CN201266789Y - Indoor wiring switching equipment - Google Patents

Abstract

The utility model relates to an indoor wiring switchgear. The switchgear is provided with an insulating material shell. The insulating shell includes a front surface and a fixed surface. These surfaces are connected with an input narrow surface and an output narrow surface by means of two wide surfaces. and with a current path extending between the input and the output, which current path can be switched on or off via at least one main contact, wherein the main contact can be operated by means of at least one switch operable via a switch handle Mechanisms are permanently opened or closed. The switchgear is characterized in that a connecting busbar can be arranged inside the housing close to the fixed surface and roughly parallel to the fixed surface, and the connected busbar can be connected with the input narrow surface in the installed state. The input end is connected, in addition, there is no mechanical and electrical connection between the phase connection bus bar and other elements and components in the housing, and a clamping contact is provided on the free end of the phase connection bus bar, the clamping contact Protrudes beyond the housing on the fixing face for clamping to the current bar of the mounting switchboard.

Description

Indoor Wiring Switchgear

technical field

The utility model relates to an indoor wiring switchgear, which is provided with an insulating material shell, and the shell includes a front surface and a fixed surface, and these surfaces are connected with an input narrow surface and an output narrow surface by means of two wide surfaces; A current path extending between the output terminal and the output terminal, the current path can be connected or disconnected by at least one main contact, wherein the main contact can be permanently disconnected by means of at least one switching mechanism operable by the switch handle or closed.

Background technique

Such an indoor wiring switchgear is disclosed by DE 195 26 592 C2 or DE 10 2004 019 175 A1. They are designed and used, for example, as so-called bus protection switches. For example, the bus protection switch is installed in the instrument panel of the installation equipment in the electrical room or in the installation switchboard. These are usually three-phase installation switchboards in which there are three parallel phase busbars, also called busbars or current bars, arranged one above the other in a fixed plane, which The three phase conductors for the power supply system are now usually designated L1 , L2 , L3 in a standardized manner, and a phase busbar for the neutral conductor is additionally provided. Here, installation can be carried out in such a way that the house wiring switchgear is fixed mechanically on a standard-type support rail by means of a quick-fix device arranged on the house wiring switchgear housing. The electrical connection of the house-wiring switchgear to the phase busbars is established by connecting wires or current bars with corresponding lugs inserted into the connection terminals of the house-wiring switchgear. The phase busbars themselves are supplied with power via feed terminals which require additional space in the installation switchboard.

DE 103 35 496 A1 shows the installation of indoor wiring switchgear in a three-phase installation switchboard via a receiving adapter (Aufnahmeadapter), wherein the adapter is directly mechanically and conductively fitted to the current bar via the adapter terminal, via the adapter The current bar in the adapter forms an electrical connection between the adapter terminal and the terminal of the indoor wiring switchgear clamped on the adapter. The indoor wiring switchgear itself is not suitable for direct assembly

Utility model content

The purpose of this utility model is to further develop this indoor wiring switchgear, making it easy to install and connect mechanically and electrically, and to adapt to different installation situations simply and conveniently in application.

To achieve this object, the present invention provides such an indoor wiring switchgear with the features stated in the characterizing part of claim 1 .

According to the utility model, a phase connection bus bar can be arranged inside the housing close to the fixed surface and roughly parallel to the fixed surface. The phase connection bus bar can be connected to the terminal at a position close to the input narrow surface in the installed state. In addition, there is no electrical or mechanical connection between the phase connection busbar and other elements and assemblies within the housing. Clamping contacts are provided on the free ends of the connecting busbars, which protrude beyond the housing on the fastening surface for clamping on a current bar in an installation switchboard. A preferred structure of the indoor wiring switchgear is that the housing has a stop device, by means of which the indoor wiring switchgear can be fixed on the current bar on which the switchboard is installed.

The advantage of the utility model indoor wiring switchgear is that it can be mechanically fixed on the current bar of the installation switchboard, and at the same time can be connected directly and without the intermediate connection of the adapter, through the phase connection provided inside the housing. The busbar is electrically connected to the current bar of the mounting switchboard with the clamping contacts located on the phase connecting busbar.

Another preferred structure of the indoor wiring switchgear of the utility model is that the length of the connected busbar is variable, wherein the length of the connected busbar is relative to the current bar to be connected in the installed state of the indoor wiring switchgear Corresponding to the position of the terminal block. The indoor wiring switchgear of the utility model can be converted into a switchgear for directly assembling on the L1 phase line, or the L2 phase line, or the L3 phase line by simply changing the used phase connection busbar. These phase lines L1, L2, L3 are located on the fixed surface where the switchboard is installed, and are at a certain distance from each other. For example, if the indoor wiring switchgear is to be connected to the phase line L1, the length of the connecting busbar is such that the contact clips emerge from the corresponding housing opening corresponding to the phase line L1 in the installed state of the device.

The length of the connecting busbars is the only variable in the inventive indoor wiring switchgear in terms of connection schemes for suitable current bars as opposed to installing in switchboards. Regardless of whether the indoor wiring switchgear is connected to the L1 phase line, the L2 phase line or the L3 phase line, all other elements or components inside the housing and their relative positions will not be affected.

This great advantage is obtained through the following design scheme of the indoor wiring switchgear of the present invention: the phase connection bus bar can only be connected to the input terminal near the narrow wiring connection, in addition, the phase connection bus bar is connected to the input terminal. The other elements in the device extend parallel to the inner fixing surface of the device independently and without mechanical and electrical connection thereto. Therefore, the only point of connection to the components in the house wiring switchgear is the input, which can be connected not only to the external connection conductors, but also to the internal phase connection busbars. In particular, the internal phase connection busbars do not provide a connection point on the current path between the two terminals of the house wiring switchgear. Connection points for external connecting wires and internally connected bus bars are removed and grouped at the input.

An embodiment of the house wiring switchgear according to the invention is particularly advantageous for installation into an installation switchboard with at least three current bars, in which embodiment the housing of insulating material comprises at least three openings on the fixing surface, these Openings for the passage of contact clips of phase connection busbars which may be provided in the housing, wherein these openings correspond to the positions of the three current bars in a three-phase installation switchboard when the indoor wiring switchgear is installed in the installation switchboard. Correspondingly, and not required, the opening for the passage of the contact clip is closed with a detachable cover. Thus, the house wiring switchgear is ready from the housing for connection to each of the three phase bus bars.

Therefore, the indoor wiring switchgear according to the invention requires only one type of housing, irrespective of which of the three current bars they are to be connected to within the installation switchboard. All three housing openings corresponding to the respective current bars in the installation position of the device already exist, which openings are closed by means of removable covers at the start of the production of the house wiring switchgear. When it is determined which of the three current bars the device needs to be connected to, the housing opening corresponding to the current bar can be opened by removing, for example, the corresponding cover plate, and using a suitable length connected to the busbar. If the indoor wiring switchgear is to be connected to other current bars in the future, close the original opening by reinstalling the cover plate, open the housing opening corresponding to the other current bars, remove the originally used phase connection busbar and use A phase connection busbar whose length corresponds to the position of the other current bars.

In a further advantageous embodiment, if the configurable connecting busbars are removed and the housing is adapted accordingly to be fastened by means of a busbar adapter to a current bar on which a switchboard is installed or by means of a quick-fastening device to a standard support rail On the other hand, the switchgear for indoor wiring according to the invention can also be designed for fixing on the current bar of the installation switchboard by means of busbar adapters, or on standard type support rails by means of quick fixing devices. The indoor wiring switchgear of the present utility model can be made into an ordinary indoor wiring switchgear simply by dismantling the connecting busbar, and the ordinary indoor wiring switchgear can be assembled to On the busbar of the switchboard. Therefore, the indoor wiring switchgear of the present invention can be installed very flexibly. Without changing its shell and internal structure, it can adapt to whether it is installed directly or by means of an adapter on the busbar of the distribution panel. It is only necessary to choose whether to install the connected busbar on the inner side of the housing on the fixed surface.

It is also possible to supply power to the indoor wiring switchgear in two ways. If the current bar to which the house wiring switchgear is clamped is live, then the power is supplied via the clamping contacts and the connecting busbars. If there is no current flow to the busbar, the power supply is supplied via the connection lead connected to the input, which is screwed there, for example, in a known manner.

This way of supplying power to the indoor wiring switchgear through the connecting wire presents another advantage of the present invention. Furthermore, by connecting the busbars and clamping the contacts, current can be supplied to the current bars in which the switchboard is installed. In this way, the indoor wiring switchgear achieves a dual function. The device serves as a bus protection switch for the current path formed thereafter and at the same time serves as a feed terminal for the busbar to which the device is fastened, and thus enables the supply of other devices connected to the same current bar. Therefore, a separate feed terminal is not necessary and saves space in the installation switchboard.

If the house wiring switchgear is used in a photovoltaic installation to provide a fuse for the feed from the inverter converter of the photovoltaic installation to the supply network, the integrated phase connection busbars can also be used very advantageously. The current generated by the photoelectric module and converted to AC voltage in the inverter then flows into the indoor wiring switchgear of the present invention through the output end and leaves the switchgear at the input end. At this input, the current path continues via the connecting conductors, or the current is fed into the current bar system via an integrated phase connection busbar and is distributed from there on, all without the need for further adjustments to the house wiring switchgear change or remodel.

Further advantageous refinements and developments and further advantages of the invention can be derived from the subclaims.

The utility model and other advantageous designs and improvements of the utility model will be further described and explained in detail below with the aid of the accompanying drawings describing three embodiments of the utility model.

Description of drawings

Figure 1 shows the utility model indoor wiring switchgear in the form of a selective bus protection switch for direct connection to the phase busbar L1;

Fig. 2 shows the indoor wiring switchgear of the present invention in the form of a selective bus protection switch for direct connection to the phase busbar L2;

FIG. 3 shows a switchgear for indoor wiring according to the invention in the form of a selective bus protection switch for fitting to standard type support rail;

Fig. 4 is a detailed internal view of the utility model indoor wiring switchgear shown in Fig. 1;

Fig. 5 is a view of the fixed surface of the indoor wiring switchgear of the present invention.

In these figures, identical or functionally identical elements or components are marked with the same symbols.

Explanation of reference signs:

1 Current limiting resistor

3 Selective thermal bimetallic

7 main heat bimetal

10 Selective protection switch, indoor wiring switchgear

12 fixed surface

14 front

15 rear front

16 front narrow side

17 rear narrow side

18 Shell

20 output

21 input

22 main contacts

23 Collision armature system

24 switch lock

25 Separate contacts

26 handles

78 connection points

80 line of action

81 line of action

82 line of action

83 line of action

90 phase busbars, busbars, current bars

90b Phase busbars, busbars, current bars

90c phase busbars, busbars, current bars

91 clamping contact

92 Current bars, phase connection busbars

93 flexible stranded wire

121 phase connection opening

121b Phase connection opening

121c Phase connection opening

122 cover

122b Cover

125 protrusions

126 protrusions

126 protrusions

128 protrusions

1000 cabinets

Detailed ways

First, refer to FIG. 1 . This figure shows the circuit diagram of the indoor wiring switchgear of the present invention fitted into the outer contour of the housing.

A main current path runs between the input 21 and the output 20 , which also flows through the main thermal bimetal 7 , the main contact 22 and the crash armature system 23 . A secondary current path runs in parallel to the series circuit formed by the main thermal bimetal 7 and the main contact 22 . The secondary current path includes a current limiting resistor 1 , a selective thermal bimetal 3 and a split contact 25 .

The main contact 22 is designed as a single break point, the main contact includes a movable contact rod 221 and a fixed contact 222, the contact rod 221 has a movable contact, and the fixed contact 222 has a fixed contact. The movable contact rod 221 is supported on a shaft arranged in a stationary manner in the housing.

In addition, the indoor wiring switchgear also includes a mechanical switch lock 24 . On the one hand, the switch lock 24 forms a mechanical effective connection with the main thermal bimetal 7 and the selective thermal bimetal 3 along the action lines 81, 80; Point 25 and main contact 22 form a mechanically effective connection.

According to the circuit diagram shown in Figure 1, the function of the indoor wiring switchgear of the present invention is that when a short-circuit current occurs in the main current path, the collision armature system 23 moves the movable contact rod 221 from the fixed The contacts move apart, breaking the main current path at the main contact 22 . During the switching operation, a switching arc is generated at the main contacts 22 , which is fed to the arc suppressor assigned to the main contact 22 and suppressed there.

When the main contact 22 is opened, the current flow is switched to the secondary current path. The short-circuit current now flows via the limiting resistor 1, the selective thermal bimetal 3 and the separating contact 25 to the connection point 78 where the primary and secondary current paths intersect. After a certain delay time (in addition, this delay time can be predetermined by selecting the resistance value of the current limiting resistor), due to the limited short-circuit current flowing in the secondary current path, the selective thermal bimetal 3 along the line of action 80 acts on the switch lock 24 so that it permanently opens the disconnect contact 25 along the line of action 82 , 84 and permanently opens the main contact 22 along the line of action 86 . During this switching operation, an arc is likewise generated, which is fed to a further arc suppressor assigned to the separating contact 25 and suppressed there. Now, both the main contact and the separating contact are open, and the current flow through the house wiring switchgear is thus completely cut off. At this time, the switch lock 24 can be manually operated through the handle 26 to realize reclosing.

A phase connecting busbar 92 is connected to the inlet port 21 , also referred to as the input port, through a flexible copper stranded wire 93 . There is a clamping contact piece 91 on the free end of the phase connection bus bar 92. When the indoor wiring switchgear needs to be installed, the phase connection bus bar 92 can be clamped in the installation distribution box through the clamp contact piece. On the phase bus bar 90, the phase bus bar 90 is also referred to as a bus bar. Therefore, the indoor wiring switchgear of the present invention can be directly fixed to the phase bus bar 90 of the installed switchboard through the phase connection bus bar 92 mechanically and conductively without the intermediate connection through the adapter and without the need for feeder terminals. called a busbar) and establish an electrical connection.

The indoor wiring switchgear 10 has an insulating material housing 18 with a front face 14 , a rear face 15 , a fixing face 12 and front and rear narrow faces 16 , 17 . The front narrow face 16 connects the front face 14 with the rear face 15 , and the rear narrow face 17 connects the rear face 15 with the fixed face 12 . Thus, the housing 18 is substantially in the shape of an inverted T, wherein the T-shaped longitudinal beam is defined by the front narrow face 16 and the front face 14, the switching mechanism 24, the separating contact 25 and the selective bimetal 3 set within the stringer area. The main heating bimetal 7, the main contact 22, the collision armature system 23, the arc suppression device (not shown in the figure) and the current limiting resistor 1 are arranged on the T-shaped housing, which is limited by the rear narrow surface, the rear front surface and the fixed surface in the beam.

On the fixed surface 12 of the indoor wiring switchgear, three phase connection openings 121, 121b and 121c are opened. These phase connection openings 121, 121b and 121c are arranged such that they are connected to the three current bars or busbars 90, 90b and 90c (also referred to as L1, The positions of L2 and L3) correspond. Inside the housing 18 , the connecting busbar 92 runs parallel to the fastening surface 12 . The size and position of the phase connection opening 121c correspond to the clamping contact 91 provided on the free end of the phase connection busbar 92, so that the clamping contact 91 can pass through the phase connection opening 121c and connect with the busbar 90, L1 work together clampingly. The clamping contact 91 is designed as a resilient clamping contact comprising two opposing spring clamps. The other two connection openings 121, 121b are covered by cover plates 122, 122b in order to prevent dirt from entering the device at these points.

Therefore, the indoor wiring switchgear shown in FIG. 1 is intended to be connected to the outer busbar among the three busbars on which the switchboard is installed. When a device variant on L2 is required for connecting the house wiring switchgear to the middle busbar of the three busbars, it is necessary to replace the phase connection bus with another shorter phase connection bus The row 92 , the clamping contact of the shorter connecting busbar, protrudes beyond the fastening surface 12 at the central connecting opening 121 b in the mounted state. In this case, the other two connection openings 121, 121c are covered by corresponding cover plates. FIG. 2 shows this configuration, and in this figure, moreover, the internally connected elements of the switchgear are represented schematically and generally by a box 1000 .

On the fixing surface 12 between the connecting openings there are protrusions 125 , 126 , 127 and 128 . These protrusions can be used to mechanically support the housing on other busbars that do not need to be electrically connected. In particular, the upper and lower protrusions 125 , 128 can be replaced by a locking device, such as a locking hook, by means of which the switching device can be fastened to the busbar on which the switchboard is installed. For example, DE10335496A1, especially FIG. 8 of this document, discloses such a stop device, and the related content disclosed here is included.

The indoor wiring switchgear of the utility model can also establish connections with different bus bars in the following way without making other changes to the position of the functional components inside the device: simply use a phase-connected bus bar of appropriate length and open The corresponding phase connection openings, while the other phase connection openings are covered with cover plates. There is no need to resort to other connecting devices for connecting the indoor wiring switchgear of the present invention to the busbar. A high degree of flexibility is thus achieved in the modular internal structure of the switchgear.

Of course, in the indoor wiring switchgear of the present invention, the input wires can also be connected to the input end 21 in a known manner, such as screwed with a screw terminal. This connection scheme can be considered when the indoor wiring switchgear of the present invention is installed in an installation place where there is no phase bus bar or bus bar, or the bus bar is not loaded with current through the bus bar terminal.

Finally, the indoor wiring switchgear of the present invention also opens up an application in which the current flows through the The wire on the input terminal 21 is delivered to the main current path, and at the same time, it supplies power to a current bar on which the switchgear is fixed through the phase connection busbar 92. In addition to its function, it also performs the function of the phase connection terminal clamped to the current bar.

If three switchgears of the present invention are arranged next to each other and installed in an installation switchboard or instrument panel with a three-phase busbar system, each of the three switchgears shall have a The phase connection busbar on the busbar.

Due to two kinds of electrical connection, or by means of connecting wires and through the electrical connection of the input terminal 21, or by means of the busbar installed in the switchboard and through the electrical connection of the phase-connected busbar 92, the utility model indoor wiring switchgear opens up a wide range of possibilities. The application diversification without the need to change the switchgear for different connection variants.

The selective bus protection switch is modified in such a way that it can be used simultaneously to supply power to the busbar system or to draw power from the busbar system.

In a typical installation, the feeder conductor is led from the service line fuse and connected to the terminal 21 of the switchgear 10 . The indoor wiring switchgear provides a power supply voltage for the bus bar 90 through the internal phase connection bus bar 92 . A total power supply of 125A is possible. There is no need to provide separate busbar terminals for supplying the busbar with a supply voltage.

However, it is also possible, in a known manner, to supply the busbar 90 via the busbar terminals, and to supply other additional components not connected to the busbar via connecting wires connected to the terminals of the house wiring switchgear 10. power supply for the device. Therefore, there is no need to provide additional busbar terminals for powering other devices on the busbar.

The space thus saved in the customer entry box can be used to install other functional modules, for example, an overvoltage arrester.

For devices that generate electricity through solar cells (also known as photovoltaic elements or photovoltaic devices), direct current is generated in the photovoltaic element, which is converted to alternating current by an inverter. The alternating current thus generated is then fed into the public grid via an electricity meter. In order to ensure the safety of the grid power supply, the utility model indoor wiring switchgear as shown in Fig. 1 and Fig. 2 can also be used. In this application, the power supply takes place at the output 20 and the current path leaves the switching device at the input 21 . The electricity is then fed either further into the public grid via connecting lines plugged into the input 21 , or supplied via the connecting busbar 92 to a busbar system and from there fed into the public grid.

According to the indoor wiring switchgear shown in Figure 1 and Figure 2, from the perspective of the shell structure, it is suitable to be directly installed on the busbar of the wiring system. However, if it is necessary to mechanically fix the indoor wiring switchgear of the present invention on a standard support rail, such as a hat-shaped support rail, it is necessary to set a corresponding fast fixing device on the fixing surface of the switchgear, so as to Fix the switchgear to a standard type support rail. By installing the internal components and components in the housing as shown in Figure 3, the utility model indoor wiring switchgear shown in Figure 1 and Figure 2 can be simply changed into one suitable for installation on standard support rails switchgear. Among them, the internal structure of the indoor wiring switchgear, the position and relative arrangement of all internal components and components have not changed.

The difference from the embodiment shown in FIGS. 1 and 2 is that a clamping device for a standard type of support rail is formed on the fastening surface in the form of a recess with locking lugs 902, which The clamping device is used for locking interaction with the standard support rail. The connecting busbar 92 is no longer required, the cavity for receiving it on the inner side of the fastening surface 12 remains empty. The electrical connection of the switching device is achieved by connecting connecting lines to the input 21 . An elastic fast fixing device can also be additionally arranged on the groove 900 . Such quick fixing devices are known in principle, for example from DE 10 2004 019173 A1.

Fig. 4 shows an implementation form, as a detailed internal view of a specific structural design of the indoor wiring switchgear of the present invention shown in Fig. 1, and Fig. 5 shows the fixed surface of the indoor wiring switchgear of the present invention in Fig. 4 view. The reference numbers therein refer to components and assemblies already mentioned in the description of FIGS. 1 and 2 .

Claims (6)

1. the house wiring switchgear has an isolating material housing, and this housing comprises front and stationary plane, and these faces link to each other with an input leptoprosopy and an output leptoprosopy by two wide; And have a current path that extends between input and the output, this current path can be switched on or switched off by a main contacts at least, wherein, this main contacts can be disconnected by the switching mechanism of switch knob operation or closure enduringly by one at least, it is characterized in that: in described enclosure interior near the local of described stationary plane and be roughly parallel to this stationary plane ground the bus-bar that is connected can be set, this be connected bus-bar under installment state near the position of described input leptoprosopy, can link to each other with input, in addition, do not have machinery between other element of this be connected bus-bar and enclosure interior and the assembly and be electrically connected, and the free end of this bus-bar that is connected is provided with the clamping contact, this clamping contact protrudes in housing on described stationary plane, be used to be clamped to the current bar that distribution board is installed.

2. house wiring switchgear according to claim 1 is characterized in that: described housing has retaining device, is used for described house wiring switchgear is fixed to the current bar that distribution board is installed.

3. house wiring switchgear according to claim 2, it is characterized in that: the different bus-bar that is connected of length can be set, wherein, the length of the described bus-bar that is connected is corresponding with the current bar that will connect position with respect to binding post under the installment state of house wiring switchgear.

4. house wiring switchgear according to claim 3, it is characterized in that: described housing comprises at least three openings on described stationary plane, be used for passing through for the contact clip that can be arranged on the bus-bar that is connected in the housing, wherein, when the house wiring switchgear is installed in the installation distribution board, described opening is corresponding with the position that three-phase is installed three current bar in the distribution board, and does not need to be used for for contacting the dismountable cover closure of opening that clip passes through.

5. house wiring switchgear according to claim 1, this switchgear is by being fixed to by the bus-bar adapter on the current bar that distribution board is installed, perhaps be fixed on the standard type supporting rail by rapid fixing, it is characterized in that, taking-up can be provided with when being connected bus-bar, described housing is fixed on the current bar that distribution board is installed by the bus-bar adapter, perhaps is fixed on the standard type supporting rail by rapid fixing.

6. instrument desk is characterized in that: comprise as described above each described house wiring switchgear in the claim.

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