CN217215224U

CN217215224U - Covering piece, electrical device and switch equipment

Info

Publication number: CN217215224U
Application number: CN202220086249.9U
Authority: CN
Inventors: L·维泰克; T·帕萨洛夫
Original assignee: ABB Schweiz AG
Current assignee: ABB Schweiz AG
Priority date: 2021-01-15
Filing date: 2022-01-13
Publication date: 2022-08-16
Anticipated expiration: 2032-01-13
Also published as: DE202021100187U1

Abstract

The utility model relates to a covering, electrical device and switchgear. The covering element has a base body, wherein the base body has rigid plastic parts which are connected to one another or connected to one another in a form-fitting manner.

Description

Covering piece, electrical device and switch equipment

Technical Field

The present invention relates to a cover for the direct electrical connection of a component, in particular an air circuit breaker, to a busbar.

Background

Air circuit breakers and laminated busbars which are electrically connected to one another are known from the prior art. Such a busbar is known from WO 2018/114692 a 1.

It is necessary to prevent contact with the direct connection of the air circuit breaker to the laminated bus bar to protect personnel. For example, the air circuit breaker may be conductively connected to the laminated bus bar by means of angled rails.

At present, the direct connection of the air circuit breaker to the main busbar is electrically insulated by means of a shrink hose and a self-adhesive rubber band. This type of electrical insulation is expensive, time consuming to install and package ready, and is not as useful where protection ratings according to IP20 are required.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses an aim is: a protective device for the direct electrical connection between a busbar and a component, in particular a switch, is proposed, which ensures efficient contact protection, in particular according to protection class IP20, while being easy to install.

According to the invention, the covering element comprises a base body, wherein the base body comprises rigid plastic parts which are connected to one another or are connected to one another in a form-fitting manner.

According to the invention, it was firstly recognized that an inexpensive and quickly installable protective device must be created which in particular achieves contact protection according to IP20 and can insulate well the direct electrical connections to the busbars (in particular stacked busbars). Hereby it is realized that a very stable protection can be created by a cover comprising a suitably pre-deformed rigid plastic part. Such plastic parts can be easily assembled and fixed on site at already existing installations, in particular at switchgear. In this respect, the present invention relates to a mechanical solution for electrically insulating an air circuit breaker from direct connections of stacked busbars. The mentioned matrix ensures contact protection according to the protection type or class IP 20. In particular, the matrix prevents contact with active components (e.g. current-conducting phase conductors).

Advantageously, at least one plastic part is made of a material that is light-transmitting or at least partially transparent. Thus, the mounting under the cover can still be visually or optically perceived without removing the plastic part. All plastic parts are preferably made of a material that is light-transmitting or transparent.

Advantageously, at least one of the plastic parts is made of polycarbonate. The base body of the cover comprises polycarbonate or is at least partially or completely made of this material. Thus, the mounting under the cover can still be visually perceived. Polycarbonates can be processed easily.

Advantageously, the cover comprises four plastic parts, namely two side walls, an upper part and a lower part, wherein the side walls are connected with the upper part and/or the lower part, respectively, by means of a latching device. In this way, the four plastic parts can be connected to one another without further mounting parts or tools, in the first place, without the plastic parts being easily tipped over. In addition to the connection being less prone to tipping over, other mounting means may be used to ultimately stabilize the cover.

Advantageously, the locking device has a tongue and a tab for receiving the tongue, wherein the tongue is formed at an edge of the first plastic part, wherein the tab is formed at an edge of the second plastic part, and wherein the tongue is received in the tab in order to connect the two plastic parts in a form-fitting manner, i.e. to engage through the tab. Thus, two or more plastic parts can be reversibly connected to each other without external tools.

Advantageously, the cover comprises a locking strip, wherein the locking strip extends between two separate plastic parts and engages through the locking hole at each of the two plastic parts, respectively. Therefore, the cover member configured to be less likely to fall over can be finally stabilized to prevent collapse or scattering. Preferably, four locking strips are provided, which extend between the side walls, wherein two locking strips each rest against the upper part and the lower part.

Advantageously, the locking hole is configured in a tongue of the plastic part. The locking strip can therefore also be fixed, in particular reversibly fixed, at the plastic part without external auxiliary means (for example screws).

Advantageously, the lattice structure is formed in at least one plastic part and/or the elongated holes are formed in at least one plastic part, which are separated from one another by struts. Thereby, a ventilation device is achieved, such that the electrical connection or the entire electrical device can be ventilated or cooled under the cover by convection.

Advantageously, the lattice structure is not constructed in the side walls. Thereby, convection currents or air are advantageously guided. Furthermore, contact protection from the side is ensured in a special manner.

Advantageously, an apparatus comprises a laminated busbar, an air circuit breaker, and a cover of the type described herein, wherein the cover surrounds a conductor or an angled rail that conductively connects the laminated busbar with the air circuit breaker in a contact-proof manner. The proposed cover can be assembled on site and screwed as a whole to an already existing device of the switchgear, which has a stack of busbars. The cover does not have to be mounted in advance and connected in advance to the device with the laminated busbars.

Advantageously, an arched portion projects from a main face or front face of the cover, the air circuit breaker being flanged to the arched portion. The angled tracks which guide the current can be enclosed particularly well by the cover described here, since the upper part and the lower part each have an L-shaped curved face section. In this respect, the arch forms a channel through which the angled track can be guided to the air circuit breaker without touching the track, so that at least the protection class IP20 is ensured.

Advantageously, the switchgear or the low-voltage switchgear comprises a device or a cover of the type described herein. The term low-voltage switchgear is to be understood as an electrical apparatus which operates with low voltage. In the case of alternating current, the low voltage is between 50 and 1000 volts, and in the case of direct current, the low voltage is between 120 and 1500 volts.

Drawings

Shown in the drawings are:

fig. 1 shows a perspective top view of a cover, which has an arch formed by an L-shaped bent plastic part,

figure 2 shows an exploded view of the cover according to figure 1,

FIG. 3 shows a partial view and a detail view of the latching device together with the locking strip, which engages through the locking hole in the tongue, and

fig. 4 shows a device comprising a cover according to fig. 1, a laminated busbar and an air circuit breaker, wherein the cover is mounted between the air circuit breaker and the laminated busbar.

Detailed Description

Fig. 1 shows a cover 1 for the direct electrical connection of components of a switchgear to a busbar. The cover 1 has a base body 2, wherein the base body 2 has four rigid plastic parts which are connected to one another in a form-fitting manner. All plastic parts are made of a material that is transparent or at least partially transparent, i.e. polycarbonate.

The cover comprises four plastic parts, namely only two

side walls

3a, 3b, only one upper part 4a and only one lower part 4b, wherein the two

side walls

3a, 3b are connected with the upper part 4a and the lower part 4b, respectively, by means of a locking device 5. The locking device 5 is formed by means of mechanisms which are configured complementarily to one another at the plastic parts.

Fig. 2 shows, according to an exploded view: each latching device 5 has a tongue 5a and a tab 5b for receiving the tongue 5a, wherein the tongue 5a is formed at the edge of the first plastic part, wherein the tab 5b is formed at the edge of the second plastic part, and wherein the tongue 5a is received in the tab 5b for positively connecting the two plastic parts, i.e. engaging through the tab. Fig. 2 shows: at each

side wall

3a, 3b, six tongues 5a are respectively formed, which can be locked in six tabs 5b associated with the tongues at the upper part 4a and the lower part 4 b. Both the tongue 5a and the tab 5b are arranged at the edge of the plastic part associated therewith.

Fig. 1 and 2 show: the cover 1 comprises four elongated and

flat locking strips

6a, 6b, wherein the four

locking strips

6a, 6b extend between two plastic parts, namely the

side walls

3a, 3b, and engage at each of these two plastic parts through a locking hole 7, which is shown in fig. 3.

Fig. 3 shows: the locking hole 7 is formed in the tongue 5a of the plastic part, here in the tongue 5a of the side wall 3 a. Fig. 3 shows: the tongue 5a of the side wall 3a engages through the tab 5b of the upper part 4a and at the same time the locking strip 6a engages with its free end through the locking hole 7. Thus, the side wall 3a, the upper member 4a and the locking strip 6a are interlaced with each other. Only four

locking strips

6a, 6b are provided.

All figures show: a lattice structure is formed in at least one of the plastic parts, wherein elongated holes 8 are formed in the plastic parts, which are separated from one another by struts 9. No lattice structure is formed in the

side walls

3a, 3 b.

Fig. 4 shows a device comprising a laminated busbar 10, an air circuit breaker 11 and the cover 1 of fig. 1 to 3, wherein the cover 1 surrounds an electrical conductor, not shown, here an angled electrically conductive track, which electrically conductively connects the laminated busbar 10 to the air circuit breaker 11, in a contact-proof manner.

In a particular case, the direct electrical connection is configured as an angled track.

The cover 1 is screwed to the other components of the switchgear by means of the holder 12.

An arch 14 projects from a main surface 13 constituting the front face or front side of the cover 1, and the air circuit breaker 11 is flanged to the arch. The air circuit breaker 11 can be operated from the front side. The air circuit breaker 11 also has a front side facing the user like the main surface 13 from which the dome portion 14 projects. The rear side of the cover 1 faces the laminated bus bar 10.

Two shorter locking strips 6b and two longer locking strips 6a are provided. The cover 1 tapers in the direction of the air circuit breaker 11. Specifically, the arch portion 14 is tapered toward the air circuit breaker 11. Here, the first side wall 3a is configured to extend at a greater angle with respect to the air circuit breaker 11 than the second side wall 3 b.

The arrangement according to fig. 4 is part of a low-voltage switchgear.

The term laminated busbar 10 describes a laminated plate, also known in the technical field as "laminated busbar".

List of reference numerals

1	Covering element
		2	1 base body
3a、3b	2 first and second side walls
		4a
	2 upper part
		4b
	2 lower part
		5	2 of the lock
5a	Tongues at 3a, 3b
		5b

		4a, 4b
6a、6b			Locking bar
	7	5a locking hole
8			4a, 4b
	9	4a, 4b
10			Laminated busbars or laminated plates
	11	Air circuit breaker
12			Holding piece
	13	1 main or front side
14			2 arch part

Claims

1. Cover (1) for the direct electrical connection of components to a busbar (10), characterized in that it has a base body (2), wherein the base body (2) has rigid plastic components which are connected to one another or are connected to one another in a form-fitting manner.

2. The cover according to claim 1, characterized in that at least one plastic part is made of a material which is light-transmitting or at least partially transparent.

3. Cover as claimed in claim 1 or 2, characterized in that at least one plastic part is made of polycarbonate.

4. Cover according to claim 1 or 2, characterized in that the cover (1) comprises four plastic parts, which are two side walls (3a, 3b), an upper part (4a) and a lower part (4b), wherein the side walls (3a, 3b) are connected with the upper part (4a) and/or the lower part (4b), respectively, by means of a latching device (5).

5. The cover according to claim 4, characterised in that the latching device (5) comprises a tongue (5a) and a tab (5b) for receiving the tongue (5a), wherein the tongue (5a) is configured at the edge of a first plastic part, wherein the tab (5b) is configured at the edge of a second plastic part, and wherein the tongue (5a) is received in the tab (5b) for form-fittingly connecting the two plastic parts.

6. Cover according to claim 1 or 2, characterized in that the cover (1) comprises a locking strip (6a, 6b), wherein the locking strip (6a, 6b) extends between the two plastic parts and engages through a locking hole (7) at each of the two plastic parts, respectively.

7. Cover according to claim 5, characterized in that the cover (1) comprises locking strips (6a, 6b), wherein the locking strips (6a, 6b) extend between the two plastic parts and engage through a locking hole (7) respectively at each of the two plastic parts, which locking holes (7) are configured in tongues (5a) of the plastic parts.

8. The cover according to claim 1 or 2, characterised in that a lattice structure is constructed in at least one plastic part and/or that oblong holes (8) are constructed in at least one plastic part, which oblong holes are separated from each other by struts (9).

9. The cover according to claim 4, characterised in that a lattice structure is constructed in at least one plastic part, which lattice structure is not constructed in the side walls (3a, 3 b).

10. The cover according to claim 1, characterised in that said component is an air circuit breaker (11).

11. An electrical device, characterized in that it comprises a laminated busbar (10), an air circuit breaker (11) and a cover (1) according to any one of claims 1 to 10, wherein the cover (1) surrounds a conductor or an angled rail which conductively connects the laminated busbar (10) with the air circuit breaker (11) in a contact-proof manner.

12. An electric device according to claim 11, characterized in that an arch (14) protrudes from the main face (13) of the cover (1), the air circuit breaker (11) being flanged to the arch.

13. A switchgear characterized in that it comprises an electrical device according to claim 11 or 12 or a cover (1) according to any of claims 1 to 10.

14. The switchgear as claimed in claim 13, characterized in that the switchgear is a low voltage switchgear.