CN104037623A - Outdoor connection terminal box protection method - Google Patents
Outdoor connection terminal box protection method Download PDFInfo
- Publication number
- CN104037623A CN104037623A CN201410236631.3A CN201410236631A CN104037623A CN 104037623 A CN104037623 A CN 104037623A CN 201410236631 A CN201410236631 A CN 201410236631A CN 104037623 A CN104037623 A CN 104037623A
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- China
- Prior art keywords
- cable
- terminal box
- connection terminal
- protection method
- ventilation
- 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.)
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Abstract
The invention relates to the power supply field, particularly relates to an outdoor connection terminal box protection method. According to the outdoor connection terminal box protection method, the horizontal distance between a terminal box center and a cable trench cover plate center is from 1 to 3 m; a cable insertion hole is formed in the cable trench cover plate; a protruding edge which is 5 to 10 cm higher than the horizontal plane is arranged on the upper side of the insertion hole; the upper side of the protruding edge sleeves a lower opening of a ventilation tee joint; an upper opening of the ventilating tee joint is opened to ventilate and is provided with a rainproof cap; a third opening in the lateral side of the ventilation tee joint is used for inducing the cable; the cable is connected with the bottom of the terminal box through a cable penetrating pipe. The outdoor connection terminal box protection method thoroughly solves the problem that moisture permeates to the box.
Description
Technical field
The present invention relates to for electrical domain, specifically a kind of outdoor wiring terminal box means of defence.
Background technology
The electrical secondary system such as protection, the monitoring cable of Outdoor Trusses For Transformer Substation equipment, terminal box nipple out of doors, then secondary cable goes downwards to cable trough, then arrives the basement of master-control room, is then up to master-control room, receives the equipment such as protection cabinet.Outdoor Terminal Case should have good Rainproof moisture-proof performance, the reliability service of guarantee electrical secondary system.Still have at present the most terminal boxs in use, although casing itself is rainproof, sealing, Design of ventilation reach certain requirement, but owing to being directly installed on cable channel cover plate top, in cable trough, there is infiltration just to cause the interior moisture of ditch serious, a large amount of moisture is upward through cable shutoff gap, terminal box bottom and enters relatively airtight cabinet space, in the time that humidity acquires a certain degree, cause DC ground fault.Operator on duty can only open chamber door conventionally, strengthens and ventilates, and wait DC earthing is eliminated naturally.During DC earthing, the risk of protecting malfunction or tripping is still being carried on a shoulder pole in equipment operation.Fundamentally do not solve the problem that moisture infiltrates casing.
Summary of the invention
Technical problem to be solved by this invention is: the problem that how thoroughly to solve moisture infiltration casing.
The technical solution adopted in the present invention is: outdoor wiring terminal box means of defence, terminal box center and cable channel cover plate central horizontal distance are at 1m-3m, there is cable punching hole at cable channel cover plate center, perforation upside has the nosing that exceeds horizontal plane 5cm-10cm, above nosing, be enclosed within ventilation threeway end opening, ventilation threeway Opening Ventilation suitable for reading is also installed rainhat, and the 3rd mouthful of ventilation threeway side is in order to outgoing cable, and cable is connected with terminal box bottom by penetration pipe.
The invention has the beneficial effects as follows: the present invention is simple, with low cost, cable trough moisture is just drained at cable trace front end, ensure terminal box relatively dry, avoid direct current generation earth fault.The harm of DC earthing in brief, may make to protect malfunction exactly, causes power outage; When local generation primary fault, protection tripping, causes overstep tripping, expands power failure range, expansion accident.Therefore, the DC earthing of avoiding terminal box humidity to cause, has just avoided above-mentioned accident, ensures that power supply unit normally moves, thereby ensures that electricity consumption user produces normally.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Wherein: 1, cable channel cover plate, 2, nosing, 3, ventilation threeway, 4, rainhat, 5, penetration pipe, 6, cable, 7, terminal box.
Embodiment
As shown in Figure 1, the present invention is the improvement in prior art, and terminal box is installed on to cable trough side, and terminal box center and the about 1m of cable channel cover plate central horizontal distance are in the scope of 3m, and cable trough seals by PVC penetration pipe to the cable between casing.Cable goes out trench cover perforation, and perforation upside has and is greater than the nosing that 5cm is high, is convenient to overlap PVC threeway.PVC ventilation threeway end opening can be placed on cover plate upside nosing, and threeway Opening Ventilation suitable for reading is also installed rainhat, and the 3rd mouthful of threeway be in order to wear cable, and is connected with terminal box bottom by penetration pipe.Like this, in ditch, the moisture overwhelming majority drains by threeway is suitable for reading, can be stifled by fire prevention mudding in the space in lower box cable and pvc pipe chamber.Cable trough moisture and terminal box are effectively isolated.
Claims (1)
1. outdoor wiring terminal box means of defence, it is characterized in that: terminal box center and cable channel cover plate central horizontal distance are at 1m-3m, there is cable punching hole at cable channel cover plate center, perforation upside has the nosing that exceeds horizontal plane 5cm-10cm, above nosing, be enclosed within ventilation threeway end opening, ventilation threeway Opening Ventilation suitable for reading is also installed rainhat, and the 3rd mouthful of ventilation threeway side is in order to outgoing cable, and cable is connected with terminal box bottom by penetration pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236631.3A CN104037623B (en) | 2014-05-30 | 2014-05-30 | Outdoor wiring terminal box means of defence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410236631.3A CN104037623B (en) | 2014-05-30 | 2014-05-30 | Outdoor wiring terminal box means of defence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104037623A true CN104037623A (en) | 2014-09-10 |
| CN104037623B CN104037623B (en) | 2016-01-27 |
Family
ID=51468296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410236631.3A Active CN104037623B (en) | 2014-05-30 | 2014-05-30 | Outdoor wiring terminal box means of defence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104037623B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5349790A (en) * | 1992-10-13 | 1994-09-27 | Lexsuco Canada Limited | Roof pipe entry hatch |
| CN2728053Y (en) * | 2004-09-29 | 2005-09-21 | 天津港第四港埠公司 | Tide-proof dust-proof switch case |
| CN202333660U (en) * | 2011-11-16 | 2012-07-11 | 镇江市江南矿山机电设备有限公司 | Junction device of explosion-proof electric magnetic iron remover |
| CN202363757U (en) * | 2011-12-06 | 2012-08-01 | 广东先达电业股份有限公司 | Outdoor terminal box of substation with moisture-proof function |
| JP2012231634A (en) * | 2011-04-27 | 2012-11-22 | Toshiba Corp | Cable installation facility and cable installation method using the same |
| CN202957559U (en) * | 2012-12-17 | 2013-05-29 | 辽宁省电力有限公司朝阳供电公司 | Self-dehumidification cable trench |
-
2014
- 2014-05-30 CN CN201410236631.3A patent/CN104037623B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5349790A (en) * | 1992-10-13 | 1994-09-27 | Lexsuco Canada Limited | Roof pipe entry hatch |
| CN2728053Y (en) * | 2004-09-29 | 2005-09-21 | 天津港第四港埠公司 | Tide-proof dust-proof switch case |
| JP2012231634A (en) * | 2011-04-27 | 2012-11-22 | Toshiba Corp | Cable installation facility and cable installation method using the same |
| CN202333660U (en) * | 2011-11-16 | 2012-07-11 | 镇江市江南矿山机电设备有限公司 | Junction device of explosion-proof electric magnetic iron remover |
| CN202363757U (en) * | 2011-12-06 | 2012-08-01 | 广东先达电业股份有限公司 | Outdoor terminal box of substation with moisture-proof function |
| CN202957559U (en) * | 2012-12-17 | 2013-05-29 | 辽宁省电力有限公司朝阳供电公司 | Self-dehumidification cable trench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104037623B (en) | 2016-01-27 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |