CN201616628U - Distribution box for construction technology - Google Patents
Distribution box for construction technology Download PDFInfo
- Publication number
- CN201616628U CN201616628U CN2010201105135U CN201020110513U CN201616628U CN 201616628 U CN201616628 U CN 201616628U CN 2010201105135 U CN2010201105135 U CN 2010201105135U CN 201020110513 U CN201020110513 U CN 201020110513U CN 201616628 U CN201616628 U CN 201616628U
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- Prior art keywords
- phase
- circuit breaker
- distribution box
- residual current
- current circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a distribution box for construction technology, which comprises a three-phase fuse-type isolation switch, a three-phase residual current circuit breaker, a three-phase circuit breaker, a single-phase circuit breaker and a three-phase electric energy meter. The three-phase residual current circuit breaker is electrically connected with the fused-type isolation switch through a copper bar; the three-phase electric energy meter obtains power from the position of the fuse-type isolation switch through a current mutual inductor; and a zero wire of the three-phase circuit breaker is grounded through a power frequency grounding resistor. The distribution box adopts the mode that the zero wire is grounded through the grounding resistor, thereby effectively improving reliability of the residual current circuit breaker, and reducing electrical shock accidents.
Description
Technical field
The utility model is the interim power distribution equipment of a kind of construction site.
Background technology
Electric shock is one of building trade five major injuries, and according to statistics, electric shock accidents rises to second in " five major injuries ".The job site temporary electricity should strictly be carried out the regulation of " job site temporary electricity technical specification of security " the existing relevant compulsory standard of regulation and country (JGJ46-2005).But because the job site scope of operation is many, workman's professional qualities are not strong, and civilian worker, casual labour are many, can not operate according to the rules at the scene, cause electric shock accidents to happen occasionally.
Summary of the invention
The purpose of this utility model is to provide the electricity consumption of a kind of energy standard construction site safety, stops the construction distribution box that electric shock accidents takes place.
For achieving the above object, the technical solution adopted in the utility model construction distribution box, it comprises three-phase Fuse Type isolating switch, three-phase residual current circuit breaker, three-phase breaker, single-phase circuit breaker and three phase watt-hour meter, described three-phase residual current circuit breaker electrically connects by copper bar and described Fuse Type isolating switch, from the power taking of described Fuse Type isolating switch, described three-phase leaks the zero line of disconnected circuit breaker by power frequency earthing resistance ground connection to described three phase watt-hour meter by current transformer.
The resistance of described power frequency earthing resistance is not more than 10 Ω.
Adopt earth resistance with zero line ground connection in this programme, when construction took place to get an electric shock, residual current circuit breaker can effectively trip, and has reduced the generation of electric shock accidents.
Description of drawings
Fig. 1 is this distribution box circuit interconnect pattern.
Embodiment
At the construction field (site), external power supply often is four lines (A, B, C, N).N directly connects the N utmost point of 3P+N residual current circuit breaker, and by earth electrode ground connection, power frequency earthing resistance is not more than 10 Ω to zero line, is easy-to-connect, establishes the PE busbar in distribution box herein, and PE busbar and distribution box are done reliably and be electrically connected.A, B, C connect three utmost point Fuse Type isolating switches, be connected to the P utmost point of 3P+N residual current circuit breaker with line row through A, B behind the Fuse Type isolating switch, C, A, the B, the C that draw from the 3P+N residual current circuit breaker are divided into three the tunnel with busbar and connect three three-phase breakers, draw N line and PE line from residual current circuit breaker, formed local T N-S system.Satisfy job site security needs and " job site temporary electricity technical specification of security " regulation (JGJ46-2005).Mains side A, B, the C busbar of 3P+N residual current circuit breaker connect current transformer respectively, three ammeters of the star-like edge joint of current transformer, and connect three-phase watt-hour meter.Draw three flexible cords respectively from mains side A, B, the C busbar of 3P+N residual current circuit breaker and connect voltmeter and two power supply indicators by change over switch.For the building site provides electric consumption on lighting,, connect lighting for easily through single-phase active watt-hour meter, P+N residual current circuit breaker from residual current circuit breaker mains side one single-phase loop L, N.The interim distribution in job site requires three grades of distribution, promptly divides three levels step by step provide and deliver electric power through minute distribution box to switch-box by consumer unit.This distribution box has been gathered one-level, secondary distribution box, is applicable to easily apart from the nearer load of distribution box, and has saved investment.Install leakage switch in the distribution box, also installed leakage switch in all switch-boxes, formed two-stage earth leakage protective.
Claims (2)
1. construction distribution box, it comprises three-phase Fuse Type isolating switch, three-phase residual current circuit breaker, three-phase breaker, single-phase circuit breaker and three phase watt-hour meter, described three-phase residual current circuit breaker electrically connects by copper bar and described Fuse Type isolating switch, described three phase watt-hour meter by current transformer from the power taking of described Fuse Type isolating switch, it is characterized in that the zero line of described three-phase residual current circuit breaker is by power frequency earthing resistance ground connection.
2. according to the described construction distribution box of claim 1, it is characterized in that the resistance of described power frequency earthing resistance is not more than 10 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201105135U CN201616628U (en) | 2010-02-09 | 2010-02-09 | Distribution box for construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201105135U CN201616628U (en) | 2010-02-09 | 2010-02-09 | Distribution box for construction technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201616628U true CN201616628U (en) | 2010-10-27 |
Family
ID=43002990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201105135U Expired - Fee Related CN201616628U (en) | 2010-02-09 | 2010-02-09 | Distribution box for construction technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201616628U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931543A (en) * | 2016-07-11 | 2016-09-07 | 江苏建筑职业技术学院 | Temporary electricity utilization hazard source identification experience area and application method |
| CN106786260A (en) * | 2017-03-23 | 2017-05-31 | 国网福建省电力有限公司 | A kind of movable detachable flip-shell distribution box |
-
2010
- 2010-02-09 CN CN2010201105135U patent/CN201616628U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931543A (en) * | 2016-07-11 | 2016-09-07 | 江苏建筑职业技术学院 | Temporary electricity utilization hazard source identification experience area and application method |
| CN106786260A (en) * | 2017-03-23 | 2017-05-31 | 国网福建省电力有限公司 | A kind of movable detachable flip-shell distribution box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20101027 Termination date: 20110209 |