CN103001198A - Power box - Google Patents

Power box Download PDF

Info

Publication number
CN103001198A
CN103001198A CN2012105346153A CN201210534615A CN103001198A CN 103001198 A CN103001198 A CN 103001198A CN 2012105346153 A CN2012105346153 A CN 2012105346153A CN 201210534615 A CN201210534615 A CN 201210534615A CN 103001198 A CN103001198 A CN 103001198A
Authority
CN
China
Prior art keywords
earth leakage
leakage protective
protective device
power supply
leakage
Prior art date
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.)
Pending
Application number
CN2012105346153A
Other languages
Chinese (zh)
Inventor
高鹏
刘靖峰
许军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Original Assignee
Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd filed Critical Handan Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority to CN2012105346153A priority Critical patent/CN103001198A/en
Publication of CN103001198A publication Critical patent/CN103001198A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a power box. A plurality of subsidiary leakage protectors (2) are connected in parallel on an output line of a main leakage protector (1). A subsidiary knife switch (3) is arranged on an output line of each of the subsidiary leakage protectors (2). The sum of rated leakage operating currents of all the subsidiary leakage protectors (2) is smaller than or equal to a rated leakage operating current of the main leakage protector (1). A main knife switch (4) is arranged on an inlet wire of the main leakage protector (1). Compared with the prior art, operating currents and time of the subsidiary leakage protectors (2) can be set according to a power box power supply radius and load characteristics, and override tripping cannot occur, so that the construction power supply reliability is guaranteed. Further, as a zero line uses terminal block wiring, leakage protector tripping caused by the mistaken connecting of the zero line in ground blocks in construction is eradicated.

Description

Power supply box
Technical field
The present invention relates to a kind of power supply box, especially a kind of " machine, a lock, leak " power supply box.
Background technology
At present, the power supply box of prior art is a plurality of knife switches in parallel on the output line of total earth leakage protective device, can only realize " machine, a lock ", and creepage protection function is realized by the total earth leakage protective device in the distribution box, exists overstep tripping to enlarge the defective of power failure range.Therefore, designing a kind of " machine, a lock, leak " power supply box, is the present technical issues that need to address.
Summary of the invention
[0003] technical problem to be solved by this invention provides a kind of " machine, a lock, leak " power supply box.
The technical scheme that the present invention solves its technical problem is:
Power supply box; output line at total earth leakage protective device is parallel with several minutes earth leakage protective device; the output line of earth leakage protective device is provided with a minute knife switch in each minute; the rated residual operating current of the rated residual operating current sum of all minute earth leakage protective devices≤total earth leakage protective device is provided with total knife switch at the inlet wire of total earth leakage protective device.
Preferably, described total earth leakage protective device is the three-phase and four-line earth leakage protective device.
Preferably, described minute earth leakage protective device is three-phase and four-line earth leakage protective device, phase three-wire three earth leakage protective device and or monophase leakage protector.
Preferably, zero line adopts terminal row wiring.
Preferably, total knife switch and all divide knife switch all to dispose outgoing line terminal board, and working zero line and protection ground wire busbar are set in the power supply box.
Compared with prior art, the present invention since operating current and time of earth leakage protective devices at different levels can adjust by power supply box radius of electricity supply and load character, can overstep tripping, guaranteed the reliability of power supply for construction.In addition, because zero line adopts terminal row wiring, the generation that causes the earth leakage protective device trip condition is arranged in the zero line misconnection with entering in having stopped to construct.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
As shown in the figure; power supply box; be parallel with several minutes earth leakage protective device 2 at the output line of total earth leakage protective device 1; each minute earth leakage protective device 2 output line be provided with minute knife switch 3; the rated residual operating current of the rated residual operating current sum of all minute earth leakage protective devices≤total earth leakage protective device 1 is provided with total knife switch 4 at the inlet wire of total earth leakage protective device 1.
Described total earth leakage protective device 1 is the three-phase and four-line earth leakage protective device.
Described minute earth leakage protective device 2 is three-phase and four-line earth leakage protective device, phase three-wire three earth leakage protective device and or monophase leakage protector.
Zero line adopts terminal row wiring.
Total knife switch 4 and all divide knife switch 3 all to dispose outgoing line terminal board, and working zero line and protection ground wire busbar are set in the power supply box.

Claims (5)

1. power supply box; it is characterized in that; output line at total earth leakage protective device (1) is parallel with several minutes earth leakage protective device (2); output line at each minute earth leakage protective device (2) is provided with a minute knife switch (3); the rated residual operating current of the rated residual operating current sum of all minute earth leakage protective devices≤total earth leakage protective device (1) is provided with total knife switch (4) at the inlet wire of total earth leakage protective device (1).
2. power supply box according to claim 1 is characterized in that, described total earth leakage protective device (1) is the three-phase and four-line earth leakage protective device.
3. power supply box according to claim 1 is characterized in that, described minute earth leakage protective device (2) be three-phase and four-line earth leakage protective device, phase three-wire three earth leakage protective device and or monophase leakage protector.
4. described any power supply box is characterized in that according to claim 1-3, and zero line adopts terminal row wiring.
5. described any power supply box is characterized in that according to claim 1-3, and total knife switch (4) and all divide knife switch (3) all to dispose outgoing line terminal board, and working zero line and protection ground wire busbar are set in the power supply box.
CN2012105346153A 2012-12-12 2012-12-12 Power box Pending CN103001198A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012105346153A CN103001198A (en) 2012-12-12 2012-12-12 Power box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012105346153A CN103001198A (en) 2012-12-12 2012-12-12 Power box

Publications (1)

Publication Number Publication Date
CN103001198A true CN103001198A (en) 2013-03-27

Family

ID=47929471

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012105346153A Pending CN103001198A (en) 2012-12-12 2012-12-12 Power box

Country Status (1)

Country Link
CN (1) CN103001198A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104577973A (en) * 2013-10-16 2015-04-29 汪龙渊 Multifunctional electric leakage protection device
CN105576528A (en) * 2016-01-11 2016-05-11 国网山东省电力公司青岛供电公司 AC/DC power supply transfer box and comprehensive automation transformation method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2197759Y (en) * 1994-10-10 1995-05-17 牛万新 Safety distributing box
JP2005184945A (en) * 2003-12-18 2005-07-07 Mitsubishi Electric Corp Load connection type distribution line
CN201387994Y (en) * 2008-12-08 2010-01-20 安徽电力芜湖县供电有限责任公司 Modular distribution cabinet with grounding knife switch
CN202084915U (en) * 2011-04-27 2011-12-21 江苏大学 Selective leakage protection device for mine low-voltage power supply system
CN203056561U (en) * 2012-12-12 2013-07-10 邯郸供电公司 Power box

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2197759Y (en) * 1994-10-10 1995-05-17 牛万新 Safety distributing box
JP2005184945A (en) * 2003-12-18 2005-07-07 Mitsubishi Electric Corp Load connection type distribution line
CN201387994Y (en) * 2008-12-08 2010-01-20 安徽电力芜湖县供电有限责任公司 Modular distribution cabinet with grounding knife switch
CN202084915U (en) * 2011-04-27 2011-12-21 江苏大学 Selective leakage protection device for mine low-voltage power supply system
CN203056561U (en) * 2012-12-12 2013-07-10 邯郸供电公司 Power box

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104577973A (en) * 2013-10-16 2015-04-29 汪龙渊 Multifunctional electric leakage protection device
CN105576528A (en) * 2016-01-11 2016-05-11 国网山东省电力公司青岛供电公司 AC/DC power supply transfer box and comprehensive automation transformation method

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Application publication date: 20130327