CN102938558A - Low-voltage distribution system with leakage protection device - Google Patents
Low-voltage distribution system with leakage protection device Download PDFInfo
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- CN102938558A CN102938558A CN2012104839469A CN201210483946A CN102938558A CN 102938558 A CN102938558 A CN 102938558A CN 2012104839469 A CN2012104839469 A CN 2012104839469A CN 201210483946 A CN201210483946 A CN 201210483946A CN 102938558 A CN102938558 A CN 102938558A
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Abstract
The invention discloses a low-voltage distribution system with a leakage protection device, belonging to the technical field of low-volatile distribution equipment. The low-voltage distribution system comprises a master switch, a master leakage protector, a distribution transformer and a branch switch distribution box, wherein a branch leakage protector is connected to a branch in the branch switch distribution box. The low-voltage distribution system can perform leakage protection on each independent low-voltage branch; and the power supply of other branches can not be influenced even if one branch has a leakage failure, thereby greatly improving the power supply safety and reliability.
Description
Technical field
The present invention relates to the low-voltage distribution apparatus technical field.
Background technology
At present, the electric leakage cascade protection mode that low voltage electric network is used is: the total protection of installing and final stage protection (scope of protection only limits to the single-phase power supply network of resident's illumination), and not installing middle rank protection.This incomplete earth leakage protective mode, the low-tension network for list, three-phase hybrid power supply exists dead angle and drawback.The total earth leakage protective device of low-voltage platform area is installed in and becomes in the platform JP cabinet; the final stage earth leakage protective device is installed in the electric supply meter case; because especially the flat-bottomed land every household substantially all uses three-phase water pump in the rural area; the water pump of buying in market and other power consumption equipment quality are very different; often the grounding phenomenon that leaks electricity can appear; certain customers cause the final stage leakage to protect and can not put into operation because of the reason of power consumption equipment; cause the total earth leakage protective device of change platform normally to use; cause the total protection of a great deal of low-voltage platform area electric leakage out of service, otherwise whole district can't power.Simultaneously, low pressure branched line Maintenance and Repair Comparision is many, and a repair and maintenance will have a power failure to whole district, have a strong impact on resident living power utility, affect power supply reliability.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of low-voltage distribution system with earth leakage protective device; it can carry out earth leakage protective to each independent low pressure branched line; leak current fault appears in a branch road can not affect other branch road power supply, can greatly improve fail safe, the reliability of power supply.
For solving the problems of the technologies described above, the technical solution used in the present invention is: it comprises master switch and total earth leakage protective device, distribution transformer, branch switch distribution box, and the branch road in the branch switch distribution box is connected with the branch road earth leakage protective device.
The present invention further improves and is: the branch road earth leakage protective device is positioned at the branch switch leading-out terminal; It is 100mA-800mA that the branch road earth leakage protective device allows leakage current.
The beneficial effect that adopts technique scheme to produce is: the branch road in the branch switch distribution box is connected with the branch road power distribution protector; can carry out earth leakage protective to each branched line; avoided causing total earth leakage protective device can't normally use the Electrical Safety accident that may cause because of the quality problems of part power consumption equipment; and be convenient to keep in repair; when certain branch road generation leak current fault; this branch road can carry out earth leakage protective and cut off the electricity supply; can overhaul the branch road that causes electric leakage targetedly; leak current fault appears in a branch road can not affect other branch road power supply, can greatly improve the fail safe of power supply; reliability.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the electrical block diagram of branch switch distribution box among the present invention.
In the accompanying drawings: 1, branch switch distribution box; 2, distribution transformer; 3, master switch and total earth leakage protective device; 4, power consumer; QF, branch road earth leakage protective device; HK, branch switch; A, the first phase line; B, the second phase line; C, third phase line; N, the neutral line.
Embodiment
By the embodiment shown in Fig. 1-2 as can be known; it comprises branch switch distribution box 1; this branch switch distribution box 1 overall dimension: 70 * 25 * 20cm (length * wide * height); the outside is the stainless steel casing; the top is the anti-error property knife switch (200A) that is connected with branch road in the casing; row is connected with the QLLT-250 branch road earth leakage protective device of below by aluminium; the permission leakage current is 100mA-800mA; make anti-error property knife switch and branch road earth leakage protective device organic assembling; the lower end is two low-voltage circuit manhole appendixs; at the casing dorsal part four fixed heads are arranged, be fastened on the low-voltage circuit electric pole by anchor ear.
The principle of the invention and advantage:
In low-voltage distribution system; when the branch switch distribution box is not installed earth leakage protective device; if the leakage current fault that transfinites appears in certain branch road; can not make the outage of this power supply branch road; its leakage current can show on total earth leakage protective device; because the effect of the leakage current of other branch road (in the allowed band) stack; cause total earth leakage protective device action; whole district stopped power supply, other normal branch road is caused power outage, have a strong impact on user's life productive power; cause unnecessary loss; power supply reliability is impacted, and owing to not knowing concrete any bar branch road generation problem, can produce certain impact to the efficient of maintenance.And when the branch switch distribution box is installed earth leakage protective device; if the leakage current fault that transfinites appears in certain branch road; earth leakage protective device in this branch switch distribution box can move, and cuts off the electricity supply, thereby plays leakage protection; to ensure the safety of this power supply branch road; and can not have influence on the normal power supply of other power supply branch road, simultaneously the branch road that leak current fault occurs be played suggesting effect, to remind the maintainer this branch road be keeped in repair; save the repair time, improved operating efficiency.
Claims (3)
1. low-voltage distribution system with earth leakage protective device; comprise master switch and total earth leakage protective device (3), distribution transformer (2), branch switch distribution box (1), it is characterized in that: the branch road in branch switch distribution box (1) is connected with branch road earth leakage protective device QF.
2. a kind of low-voltage distribution system with earth leakage protective device according to claim 1 is characterized in that described branch road earth leakage protective device QF is positioned at branch switch HK leading-out terminal.
3. a kind of low-voltage distribution system with earth leakage protective device according to claim 1 is characterized in that described branch road earth leakage protective device QF allows leakage current 100mA-800mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104839469A CN102938558A (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with leakage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104839469A CN102938558A (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with leakage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102938558A true CN102938558A (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104839469A Pending CN102938558A (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with leakage protection device |
Country Status (1)
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| CN (1) | CN102938558A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972863A (en) * | 2014-04-17 | 2014-08-06 | 朱开久 | Real-time detection and control device for shunt electric leakage |
| CN104409976A (en) * | 2014-12-01 | 2015-03-11 | 苏州立瓷电子技术有限公司 | LED display screen power supply system |
| CN105226634A (en) * | 2014-05-27 | 2016-01-06 | 首瑞（北京）投资管理集团有限公司 | A kind of (TT) distribution system |
| CN106300222A (en) * | 2016-10-30 | 2017-01-04 | 陈勇 | The electric wire under water increasing short-circuit protection connects water-tight device |
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| CN2636462Y (en) * | 2003-07-15 | 2004-08-25 | 武汉安全环保研究院 | Leakage and electric shock protection distribution cabinet |
| CN1667906A (en) * | 2004-03-08 | 2005-09-14 | 刘顺民 | Time-delay operation leakage circuit breaker |
| CN102185296A (en) * | 2011-04-27 | 2011-09-14 | 江苏大学 | Selective electric leakage protection device and method for mine low-voltage power supply system |
| CN102306930A (en) * | 2011-09-14 | 2012-01-04 | 渭南供电局 | Trip system of total residual current operated protector of distribution area and application method thereof |
| CN202906451U (en) * | 2012-11-26 | 2013-04-24 | 保定供电公司 | Low-voltage distribution system with electrical leakage protection apparatus |
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2012
- 2012-11-26 CN CN2012104839469A patent/CN102938558A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2636462Y (en) * | 2003-07-15 | 2004-08-25 | 武汉安全环保研究院 | Leakage and electric shock protection distribution cabinet |
| CN1667906A (en) * | 2004-03-08 | 2005-09-14 | 刘顺民 | Time-delay operation leakage circuit breaker |
| CN102185296A (en) * | 2011-04-27 | 2011-09-14 | 江苏大学 | Selective electric leakage protection device and method for mine low-voltage power supply system |
| CN102306930A (en) * | 2011-09-14 | 2012-01-04 | 渭南供电局 | Trip system of total residual current operated protector of distribution area and application method thereof |
| CN202906451U (en) * | 2012-11-26 | 2013-04-24 | 保定供电公司 | Low-voltage distribution system with electrical leakage protection apparatus |
Non-Patent Citations (3)
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| 张广科等: "农村低压电网漏电保护器的合理配置", 《电气试验》 * |
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| 邹彦详等: "浅谈农村低压电网漏电分级保护", 《科技信息》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972863A (en) * | 2014-04-17 | 2014-08-06 | 朱开久 | Real-time detection and control device for shunt electric leakage |
| CN105226634A (en) * | 2014-05-27 | 2016-01-06 | 首瑞（北京）投资管理集团有限公司 | A kind of (TT) distribution system |
| CN104409976A (en) * | 2014-12-01 | 2015-03-11 | 苏州立瓷电子技术有限公司 | LED display screen power supply system |
| CN106300222A (en) * | 2016-10-30 | 2017-01-04 | 陈勇 | The electric wire under water increasing short-circuit protection connects water-tight device |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID HEBEI ELECTRIC POWER COMPANY BAODING PO Effective date: 20131018 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: BAODING POWER SUPPLY COMPANY Effective date: 20131018 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 071000 BAODING, HEBEI PROVINCE TO: 100031 XICHENG, BEIJING |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20131018 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: State Grid Hebei Electric Power Company Applicant after: Baoding Power Supply Branch Company, State Grid Hebei Electric Power Company Address before: 071000 No. 138 sunny north street, Hebei, Baoding Applicant before: Baoding Power Supply Company |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130220 |