EP3949047A1 - Messgerätezugriff an mobiler box - Google Patents
Messgerätezugriff an mobiler boxInfo
- Publication number
- EP3949047A1 EP3949047A1 EP20712603.8A EP20712603A EP3949047A1 EP 3949047 A1 EP3949047 A1 EP 3949047A1 EP 20712603 A EP20712603 A EP 20712603A EP 3949047 A1 EP3949047 A1 EP 3949047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- conductor
- power
- wall
- measuring device
- 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
Links
- 239000004020 conductor Substances 0.000 claims abstract description 110
- 230000007935 neutral effect Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241000208199 Buxus sempervirens Species 0.000 description 1
- 206010014357 Electric shock Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/081—Bases, casings or covers
- H02G3/083—Inlets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/18—Distribution boxes; Connection or junction boxes providing line outlets
Definitions
- the present invention relates to a housing with at least one electrical conductor routed through the interior of the housing between a first connection as a power inlet and a second connection as a power outlet, in particular a mobile power distributor housing.
- the invention also relates to a system of several such housings electrically connected in a cascade.
- Sub-distributors can be connected in different cascades.
- Such mobile power distributors usually have an extremely robust housing made of a stable wall material, at least one power supply, often in the form of a CEE cable, sockets on at least one outside of the housing,
- CEE sockets that are connected to the at least one power supply via a distributor inside the housing, for example a busbar or wiring, optionally rubberized corners or edges,
- Stacking fittings, etc. so that they can be used efficiently and long-term even under high mechanical loads.
- Mobile power distributors are available, for example, in the form of so-called flight cases, i.e. boxes that can be opened and are usually set up on edge, with the power connections on the inside, of stackable boxes that can be stacked on top of each other to form a tower, in 19-inch design, in order to Inch cabinets can be assembled, or in the form of suitcases or as stand-alone boxes.
- Fault currents of various connected loads can add up and, in particular at higher-level distributors, can be so high that the fault current Threshold values in which a residual current device, in particular a residual current circuit breaker, trips, sometimes clearly exceeds.
- a residual current device in particular a residual current circuit breaker
- Residual current devices are limited at each of the power distributors used. Securing every power distributor is, however, extremely complex and expensive.
- the present invention is therefore based on the object of providing a distributor box which enables fault currents to be handled more efficiently.
- This object is achieved in a distribution box of the aforementioned type according to claim 1 by a conductor guide on or in a wall of the housing, through which the conductor is guided in such a way that only exactly one conductor can be grasped by a measuring device that is accessed from outside the housing .
- a conductor guide in the sense of the present invention is a means to guide a conductor into an area for access to the measuring device from outside the housing and out again from there and / or a conductor through the area for access to the measuring device from outside the housing to lead through.
- a conductor passed through the housing can be accessed from the outside with a measuring device, it is possible to determine on the housing how high the current is passed through the conductor. This can be measured
- fault currents occur, so that targeted troubleshooting can be carried out with comparatively little effort and a result can be quickly achieved. If the fault current that arises at a power consumption is based on a
- the fault can then be rectified on the consumer or the
- Another very important advantage of the present invention is that the currents flowing through a conductor can be measured during operation without the housing having to be opened.
- a measuring point on the outside of the housing significantly improves the accessibility of the measuring point. As a result, the risk of electric shock for the person measuring is reduced to a minimum.
- At least one of the conductors that can be gripped around with a measuring device from outside the housing is a PE conductor or a PEN conductor. Since fault currents are discharged via a PE conductor or a PEN conductor, the easiest way to determine a fault current and its level is to measure the current on these conductors. The conductor must necessarily be separated from other conductors of a power line in the area of access for the measuring device.
- At least one of the conductors that can be grasped from outside the housing with a measuring device is a phase conductor and / or a neutral conductor.
- Power distribution network can be determined at the measuring point.
- two, three or more conductors that can be grasped from outside the housing with a measuring device are provided in order, for example, to obtain a plurality of measured values on the quality of the power distribution network and / or the level of a current at the power supply and / or - departure of
- a preferred one is in the area in which the conductor should be able to be grasped from the outside with a measuring device
- Embodiment of the invention provides a cable duct through which the individual conductor is passed separately from other conductors.
- the housing can have a protruding wall in which at least one opening is provided, the conductor being guided within the wall between the edge of the wall and the opening so that a current clamp can be used can engage from the edge of the wall into the opening and encompass the individual conductor.
- the shape of the opening is not important. Circular or oval openings are preferred insofar as a measuring tool cannot tilt in them.
- An integrated channel is preferably provided in the wall as a conductor guide. If several
- Openings in the protruding wall are arranged next to one another, a conductor is guided around an opening in the form of a loop, so that only exactly one conductor runs between the edge and the opening.
- the housing can have at least one completely encompassing handle, which is designed as a conductor guide with a channel running through it or through which a cable duct is passed as a conductor guide so that a conductor can be passed through the handle and used as a measuring point .
- the housing structure can be simplified in this way.
- At least one of the walls has a depression or a recess, and that at least one conductor is guided through the clear area of the depression or the recess. If it is sufficiently insulated, the conductor can run freely through the clear area of the depression or recess without additional sheathing.
- the openings in the housing from which the conductor enters the clear area and exits from the clear area back into the housing are the conductor guide.
- a cable duct can also be provided as an (additional) conductor guide.
- One or more conductors which are arranged at a distance from one another and which can be individually accessed from the outside with a measuring device, can be passed through such a depression or recess.
- Such a recess can be provided in a central area of a housing wall, but also, for example, on the edge of a wall which, if necessary, can also protrude beyond the housing body.
- the depression or recess can also be open towards the edge of the housing, especially when the conductor or conductors to be accessed run parallel to the edge.
- the housing is characterized by a trough in the housing wall with two openings through which a conductor is led out of the housing and back into the housing, a section of the conductor being pulled out of the housing as a loop and then again can be pressed in, the openings here as a conductor guide.
- a handle is preferably attached to the loop of the conductor, which is adapted to the shape of the trough and serves as a handle for the conductor. If the conductor is largely pushed into the housing, the handle can cover the recess so that the conductor is protected against damage from the outside.
- an identifier or label for identifying the type of conductor is provided.
- the invention is particularly suitable for mobile housings.
- the invention can also be useful for permanently installed current-carrying housings, for example for wall distributors.
- the housing according to the invention can have exactly one power inlet and exactly one power outlet.
- Such a housing can then, for example, be connected upstream of a power distributor or connected to a power outlet of a power distributor, so that measurements of currents through individual conductors at the power inlet or outlet of the power distributor can be carried out via the housing designed in this way.
- the housing according to the invention is particularly suitable for mobile power distributors with at least one power inlet and at least two power outlets, the power outlets, for example, as sockets, terminal outlets or
- Connectors can be formed that are electrically connected to the power supply.
- the power outlets can preferably be arranged on one side of the housing. The side with the
- Current outlets can be protruded from the walls of the housing adjoining them, wherein one or more openings or recesses can be provided in the part of one or more walls protruding from the side.
- the conductor or conductors which should be accessible from the outside for a measuring device, can then be guided between the opening or openings and the edge or edges of the protruding part of the walls or through the one or more recesses. If the current through a conductor of a current outlet of a power distributor is to be measurable, it makes sense that the externally accessible conductor is connected to the current outlet, that is to say electrically between a current distributor arranged in the housing and the current outlet.
- the externally accessible conductor can also be electrically located between the power supply and the power distribution located inside the housing, for example if it should be possible to determine how high the total fault current taken by the power distributor and introduced into the network is.
- housings according to the invention are electrically connected to one another in a cascade, this creates a stable power distribution system that can be set up in a particularly time-efficient and cost-effective manner.
- FIG. 1 shows an external view of a housing according to the invention for a power distributor in a first embodiment
- FIG. 2 is a sectional view through part of the housing shown in FIG. 1;
- FIG. 3 shows a simplified circuit diagram of a possible embodiment of a
- FIG. 4 shows an external view of a housing according to the invention in a second
- FIG. 5 shows an external view of a housing according to the invention in a third
- FIG. 1 shows a power distributor with a housing with a front wall 1, two side walls 2, 3, an upper wall 4 and a lower wall 5 and a rear wall (not shown).
- the front side 1 has several CEE sockets 6 as power outlets, which are electrically connected to a power inlet via a power distribution inside the housing.
- Walls 2, 3, the upper wall 4 and the lower wall 5 protrude forward beyond the front wall and thus offer lateral protection for the sockets 6.
- the lateral wall 2 protruding from the front there are five circular openings 7i arranged one above the other , 7 2 , 7 3 , 7 4 , 7 5 .
- a cable duct 8 is loop-like around each of the openings 7 guided around, so that, as shown in Figure 2, the cable duct 8 runs between the front edge 9 of the side wall 2 and the respective opening 7 (I.5) .
- a conductor 11 of a power line runs through the cable duct 8.
- the size of the openings and their distance from the front edge of the side wall is dimensioned so that one can easily reach into the opening 7 from the outside with a measuring device, for example a clamp meter or multimeter, and thus enclose the conductor 11 in order to carry out a current measurement.
- a measuring device for example a clamp meter or multimeter
- the side wall 2 has five openings 7 so that, as can be seen from the circuit diagram in FIG. 3, for each of the conductors of a three-phase line, namely a PE conductor, a neutral conductor and three phase conductors, each of which is routed around one of the openings 6 there is an external access option for a measuring device.
- each opening has a colored identification ring 12i, 12 2 , 12 3 , 12 4 , 12 5 , with each identification ring 12 having a coding corresponding to the type of conductor routed around the opening having.
- FIG. 3 shows possible combinations for tapping currents from individual conductors via externally accessible measuring points.
- each conductor is individually through an externally accessible measuring area 22, 23, 24, 25 on the power access side, i.e. in front of a power distribution 21 arranged in the power distributor housing , 26, such as an opening, recess or the clear area of a recess in a housing wall, so that the current flowing therein can be measured on each conductor.
- a first power outlet (outlet 1) and a second power outlet (outlet 2) are provided in the area of the power distribution 21, for example in the form of a busbar.
- the first current outlet also has three phase conductors, one
- Neutral conductor and a PE conductor which are also each led through an externally accessible measuring area 27, 28, 29, 31, 32.
- the second current outlet only has a phase conductor as well as a neutral conductor and a PE conductor, which are each led through the externally accessible measuring areas 33, 34, 35. Even if all conductors of an outlet or all current-access-side conductors are each led through an externally accessible measuring area, it is in principle sufficient if only one conductor of the power line for current measurement, for example the PE conductor, is externally accessible for current measurement is. Another alternative of a measuring range is shown in FIG. In the
- a rectangular recess 43 is let into the side wall 41 of a power distribution housing 42 according to the invention.
- Five cable ducts 44, 45, 46, 47, 48, which can be gripped from the outside, are guided through the clear area of the recess 43, parallel to and spaced apart from one another.
- One of the five conductors of a three-phase line runs through each of the cable ducts.
- FIG. 5 it is shown how a conductor 51 is passed through a handle 52 of a power distributor housing 53 designed as a cable duct.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Distribution Board (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19165250.2A EP3716426A1 (de) | 2019-03-26 | 2019-03-26 | Messgerätezugriff an mobiler box |
PCT/EP2020/058445 WO2020193670A1 (de) | 2019-03-26 | 2020-03-25 | Messgerätezugriff an mobiler box |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3949047A1 true EP3949047A1 (de) | 2022-02-09 |
Family
ID=65991643
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19165250.2A Pending EP3716426A1 (de) | 2019-03-26 | 2019-03-26 | Messgerätezugriff an mobiler box |
EP20712603.8A Pending EP3949047A1 (de) | 2019-03-26 | 2020-03-25 | Messgerätezugriff an mobiler box |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19165250.2A Pending EP3716426A1 (de) | 2019-03-26 | 2019-03-26 | Messgerätezugriff an mobiler box |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3716426A1 (de) |
WO (1) | WO2020193670A1 (de) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005045564A1 (de) * | 2005-08-26 | 2007-03-01 | Thermec | Adapter, Netzsteckdose, Gehäuse und Verfahren zur Anwendung des Adapters |
CN203774709U (zh) * | 2013-12-13 | 2014-08-13 | 施耐德电气It公司 | 电源分配单元和连接模块 |
-
2019
- 2019-03-26 EP EP19165250.2A patent/EP3716426A1/de active Pending
-
2020
- 2020-03-25 EP EP20712603.8A patent/EP3949047A1/de active Pending
- 2020-03-25 WO PCT/EP2020/058445 patent/WO2020193670A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020193670A1 (de) | 2020-10-01 |
EP3716426A1 (de) | 2020-09-30 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20211026 |
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AK | Designated contracting states |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
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17Q | First examination report despatched |
Effective date: 20240205 |