CN202663097U - Improved structure of safety protection device of low-voltage distribution box - Google Patents

Improved structure of safety protection device of low-voltage distribution box Download PDF

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Publication number
CN202663097U
CN202663097U CN2012202582978U CN201220258297U CN202663097U CN 202663097 U CN202663097 U CN 202663097U CN 2012202582978 U CN2012202582978 U CN 2012202582978U CN 201220258297 U CN201220258297 U CN 201220258297U CN 202663097 U CN202663097 U CN 202663097U
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CN
China
Prior art keywords
low
voltage distribution
distribution cabinet
voltage
collector terminal
Prior art date
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Expired - Fee Related
Application number
CN2012202582978U
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Chinese (zh)
Inventor
陈志武
吴宇红
陈伟明
宋云轩
方百荣
章建森
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DEQING POWER SUPPLY BUREAU
State Grid Corp of China SGCC
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DEQING POWER SUPPLY BUREAU
State Grid Corp of China SGCC
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Priority to CN2012202582978U priority Critical patent/CN202663097U/en
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Publication of CN202663097U publication Critical patent/CN202663097U/en
Anticipated expiration legal-status Critical
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems 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
    • Y04S40/12Systems 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
    • Y04S40/126Systems 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 wireless data transmission

Abstract

The utility model discloses an improved structure of a safety protection device of a low-voltage distribution box. A current transformer, a zero-sequence current transformer and an intelligent residual current action protector are arranged at a fuse upper end of a low-voltage outlet wire. The intelligent residual current action protector collects three-phase current values monitored by the current transformer and zero-sequence current values monitored by the zero-sequence current transformer. A contact type temperature sensor is arranged on the surface of a conductor arranged at the regenerative thermal oxidizer (RTO) fuse lower end of the low-voltage outlet wire. A water-level sensor is arranged at the position higher than the installation surface set position. The contact type temperature sensor, the water-level sensor and a temperature and water level transmitter are in communication connection, the temperature and water level transmitter and a wireless low-voltage distribution box data collection terminal are in communication connection, and the wireless low-voltage distribution box data collection terminal and the intelligent residual current action protector are in communication connection. The improved structure removes inconvenience in cable temperature measuring in daily inspection by using an infrared thermometer.

Description

A kind of low-voltage distribution cabinet safety device improves structure
Technical field
The utility model relates to the low-voltage distribution cabinet safety device and improves structure.
Background technology
At present power supply enterprise does not all consider monitoring temperature and the fault automatic disconnection quarantine measures of cable and RTO fuse junction, and per month during equipment-patrolling, and safety must not stipulate again and used hand directly to contact cable, so can't check the cable surface temperature.If, a certain group of low tension cable root line is because connecting loosening or the overload heating causes and burns, cause short circuit, to affect then that this group cable is scrapped or whole low-voltage distribution cabinet in equipment burnout, affect that the power failure area is little to be that then the user has a power failure under this group low-pressure line-outgoing, large then be that several groups of low-pressure line-outgoings connection users in the whole low-voltage distribution cabinet all have a power failure.In addition, when meeting extra torrential rain, be in the frequent ponding of low-lying power distribution room, the casual equipment that burns to low-pressure line-outgoing RTO fuse place in the complete whole low-voltage distribution cabinet of water also occured.
The utility model content
Technical problem to be solved in the utility model just provides a kind of low-voltage distribution cabinet safety device and improves structure, can realize low-pressure line-outgoing cable and RTO fuse junction monitoring temperature and fault point automatic disconnection isolation and the next water level early warning and upper water level automatic disconnection low-voltage distribution cabinet bottom power supply.
For solving the problems of the technologies described above; the utility model adopts following technical scheme: a kind of low-voltage distribution cabinet safety device improves structure; comprise low-voltage bus bar; described low-voltage bus bar connects at least one group of low-voltage power supply unit; described low-voltage power supply unit comprises A.C. contactor; fuse; A.C. contactor and fuse are installed on the low-pressure line-outgoing of being drawn by low-voltage bus bar in turn; described low-pressure line-outgoing terminal connects low-voltage customer; it is characterized in that: described low-pressure line-outgoing is equipped with current transformer at the upper end of fuse; zero sequence current mutual inductor and intelligent residual current action protector; the intelligent residual current action protector gathers the three-phase electricity flow valuve of current transformer monitoring and the zero-sequence current value of zero sequence current mutual inductor monitoring; described low-pressure line-outgoing is being installed contact type temperature sensor with the conductive surface of the next end of RTO fuse; described low-voltage distribution cabinet is being higher than installed surface setting position installation level sensor; described contact type temperature sensor and level sensor and water level of temperature transmitter establish a communications link; described water level of temperature transmitter and wireless low-voltage distribution cabinet data collector terminal establish a communications link; wireless low-voltage distribution cabinet data collector terminal and intelligent residual current action protector establish a communications link, and the voltage signal of contact type temperature sensor and the switching signal of level sensor reach wireless low-voltage distribution cabinet data collector terminal and analyse and compare and store and control simultaneously the action of intelligent residual current action protector after water level of temperature transmitter digital quantity conversion.
Preferably, described contact type temperature sensor uses the high temperature resistant nylon band to be fixed on the low-pressure line-outgoing, and the while contact type temperature sensor installs the high-temperature-resisting silicon rubber sheath outward additional to be protected.
Preferably, setting up wireless telecommunications between described wireless low-voltage distribution cabinet data collector terminal and the county telephone central office server is connected, described county telephone central office server and SQL2005 database, data analysis module, real-time monitoring system module, remote control module couple together, the receive data by wireless terminal with data upload to county telephone central office's Servers-SQL 2005 databases, then data analysis module, real-time monitoring system module and remote control module receive this data, and described real-time monitoring system module and equipment manager mobile phone establish a communications link.
Preferably; described low-voltage distribution cabinet is at the next level sensor of liftoff 100mm place fixed installation; at the upper level sensor of liftoff 200mm place fixed installation; when the next water level sensor switch signal intensity; after signal is received in wireless low-voltage distribution cabinet data collector terminal; transfer to immediately county telephone central office's server; by the early warning of real-time monitoring system module and send note to equipment manager; when upper water level sensor switch signal intensity; wireless low-voltage distribution cabinet data collector terminal is received and is sent immediately event whole intelligent residual current action protector to the low-voltage distribution cabinet behind the signal; the outage of intelligent residual current action protector control ac contactor coil; simultaneously wireless low-voltage distribution cabinet data collector terminal is sent to county telephone central office's server with this event, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
Preferably, a higher limit and a limiting value are set to the temperature data that transmits in described wireless low-voltage distribution cabinet data collector terminal, described limiting value temperature is higher than the higher limit temperature, when temperature data is higher than higher limit, send event to the early warning of real-time monitoring system module by wireless low-voltage distribution cabinet data collector terminal, the real-time monitoring system module sends note to the equipment manager mobile phone; When temperature data is higher than limiting value; wireless low-voltage distribution cabinet data collector terminal will send event immediately to the intelligent residual current action protector of corresponding current supply circuit; the outage of intelligent residual current action protector control ac contactor coil; simultaneously wireless low-voltage distribution cabinet data collector terminal is sent to county telephone central office's server with this event, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
The utility model has the advantages that: electric power enterprise is only limited in one's power information machine room of power transformation at monitoring temperature at present, therefore, the utility model has namely solved the inconvenience that brings when infrared radiation thermometer is used in daily tour to the cable thermometric, and when causing surface temperature because overload or junction are loosening, cable raises when reaching ultralimit, rapidly automatic separating fault low tension loop is avoided being forced to move back fortune with other low-voltage power supply loop in the cabinet.And the water level monitoring principle is simple, but its effect overflows, and cost is light again, burns out the generation of a whole set of low-voltage distribution apparatus accident because water overflows low-pressure line-outgoing RTO fuse when also having solved extra torrential rain simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further described:
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model elementary diagram.
Embodiment
Specify the embodiment that improves structure into a kind of low-voltage distribution cabinet safety device of the utility model in conjunction with Fig. 1 and Fig. 2, comprise low-voltage bus bar 1; fuse 2; low-voltage customer 3; current transformer 11; zero sequence current mutual inductor 12; 1#-4# contact type temperature sensor 13; upper level sensor 14; the next level sensor 15; A.C. contactor 21; intelligent residual current action protector 22; water level of temperature transmitter 23; wireless low-voltage distribution cabinet data collector terminal 24; county telephone central office's server 31; SQL2005 database 32; data analysis module 33; real-time monitoring system module 34; remote control module 35.
Wherein, low-voltage bus bar, A.C. contactor, fuse, low-voltage customer are connected to form the low-voltage power supply unit; Current transformer, zero sequence current mutual inductor, 1#-4# contact type temperature sensor, upper level sensor, the next level sensor form data acquisition unit; A.C. contactor, intelligent residual current action protector, water level of temperature transmitter, wireless low-voltage distribution cabinet data collector terminal form Data Collection and transmission control unit; County telephone central office's server, SQL2005 database, data analysis module, real-time monitoring system module, remote control module form applied systems unit.
The low-voltage power supply unit is to adopt phase three-wire three (A, B, C) to link to each other by low-voltage bus bar, AC contactor touch head system, fuse, low-voltage customer, and zero line (N) is incoming transport contact system of contactor and fuse not, adopts the mode that directly links to each other.
Data acquisition unit is that current transformer, zero sequence current mutual inductor, intelligent residual current action protector are linked to each other, and gathers three-phase current and zero-sequence current value by the intelligent residual current action protector; 1#-4# contact type temperature sensor, upper level sensor, the next water sensor, water level of temperature transmitter link to each other, and gather contact type temperature sensor voltage signal and upper (descend) position water level sensor switch amount data and reach wireless low-voltage distribution cabinet data collector terminal by the RS485 communication interface analyse and compare and store after the water level of temperature transmitter is changed.
Data Collection is to link to each other with ac contactor coil by the intelligent residual current action protector with transmission control unit; Intelligent residual current action protector, water level of temperature transmitter, wireless low-voltage distribution cabinet data collector terminal adopt the RS485 communication interface to link to each other by different stipulations; in terminal, finish analysis and compare by the data of erection unit real-time collecting; then give outgoing event; again event is returned to the intelligent residual current action protector through wireless low-voltage distribution cabinet data collector terminal, send logical (breaking) power supply of instruction control ac contactor coil by executive component.Described applied systems unit is to finish exchanges data and instruction control by setting up wireless network between wireless low-voltage distribution cabinet data collector terminal and the county telephone central office's server; Set up data real-time analysis, early warning, alarm and Remote operation in county telephone central office's server between SQL2005 database, data analysis module, real-time monitoring system module, the remote control module.
It is by be connected the 50mm place with the low-pressure line-outgoing cable at A, B, C phase RTO fuse contact type temperature sensor to be installed that the monitor temperature ultralimit is cut off power supply automatically; at the N 50mm place that is connected touch sensor is installed; and install the high-temperature-resisting silicon rubber sheath additional after using the high temperature resistant nylon band fixing and protected, be used for Real-Time Monitoring low-pressure line-outgoing cable surface voltage signal and carry out the digital quantity conversion through the water level of temperature transmitter.When A, B, C, N mutually wherein one road monitor temperature compare super upper prescribing a time limit with the terminal set point, by terminal transmission event to the real-time monitoring system module early warning of application system and send note to equipment manager; If during the super terminal set point of this road surfaces temperature limit; terminal will send event immediately to the intelligent residual current action protector of corresponding current supply circuit; disconnect protector line bag power supply by executive component; make the ac contactor coil outage; the AC contactor touch head system acting disconnects and stops the lower end power supply; this terminal is sent to county telephone central office's server with this event simultaneously, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.This event is to send corresponding intelligent residual current action protector ID number according to fixed point, guarantees disconnection and the Fault Isolation of this ring current, does not affect with other normal power supply loop in the cabinet the power supply of low-voltage customer.
The interior low-pressure line-outgoing power supply of automatic cutoff low power distribution cabinet was by fixedly mount the next level sensor at the liftoff 100mm of low-voltage distribution cabinet place when water overflow to upper level sensor; at the upper level sensor of liftoff 200mm place fixed installation; after water level of temperature transmitter data transaction, be sent to wireless low-voltage distribution cabinet data collector terminal by the water level sensor switch signal; to outgoing event, control intelligent residual current action protector is carried out dependent instruction by terminal.During such as the next water level sensor switch signal intensity, terminal after receiving signal, immediately through wireless network transmissions to county telephone central office's server, by the early warning of real-time monitoring system module and send note to equipment manager.If upper water level sensor switch signal intensity again; terminal can send event whole intelligent residual current action protector to the cabinet immediately; disconnect protector line bag power supply by executive component; make the ac contactor coil outage; the AC contactor touch head system acting disconnects and stops the lower end power supply; this terminal is sent to county telephone central office's server with this event simultaneously, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
It is by the fixed installation of 200mm place below low-voltage distribution cabinet A.C. contactor integral type current transformer that the super preset value of monitoring load cuts off power supply automatically; current transformer adopts USB interface to link to each other Real-Time Monitoring low-voltage power supply loop A, B, C phase current values with the intelligent residual current action protector.When the default definite value of the inner discriminating element of measured current value and intelligent residual current action protector compares; must deviate; then according to the character of deviation; the super upper limit; the transmission event is to wireless low-voltage distribution cabinet data collector terminal; through wireless network transmissions to county telephone central office's server, by the early warning of real-time monitoring system module and send note to equipment manager.Such as ultralimit; disconnect protector line bag power supply by executive component; make the ac contactor coil outage; the AC contactor touch head system acting disconnects and stops the lower end power supply; the event that sends simultaneously is to terminal; by terminal this event is transferred to county telephone central office's server, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.This event is only controlled the intelligent residual current action protector of this group current transformer of access, does not affect with other intelligent residual current action protector bringing normally into operation in the cabinet.
Automatically cutting off the current supply circuit power supply when the super preset value of zero-sequence current value or electric shock is by the fixed installation of 200mm place below low-voltage distribution cabinet current transformer zero sequence current mutual inductor; Real-time Collection zero-sequence current value; zero sequence current mutual inductor adopts aviation plug to link to each other with the intelligent residual current action protector; data detect the zero-sequence current value through intelligent residual current action protector discriminating element; when the super preset value of Real-time Collection zero-sequence current value; the intelligent residual current action protector sends event to executive component; disconnect protector line bag power supply by executive component and make the ac contactor coil outage; the AC contactor touch head system acting disconnects and stops the lower end power supply; the event that sends simultaneously is to terminal; by terminal this event is transferred to county telephone central office's server, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
Applied systems unit be utilize wireless low-voltage distribution cabinet data collector terminal real time data through wireless network transmissions to county telephone central office's server, then unloading is to the SQL2005 database, carry out computing, analysis, comparison by the data analysis module, again the result is shown by the real-time monitoring system module.Remote control module is to utilize human-computer dialogue; low-voltage distribution cabinet data collector terminal parameter setting that Remote is wireless, the specified leakage current of intelligent residual current action protector, overload preset value, minute (closing) lock, call operations such as surveying data, long-range test together in real time; instruction is issued to wireless low-voltage distribution cabinet data collector terminal through county telephone central office's server, sends corresponding event by terminal again and carries out to the intelligent residual current action protector.
The above only is specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification all are encompassed among the claim of the present utility model.

Claims (4)

1. a low-voltage distribution cabinet safety device improves structure; comprise low-voltage bus bar; described low-voltage bus bar connects at least one group of low-voltage power supply unit; described low-voltage power supply unit comprises A.C. contactor; fuse; A.C. contactor and fuse are installed on the low-pressure line-outgoing of being drawn by low-voltage bus bar in turn; described low-pressure line-outgoing terminal connects low-voltage customer; it is characterized in that: described low-pressure line-outgoing is equipped with current transformer at the upper end of fuse; zero sequence current mutual inductor and intelligent residual current action protector; the intelligent residual current action protector gathers the three-phase electricity flow valuve of current transformer monitoring and the zero-sequence current value of zero sequence current mutual inductor monitoring; described low-pressure line-outgoing is being installed contact type temperature sensor with the conductive surface of the next end of RTO fuse; described low-voltage distribution cabinet is being higher than installed surface setting position installation level sensor; described contact type temperature sensor and level sensor and water level of temperature transmitter establish a communications link; described water level of temperature transmitter and wireless low-voltage distribution cabinet data collector terminal establish a communications link; wireless low-voltage distribution cabinet data collector terminal and intelligent residual current action protector establish a communications link, and the voltage signal of contact type temperature sensor and the switching signal of level sensor reach wireless low-voltage distribution cabinet data collector terminal and analyse and compare and store and control simultaneously the action of intelligent residual current action protector after water level of temperature transmitter digital quantity conversion.
2. a kind of low-voltage distribution cabinet safety device according to claim 1 improves structure; it is characterized in that: described contact type temperature sensor uses the high temperature resistant nylon band to be fixed on the low-pressure line-outgoing, and the while contact type temperature sensor installs the high-temperature-resisting silicon rubber sheath outward additional to be protected.
3. a kind of low-voltage distribution cabinet safety device according to claim 1 improves structure; it is characterized in that: described low-voltage distribution cabinet is at the next level sensor of liftoff 100mm place fixed installation; at the upper level sensor of liftoff 200mm place fixed installation; when the next water level sensor switch signal intensity; after signal is received in wireless low-voltage distribution cabinet data collector terminal; transfer to immediately county telephone central office's server; by the early warning of real-time monitoring system module and send note to equipment manager; when upper water level sensor switch signal intensity; wireless low-voltage distribution cabinet data collector terminal is received and is sent immediately event whole intelligent residual current action protector to the low-voltage distribution cabinet behind the signal; the outage of intelligent residual current action protector control ac contactor coil; simultaneously wireless low-voltage distribution cabinet data collector terminal is sent to county telephone central office's server with this event, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
4. a kind of low-voltage distribution cabinet safety device according to claim 1 improves structure, it is characterized in that: a higher limit and a limiting value are set to the temperature data that transmits in described wireless low-voltage distribution cabinet data collector terminal, described limiting value temperature is higher than the higher limit temperature, when temperature data is higher than higher limit, send event to the early warning of real-time monitoring system module by wireless low-voltage distribution cabinet data collector terminal, the real-time monitoring system module sends note to the equipment manager mobile phone; When temperature data is higher than limiting value; wireless low-voltage distribution cabinet data collector terminal will send event immediately to the intelligent residual current action protector of corresponding current supply circuit; the outage of intelligent residual current action protector control ac contactor coil; simultaneously wireless low-voltage distribution cabinet data collector terminal is sent to county telephone central office's server with this event, through the alarm of real-time monitoring system module and synchronized transmission note to the equipment manager mobile phone.
CN2012202582978U 2012-05-31 2012-05-31 Improved structure of safety protection device of low-voltage distribution box Expired - Fee Related CN202663097U (en)

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Application Number Priority Date Filing Date Title
CN2012202582978U CN202663097U (en) 2012-05-31 2012-05-31 Improved structure of safety protection device of low-voltage distribution box

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102769277A (en) * 2012-05-31 2012-11-07 德清县供电局 Improved structure of safety protection device of low-voltage distribution cabinet
CN108832597A (en) * 2018-06-24 2018-11-16 冼汉生 A kind of electric power box control system and electric power box control method based on Internet of Things

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102769277A (en) * 2012-05-31 2012-11-07 德清县供电局 Improved structure of safety protection device of low-voltage distribution cabinet
CN102769277B (en) * 2012-05-31 2015-01-28 德清县供电局 Improved structure of safety protection device of low-voltage distribution cabinet
CN108832597A (en) * 2018-06-24 2018-11-16 冼汉生 A kind of electric power box control system and electric power box control method based on Internet of Things

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Granted publication date: 20130109

Termination date: 20200531