CN103248000A - Intelligent electronic type low-voltage distribution transformer fuse box - Google Patents
Intelligent electronic type low-voltage distribution transformer fuse box Download PDFInfo
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- CN103248000A CN103248000A CN2013101487960A CN201310148796A CN103248000A CN 103248000 A CN103248000 A CN 103248000A CN 2013101487960 A CN2013101487960 A CN 2013101487960A CN 201310148796 A CN201310148796 A CN 201310148796A CN 103248000 A CN103248000 A CN 103248000A
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Abstract
The invention discloses an intelligent electronic type low-voltage distribution transformer fuse box, and belongs to the field of emergency protection devices. The fuse box comprises a line overload protection module which is arranged in a box body, wherein the line overload protection module comprises a mutual inductor group, a breaker switch and a control unit; the mutual inductor group is connected in series in a three-phase major loop and used for measuring load current values of phases of the major loop in real time and transmitting measurement results to the control unit; the breaker switch is used for disconnecting or connecting a three-phase circuit of the major loop under the control of the control unit; and the control unit compares an absolute value of a load current value of each phase or a variation trend of load current of each phase of the major loop with a set value, performs 'tripping' or 'switching-on' operation control on the breaker switch, and remotely transmits the line load current and the state of the breaker switch to an upper computer in a digital signal manner. By means of intelligent electronic type low-voltage distribution transformer fuse box, intelligent upgrading of a product is achieved, and an operation requirement of an intelligent power grid is met. The intelligent electronic type low-voltage distribution transformation fuse box can be widely applied to the intelligent control field of low-voltage distribution transformer systems.
Description
Technical field
The invention belongs to emergency protective circuit device field, relate in particular to a kind of emergency protective circuit device for low-voltage power supply and distribution system.
Background technology
Along with the raising of economic development and living standards of the people, the urban power consumption is significantly rises, and the outdoor pole transformer device of the power distribution network of city 10kV is more and more at present, and supporting with it distribution transforming fuse box use amount also increases year by year.
The low-voltage distribution transformer fuse box is that the outdoor bar of low-voltage distribution electrical network becomes one of equipment important in the device; it is installed between step-down side and the low voltage electric network; both can be used as the short circuit of low voltage electric network and the protective device of overload, and can realize the input of low voltage electric network and cut off operation by operation its " branch ", " closing " again.
The internal core of low-voltage distribution transformer fuse box is a low-tension fuse formula load-break switch, and its short circuit and overload protection adopt low pressure grid formula cartridge fuse-link as the fuse protection element.But adopt grid formula cartridge fuse-link as fuse-link heating temp height when the load peak, and insulating material ageing failure very easily under the alternating hot and cold effect, thereby its reliability and stability influenced.
Intelligent grid is an electric power system that is made of the transmission and disttrbution system of numerous automations, realizes all electrical network runnings with coordination, effective and reliable mode, has self-healing function; Respond electricity market and business event demand fast; Have intelligentized communication construction, realization is information flow in real time, safely and flexibly, for the user provides reliable, economic electrical power services.
Exactly because this special advantages, intelligent grid become the important component part of many national sustainable development strategies gradually, development rapidly.
The essential characteristic of the intelligent grid of China is to realize informationization, automation, interactive technically.
As one of indispensable visual plant of distribution network, the intelligentized updating transformation of low-voltage distribution transformer fuse box has important and practical meanings to the intellectuality of whole distribution network.Traditional mechanical type distribution transforming fuse box can not satisfy intelligent grid to the requirement of power distribution network informationization, automation, if not adding improvement just lets alone to remain running in the intelligent power distribution network, because it does not possess automation performances such as information monitoring, transfer of data or telemechanical operation, there is hidden danger in stability to intelligent grid, can the serious process that hinders the low voltage power transmission system intelligent.
For adapting to the requirement of domestic intelligent grid, the particularly development of intelligent grid equipment manufacture, press for a kind of features/functionality that can realize existing low-voltage distribution transformer fuse box, can satisfy the intelligent grid networking requirement again, low-voltage distribution transformer fuse box class device with automation performances such as information monitoring, transfer of data or telemechanical operations is to adapt to the Intelligent Developing Trends of whole country electrical network.
Summary of the invention
Technical problem to be solved by this invention provides a kind of intelligent electric minor low-voltage distribution transformer fuse box, its can avoid adopting grid formula cartridge fuse-link as fuse-link in load heating temp height and insulating material defective of ageing failure very easily under the alternating hot and cold effect during peak.
Technical scheme of the present invention is: a kind of intelligent electric minor low-voltage distribution transformer fuse box is provided, comprises the circuit overload protection module that is arranged in the casing, it is characterized in that:
Described circuit overload protection module comprises instrument transformer group, killer switch and control unit;
Its described instrument transformer group is serially connected in the three-phase major loop, is used for measuring in real time the load current value of each phase of major loop, and measurement result is sent to described control unit;
Its described killer switch is used for cutting off or connect the three-phase circuit of major loop under the control of control unit;
Its described control unit is with the variation tendency of order of magnitude or each phase load electric current of each phase load current value of major loop, compare with set point, killer switch is carried out " tripping operation " or " combined floodgate " operation control, and line load electric current, circuit breaker switch state and low-voltage distribution transformer fuse box internal environment parameter externally exported with the form of digital signal, host computer is given in teletransmission.
Concrete; the real physical characteristics curve of described circuit overload protection module simulation fuse; " tripping operation " or " combined floodgate " operation of control killer switch; realize the side circuit defencive function of fuse, with avoid adopting grid formula cartridge fuse-link as fuse-link heating temp when the load peak the high and insulating material defective of ageing failure very easily under the alternating hot and cold effect.
Further, the real physical characteristics curve of its described fuse comprises the anti-time limit characteristic of fuse.
Compared with the prior art, advantage of the present invention is:
1, simulates the real physical characteristics curve of fuse by the circuit overload protection module, " tripping operation " or " combined floodgate " operation of control killer switch, realize the side circuit defencive function of fuse, can avoid adopting grid formula cartridge fuse-link as fuse-link heating temp when the load peak the high and insulating material defective of ageing failure very easily under the alternating hot and cold effect;
2, but the circuit breaker repeated multiple times is jumped/closing operation, long service life, and maintenance workload is little, both has been conducive to environmental protection, can reduce line upkeep/replacing workload again;
3, adopt control unit that electric current or the ambient conditions signal of gathering carried out the logic analysis judgement, very big function expansibility is arranged, can be to line fault information record and remote transmission, and because use is the low power consuming components and parts, the caloric value of whole switch reduces greatly, meets life idea and the requirement of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is electrical block diagram of the present invention.
1 is the circuit overload protection module among the figure, and 2 is control unit, and 3 is the current transformer group, and 4 is circuit breaker, and 5 is host computer, and B is transformer.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Among Fig. 1, technical scheme of the present invention provides a kind of intelligent electric minor low-voltage distribution transformer fuse box, and described intelligent electric minor low-voltage distribution transformer fuse box is arranged between the low-voltage output and low-voltage network of bar following formula transformer B.
Described intelligent electric minor low-voltage distribution transformer fuse box comprises the circuit overload protection module 1 that is arranged in the casing, and its described circuit overload protection module comprises instrument transformer group 3, killer switch 4 and control unit 2.
Its described instrument transformer group is serially connected in the three-phase major loop, is used for measuring in real time the load current value of each phase of major loop, and measurement result is sent to described control unit.
Its described killer switch is used under the control of described control unit, the three-phase circuit of " cut-out " or " connection " transformer low voltage output.
Its described control unit is with the variation tendency of order of magnitude or each phase load electric current of each phase load current value of major loop, compare with set point, killer switch is carried out " tripping operation " or " combined floodgate " operation control, and line load electric current, circuit breaker switch state and low-voltage distribution transformer fuse box internal environment parameter externally exported with the form of digital signal, host computer 5 is given in teletransmission.
Concrete; the real physical characteristics curve of described circuit overload protection module simulation fuse; " tripping operation " or " combined floodgate " operation of control killer switch; realize the side circuit defencive function of fuse, with avoid adopting grid formula cartridge fuse-link as fuse-link heating temp when the load peak the high and insulating material defective of ageing failure very easily under the alternating hot and cold effect.
Further, the real physical characteristics curve of its described fuse comprises the anti-time limit characteristic of fuse.
The present invention is on the basis of original distribution transforming fuse box circuit function; adopt control unit and electronic component to substitute fuse element; both can be used as the short circuit of low voltage electric network and the protective device of overload, and can realize the input of low voltage electric network and cut off operation by operation its " branch ", " closing " again.Also can realize information gathering, the teleinstruction control of distribution line failure, realize the intelligentized updating of product, can satisfy the operation needs of intelligent grid.
The present invention can be widely used in the intellectuality control field of low pressure transformation and distribution system.
Claims (3)
1. an intelligent electric minor low-voltage distribution transformer fuse box comprises the circuit overload protection module that is arranged in the casing, it is characterized in that:
Described circuit overload protection module comprises instrument transformer group, killer switch and control unit;
Its described instrument transformer group is serially connected in the three-phase major loop, is used for measuring in real time the load current value of each phase of major loop, and measurement result is sent to described control unit;
Its described killer switch is used for cutting off or connect the three-phase circuit of major loop under the control of control unit;
Its described control unit is with the variation tendency of order of magnitude or each phase load electric current of each phase load current value of major loop, compare with set point, killer switch is carried out " tripping operation " or " combined floodgate " operation control, and line load electric current, circuit breaker switch state and low-voltage distribution transformer fuse box internal environment parameter externally exported with the form of digital signal, host computer is given in teletransmission.
2. according to the described intelligent electric minor of claim 1 low-voltage distribution transformer fuse box; the real physical characteristics curve that it is characterized in that described circuit overload protection module simulation fuse; " tripping operation " or " combined floodgate " operation of control killer switch; realize the side circuit defencive function of fuse, with avoid adopting grid formula cartridge fuse-link as fuse-link heating temp when the load peak the high and insulating material defective of ageing failure very easily under the alternating hot and cold effect.
3. according to the described intelligent electric minor of claim 1 low-voltage distribution transformer fuse box, the real physical characteristics curve that it is characterized in that described fuse comprises the anti-time limit characteristic of fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101487960A CN103248000A (en) | 2013-04-25 | 2013-04-25 | Intelligent electronic type low-voltage distribution transformer fuse box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101487960A CN103248000A (en) | 2013-04-25 | 2013-04-25 | Intelligent electronic type low-voltage distribution transformer fuse box |
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| Publication Number | Publication Date |
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| CN103248000A true CN103248000A (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101487960A Pending CN103248000A (en) | 2013-04-25 | 2013-04-25 | Intelligent electronic type low-voltage distribution transformer fuse box |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601102U (en) * | 2009-10-23 | 2010-10-06 | 上海电力线路器材有限公司 | Electronic type low-voltage distribution transform fuse block |
| CN201853666U (en) * | 2010-11-19 | 2011-06-01 | 南京鼎牌电器有限公司 | Residual current control and protection switch for distribution circuit |
-
2013
- 2013-04-25 CN CN2013101487960A patent/CN103248000A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601102U (en) * | 2009-10-23 | 2010-10-06 | 上海电力线路器材有限公司 | Electronic type low-voltage distribution transform fuse block |
| CN201853666U (en) * | 2010-11-19 | 2011-06-01 | 南京鼎牌电器有限公司 | Residual current control and protection switch for distribution circuit |
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Application publication date: 20130814 |