ES2367815T3 - MULTIPOLAR SWITCH SAFETY PROVISION FOR OMNIBUS BAR SYSTEMS. - Google Patents

Abstract

The arrangement has a housing (20) and switch safety units (100), where each switch safety unit exhibits a receiving chamber (110) for a safety plug (120), into which a safety insert (130) is inserted. An output contact screw (144) fixes a line at an output contact of the safety unit. The contact screw is simply actuated by an input channel (140). The safety plug is designed such that the plug covers the input channel for the output contact screw in its operating position in a measure, which ensures a contact protection for the contact screw.

Description

The invention relates to a multipolar switch safety arrangement for busbar systems with at least two switch safety units for each housing a fuse cartridge.

Such switch safety arrangements are especially used to protect three-phase circuits by fuse, three-pole switch safety arrangements being necessary.

A switch security unit of this type is known, for example, from DE 199 37 017 C1, on which the applicant is also based.

A problem with such switch safety arrangements is especially that they are also handled by inexperienced workers, and it must be ensured that conductive parts in the operating state cannot be touched to avoid a risk of operating personnel.

From EP 1 246 212 B1, for example, a multipolar switching device is known for use in busbar systems, in which a cover is provided, which is closed and locked after the introduction of the fuse or cartridge cartridges. the safety pins, so that the entire upper side of the switch safety arrangement including the safety pins and the output contact screws is located under this cover 11.

Another example is known from DE 197 34 233 A1.

It is an objective of the present invention to make available an improved system that effectively prevents erroneous handling also by inexperienced workers.

This objective is solved by a switch safety arrangement according to claim 1, with claims 2 to 7 particularly advantageous embodiment of the switch safety arrangement according to the invention contemplated.

According to the invention, the multipolar switch security arrangement for busbar systems comprises a housing and has at least two switch security units, however preferably three switch security units, in which each switch security unit comprises a housing chamber for a safety pin, into which a fuse cartridge can be inserted. In addition, each switch security unit comprises an output contact screw for fixing a cable to an output contact of the switch security unit, in which the housing is configured so that the output contact screw can be manipulated only through an input channel. According to the invention, a safety plug is provided for each housing chamber that can be inserted into an operating position in the housing chamber, in which according to the invention the safety plug is configured so that it covers the operating position of the corresponding input channel for the output contact screw at least one extension that guarantees protection against accidental contact.

An input channel cover for the output contact screw then meets the requirements of an accidental contact protection when the cover is configured so that an operator cannot touch the exit contact screw with one finger. Preferably, the input channel is completely covered by the safety pin in its operating position, however, in case of other embodiments, covers are also sufficient to ensure that no grooves are produced that are so large that the risk of a contact of the output contact screw by a body part of the user, especially a finger.

By means of this configuration according to the invention it is automatically guaranteed that in the case that a safety pin is inserted into its operating position in the housing chamber, the corresponding contact-proof output contact screw is covered. Therefore it is also impossible for an inexperienced worker to insert a safety pin with a fuse cartridge into the switch safety arrangement in its operating position, however simultaneously keeping the output contact screw still accessible, as is the case for example in document EP 1 246 212 B1, in which the safety plugs and the fuse cartridges must be brought in their entirety to the operating position, before the cover is closed, in a working stage additionally, so that before closing the cover the exit contact screws are still accessible and a risk of the operating personnel cannot be ruled out.

The safety arrangement of multipolar switch according to this invention effectively discards a possible risk of this type, therefore it does not need any special precautionary measures by the operating personnel, in addition no additional step is necessary to cause a safety against the Contact.

Since security against contact is produced by the safety pin itself, there is also no risk that, for example, cover 11, as described in EP 1 246 212 B1, will break or deteriorate, however simultaneously, the switch safety arrangement can also be kept ready. This also results in high security.

At the same time, production costs are very low since no additional element has to be provided for protection against accidental contact. The lifetime of the entire system is also relatively high, since typical sources of failures are avoided and occur frequently, such as the articulation or hinge of the cover 11 in EP 1 246 212 B1. In addition, a cover 11 of this type in the opening maneuver protrudes greatly outward, which on the one hand increases the risk of deterioration and on the other hand leads to the fact that the distribution cabinet doors cannot be closed, while an arrangement of Switch safety according to the invention avoids this inconvenience and keeps the entire system flat.

Preferably, the multipolar switch security unit according to the invention comprises a combined switching and blocking device, as described in DE 199 37 017 C1, which is taken in its entirety herein by reference.

In a preferred embodiment, the input channel for the output contact screw has an opening that is arranged on the same side of the housing of the switch safety arrangement as the housing chambers for the safety pins. According to this, easy and especially convenient accessibility of the switch safety arrangement by the operating personnel is allowed. Preferably, the input channel and the housing chamber are arranged essentially parallel to each other.

In a special embodiment, the safety pin has a cover area that extends at least partially over the opening of the inlet channel, so that protection against accidental contact is guaranteed. Such a cover area can also be used as a handle to easily handle the safety pin and insert it into the corresponding housing chamber.

In a further embodiment, a retention device is provided in the housing chamber which is configured so that the safety pin can be retained in its operating position, in which in a special embodiment the retention device is configured either in a single piece with the housing as reinforcement of the housing or is formed by a reinforcement element that is placed in the housing.

This retention device formed by a reinforcement or a reinforcement element has not only the advantage that the safety pin can be safely held in its locked position, but also the housing can be further reinforced in the area where it can be There is a special burden. It should be noted at this point that this special configuration of a retention device has an independent inventive content, which is also valid regardless of the cover described above of the input channel by means of the safety plug and the protection against accidental contact automatically obtained therewith.

However, a combination of these two aspects also leads to a special combinatorial effect, since by means of the reinforcing element it is especially ensured that the safety pin is prevented from being removed or displaced by carelessness also only partially from the operating position outward, which for example could occur in case of a deterioration of the retention device, which however is avoided by the reinforcing element. With the retention device, which is carried out on the contrary, for example by means of an opening in the housing, which would also be functionally possible, the housing would otherwise be weakened at this critical point.

In a particularly preferred embodiment, the housing and the safety plugs are configured so that in an operating position of the safety plugs the upper side of the safety plug and the upper side of the housing essentially extend flatly or keep going. Accordingly, it is especially guaranteed that the upper side of the housing does not offer any contact point or any contact surface that could lead to unwanted deterioration of the housing or also to an unwanted removal of the safety pin. In addition, an especially aesthetic optical effect is also obtained.

These and other features and advantages of the invention become even more explicit by means of the attached drawings:

figure 1

shows a perspective view of an embodiment of a switch safety arrangement according to the invention for bus bar system with three switch safety units;

figure 2a

shows a cross-sectional view of a part of an embodiment of a switch safety arrangement according to the invention, in which only one switch safety unit is shown and in which a safety pin is shown in its position extracted;

figure 2b

shows an enlargement of the fragment of figure 2a;

Figure 3a shows the fragment shown in Figure 2a, in which the safety plug is partially inserted in the switch safety unit;

Figure 3b shows an enlargement of the fragment of Figure 3a;

Figure 4a shows the fragment shown in Figure 2a with a safety pin fully inserted into its operating position;

Figure 4b shows an enlargement of the fragment of Figure 4a.

Figure 1 shows in perspective an embodiment of a multipolar switch security arrangement 10 according to the invention, which in total has three switch security units 100. The switch security arrangement 10 comprises a housing 20, which may be configured in a single part or in multiple parts, in which in the embodiment shown in this figure a multi-part housing 20 is provided. The housing can be composed of plastic or metal materials or also a combination of different materials.

Each of the switch security units 100 comprises a housing chamber 110 for a security pin 120, into which a fuse cartridge 130 can be inserted.

In figure 1 there are two safety pins 120 in their operating position, while a safety pin 120 is in its fully removed position.

In Fig. 1, an input channel 140 is also evident for an output contact screw (144, see for example Fig. 2a), which is accessible with a safety plug 120 removed, however with safety pins 120, which they are in the operating position, as the two safety pins on the right in the figure, are covered and not accessible, so that the safety pins 120 in their operating position represent an effective accidental contact protection.

Figure 2a shows a cross-sectional view of a part of an embodiment of a switch safety arrangement according to the invention, in which to simplify only a switch security unit 100 is represented, in which however also This embodiment shown in Figure 2a of the switch security arrangement comprises a total of three switch security units 100.

The safety plug 120 is shown in its fully removed position, in which a fuse cartridge 130 is inserted in the safety plug 120.

The output contact screw 144, which is accessible or can be manipulated through an input channel 140 with an opening 142, is clearly shown in Figure 2a, so that a cable can be connected via the output contact screw ( not shown).

Figure 2b shows an enlargement of the fragment of the embodiment shown in Figure 2a in the area of the housing chamber 110, in which a retaining device 160 which is configured in FIG. so that the safety pin can be held in its operating position, see especially figures 3a, 3b and figures 4a, 4b.

The retention device 160 is configured in a single piece with the housing and reinforces the housing in this area to ensure particularly safe and stable retention.

Figure 3a shows the embodiment represented in Figure 2a, in which however the safety pin 120 is widely inserted in the housing channel 110. Figure 3 clearly shows that a cover area 122, which is made of in an elongated manner, it covers the input channel 140 with its opening 142, so that the output contact screw 144 is no longer accessible in this position of the safety pin.

Figure 3b shows an enlargement of the fragment of Figure 3a, from which it is evident that a counter-element 128 of the safety pin 120 can be contacted with the retention device 160, which is provided in the housing channel 110 of switch security unit 100.

Figure 4a shows the embodiment represented in Figures 2 and 3, in which the safety pin 120 is in its operating position. It is clearly evident that in the operating position, the cover area 122 of the safety pin 120 covers the input channel 140 and the opening 142 of the input channel 140 in an extension that guarantees protection against accidental contact, i.e. that the output contact screw 144 is not accessible from the outside and cannot be manipulated.

Fig. 4b is an enlargement of the fragment that clarifies how the counter-element 128 of the safety pin 120 contacts the retaining device 160, so that the safety pin 120 is securely held in its operating position.

The features of the invention disclosed in the claims, description and drawings can be essential both individually and in any combination for the embodiment of the invention.

Claims (7)

1. Multipolar switch security arrangement (10) for busbar systems with a housing (20) and with at least two switch safety units (100), in which each switch security unit (100) presents a housing chamber (110) for a safety pin (120), into which a fuse cartridge (130), and an output contact screw (144) can be inserted to fix a cable to a contact output of the switch safety unit (100), in which the housing (20) is configured so that the output contact screw (144) can only be manipulated by an input channel (140), and in the that each housing chamber (110) has a safety pin (120) that can be inserted into an operating position in the housing chamber (110), characterized in that each safety pin (120) is configured to cover its operating position the corresponding input channel (140) for the output contact screw (144) in an extension that guarantees protection against accidental contact for the output contact screw. 2. Switch security arrangement according to claim 1, characterized in that the input channel (140) for the outlet contact screw (144) has an opening (142) that is arranged on the same side of the housing (20) as the housing chamber (110) for the safety pin (120).

3.

Switch safety arrangement according to claim 1 or 2, characterized in that the safety pin (120) has a cover area (122) that extends at least partially over the opening (142) of the input channel (140).

Four.

Switch safety arrangement according to one of the preceding claims, characterized in that in each housing chamber (110) a retention device (160) is provided which is configured so that the safety pin (120) can be held in its position of functioning.

5.

Switch safety arrangement according to claim 4, characterized in that the retention device (160) is formed by a reinforcing element that is placed in the housing (20).

6.

Switch safety arrangement according to claim 4, characterized in that the retention device (160) is formed by a housing reinforcement.

7.

Switch safety arrangement according to one of the preceding claims, characterized in that the housing (20) and the safety pins (120) are configured so that in the operating position of the safety pins (120) the upper side of the safety pins (120) and the upper side of the housing

(20) extend essentially flat.