibre communication cable circuit do not have, signal data acquisition circuit, a distant place access the field apparatus operational factor and check.
Fig. 2 is a data-signal Acquisition Circuit block diagram of the present invention, the signal data acquisition circuit comprises described high-pressure subsection switch branch, closing position signal acquisition circuit 2A, cable temperature signal acquisition circuit 2B, current signal Acquisition Circuit 2C, phase line ground signalling Acquisition Circuit 2E.
The data-signal Acquisition Circuit is exported termination connection signal data calculating decision circuitry, another termination connects described optical transceiver circuit;
Described high-pressure subsection switch branch, closing position signal acquisition circuit are to gather branch, closing position signal from described switching manipulation structure auxiliary contact, are connected in the optical transceiver circuit;
Described cable temperature signal acquisition circuit is that the detector unit digital temperature sensor is connected in a certain position of described cable end, gathers the cable temperature data from detector unit, is connected in signal data and calculates decision circuitry; When the collecting temperature data relatively exceed setting by calculating, send alarm signal.When the electrician normally makes an inspection tour, but the cable temperature value is checked in a distant place.
Described current signal Acquisition Circuit is that L1, L2, L3 three phase mains electric current are exported the current signal that is fit to requirement through current transformer and load resistance, and output inserts signal data calculating decision circuitry; When electric power system generation problem, calculate the super setting of current parameters by microcomputer, send the overcurrent alarm signal, or tripping operation.
Described phase line ground signalling Acquisition Circuit is the current signal that output is fit to requirement after zero sequence current mutual inductor and load resistance conversion, inserts the optical transceiver circuit.The preface current transformer detects the phase line ground signalling, sends alarm signal by the optical transceiver circuit, and the electrician can make an inspection tour fast and search particular location.
Fig. 3 is that signal data of the present invention calculates the decision circuitry block diagram, and signal data calculates decision circuitry and comprises: A/D translation circuit 31, calculating decision circuitry 32, executive component 33; Described executive component output has two terminations, a termination to connect described switching manipulation circuit, and another termination connects described optical transceiver circuit.
Described A/D translation circuit 31 inputs connect described signal data acquisition circuit and export a termination, the output of A/D translation circuit connects described calculating decision circuitry 32, calculate decision circuitry output and connect described executive component 33, executive component is exported a termination and is connected described switching manipulation circuit, and another termination connects described optical transceiver circuit.
After described data computation decision circuitry obtained various signal datas from signal acquisition circuit, signal data carried out A/D conversion input and calculates decision circuitry, calculates comparison, and comparative result is exported to executive component, carries out fling-cut switch or warning.
Fig. 4 is a switching manipulation circuit composition frame chart of the present invention, and the switching manipulation circuit comprises the contacting controling circuit 41 of high voltage load block switch motor drive mechanism, the sub-gate control circuit 42 of high-pressure subsection switch motor drive mechanism.
Switching operation signal calculates decision circuitry, optical transceiver circuit receiving circuit output termination from signal data respectively;
Described high-pressure subsection switch branch, contacting controling circuit are meant high-pressure subsection switch motor drive mechanism branch, the closing circuit of described operation; After the high-pressure subsection switch obtained branch, switching signal, the high-pressure subsection switch divided automatically, closing operation, reported to the police after the high-pressure subsection on off state changes and informed.
Fig. 5 is that optical transceiver circuit of the present invention is formed block diagram, and the optical transceiver circuit comprises optical receiving circuit 51, optical transmission circuit 52, fiber optic cables 53; Described optical receiving circuit one end connects fiber optic cables, is to receive the signal that transmits from supply intelligent control centre, changes light signal into signal of telecommunication output and sends high-pressure subsection switch intelligence controlling device to; The other end connects optical transmission circuit, changes the high-pressure subsection switch intelligence controlling device signal of telecommunication into light signal, is transmitted to supply intelligent control centre by fiber optic cables.
When high-pressure subsection switch intelligence controlling device outwards transmitted, the optical transceiver radiating circuit was carried out in accordance with regulations coding, changed the signal of telecommunication into light signal and outwards launched by fiber optic cables.Change signal of telecommunication output into and send high-pressure subsection switch intelligence controlling device to when the optical transceiver receiving circuit receives certain light signal.
When personnel on duty need carry out a distant place when in time operating to the high-pressure subsection switch, can transmit operation signal by the fiber optic cables circuit at the distribution intelligent control center and operate, can shorten a lot of times, and improve security reliability.When personnel on duty need check system equipment, can pursue platform by the fiber optic cables circuit at the distribution intelligent control center and check various ruuning situations.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (5)
1. 10～20kV block switch intelligence controlling device is characterized in that: comprise the signal data acquisition circuit, signal data calculating decision circuitry, switching manipulation circuit, optical transceiver circuit;
Wherein, described signal data acquisition circuit collects signal data output from the high-pressure subsection switch power supply system and connects described signal data calculating decision circuitry, optical transceiver circuit; Signal data calculates decision circuitry output and connects described switching manipulation circuit, optical transceiver circuit; Described switching manipulation circuit connects the optical transceiver circuit, and the optical transceiver circuit connects the optical fibre communication cable circuit, and the optical fibre communication cable circuit connects the distribution intelligent control center.
2. 10～20kV block switch intelligence controlling device according to claim 1, it is characterized in that: the signal data acquisition circuit comprises high-pressure subsection switch branch, closing position signal acquisition circuit, the cable temperature signal acquisition circuit, current signal Acquisition Circuit, phase line ground signalling Acquisition Circuit; Described cable temperature signal acquisition circuit, current signal Acquisition Circuit output termination connect signal data and calculate decision circuitry, optical transceiver circuit; Phase line ground signalling Acquisition Circuit output termination connects described optical transceiver circuit;
Wherein, described high-pressure subsection switch branch, closing position signal acquisition circuit are to gather branch, closing position signal from described switching manipulation structure auxiliary contact, are connected in the optical transceiver circuit;
Described cable temperature signal acquisition circuit is that the detector unit digital temperature sensor is connected in a certain position of described cable end, gathers the cable temperature data-signal from detector unit, is connected in signal data and calculates decision circuitry, optical transceiver circuit;
Described current signal Acquisition Circuit is that L1, L2, L3 three phase mains electric current are exported the current signal that is fit to requirement after current transformer and load resistance conversion, inserts signal data and calculates decision circuitry, optical transceiver circuit,
Described phase line ground signalling Acquisition Circuit is the current signal that output is fit to requirement after zero sequence current mutual inductor and load resistance conversion, inserts the optical transceiver circuit.
3. 10～20kV block switch intelligence controlling device according to claim 1 is characterized in that: signal data calculates decision circuitry and comprises the A/D translation circuit, calculates decision circuitry, executive component; Described A/D translation circuit input is exported a termination with described signal data acquisition circuit and is connected, and the output of A/D translation circuit connects described data computation decision circuitry, and the output of data computation decision circuitry connects described executive component; Described executive component output has two terminations, a termination to connect described switching manipulation circuit, and another termination connects described optical transceiver circuit.
4. 10～20kV block switch intelligence controlling device according to claim 1, it is characterized in that: the switching manipulation circuit comprises the contacting controling circuit of high-pressure subsection switch motor drive mechanism, the sub-gate control circuit of high-pressure subsection switch motor drive mechanism; The switching manipulation circuit input signal calculates decision circuitry, optical transceiver receiving circuit from signal data respectively;
Wherein, described high-pressure subsection switch contacting controling circuit is meant the high-pressure subsection switch motor drive mechanism closing circuit of described operation;
Described high-pressure subsection switch sub-gate control circuit is meant the high-pressure subsection switch motor drive mechanism sub-gate circuit of described operation.
5. 10～20kV block switch intelligence controlling device according to claim 1, it is characterized in that: the optical transceiver circuit comprises fiber optic cables, optical receiving circuit, optical transmission circuit; Described optical receiving circuit one end connects fiber optic cables, is to receive the signal that transmits from supply intelligent control centre, changes light signal into the signal of telecommunication and sends the block switch intelligence controlling device to; The other end connects optical transmission circuit, changes the signal of telecommunication of block switch intelligence controlling device into light signal and is transmitted to supply intelligent control centre by fiber optic cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202322350U CN201699481U (en) | 2010-06-12 | 2010-06-12 | Intelligent controller of 10-20kV section switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202322350U CN201699481U (en) | 2010-06-12 | 2010-06-12 | Intelligent controller of 10-20kV section switch |
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| CN201699481U true CN201699481U (en) | 2011-01-05 |
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| CN2010202322350U Expired - Fee Related CN201699481U (en) | 2010-06-12 | 2010-06-12 | Intelligent controller of 10-20kV section switch |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195347A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of high-voltage cable tapping box |
| CN102195351A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating device of two-winding main transformer of 110kV transformer substation |
| CN102195349A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of transformer substation outlet switch |
| CN102195357A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of three-winding main transformer of 220kV transformer substation |
| CN102195359A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | 10-20kV load section switch remote operating control device |
| CN102195348A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Device for remotely operating and controlling bus tie switch of transformer substation |
| CN102195353A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operation control device of transformer substation arc-extinction coil |
| CN102195350A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating device of low-voltage circuit breaker of 10-20kV box type transformer |
| CN102195355A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of 6-20kV transformer |
| CN102195358A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operation controller for feeder circuit breaker of 10kV cable branch box |
| CN102222978A (en) * | 2011-05-13 | 2011-10-19 | 河南省电力公司驻马店供电公司 | Remote operation control device for centralized control center of transformer station |
| CN102280932A (en) * | 2010-06-12 | 2011-12-14 | 陈家斌 | Intelligent control device of high-voltage section switch |
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2010
- 2010-06-12 CN CN2010202322350U patent/CN201699481U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280932A (en) * | 2010-06-12 | 2011-12-14 | 陈家斌 | Intelligent control device of high-voltage section switch |
| CN102195347A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of high-voltage cable tapping box |
| CN102195349A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of transformer substation outlet switch |
| CN102195348A (en) * | 2011-05-13 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Device for remotely operating and controlling bus tie switch of transformer substation |
| CN102222978A (en) * | 2011-05-13 | 2011-10-19 | 河南省电力公司驻马店供电公司 | Remote operation control device for centralized control center of transformer station |
| CN102195351A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating device of two-winding main transformer of 110kV transformer substation |
| CN102195357A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of three-winding main transformer of 220kV transformer substation |
| CN102195359A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | 10-20kV load section switch remote operating control device |
| CN102195353A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operation control device of transformer substation arc-extinction coil |
| CN102195350A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating device of low-voltage circuit breaker of 10-20kV box type transformer |
| CN102195355A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operating control device of 6-20kV transformer |
| CN102195358A (en) * | 2011-05-16 | 2011-09-21 | 河南省电力公司驻马店供电公司 | Remote operation controller for feeder circuit breaker of 10kV cable branch box |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20110612 |