CN107004532B

CN107004532B - Vertical fuse holder base

Info

Publication number: CN107004532B
Application number: CN201580048835.7A
Authority: CN
Inventors: 乔斯·胡里奥·戈梅斯巴贝欧
Original assignee: Pronutec SA
Current assignee: Pronutec SA
Priority date: 2014-08-13
Filing date: 2015-08-03
Publication date: 2020-08-07
Anticipated expiration: 2035-08-03
Also published as: EP2985779B1; CN107004532A; EP2985779A1; AU2015303065B2; PL2985779T3; WO2016024033A1; AU2015303065A1; ES2875027T3; IL250584A0

Abstract

The present disclosure relates to a vertical fuse holder base body, preferably for NH-type fuses, having means for measuring and/or monitoring different electrical parameters, and substantially comprising: a substrate (1) in which a plurality of pairs of contacts (2) are housed; a fuse (6) connected to each pair of contacts (2) such that it can be coupled to each pair of contacts (2) so as to close the circuit and can be uncoupled from each pair of contacts (2) so as to open the circuit; at least one connection terminal (3) for supplying a load with electrical power; and a housing (4) which is located in the region of the connection terminals (3) for mounting at least one current sensor (5).

Description

Vertical fuse holder base

Technical Field

The present disclosure is in the field of electrical devices and relates to a vertical fuse holder base for an electrical panel, preferably for a fuse of the type known as "NH".

More specifically, the vertical fuse holder base of the present disclosure is three-pole and has means for measuring and/or monitoring different electrical parameters.

Background

There is an increasing trend to monitor power consumption in order to save energy and thus cost, to benefit the environment and optimization of power distribution equipment.

For this purpose, it is necessary to know a series of parameters of the grid, such as power consumption, active and reactive parts of the grid, energy, phase-to-phase balance, etc., and therefore, a measuring device should be installed on the low-voltage board of the corresponding electrical device so that the voltage consumption value and the current consumption value can be determined so that the required parameters can be obtained when processing the voltage consumption value and the current consumption value.

In the case of a low-voltage board fuse holder base body, it is known to use for this purpose a current transformer (toroidal transformer) or other type of current sensor (Rogowski coil type or other type) between the connecting strip of the fuse holder base body and the busbar of the low-voltage board, wherein the current transformer or current sensor is wound in place on a conductor through which the current flows.

However, these solutions have a certain complexity in terms of installation, since it is necessary in particular to fit each ring-core transformer on its respective terminal.

An example of a known alternative mounting can be found in documents such as DE-10062644, in which document DE-10062644 it is shown how a current transformer is mounted between a fuse holder base body and a low-voltage board, for which purpose a conductor bushing needs to be provided between the low-voltage board input connection strip and the conductor strip.

Similarly, in DE-29705224, the transformer is mounted on a special support bracket attached between the fuse holder base and the low-voltage board connection bar.

Finally, in DE-10002800-a1, another arrangement can be seen in which the transformer has a specific layout that allows it to be attached to the base input bar.

However, these cases have the disadvantage of complexity in the assembly process in situ, in addition to the problems involved by the fact that they are not visible under normal working conditions due to mounting at the rear side and in one of the hottest areas of the base body. In this connection, it must also be added that it is not suitable for fuse holder base bodies that have already been mounted on the electrical panel beforehand, in which case it is at least necessary to remove the base body completely.

To overcome these problems, the prior art presents modules or fittings connected to the fuse holder base, such as for example shown in DE202010017635 or in spanish patent application P201031633 by the same applicant, wherein the module is described in one piece comprising three conductor bars connected to each of the contacts of the fuse holder base, at least one current transformer and a connection junction block to facilitate mounting.

Although these modules or accessories can serve the purpose of providing data regarding the current and voltage consumed by the devices or equipment connected thereto, they also have some drawbacks.

In particular, these drawbacks are mainly due to the fact that: these modules are additional connection points on the substrate, and thus characterize points in the substrate where hot spots may occur. In addition, it is common that there is no space available on the plate member on the pre-installed fuse holder base body, so that the fuse holder base body cannot be installed in a simple and straightforward manner.

Disclosure of Invention

The vertical fuse holder base of the present disclosure overcomes the above-described problems of the prior art because the vertical fuse holder base of the present disclosure allows the principal electrical parameters to be known/measured without compromising the mounting of the base.

Specifically, the vertical fuse holder base of the present disclosure is a three-pole base for a fuse known as the "NH" type, and includes three pairs of contacts, one contact per phase, electrically connected to the fuse and to the input and output conductors of the base. These input and output conductors respectively allow the base body to be connected to the busbar system of the switchboard and to the respective conductors enabling the base body to be connected to the supplied unit.

As in the case of the base of the present disclosure, the base model has a load-break switch thereon, with an actual fuse coupled in each pair of contacts, the actual fuse being fitted on a cover that is foldable with respect to the body of the fuse holder base provided with the plurality of pairs of contacts. In this way, when the cover is closed on the base, the fuses are coupled in their respective pairs of contacts, thereby closing the electric circuit, and when the cover is opened, the fuses are disconnected with respect to these contacts.

Finally, the vertical fuse holder base body has three connection terminals at its output, to which respective cables are connected to provide the power supply to the units located downstream. As is known, these terminals can be of different types depending on the type of connection desired, for example screws, nuts, direct connection flanges, etc.

In addition, the vertical fuse holder base of the present disclosure includes a housing in the area of the connection terminals to enable mounting of at least one current sensor inside the housing.

To this end, the vertical fuse holder comprises in this region anchoring means by which the sensor is firmly attached to the base body, and if necessary also allows removal of the sensor.

In this way, according to the preferred embodiment, the current sensor can be removed for replacement or repair by simple reinstallation without performing complicated work. This also enables the sensors to be fitted to any fuse holder substrate according to the present disclosure without the sensors having to be initially installed. In other words, a user can obtain the vertical fuse holder base of the present disclosure and, if desired, can then fit one or more sensors to monitor or measure electrical parameters.

All this means that the vertical fuse holder base of the present disclosure can overcome the above-mentioned problems of the prior art because:

the mounting of the measuring system is facilitated, since the measuring system can be mounted or fitted on the actual base body after shipment;

the sensor can be easily fitted and/or removed;

by not adding new connection means, hot spots can be prevented;

in case of solutions where the measuring module is external, space can be saved;

the sensor is still accessible and even visible from the front;

the transformer area is fully protected and only the connection points are exposed.

Drawings

In order to supplement the description given and to assist a better understanding of the characteristics of the present disclosure, according to a preferred example of a practical implementation of the present disclosure, a set of drawings is attached as an integral part of the present description, wherein on an illustrative and non-limiting basis the following figures are shown:

figure 1-which shows a perspective view of a vertical fuse holder base with the body removed, in accordance with a possible embodiment of the present disclosure.

Figure 2-which shows a perspective view of the vertical fuse holder base of figure 1 with the body and the fold cover attached.

Figure 3-which shows a perspective view of the vertical fuse holder base of figure 2 with a portion of the protective element removed to better show the connection terminals and current sensor.

Figure 4-which shows a schematic perspective view of an end of a vertical fuse holder base of the present disclosure, wherein possible mounting of sensors coupled to the connection terminals can be more clearly seen.

Detailed Description

As can be seen in the example shown in the figures, the three-pole vertical fuse holder matrix of the present disclosure comprises a body (7) and a baseplate (1), in which baseplate (1) three pairs of contacts (2) are housed for connection to the input and output conductor bars of the respective vertical fuse holder matrix.

In each pair of contacts (2) there is associated the actual fuse (6), the fuse (6) being mounted on a cover (9), the cover (9) being foldable relative to the base plate (1) of the vertical fuse holder base in which the pairs of contacts (2) are housed. In this way, when the cover (9) is closed on the vertical fuse holder base, the fuses (6) are coupled in their respective pairs of contacts (2) so as to close the electric circuit, and when the cover is opened, as seen in fig. 2 and 3, the fuses (6) are disconnected with respect to these contacts (2), thereby opening the electric circuit.

As can also be seen in the figures, at the output of the vertical fuse holder base body there are arranged connection terminals (3), in this case three connection terminals (3), to which respective cables are connected for providing the supply of power to loads located downstream.

In addition, the vertical fuse holder base of the present disclosure comprises a housing (4) in the area of the connection terminals (3) such that at least one current sensor (5) for said connection terminals (3) can be mounted within the housing (4), said at least one current sensor (5) being attachable to the actual connection terminals (3) or to the substrate (1) according to different embodiments of the present disclosure.

In both cases, however, such attachment between the current sensor (5) and the vertical fuse holder base will be achieved by using anchoring means that allow the current sensor (5) to be connected and the current sensor (5) to be disconnected, whether by the connection terminal (3) or by the substrate (1).

These current sensors (5), which may be, for example, inductive current transformers, Rogowski coils or open core coils, etc., each have their respective output connections, or, according to a possible embodiment, each have a single common output connection for transmitting data of all the phases being monitored.

Furthermore, these output data can be analog data measured directly or digital data, for which purpose an a/D conversion module is included which is connected to the output of the current sensor (5), the a/D conversion module being provided with an output which can be connected to a data processor for analyzing the information obtained from the sensor measurements.

Furthermore, according to another possible embodiment of the present disclosure, not shown, the current sensor (5) may be arranged in a contiguous manner such that the current sensor (5) forms a single unit or measuring block, it being also possible to include the current sensor (5) into the vertical fuse holder base of the present disclosure by means of an anchoring means.

In addition, in order to prevent accidental contact, the area of the vertical fuse holder base body for housing the current sensors (5) is provided with a protection element (8), the protection element (8) preventing accidental contact with the live components and at the same time protecting these current sensors (5) from accidental blowing.

Furthermore, the above can be seen in the figures, in particular in the examples of embodiments shown in the following figures: in the figure, the lower portion of the vertical fuse holder base for accommodating the current sensor (5) is made to have a U-shaped cross section.

Finally, according to another possible embodiment, the vertical fuse holder base of the present disclosure can comprise, in the housing (4), a power connection (not shown) which can be protected by an overload protection device and/or a short-circuit protection device, such as its own fuse (not shown), and which is provided with a single output connection at which the signals from the three current sensors and the power connection are collected.

Finally, according to another possible embodiment, the a/D converter is applied to the power connection means.

Claims

1. A vertical fuse holder base comprising:

-a substrate (1), said substrate (1) housing a plurality of pairs of contacts (2);

-a fuse (6), the fuse (6) being connected to each pair of contacts (2) such that the fuse (6) is coupleable to each pair of contacts (2) thereby closing an electric circuit and is decouplable from each pair of contacts (2) thereby opening the electric circuit; and

-at least one connection terminal (3), the at least one connection terminal (3) being adapted to provide a power supply to a load,

characterized in that the vertical fuse holder base body further comprises a housing (4), the housing (4) being located in the region of the connection terminals (3) for mounting at least one current sensor (5), and anchoring means are provided on the base plate (1) or at the connection terminals (3) allowing the current sensor (5) to be fastened to the vertical fuse holder base body and the current sensor (5) to be removed from the vertical fuse holder base body, wherein the at least one current sensor is connected to the substrate by the anchoring means and such that the connection terminal penetrates into the current sensor, or the at least one current sensor is connected to the connection terminal by the anchoring means, such that the at least one current sensor is attached to the vertical fuse holder base.

2. The vertical fuse holder base according to claim 1, characterized in that the current sensor (5) forms a single measuring unit or measuring block.

3. The vertical fuse holder base of claim 2, characterized in that the current sensor (5) comprises an output connection.

4. The vertical fuse holder base according to claim 3, characterized in that the current sensor (5) has a single common output connection.

5. The vertical fuse holder base according to claim 4, characterized in that the current sensor (5) comprises an output to which an A/D conversion module is connected.

6. The vertical fuse holder base according to claim 1, characterized in that it comprises a protective element (8) in the area for housing the current sensor (5).

7. The vertical fuse holder base according to claim 1, characterized in that the current sensor (5) is housed in a lower portion of the vertical fuse holder base, and the lower portion is formed to have a U-shaped cross section.

8. The vertical fuse holder base according to claim 5, characterized in that it comprises power connection means associated with each connection terminal (3) in the housing area.

9. The vertical fuse holder base of claim 8, wherein each of the power connections has an output connection.

10. The vertical fuse holder base of claim 9, wherein the output connection is single and signals from the three current sensors and the power connection are to be collected at the output connection.

11. The vertical fuse holder base of any one of claims 8 to 10, wherein the electrical connection means comprises an overload protection device and/or a short circuit protection device.

12. The vertical fuse holder base of any one of claims 8 to 10, wherein the a/D conversion module is applied to the power connection device.