SI26034A - Assembly of electric fuse with blade contacts and electric measuring device and electric fuse adapted for use in such assembly - Google Patents

Abstract

According to the invention, there is provided an assembly of a fuse electric fuse (1) with blade contacts (11 ', 11 ") and an electrical measuring device (2), said fuse (1) and said measuring device (2) via said blade contacts (11). ', 11 ") fuses (1) can be installed simultaneously in the same electrical circuit. The assembly comprises an electrical fuse (1) on which the blade contacts (11 ', 11 ") are arranged extraordinarily, namely a predetermined distance (E) from the central longitudinal plane of the fuse housing (10) (1) corresponding to half the thickness (B) of the secondary chamber (20 ") of the housing (20) of the electrical measuring device (2), except that at each selected total length (L) of the fuse (1) between the two extreme free ends of the blade contacts (11 ', 11" ) one of the two blade contacts (11 ', 11 ") for a predetermined length difference (F) longer than the rest of the blade contact (11', 11"). The electrical measuring device (2) comprises a uniformly designed housing (20) which is L-shaped in profile and comprises two parallelepiped chambers (20 ', 20 "at least approximately perpendicular to each other, the primary chamber (20') being provided with a through passage (21) for receiving the blade contact (11 ', 11 ") fuses (1) and all those electronic components of the measuring device (2) which have me d use in electrical contact with said blade contact (11 ', 11 ") of the fuse (1), the remaining sensibly perpendicular and internally at least substantially unhindered secondary chamber (20") of the housing (20) of the electrical measuring device (20) (2) is adapted to rest on the fuse housing (10) in the area between the covers (10 ', 10') with blade contacts (11 ', 11 "). The assembly designed in this way can be installed in the electrical circuit in the same way as the previously known fuses (1) with blade contacts (11 ', 11 ").

Description

Assembly of fuse electric fuse with blade contacts and electrical measuring devices and fuse electric fuse adapted for use in such assembly

The invention relates to an assembly of a fuse electric fuse with blade contacts and an electrical measuring device, as well as to a fuse electric fuse adapted for use in such an assembly. According to the International Patent Classification, such inventions in the field of electrical engineering, in particular basic electrical components, are classified in the field of protective components in which current flows through the melting element, and in case of electrical overload. Accordingly, the invention is classified in class H 01 H 85/165, taking into account the characteristics of the housing, and also in class H 01 H 85/153, taking into account the characteristics of the blade contacts.

In this case, the electric fuse with knife blades is in principle a fuse with an electrically non-conductive closed housing, in the interior of which a melting element is installed, which is equipped at each end of the housing with protruding blade contacts to which said fuse element is electrically connected. however, it is adapted for insertion into the appropriate plugs available in the respective electrical circuit, thus making the fuse fittable to the respective electrical circuit. Such fuses are known to experts in this field under the designation NV, and their characteristics and dimensions, especially in connection with the method of its installation, mainly for safety and interchangeability, are also described in the international standard IEC-60269-2. However, it is a fuse that is widely used for protection in low-voltage distribution networks, e.g. home connections and industrial switchgear against overloads due to overcurrent.

On the other hand, the term electrical measuring device means an additional device which, at the same time as said electric fuse, is built into the same electrical circuit and is adapted to measure a predetermined electrical quantity each time, e.g. to measure electricity consumption or powers.

The invention is based on the problem of how to design an assembly of fuse electric fuse with blade contacts and additional electrical measuring devices in such a way that the assembly of said fuse with still sufficient tripping capacity to protect existing circuits together with the corresponding measuring device will be available in dimensions of such fuses used so far and therefore in principle also in accordance with the mentioned standard built into the available electrical circuit in exactly the same way as hitherto known fuses with blade contacts, but the fuse itself will be easily replaced in case of disabling , when it is replaced and installed in the electrical circuit, it will still be possible to combine it without any problems or risks with a previously used and still usable measuring device.

An electrical fuse with an attached electric current measuring device is described in WO 2017/078525 A1, both of which are integrated in the fuse housing. Taking into account the dimensional limitations imposed by the available space for the fuse, a measuring device with all the necessary electrical components is also installed inside the electrically insulating housing, so there is significantly less space for the melting element and arc extinguishing agent. obdan. In such a case, in order to ensure the expected tripping capacity of the fuse, the thinning of the fuse wall must be taken into account, which is questionable in the case of a ceramic housing from the point of view of safety, or by increasing the dimensions of the fuse housing. in electrical cabinets adapted for the installation of conventional and standardized fuses. On the other hand, this also means that when a current overload occurs, when the melting element is interrupted and the fuse otherwise interrupts the electrical circuit passing through it, the fuse becomes non-functional and needs to be replaced with another in which the melting element is still continuous. When disposing of a non-functional fuse, the user also discards the measuring device unnecessarily, but as such it can still be fully functional.

Furthermore, EP 3 553 536 A1 proposes a solution in which, on the one hand, a fuse-blow fuse with blade contacts is provided and, on the other hand, a measuring device built into its own housing, equipped with a through passage whose outline corresponds to the contour of the blade blade contact. As a result, the housing of the measuring device can be mounted on one of the blade contacts. The shape and total length of the blade contacts correspond to the shape and length of the blade contacts for other standardized fuses of the prior art. The total length of the fuse housing and the measuring device housing EP 3 553 536 A1 also corresponds to the housing length of other fuse-type fuses, so that the fuse and gauge assembly can be installed in each circuit in exactly the same way as other fuse-type fuses. Due to the significant height or. the length of the housing of the measuring device, the fuse housing is significantly lower or shorter than standardized NV fuses with blade contact, so the melting element is significantly shorter, and there is less space inside and also on it the means of extinguishing the arc, so the tripping capacity of this fuse compared to the classic fuse with blade contacts in considerable custom truncated.

A similar solution is also described in DE 10 2018 213 522 Al, which is also a fuse with a melting element and blade contacts, in combination with a measuring device that is installed in its own housing. Also in this case, the housing of the measuring device is adjustable to one of the blade contacts, so that the separate housings of the fuse and the measuring device are aligned with each other in the longitudinal direction of the blade contacts. In this case, too, the total length of the fuse and measuring device housings corresponds to the length of the conventional fuse with blade contacts, of course the fuse housing is significant, at least about a third shorter than with a conventional fuse. As a result, the fuse element is significantly shorter with this type of fuse, which then significantly affects the response of the fuse element in case of overcurrent or short circuit, so in this case the tripping capacity of the fuse is significantly reduced compared to a conventional fuse.

The present invention relates to an assembly of a fuse electric fuse with blade contacts and an electrical measuring device, said fuse and said measuring device being simultaneously integrated in the same electrical circuit via said blade fuse contacts.

However, said fuse generally comprises a tubular housing made of electrically non-conductive material, which is closed with a cover at each of its open opposite ends, and one electrically conductive blade contact is available on each of said covers. The blade contacts are plane and coaxially aligned and equally oriented and protrude away from the said housing. Thanks to this type of design, the fuse can be installed with the help of blade contacts in suitable fork contacts, which are provided for this purpose in the electrical circuit provided for the installation of the fuse. At the same time, an electrically conductive and, under predetermined conditions, interruptible melting element is installed inside the fuse housing, which is electrically connected to each of said blade contacts and preferably surrounded by a predetermined amount of bulk refractory arc extinguishing material.

On the other hand, said electric measuring device generally comprises a housing made of electrically non-conductive material, in which the necessary electrical or electronic components are installed in each case for measuring and optionally for communication, said housing being equipped with a through passage adapted. to ensure the ductility of the housing on one of the blade contacts of the aforementioned fuse, so that after installing the electrical measuring device on each selected blade contact fuse and installing the fuse in the available electrical circuit via the blade blade contact, each electrical or electronic component inside said housing electrical measuring devices suitably connected to said electrical circuit passing through an electrical fuse. The housing of the electrical measuring device is secured against unintentional removal from the corresponding blade contact of the fuse by means of a suitable guard.

The common dimensions, namely the total length, width and depth of the two mentioned housings, as well as the size and position of the blade contacts, correspond to those of conventional fuses and thus enable the installation of such a fuse and fuse assembly in conventional and standardized fork contacts. electrical circuit.

According to the invention, it is proposed that the otherwise uniformly designed housing of the electrical measuring device in the profile is shaped like the letter L and comprises two at least approximately perpendicularly arranged parallelepiped chambers, namely the primary and secondary chambers. The primary chamber is equipped with a through passage for receiving the blade contact of the fuse and all those electronic components of the measuring device which are in electrical contact with said blade contact of the fuse during use. In the context of the L-shaped housing, the secondary chamber is arranged perpendicularly perpendicular to the primary chamber and is at least substantially unobstructedly connected to the interior. all other electrical or electronic components of the electrical measuring device that are not necessarily required during use to be arranged in direct contact with the blade contact of the fuse.

In the context of the present invention, it is further contemplated that in said fuse and measuring device assembly, the thickness transverse to the blade contact of the primary chamber of the electrical measuring device housing is selected to allow the installation of at least those electrical and electronic components of the measuring device. use in direct contact with the associated blade contact of the fuse, on the other hand also sufficiently stable attachment of the measuring device housing to each blade contact with adequate protection of the measuring device housing against accidental removal from the blade contact of the fuse by means of a suitable guard.

Furthermore, in the context of the present invention, it is also contemplated that the thickness of the secondary chamber is selected to receive and install all remaining electrical and electronic components of the electrical measuring device not included in the primary chamber, the electrical and electronic components of the electrical measuring device in both chambers of the housing, the measuring devices are at least electrically interconnected and form a functional whole.

At the same time, in the context of the present invention, it is also provided that in said fuse and electrical measuring device assembly the total length of the housings, which is the sum of the fuse housing length and said primary chamber thickness of the electric measuring device, corresponds to the length of a conventional fuse housing the devices are identical to each other and also correspond to the depth of the normal fuse, and the width of both housings, which is the sum of the thickness of the secondary chamber and the thickness of the fuse housing corresponds to the width of the normal fuse.

Furthermore, in the context of the present invention, it is provided that in said fuse and electrical measuring device assembly, the size and arrangement with the secondary chamber of the measuring device housing of parallel oriented blade contacts is adapted to the size and arrangement of blade contacts in conventional fuses. For this purpose, in order to receive the blade contact, the passage in the primary chamber of the measuring device housing is centrally arranged, and consequently the blade contacts on the fuse are arranged extraordinarily, namely chambers of the housing of an electrical measuring device. Accordingly, for each selected total fuse length between the two extreme free ends of the blade contacts, which is in principle the same as for other conventional fuses, one of the two blade contacts is a predetermined length difference longer than the rest of the blade contact.

According to the invention, it is further provided that in said assembly the width or thickness of the secondary chamber of the electrical measuring device housing intended to rest on the fuse housing in the area between the blade contact covers does not exceed one quarter of the total width of the primary chamber of the electric measuring device. In this context, according to the invention, the condition is met that the width or. the thickness of the secondary chamber of the electrical measuring device housing does not exceed one quarter of the sum of the said width of the secondary chamber of the electrical measuring device housing and the width of the fuse housing on which the blade contact is mounted.

According to the invention, it is also provided that in the case of said assembly the thickness of the primary chamber chamber of the electrical measuring device housing does not exceed a quarter of the total length of the secondary chamber, but does not exceed the sum of the primary chamber thickness of the electric measuring device fuses in the area between the covers with blade contacts. However, the difference between the lengths of the two fuse blade contacts corresponds at least approximately to the thickness of the primary chamber of the electrical measuring device housing and at the same time does not exceed one third of the fuse housing length between the blade contact covers.

In one of the possible embodiments of the assembly according to the invention, said electrical measuring device is a meter of electricity consumption in the electrical circuit in which the measuring device is installed and which is protected against electrical overloads by a fuse electric fuse with blade contacts.

The subject of the present invention is also a fuse electrical fuse itself, which is designed to be optionally used either alone or in combination with said housing of an electrical measuring device in the context of the previously discussed assembly according to the invention.

The fuse according to the invention generally comprises a tubular housing made of electrically non-conductive material, which is closed with a cover at each of its open opposite ends, and one electrically conductive blade contact is available on each of said covers. The blade contacts are flat and coaxially aligned and equally oriented and protrude away from the said housing, so that the fuse can be built into suitable fork contacts by means of said blade contacts. Inside the housing of said fuse is an electrically conductive and, under predetermined conditions, interruptible melting element, which is electrically connected to each of said blade contacts and preferably surrounded by a predetermined amount of bulk refractory arc extinguishing material. According to the invention, such a fuse is characterized in that the fuse housing is designed symmetrically with respect to the central longitudinal central plane, said blade contacts are extremely distributed with respect to the housing and for a predetermined distance, and for each selected total fuse length between the two extreme free ends of the blade contacts, one of the two blade contacts is for a predetermined length difference at least approximately corresponding to the thickness of the primary chamber of the housing. longer than the rest of the blade contact.

The distance between the dominant center plane of the blade contacts and the center plane of the fuse housing is selected depending on the complementary dimension of the housing of another complementary device, which is attached to at least one blade fuse contact and is intended for installation in each circuit complementary devices at least partially run along the fuse housing. However, said distance between the central plane of the blade contacts and the central plane of the fuse housing represents approximately 1/6 of the width of the fuse housing, which corresponds to at least about half the thickness of the fuse area of the running area of the housing of said complementary device. and provided for installation in each electrical circuit together with a fuse, so that the blade contacts are then centrally arranged with respect to the fuse assembly itself and said complementary device.

As mentioned, for each selected total fuse length between the two extreme free ends of the blade contacts, one of the two blade contacts is predetermined by a predetermined length difference from the rest of the blade contact, the length difference between blade contacts the length of the housing of the fuse itself and, mutatis mutandis, the complementary dimensions of the housing of the complementary electrical device which can be mounted on the longer blade contact of the fuse, in such a way that said longer blade contact is inserted through a suitably shaped passage through the housing of said other electrical device. is intended for installation in any electrical circuit together with said fuse. However, the difference between the lengths of the blade contacts does not exceed one third of the length of the fuse housing between the covers with blade contacts.

The fuse according to the invention is intended for use in assembly with the housing of another complementary electrical device, in particular an electrical measuring device, for example an electricity consumption meter in an electrical circuit in which a measuring device is installed and which is protected against electrical overload by a fuse with blade contacts.

The invention will be explained in more detail below with an example of an embodiment, which as such is presented in the attached sketch, where they show

Sl. 1 assembly of fuse electric fuse with blade contacts and electric measuring device in isometry;

Sl. 2 shows the assembly according to FIG. 1 in explosive view;

Sl. 3 the same composition in the sketch;

Sl. 4 the same composition in the floor plan;

Sl. 5 also shows said assembly in longitudinal section in the V - V plane according to FIG. 4, i.e. transverse to the dominant central plane of the blade contacts.

The assembly of the fuse 1 with the blade contacts IT, H and the electrical measuring device 2 is illustrated in the ready state for use in FIG. 1. In addition, the explosion display according to FIG. 2 shows the course of assembly or. disassembly e.g. in case of replacement of fuse 1 due to interruption of the circuit in case of short circuit or overcurrent in the electrical circuit in which said assembly according to the invention is installed, which means that said fuse 1 and said measuring device 2 via said blade contacts IT, 11 fuse 1 built into the same electrical circuit.

The fuse 1 as such is known to those skilled in the art and generally comprises a tubular housing 10 made of electrically non-conductive material closed at each of its open opposite ends by a cover 10 ', 10, on each of said covers 10', 10, one electrically conductive blade contact 1Γ, H is available.

The blade contacts 1Γ, H are plane and coaxially aligned and equally oriented and protrude away from said housing 10, so that the fuse 1 is mounted in suitable fork contacts, which are not shown in the sketch, by means of said blade contacts 1Γ, 11 for this purpose, provided in each electrical circuit provided for the installation of fuse 1.

Inside the housing 10 of said fuse 1 is an electrically conductive and, under predetermined conditions, interruptible melting element 12, which is electrically connected to each of said blade contacts 1Γ, 11 and preferably surrounded by a predetermined amount of bulk refractory material 13 for extinguishing the arc.

On the other hand, said electrical measuring device 2, which in combination with said fuse 1 represents a composition according to the invention, comprises a housing 20 made of electrically non-conductive material, in which the necessary electrical or electronic components are installed for measuring and optionally communicating. The housing 20 is provided with a through passage 21 adapted to ensure that the housing 20 is permeable to one of the blade contacts 1Γ, H of said fuse 1, so that after the electrical measuring device 2 is installed on each blade contact 1Γ, H of the fuse 1 and then by installing a fuse 1 in each available electrical circuit via said blade contact 1Γ, 11 fuse 1 also correspondingly corresponding electrical or electronic components inside said housing 20 of the electrical measuring device 2 are included in said electrical circuit passing through the electrical fuse 1

The housing 20 of the electrical measuring device 2 is secured against unintentional removal from the respective blade contact 11 ', 11 of the fuse 1 by means of a suitable guard 3. Each guard 3 can be designed in different ways. the fuse 3 allows either the housing 20 of the electrical measuring device 2 to be fastened to the blade contact 1Γ, 11 in terms of preventing its movement and accidental removal, while also the possibility of removing the housing 20 from the blade contact 11 ', 11, when necessary and the measure is decided by each user, and in the case shown (Figs. 1 and 2) said guard 3 represents a normal snap-in 3, which snaps into the notch 15 provided on both opposite dominant outer surfaces of the associated blade contact 11 'of fuse 1.

The common dimensions, namely the total length G, width 2A and depth T of the two mentioned housings 10, 20 in the assembly according to the invention, as well as the size and position of the blade contacts 1Γ, H correspond to those of conventional fuses and thus enable the installation of such a fuse assembly 1 and electrical measuring devices 2 into normal and standardized fork contacts in the respective electrical circuit.

In the context of solving the problem posed by the invention, the composition according to the invention is characterized by the fact that the otherwise uniformly designed housing 20 of the electrical measuring device 2 is shaped like an L in profile and comprises two parallelepiped chambers 20 ', 20 at least approximately perpendicularly, namely the primary chamber 20 ', which is arranged transversely with respect to the central longitudinal plane S of fuse 1, and a secondary chamber 20 arranged parallel to said central longitudinal plane S of fuse 1. The primary chamber 20' is provided with a through passage 21 for receiving the blade contact 11 ', 11 of the fuse 1 and of all those electronic components of the measuring device 2 which are in electrical contact with said blade contact 11', 11 of the fuse 1. The secondary chamber 20 is substantially perpendicular to and inside the primary chamber 20 ' at least substantially unobstructedly connected, but also adapted to rest on the fuse housing 10 in the area between the covers 10 ', 10' with the blade contact ma 1Γ, 11 and at the same time also to receive all other electrical or electronic components of the measuring device 2 which are not in direct contact with the blade contact 11 ', 11 of the fuse 1 during use as such.

In said fuse 1 and measuring device 2 assembly, the thickness F transversely with respect to the blade contact 11 ', 11 of the primary chamber 20' of the housing 20 of the electric measuring device 2 is selected so as to allow at least those electrical and electronic components of the measuring device 2 to be installed. , which must be in direct contact with the associated blade contact 11 ', 11 of fuse 1, and on the other hand ensure a sufficiently stable attachment of the housing 20 of the measuring device 2 to each blade contact 11', 11 with adequate protection of the housing 20 of the measuring device 2 against inadvertent removal from the blade contact 11 ', 11 of the fuse 1 by means of a suitable guard 3.

In addition, the thickness B of the secondary chamber 20 is selected so as to allow the receipt and installation of all remaining electrical and electronic components of the electrical measuring device 2, which are not included in the primary chamber 20 '. However, the electrical and electronic components of the electrical measuring device 2 in both chambers 20 ', 20 of the housing 20 of the electrical measuring device 2 are at least electrically interconnected and thus form a functional unit which ensures operation of said electrical device 2 in combination with fuse 1 and in the respective electrical circuit in which the assembly according to the invention is installed.

In said assembly of fuse 1 and electrical measuring device 2, the total length G of housings 10, 20 of fuse 1 and device 2, which reasonably represents the sum of the length of housing 10 of fuse 1 and said thickness F of the primary chamber 20 'of electrical measuring device 2, corresponds to standard housing length conventional fuses. Similarly, the depths T of the fuse housing 10 and the housing 20 of the electrical measuring device 2 are the same and correspond to the standard depths of a conventional fuse. Quite analogously, the width 2A (Fig. 5), which represents the sum of the thickness B of the secondary chamber 20 and the thickness of the housing 10 of the fuse 1, corresponds to the standard width of a conventional fuse.

On the other hand, in the mentioned assembly of fuse 1 and electrical measuring device 2 also the size and arrangement with the secondary chamber 20 of the housing 20 of the measuring device 2 parallel oriented blade contacts 11 ', H adapted to the size and arrangement of blade contacts in conventional fuses . For this purpose, a passage 21 is provided in the primary chamber 20 'of the housing 20 of the measuring device 2 for receiving the blade contact 11', 11, and the blade contacts 11 ', H are arranged in the fuse 1 on the fuse 1. This means that the blade contacts 1Γ, H are spaced from the central longitudinal plane S of the fuse box 10 by a predetermined distance E corresponding to half the thickness B of the secondary chamber 20 of the housing 20 of the electrical measuring device 2. Except for each selected total length L fuse 1 between the two extreme free ends of the blade contacts 1Γ, IT 'one of the two blade contacts 1 Γ, 11, according to FIG. 1 - 5, this is the contact 11 'provided for receiving the housing 20 of the electrical measuring device 2, for a predetermined length difference F longer than the rest of the blade contact 11.

Thanks to the mentioned difference in the lengths of the blade contacts 11 ', 11 on the fuse 1, the effective lengths of the fuse 1 assembly and the device 2 according to the invention of each protruding blade contacts 1Γ, H are the same, and the effective length of each contact in the assembly corresponds to in the case of standard fuses of the prior art. The mentioned difference in the lengths of the blade contacts 11 ', 11 does not, of course, constitute any obstacle even in the case of independent use of the fuse 1 as such, namely without the housing 20 of the measuring or other electrical device 2 mounted on it.

In order to maintain the functionality of the fuse 1, in particular to ensure a sufficient length of the fuse element 12, the robustness of the housing 10 and the required volume inside the housing 10 in the area around the fuse element 12, the following limits define certain parameters. the capacity of fuse 1, which is comparable to the tripping capacity of hitherto known and typed fuses.

For this purpose, according to the invention, the width B of the secondary chamber 20 of the housing 20 of the electric measuring device 20 does not exceed a quarter of the total width 2A (Fig. 5) of the primary chamber 20 'of the housing 20 of the electric measuring device 2. In other words, the width B of the secondary chamber 20 of the housing 20 of the electric measuring device 2 does not exceed a quarter of the sum of said width B of the secondary chamber 20 of the housing 20 of the electric measuring device 2 and the width G ₂ of the housing 10 of the fuse 1 on which the blade contact 1

It is also envisaged that the thickness F with the passage 21 for receiving the blade contact 11 'of the fuse 1 of the equipped primary chamber 20' of the housing 20 of the electrical measuring device 2 does not exceed a quarter of the total length G of the secondary chamber 20. 20 'of the housing 20 of the electrical measuring device 2 and the length of the housing 10 of the fuse 1 in the area between the covers 10', 10 with the blade contacts 1Γ, 11.

Furthermore, in this context, it is also envisaged that the difference F between the lengths of the two blade contacts 11 ', 11 of fuse 1 corresponds at least approximately to the thickness F of the primary chamber 20' of the housing 20 of the electrical measuring device 2 and does not exceed one third of the length 10 ', 10 with blade contacts 1Γ, 11.

In the composition according to FIG. 1 - 5 electrical measuring device 2 represents a meter of electricity consumption in the electrical circuit in which the measuring device 2 is installed and which is protected against electrical overloads by a fuse electric fuse 1 with blade contacts 1Γ, H.

In the context of the problem posed by the introduction, it will be understood by one skilled in the art that the invention is in no way limited to the application of a power meter and not even to the application of a predetermined electrical meter 2, but to an assembly in which fuse 1 is used in combination the housing 20 of the device, which can be mounted on one of the blade contacts 1Γ, 11 of the fuse 1 within the dimensions provided according to the invention.

Therefore, one of the aspects of the present invention is the fuse electrical fuse 1 (Figs. 2 and 5), which comprises a tubular housing 10 made of electrically non-conductive material, closed at each of its open opposite ends by a cover 10 ', 10, one electrically conductive blade contact 11 ', 11 is available on each of said covers 10', 10. The blade contacts IT, H are plane and coaxially aligned and equally oriented and project each other away from said housing 10. The fuse 1 can be installed in the suitable fork contacts by means of the above-mentioned blade contacts IT, H, which are provided for this purpose in each of the electrical circuits provided for the installation of the fuse 1. Inside the housing 10 of the fuse 1 is an electrically conductive and under predetermined conditions interruptible melting element 12, which is electrically connected to each of said blade contacts IT, 11 and preferably surrounded by a predetermined amount of bulk refractory material 13 for extinguishing the arc.

According to the invention, such a fuse electric fuse 1 with blade contacts IT, H is characterized in that the housing 10 of the fuse 1 is designed symmetrically with respect to the central longitudinal central plane S, said blade contacts IT and 11 are extremely arranged with respect to the central planes S, taking into account their flattened shape and orientation, are moved parallel to the distance by a predetermined distance E. 11 for a predetermined length difference corresponding at least approximately to the thickness F of the prefabricated primary chamber 20 'of the housing 20 for cooperating with the fuse 1 of the intended device 2, longer than the remaining blade contact IT, H.

Due to the possibility of using fuse 1 in the previously discussed assembly in combination with the housing 20 of the electrical measuring device 2, the mentioned distance E between the central plane of the blade contacts IT, H and the central plane S of the housing 10 of the fuse 1 is selected depending on the complementary dimension B device 2, which is fastened to the blade contact 11 'of fuse 1, so that its housing 20 runs at least partially along the housing 10 of fuse 1, and which is intended for installation in each electrical circuit together with fuse 1. Accordingly, the distance E between the central the plane of the blade contacts IT, H and the central plane S of fuse housing 10 represents approximately 1/6 of the width G, fuse housing 10, corresponding to at least about half the thickness B next to fuse housing 10 of the running area of the complementary electrical device housing 2 attachable to blade contact H 'fuse 1 and intended for installation in any electrical circuit paj with fuse 1, so that the blade contacts IT, H in the fuse assembly 1 and said device 2 are then centrally arranged.

On the other hand, in the context in question, the mentioned length difference F between the lengths of the blade contacts 11 ', H is chosen depending on the length G ₂ of the fuse housing 10 and also from the complementary dimension F of the housing 20 of the complementary electrical device 2. the blade contact 11 'of the fuse 1, thus making said longer blade contact H' insertable through a suitably shaped passage 21 through the housing 20 of said second electrical device 2 to be installed in each electrical circuit together with said fuse 1. In thus, the mentioned difference F between the lengths of the blade contacts IT, H does not exceed one third of the length G ₂ of the fuse housing 10 10 between the covers 10 ', 10 with the blade contacts 11', H.

PATENT APPLICATIONS

Claims (12)

PATENT APPLICATIONS An assembly of a fuse electric fuse (1) with blade contacts (IT, H) and an electrical measuring device (2), said fuse (1) and said measuring device (2) via said blade contacts (IT, H) of the fuse (1) simultaneously mounted in the same electrical circuit, and said fuse electrical fuse (1) comprises a tubular housing (10) of electrically non-conductive material closed at each of its open opposite ends by a cover (10 ', 10) , on each of said covers (10 ', 10) there is one electrically conductive blade contact (IT, H), said blade contacts (IT, H) being plane and coaxially aligned and equally oriented and projecting. away from said housing (10), so that the fuse (1) is mounted by means of said blade contacts (IT, H) in suitable fork contacts, which are provided for this purpose in the electrical circuit provided for the installation of the fuse (1). it is Inside the housing (10) of the fuse (1) there is an electrically conductive and, under predetermined conditions, interruptible melting element (12), which is electrically connected to each of said blade contacts (IT, H) and preferably surrounded by a predetermined amount of bulk refractory material. (13) for extinguishing the arc, and said electrical measuring device (2) comprises a housing (20) made of electrically non-conductive material, in which the necessary electrical or electronic components are installed in each case for measuring and optionally also for communication. said housing (20) provided with a through passage (21) adapted to ensure the ductility of the housing (20) to one of the blade contacts (IT, H) of said fuse (1), so that after installation the electrical measuring device (2) on the selected blade contact (11 ', 11) of the fuse (1) and the installation of the fuse (1) in the currently available electrical circuit via said blade contact (1 T, 11) of the fuse (1) also in the current electrical or electronic components inside said housing (20) of the electrical measuring device (2) are suitably connected to said electrical circuit passing through the electrical fuse (1), while the housing (20) of the electrical measuring device (2) is suitably guards (3) secured against unintentional removal from the respective blade contact (1Γ, H) of the fuse (1), with common dimensions, namely the total length (G), width (2A) and depth (T) of the two mentioned housings (10 , 20) in the assembly, as well as the size and position of the blade contacts (1Γ, 11), correspond to those of conventional fuses and thus allow the installation of such a fuse electric fuse (1) and electrical measuring device (2) in conventional and standardized fork contact in each electrical circuit, characterized in that the otherwise uniformly designed housing (20) of the electrical measuring device (2) in the profile is shaped like the letter L and comprises two at least approximately equal to each other angularly arranged parallelepiped chambers (20 ', 20), the primary chamber (20') being equipped with a through passage (21) for receiving the blade contact (1Γ, 11) of the fuse (1) and all those electronic components of the measuring device (2) , which during use are in electrical contact with said blade contact (1Γ, H) of the fuse (1), the remaining sensibly perpendicular and internally connected to it at least predominantly unobstructed secondary chamber (20) of the housing (20) of the measuring device (2) is adapted to rest on the housing (10) of the fuse (1) in the area between the covers (10 ', 10) with blade contacts (11', H) and at the same time adapted to receive all other electrical or electronic components of the measuring device (2) during use as such, they are not in direct contact with the blade contact (H ¹ , 11) of the fuse (1), the thickness (F) being transverse to the blade contact in said fuse (1) and measuring device (2) assembly. , H) arranged primary chambers (20 ') of the housing (20) of the electrical measuring device (2) so selected as to allow, on the one hand, the installation of at least those electrical and electronic components of the measuring device (2) which are in direct contact with the associated blade contact (11 ', H) of the fuse (1) and, on the other hand, a sufficiently stable attachment the housing (20) of the measuring device (2) on each blade contact (11 ', 11) with adequate protection of the housing (20) of the measuring device (2) against accidental removal from the blade contact (1Γ, 11) of the fuse (1) by means of a suitable guard (3), wherein the thickness (B) of the secondary chamber (20) is selected so as to allow the receipt and installation of all remaining electrical and electronic components of the electrical measuring device (2) not included in the primary chamber (20 '), at however, the electrical and electronic components of the electrical measuring device (2) in both chambers (20 ', 20) of the housing (20) of the electrical measuring device (2) are at least electrically interconnected and form a functional whole, and thus in the said assembly fuses (1) and el electric measuring devices (2), the total length (G) of the housings (10, 20), which is the sum of the length of the fuse housing (10) (1) and said thickness (F) of the primary chamber (20 ') of the electric measuring device (2) corresponds to the length conventional fuse housings, fuse depth (10) fuse housings (10) and electrical measuring device housings (20) (2) are identical to each other and also correspond to the depth of a conventional fuse, as well as the width (2A) representing the sum of the thickness (B) the secondary chambers (20) and the thickness of the fuse housing (10) (1) correspond to the width of a conventional fuse, said fuse (1) and electrical measuring device (2) also comprising the size and arrangement of the secondary chamber (20). ) of the housing (20) of the measuring device (2) of parallel-oriented blade contacts (11 ', 11) adapted to the size and arrangement of the blade contacts in conventional fuses, for which purpose a passage (21) in the primary chamber (20 ') of the housing (20) of the measuring device (2) of the central r arranged, and on the fuse (1) the blade contacts (1Γ, H) are arranged extraordinarily, namely they are distant from the central longitudinal plane (S) of the fuse housing (10) by a predetermined distance (E) corresponding to half the thickness (B) of the secondary chamber (20) of the housing (20) of the electrical measuring device (2), in addition, at each selected total length (L) of the fuse (1) both blade contacts (1Γ, H) for a predetermined length difference (F) longer than the remaining blade contact (1Γ, H). Assembly according to claim 1, characterized in that the width (B) of the secondary chamber (20) of the housing (20) does not exceed a quarter of the total width (2A) of the primary chamber (20 ') of the housing (20) of the electrical measuring device (2). Assembly according to claim 1, characterized in that the width (B) of the secondary chamber (20) of the housing (20) of the electrical measuring device (2) does not exceed a quarter of the sum of said width (B) of the secondary chamber (20) of the housing (20) measuring devices (2) and the width (G ₂ ) of the fuse housing (10) (1) on which the blade contact (11 ', 11) of the housing (20) of the electric measuring device (2) is mounted. Assembly according to one of Claims 1 to 3, characterized in that the thickness (F) of the primary chamber chamber (20 ') of the housing (20') is provided with a passage (21) for receiving the blade contact (1, 11) of the fuse (1). electrical measuring device (2) does not exceed a quarter of the total length (G) of the secondary chamber (20), but does not exceed the sum of the thickness (F) of the primary chamber (20 ') of the housing (20) of the electrical measuring device (2) and length ₂ ) fuse housings (10) (1) in the area between the covers (10 ', 10) with blade contacts (1Γ, 11). Assembly according to any one of claims 1 - 4, characterized in that the difference (F) between the lengths of the two blade contacts (1Γ, 11) of the fuse (1) corresponds at least approximately to the thickness (F) of the primary chamber (20 ') of the housing 20) electrical measuring devices (2) and at the same time not exceeding one third of the length (G ₂ ) of the fuse housing (10) (1) between the covers (10 ', 10) with the blade contacts (11', 11). Assembly according to one of Claims 1 to 5, characterized in that the electrical measuring device (2) is a meter of electricity consumption in the electrical circuit in which the measuring device (2) is installed and which is protected against electrical overloads by melting electrical fuse (1) with blade contacts (1Γ, H). A fuse (1) comprising a tubular housing (10) of electrically non-conductive material closed at each of its open opposite ends by a cover (10 ', 10) on each of said covers (10', 10). ), one electrically conductive blade contact (1Γ, H) is available, said blade contacts (1Γ, 11) being plane and coaxially aligned and equally oriented and projecting towards each other from said housing (10), so that by means of said blade contacts (1Γ, 11), the fuse (1) can be built into suitable fork contacts, which are provided for this purpose in the electrical circuit provided for the installation of the fuse (1). ) an electrically conductive and, under predetermined conditions, interchangeable fusible element (12) which is electrically connected to each of said blade contacts (11 ', 11) and preferably surrounded by a predetermined amount of bulk refractory material (13). for arc extinguishing, characterized in that only the fuse housing (10) (1) is designed symmetrically with respect to the central longitudinal central plane (S), said blade contacts (1Γ, 11) being extremely distributed with respect to the housing (10) and are from said central plane (S) taking into account their flattened shape and orientation, it is sensibly moved parallel and distant from it by a predetermined distance (E), and thus, at each selected total length (L) of the fuse (1) between the two extreme free ends blade contacts (11 ', 11) one of the two blade contacts (1Γ, 11) for a predetermined length difference corresponding at least approximately to the thickness (F) of the primary chamber (20') of the housing (20) for cooperating with the fuse (1). ) of the intended device (2), longer than the remaining blade contact (1Γ, 11). Fuse (1) according to claim 7, characterized in that said distance (E) between the central plane of the blade contacts (1Γ, 11) and the central plane (S) of the fuse housing (10) is selected depending on the shorter the width (G ^ of the fuse housing) (10) and at the same time from the complementary dimension (B) of the housing (20) of the complementary electrical device (2), which is attachable to the blade contact (1Γ, H) of the fuse (1), so that its housing (20) runs at least in part along the housing (10) of the fuse (1), and which is intended to be installed in the respective electrical circuit together with the fuse (1). Fuse (1) according to claim 7 or 8, characterized in that said distance (E) between the central plane of the blade contacts (1Γ, H) and the central plane (S) of the housing (10) of the fuse (1) represents approximately 1 / 6 of the shorter width (G]) of the fuse housing (10) (1), corresponding to at least about half the thickness (B) adjacent to the fuse housing (10) of the extending housing area (20) of the complementary electrical measuring device (2) is attachable to the blade contact (11 ', 11) of the fuse (1) and is intended for installation in each electrical circuit together with the fuse (1), so that the blade contacts (1Γ, 11) are in the fuse (1) and said device. 2) then centrally arranged. Fuse (1) according to any one of claims 7-9, characterized in that said difference between the lengths of the blade contacts (1Γ, 11) is selected depending on the length (G ₂ ) of the fuse housing (1) and, mutatis mutandis, the complementary dimensions (F) of the housing (20) of the complementary electrical device (2), which is adjustable to the longer blade contact (1Γ) of the fuse (1), in such a way that said longer blade contact (1Γ) is inserted through the gripper shaped passage (21) through the housing (20) of said second electrical device (2), which is provided for installation in each electrical circuit together with said fuse (1). Fuse (1) according to any one of claims 7-10, characterized in that said difference (F) between the lengths of the blade contacts (11 ', 11) does not exceed one third of the length (G ₂ ) of the housing (10) of the fuse itself (1). ) between the covers (10 ', 10) with the blade contacts (1 Γ, 11). Electric fuse (1) for use in assembly with the housing (20) of another electrical device (2), in particular an electrical measuring device according to any one of claims 1-5.