CN202906451U - Low-voltage distribution system with electrical leakage protection apparatus - Google Patents
Low-voltage distribution system with electrical leakage protection apparatus Download PDFInfo
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- CN202906451U CN202906451U CN 201220628601 CN201220628601U CN202906451U CN 202906451 U CN202906451 U CN 202906451U CN 201220628601 CN201220628601 CN 201220628601 CN 201220628601 U CN201220628601 U CN 201220628601U CN 202906451 U CN202906451 U CN 202906451U
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- earth leakage
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- 230000001681 protective effect Effects 0.000 claims description 30
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000001012 protector Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model discloses a low-voltage distribution system with an electrical leakage protection apparatus and belongs to the low-voltage distribution equipment technology field. The system comprises a main switch, a main electrical leakage protector, a distribution transformer and a branch switch distribution box. A branch in the branch switch distribution box is connected with a branch electrical leakage protector. Electrical leakage protection can be performed on each independent low-voltage branch line. Power supply of other branches is not influenced if an electrical leakage fault is generated in one branch so that security and reliability of the power supply can be greatly increased.
Description
Technical field
The utility model 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.
The utility model content
The technical problems to be solved in the utility model 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, technical solution adopted in the utility model 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 utility model 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 utility model;
Fig. 2 is the electrical block diagram of branch switch distribution box in the utility model.
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 utility model principle 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 do not know 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 |
|---|---|---|---|
| CN 201220628601 CN202906451U (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with electrical leakage protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220628601 CN202906451U (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with electrical leakage protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906451U true CN202906451U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220628601 Expired - Fee Related CN202906451U (en) | 2012-11-26 | 2012-11-26 | Low-voltage distribution system with electrical leakage protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202906451U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938558A (en) * | 2012-11-26 | 2013-02-20 | 保定供电公司 | Low-voltage distribution system with leakage protection device |
| CN114465195A (en) * | 2022-01-07 | 2022-05-10 | 国网河北省电力有限公司磁县供电分公司 | Leakage protection method, ammeter box and power grid system |
-
2012
- 2012-11-26 CN CN 201220628601 patent/CN202906451U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938558A (en) * | 2012-11-26 | 2013-02-20 | 保定供电公司 | Low-voltage distribution system with leakage protection device |
| CN114465195A (en) * | 2022-01-07 | 2022-05-10 | 国网河北省电力有限公司磁县供电分公司 | Leakage protection method, ammeter box and power grid system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID HEBEI ELECTRIC POWER COMPANY BAODING PO Effective date: 20131021 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: BAODING POWER SUPPLY COMPANY Effective date: 20131021 |
|
| 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 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131021 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: State Grid Hebei Electric Power Company Patentee after: Baoding Power Supply Branch Company, State Grid Hebei Electric Power Company Address before: 071000 No. 138 sunny north street, Hebei, Baoding Patentee before: Baoding Power Supply Company |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20171126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |