RU142477U1 - ELECTRIC SWITCHING DEVICE FOR LOW VOLTAGE CHAINS - Google Patents

Abstract

1. An electrical switching device (1) for low voltage circuits, comprising a housing (2) having a front wall (3), a rear wall (4), a first side wall (5), a second side wall (6), a lower wall (7 ) and an upper wall (8) that define a volume for containing elements of said switching device, said housing (2) comprising: a first section (21) that defines a first enclosing space for a switching block (20) that contains one or more electrical poles (20A, 20B, 20C), with each of the mentioned ctric poles contains at least one fixed contact and one movable contact connected to each other and disconnected from each other; the second section (22), which defines a second enclosing space for the control mechanism (98) for the movable contacts of the said electric poles; the third section (23), which defines a third enclosing space for one or more accessory devices (91A, 9IB, 91C, 91D) of said switching device; characterized in that said front wall (3) comprises a first shape a walled section (31) and a second molded section (32) configured to appropriately close the enclosing spaces defined by said second and third sections (22, 23) at said front wall (3), said first and second molded sections (31 , 32) are mechanically separable from each other. 2. The electrical switching device according to claim 1, characterized in that the said third section (23) contains the first seats (231A, 231B) and second seats (232A, 232B), which respectively determine the first and second plural

Description

Technical field

The present utility model relates to an electrical switching device, for example, a switch, a disconnector or a contactor, preferably for use in low voltage circuits.

State of the art

As you know, electrical switching devices (abbreviated as “switching devices”) used in low-voltage electrical systems (ie, for applications with operating voltages up to 1000 V AC or 1500 V DC) are devices designed to provide the proper operation of specific parts of electrical systems and the loads operatively associated with them.

The switching device typically comprises a switching unit provided with one or more poles.

Each electric pole contains at least one fixed contact and a corresponding movable contact, electrically connected to the respective terminals for connection with the linear wires of the electric line.

A suitable control means allows moving movable contacts to be connected to and disconnected from respective fixed contacts.

The movement of the movable contacts in the switching device can be determined by manual operation of the operator or by the operation of the protection and control unit (i.e., an electronic relay), which, if provided, is operatively connected to the switching unit.

The switching device may be equipped with auxiliary devices, such as the aforementioned protection and control unit, the main function of which is to regulate the operation of the switching unit in accordance with functions that are predetermined or specified by the operator by means of suitable user interface means.

Moreover, the switching device can also be equipped with various components that are operatively connected with the switching unit to perform predetermined functions, for example, auxiliary contacts, contacts for signaling the status of the switching device (open, closed), actuators of the spring plant, electromagnetic triggers, sensors and similar devices.

Known switching devices have several problems.

As you know, they contain a housing, inside which various sections are defined to accommodate a switching unit, a control mechanism, any control protection unit and any component devices.

In the General case, the front wall of the housing is located so that it has one closing panel for the accommodating spaces, designed to accommodate the control mechanism and accessories.

Therefore, it is necessary to remove this cover panel to carry out any operation that requires access to the enclosing spaces of the control mechanism or accessories.

Therefore, access to the control mechanism of the switching unit is obtained each time by removing this cover panel for every reason and also performing normal maintenance operations (in general, carried out by unskilled personnel), for example, to install the accessory device in the enclosing space reserved for it.

Obviously, this causes problems that deserve attention in connection with the operation and safety of the switching device.

Utility Model Summary

The objective of this utility model is to develop an electrical switching device for low voltage electrical circuits having structural elements improved in relation to known devices.

In particular, this model aims to develop an electrical switching device that is simple to operate and guarantees relatively high levels of safety.

An additional objective of this model is to provide an electrical switching device, which is relatively easy to manufacture at a comparable cost.

These problems are solved by means of an electric switching device corresponding to the attached utility model formula and the following description.

Brief Description of the Drawings

Additional features and advantages of the electrical switching device in accordance with this model will become apparent from the description of the preferred - but not exclusive - embodiments of the switching device in accordance with this utility model, illustrated by way of example in the accompanying drawings, wherein:

figure 1 is a General view of a variant of implementation of the switching device, in accordance with this utility model;

FIG. 2-6 are perspective views in partially exploded form of an electrical switching device according to FIG. 1.

Description of Preferred Embodiments

Turning to the above drawings, we note that the electric switching device 1 (hereinafter referred to as the "switching device 1") comprises a housing 2 of substantially prismatic shape provided with a front wall 3, a rear wall 4, a first side wall 5, a second side wall 6, bottom wall 7 and upper wall 8.

Walls 3, 4 are in mutually opposite positions with respect to switching device 1, as are a pair of side walls 5, 6, as well as a pair of lower and upper walls 7, 8.

The walls 3, 4, 5, 6, 7, 8 of the housing 2 determine the volume for containing the elements of the switching device 1.

The switching device 1 may be a fixed or removable type device.

In the first case, the housing 2 is attached to the supporting structure (for example, distribution board) by the rear wall 4 and / or side walls 5, 6.

In the second case, the housing 2 is operatively connected by the side walls 5, 6 with an additional supporting housing, which, in turn, is attached to the supporting structure (for example, a distribution panel). Thanks to actuators with a manual or electric drive, the switching device 1 can be moved between the “inserted” position - in the aforementioned additional housing, in which it is electrically connected to the electric line, and the position “removed” from the said additional housing, in which it is electrically disconnected from the above electric line.

Naturally, in both considered configurations, the switching device 1 is positioned so that the rear wall 4 faces the supporting structure, and the front wall 3 is free and easily accessible to the operator.

The housing 2 of the switching device 1 comprises a first section 21, which defines a first enclosing space for the switching unit 20.

The switching unit 20 contains one or more electrical poles 20A, 20B, 20C, each of which contains at least one fixed contact and one movable contact (not shown), connected to each other and disconnected from each other, inside the corresponding arcing chamber (not shown).

The movement of the movable contacts of the switching unit 20 takes place mainly due to the control mechanism 98, operatively associated with them. The switching unit 20 is advantageously provided with electrical terminals 250 for electrical connection to the line wires of the electrical line. Preferably, the electrical terminals 250 protrude from the rear wall 4 of the housing 2.

Section 21 of the housing 2 preferably contains one or more insulating partitions (not shown) configured to determine locations for the electrical poles 20A, 20B, 20C and to provide optimal electrical insulation between them.

The housing 2 contains a second section 22, which defines a second enclosing space for the control mechanism 98, operatively associated with the movable contacts of the electric poles 20A, 20B, 20C.

The housing 2 also includes a third section 23, which defines a third enclosing housing space for one or more accessory devices 91A, 91B, 91C, 91D, operatively connected to the elements of the switching device 1.

The housing 2 preferably also includes a fourth section 24, which defines a fourth enclosing space for the protection and control unit 99 of the switching device 1.

The presence of block 99 protection and control depends essentially on the method of use of the switching device 1.

When it is used as an electric line disconnector, the protection and control unit 99 will be absent, and the enclosing space defined by section 24 of the housing 2 will remain substantially empty.

The housing 2 preferably also comprises a fifth section 25, which defines a fifth enclosing space for the manual control lever 97 (spring winding lever) operatively associated with the control mechanism 98.

As for the usual vertical installation of the switching device 1, the section 21 of the housing 2 is operatively located near the rear wall 4 between the lower and upper walls 7 and 8, and the sections 22, 23, 24, 25 are located near the front wall 3.

Sections 22, 23 are preferably located in a position remote from the upper wall 8 of the housing 2, and section 24 is located near this last above sections 21, 22, 23, 25.

Section 22 of the housing 2 is preferably located in the central region of the front wall 3, and section 23 is located near at least one of the side walls 5, 6.

Section 23 is preferably divided into two separate compartments, each of which is located near the side wall 5, 6.

In the first compartment, section 23 mainly contains the first seats 231A, 231B located near the side wall 5. The first seats 231A, 231B define the first set of third accommodating spaces for some components, for example, for a spring factory electric motor 91A and one or several auxiliary contacts 91B.

In the second compartment, section 23 advantageously comprises second seats 232A, 232B located near the side wall 6. Second seats 232A, 232B define a second set of third accommodating spaces for additional accessories, for example, for a plurality of signal contacts 91C or a plurality of triggers 91D devices.

The described working arrangement of sections 21, 22, 23, 24, 25 of the housing 2 provides optimization of the enclosing space intended for the elements of the switching device 1, in particular the enclosing space intended for the accessories 91A, 91B, 91C, 91D and for the protection unit 99 and management.

Therefore, the switching device 1 has a compact design, in particular with limited dimensions. In accordance with this utility model, the front wall 3 comprises a first molded portion 31 and a second molded portion 32 configured to appropriately close — on the same front wall — housing cavities delimited by sections 22, 23 of housing 2.

In accordance with this model, the molded sections 31, 32 of the front wall 3 are mechanically separable from each other.

The shaped sections 31, 32 are advantageously removable from the front wall 3, providing access to the enclosing space defined by sections 22, 23 of the housing 2.

The molded portion 32 is preferably adapted to be removed from the front wall 3 separately with respect to the molded portion 31.

The shaped sections 31, 32 are preferably mechanically connected to each other so that they can be removed individually from the front wall 3, in accordance with a predetermined sequence. In particular, the molded sections 31, 32 are mechanically connected to each other so that the said molded section 31 can be removed from the front wall 3 only after the molded section 32 is removed.

The molded portion 31 is preferably formed by a lid that can be detachably connected to the structural component of the control mechanism 98 (for example, a support bracket) by means of known fastening means, for example, by means of screws or by means of interlocking or latched mechanical fastening connections or the like compounds.

The cover 31 preferably comprises a first opening 51 configured to provide direct access to the enclosing space defined by the fifth section 25 of the housing 2.

Therefore, the operator can easily engage the control lever 97 manually, without needing to remove parts of the front wall 3.

The cover 31 preferably comprises second openings 52 configured to receive control buttons 55, which advantageously protrude from the front wall 3. The control buttons 55 are operatively connected, for example, to the control mechanism 98 and allow the operator to control the operation of this mechanism without removing the front part walls 3.

The second apertures 52 can also be configured to accommodate signal indicators 56, which allow the operator to easily obtain information about the operating state of the switching device without removing parts of the front wall 3.

The molded portion 32 preferably comprises a molded frame 325 that defines, at least in part, the edges of the same front wall.

The molded portion 32 preferably comprises first and second cover panels 321, 322 connected integrally with the molded frame 325.

The cover panels 321, 322 are advantageously positioned so as to enclose the accommodating spaces (intended to accommodate components 91A, 92B, 91C, 91D), respectively defined by the seats 231A, 231B, 232A, 232B of section 23 of the housing 2.

From the foregoing, it is apparent that the molded portion 32 is predominantly constituted by a closure structure comprising at least a molded frame 325 and cover panels 321, 322 that can be detachably connected to the front wall 3 using fasteners of a known type, for example, screws or using interlocking or snap-in mechanical fasteners or similar joints.

As shown above, the molded portion 32 is removable from the front wall 3 independently of the molded portion 31.

For this purpose, the molded frame 325 and the cover panels 321, 322 are arranged so as to define an opening 324, within which a cover 31 of the front wall 3 is located when it is in its normal operating position.

The lower span 325A of the molded frame 325 is preferably mechanically connected to the corresponding lower teeth 310 of the cover 31, so that it can only be removed from the front wall 3 after removing the molded frame 325.

The second molded portion 32 of the front wall 3 preferably comprises a third cover panel 323 that can be detachably connected to the molded frame 325 using fasteners of a known type, for example, with screws or with interlocking or snap-on mechanical fasteners or similar joints.

The cover panel 323 is advantageously positioned so as to close the enclosing space (intended to receive the protection and control unit 99) defined by section 24 of the housing 2.

As shown by FIG. 2, when the protection and control unit 99 is enclosed in an enclosing space defined by section 24 of the housing 2, this unit is accessed through an opening 326 limited by a lid 31, cover panels 321, 322 and a molded frame 325.

The opening 326 is closed by a cover panel 323 when the latter is operatively connected to the molded frame 325.

In accordance with some variants of the implementation of this model, the cover panel 323 can be positioned so that it will support electronic means of the user interface (not shown), operatively connected with the possibility of removal with the block 99 of protection and control.

In a preferred embodiment, these electronic means may include a display configured to provide easy viewing and selection of input or output data from the protection and control unit, an additional control unit, and one or more communication ports, for example, USB connectors (Universal Serial Bus) )

The upper wall 8 is preferably shaped so that it has a seat 81 of an electrical terminal box 80 located between the switching unit 20 and the protection and control unit 99 and electrically connected to the latter.

Thanks to the terminal box 80, the switching unit 20 and / or the protection and control unit 99 can exchange information signals and / or control signals with devices outside the switching device 1 and / or receive autonomous power supply.

Additional interesting aspects of the switching device, in accordance with this model, relate to the operational positioning of component devices 91A, 91B, 91C, 91D on the respective seats 231A, 231B, 232A, 232B of the housing available in section 23 of the housing 2.

Component devices 91A, 91B, 91C, 91D are preferably positioned quickly, according to installation models, plug and play or snap into their respective seats 231A, 231B, 232A, 232B.

This definition means that the accessories 91A, 91B, 91C, 91D can be mounted simply by inserting them into the aforementioned seats 231A, 231B, 232A, 232B and without the need for additional electrical or mechanical connections.

To this end, the triggers 91D preferably comprise first molded edges 901 intended to be mechanically connected (by means of interlocking or snap fastening) to respective second molded edges 2321 formed in the walls of the respective housing seats 232B of the housing, and first electrical contacts 902 for electrical connections - in accordance with the “socket-plug” mode or vice versa - with the corresponding electrical contacts 2322, located on the corresponding vuyuschih seats of the housing 232B.

Similarly, auxiliary contacts 91B may advantageously comprise third molded edges 903 intended to be mechanically connected (by means of interlocking or snap fastening) to respective fourth molded edges 2311 formed in the walls of the corresponding housing seat 231B, and electrical connectors 904 to form the part terminal box 80.

In order to facilitate its installation on the corresponding seat 321A, the spring factory electric motor 91A may advantageously comprise a connecting pin 905 intended for mechanical connection (by means of a deadlock or snap fastening) with a centering bracket 2313 located on the corresponding housing seat 231A, and a molded connecting section 906 intended for mechanical connection using suitable fastening means (such as a screw) with a supporting wall 2312, which og borders the housing seat for the 91A motor. Inside the housing seat 231A of the housing, which is intended for the electric motor 91A, preferably, the drive shaft 980 of the control mechanism 98 protrudes to connect with this seat on its molded wall 907.

Preferably, one or more locking caps 96 can be operatively connected to the housing seats 231A, 231B, 232A, 232B to maintain one or more accessory devices 91A, 91B, 91C, 91D in their working position.

For example, one or more of the locking covers 96 may be operatively associated with seats 232B designed to receive the triggers 91D.

These locking covers are advantageously adapted to be reversibly moved between the locking position and the lowering position of said triggers.

The switching device 1, in accordance with this utility model, has noteworthy advantages in the context of efficiency and ease of use with respect to known devices.

The front wall 3 of the housing 2, mainly has a substantially modular design, which greatly simplifies access to each of the enclosing spaces bounded by sections 22, 23, 24 of the housing 2.

In order to gain access to the body cavity (section 24 of the body 2) for enclosing the protection and control unit 99 therein, the operator can simply remove the cover panel 323 from the molded frame 325 without removing the remaining parts of the front wall 3, in particular the cover 31.

In order to gain access to the enclosing space (section 23 of the housing 2) for receiving the components 91A, 91B, 91C, 91D, the operator can remove the cover structure formed by the molded frame 325, the cover panels 321, 322 and, optionally, 323, again without removing cover 31.

To gain access to the enclosing space (section 22 of the housing 2), designed to accommodate the control mechanism 98, the operator can remove the cover 31 of the front wall 3, mainly after removing also the cover panels 321, 322, 323.

Obviously, this modular design of the front wall 3 makes it possible to keep isolated those accommodating spaces into which the operator is not going to or should not gain access.

Thus, access to various enclosing spaces can be selectively controlled depending on the type of operation being performed, with a significant increase in compliance with safety standards.

Access to the enclosing spaces (sections 23, 24 of housing 2), designed to accommodate components 91A, 91B, 91C, 91D and the protection and control unit 99, for the purpose of carrying out normal maintenance operations, is acceptable for both qualified and unqualified personnel.

In contrast, access to the enclosing space (section 22 of the housing 2), designed to accommodate the control mechanism 98, with the aim of conducting emergency maintenance operations is allowed only to qualified personnel.

Based on the foregoing, it is obvious that the switching device 1 is easy to operate and guarantees relatively high levels of security.

The switching device 1 has a relatively simple design and is relatively simple and inexpensive to manufacture on an industrial level.

Claims (16)

1. An electrical switching device (1) for low voltage circuits, comprising a housing (2) having a front wall (3), a rear wall (4), a first side wall (5), a second side wall (6), a lower wall (7 ) and the upper wall (8), which determine the volume for containing the elements of said switching device, said housing (2) comprising: the first section (21), which defines the first enclosing space for the switching unit (20), which contains one or more electric poles (20A, 20B, 20C), each of these electric poles containing at least one fixed contact and one movable contact connected to each other and disconnected from each other; a second section (22), which defines a second enclosing space for the control mechanism (98) for the movable contacts of said electric poles; a third section (23) that defines a third enclosing space for one or more accessory devices (91A, 9IB, 91C, 91D) of said switching device; characterized in that said front wall (3) comprises a first molded section (31) and a second molded section (32) configured to appropriately close the enclosing spaces defined by said second and third sections (22, 23) at said front wall ( 3), wherein said first and second molded sections (31, 32) are mechanically separable from each other.             2. An electric switching device according to claim 1, characterized in that said third section (23) comprises first seats (231A, 231B) and second seats (232A, 232B), which respectively define the first and second plurality of third containing spaces for said component devices (91A, 91B, 91C, 91D), wherein the second molded portion (32) comprises a molded frame (325) that defines, at least in part, the edges of said front wall (3), and the first and second closing panels (321, 322), combined with Uta molded frame (325) and configured to close the accommodating spaces respectively defined by said first and second seatings (231A, 231B, 232A, 232B). 3. An electric switching device according to claim 2, characterized in that said housing (2) comprises a fourth section (24), which defines a fourth enclosing space for the protection and control unit (99) of said switching device, said second molded section (32 ) is configured to close the enclosing space defined by said fourth section (24) at said front wall (3). 4. An electric switching device according to claim 2, characterized in that said second molded portion (32) comprises a third closing panel (323) removably connected to said molded frame (325) and configured to close the enclosing space defined by said the fourth section (24).            5. An electric switching device according to any one of claims 1 to 4, characterized in that said first molded portion (31) comprises a cover removably connected to said control mechanism (98). 6. An electric switching device according to any one of claims 1 to 4, characterized in that said second molded portion (32) is removable from said front wall (3) separately with respect to said first molded portion (31). 7. An electrical switching device according to claim 6, characterized in that said first molded section (31) and said second molded section (32) are mechanically connected to each other so that said first molded section (31) is removable from the front wall ( 3) only after the mentioned second molded portion (32) is removed. 8. An electric switching device according to claim 2 or 7, characterized in that said cover (31) is mechanically connected to said molded frame (325) so that it can be removed from said front wall (3) only after said molded frame (325). 9. An electric switching device according to any one of claims 1 to 4, 7, characterized in that said housing (2) comprises a fifth section (25), which defines a fifth enclosing space for a manual control lever (97) operatively associated with said control mechanism (98). 10. An electrical switching device according to claim 5, characterized in that said cover (31) comprises a first opening (51) configured to provide direct access to the enclosing space defined by said fifth section (25). 11. An electric switching device according to claim 5, characterized in that said cover (31) comprises second openings (52) configured to receive control buttons (55) or signal indicators (56) of said switching device. 12. The electrical switching device according to claim 2, characterized in that one or more of the aforementioned component devices (91A, 91B, 91C, 91D) are operatively positioned on said first seats (231A, 231B) and / or on said second seats (232A, 232B) according to installation modes such as plug and play or snap-on. 13. An electric switching device according to claim 2 or 12, characterized in that one or more of the locking covers (96) are operatively connected to one or more of the first seats (231A, 231B) and / or one or more of the second seats (232A, 232B) for maintaining in position one or more of the aforementioned component devices (91A, 91B, 91C, 91D). 14. An electric switching device according to any one of claims 1 to 4, 7, 10, 11, 12, characterized in that it is a fixed type device. 15. The electric switching device according to any one of claims 1 to 4, 7, 10, 11, 12, characterized in that it is a recoverable type device. 16. The electric switching device according to any one of claims 1 to 4, 7, 10, 11, 12, characterized in that it is a switch, disconnector or contactor.

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