JP2001510979A - Electrical equipment protection measures - Google Patents

Abstract

(57) Abstract Protection schemes included in electrical installation systems are designed to prevent sources of fire or damage to the installation due to sudden electrical failure or elevated temperatures near the system. When the temperature rises to a certain predetermined level, a short circuit element is provided between the phase line and the zero or ground line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD AND BACKGROUND OF THE INVENTION

The present invention relates to protection arrangements included in electrical installation systems, and in particular, such new arrangements cause fire or damage to equipment due to sudden electrical failure or temperature rise in the vicinity of the complete assembly of the arrangement. Designed to prevent.

Existing protection measures designed to be included in conventional electrical installations are intended to prevent harm to the human body due to electric shock. Conventional means do not take into account the possibility of damage to the article or the prerequisites caused by short circuits and the resulting sparks or elevated temperatures. Heating of electrical wires is a normal phenomenon and the consequences are well known and need not be further explored.

[0003] The new protection arrangement is based on the realization that when the temperature rises inside or near such new protection measures, the new measures are activated, and the decoupling of all circuits from the grid prevents damage.

[0004]

[Scope of the Invention]

According to the present invention, the purpose is to provide each electrical system component with a new short circuit between "phase" and "zero" or "ground" when the temperature rises to some predetermined level. Achieved by incorporating components.

In accordance with the present invention, new configurations relate to components such as bimetallic open / close fuses or switches or thermal fuses or switches and similar components of a known type used for various purposes.

A device such as the one described above has its two terminals connected to the “ground” and “zero” of the wall socket.
Alternatively, they are contained within a single wall socket by fixedly connecting to terminals such as "zero" and "phase" or "phase and ground".

[0007] It is also within the scope of the present invention to include the above components or devices in an electrical plug.

As noted above, a number of factors are used to use the invention in the following description. As an example, reference is made to a bimetallic switching device.

The present invention will be described in detail with reference to the accompanying drawings.

[0010]

[Description of preferred embodiments]

Referring to FIGS. 1 and 2, a known bimetallic switching device includes a box-shaped molding 10 having two terminal wires extending therefrom. As shown in FIG. 3, the molding includes two metal terminals 11 'and 11 "of different coefficients of thermal expansion. At normal current, the terminals 11' and 11" are separated from each other, i.e., The contact is open. In any part of the system, as the temperature increases, the terminals 11 'and 11 "will snap towards each other and the contacts will be closed.

In the example of FIG. 4, an overview of the electrical installation is shown, comprising a main pipe 1 guided from a respective grid and supplying a system including a main switch 2 and a leaky relay 3 having a consumer switch 4. And a consumer line 5 leading to electrical equipment, such as a wall socket 6, for example. 3 is inserted into the wall socket, including the terminals 11 'and 11 ". The terminals 11' and 11" are, according to an example, connected to the "ground" and "zero" terminals of the wall socket 6. It is connected.

At normal current, there is no contact between the “ground” and “zero” terminals of the socket 6. However, if the temperature in the socket 6 rises, the bimetallic installation 10 achieves a leaky relay 3 from the mains 1, i.e. a short circuit 11'-11 "operation for all consumer installations.

It is very obvious that the device is mounted between any two other terminals.

Those skilled in the art will appreciate that incorporating such new means at every consumer outlet will protect all systems, including leaky relays and mains lines from the power grid over the mains. .

By way of example, new safety measures have been described in connection with a wall socket, such measures being provided in other installations, such as coupler sockets (commonly called “receptacles”) and coupler plugs. It is clear that they can be similarly incorporated in lamp housings and the like.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a conventional bimetallic switching device.

FIG. 2 is a front view thereof.

FIG. 3 illustrates the functionality of the device of FIGS. 1 and 2 in a schematic manner.

FIG. 4 graphically illustrates by way of example an electrical installation including a socket into which new means are inserted.

Claims (6)

[Claims] 1. Means of protection for an electrical installation, comprising a heat-sensitive element as a component of the respective electrical system. 2. The protection means according to claim 1, wherein said protection means is a bimetal switch. 3. The protection means of claim 1, wherein the protection means is a thermal fuse. 4. The means of protection of claim 1, wherein the means is a temperature switch. 5. The electrical installation system of claim 1, wherein the wall socket includes the “ground,” “zero,” and “phase” terminals of the protection means of claim 1. 6. The electrical installation system according to claim 1, comprising two terminals of a composite socket or composite plug respectively connected to two terminals of said means of claim 1.