Switching device

FIELD: electrical engineering.

SUBSTANCE: invention relates to low-voltage switching device (1) containing multiple arc-quenching chambers (10). Each of said arc-quenching chambers (10) covers unit (60) of contacts closure, comprising fixed contact (30, 30′) and movable contact (20), and arches are formed when movable contact is detached from fixed contact. Each arc-quenching chamber comprises multiple U-shaped arc-quenching plates (40), adapted for arc separation, direction and cooling, formed between contacts (30, 30′, 20), and side walls (12), containing guide device (14) for directing branches (42) of arc-quenching plates. Guide device (14) contains multiple supporting plates (16), arranged to extend to inner part of arc-quenching chamber for receiving branches (42) of arc-quenching plates and to ensure electrical insulation between two adjacent arc-quenching plates (40).

EFFECT: technical result is creation of low-voltage switching device, made with possibility to direct arc-quenching plates in arc-extinguishing chamber with prevention of damage of branches of arc-quenching plates, caused by arcs.

3 cl, 3 dwg

 



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention is referred to unidirectional direct-current contactor with double disconnection having two contact pads, each pad is equipped with one fixed contact and one movable contact, at that the movable contacts are placed at a jumper and at disconnection of the contact pads a switching electric arc is formed at each of them, and an electric arc quencher and a displacing device for displacement of at least one switching electric arc from the respective contact pad. The shunting guard is placed close to the movable contact of the first contact pad; the jumper and the shunting guard are insulated from each other; the shunting guard is connected by potential to the fixed contact of the second contact pad so that at the first contact pad by displacement made by the displacing device the first switching electric arc jumps from the jumper to the shunting guard.

EFFECT: providing small dimensions and low costs for manufacturing of the device.

10 cl, 1 dwg

Low-voltage switch // 2505876

FIELD: electricity.

SUBSTANCE: low-voltage switch has a housing which holds at least one fixed contact and a movable contact which is engaged and disengaged with the fixed contact, a drive mechanism operably connected to the movable contact, at least first and second terminals electrically connected to the fixed contact and the movable contact, respectively, and an arc chamber placed between the fixed contact and a conducting element, having a first end which is electrically connected to the second terminal and a second end which ends with the lower side. The arc chamber has multiple moulded conducting plates which are inserted between the fixed contact and the second end of the conducting element, and a main part having a second insulating housing which holds an element made of ferromagnetic material. The main part is placed adjacent to the multiple moulded conducting plates and defines the space for passage of the movable contact as it moves between the closed position and the open position.

EFFECT: making a switch which, with a relatively simple design, provides highly effective cutting of overload current owing to sufficient rate of opening and control of the electric arc.

11 cl, 4 dwg

Switching device // 2502147

FIELD: radio engineering, communication.

SUBSTANCE: switching device has at least one input terminal and at least one output terminal (3) for connecting electric conductors, as well as a first switching contact and a second switching contact. The switching contacts in the closed position close the current circuit between the input terminal and the output terminal (3). A circuit breaker is provided for opening the first switching contact and the second switching contact. In the zone of the switching contacts, there is at least one arc-extinguishing chamber (9) which holds a given number of metal plates (10). In order to achieve high reliability and safety during operation even after repeated disconnection, the invention proposes adjoining at least two metal plates (10) through separate areas.

EFFECT: high reliability and safety of operation.

12 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: arc-extinguishing system includes movable contact, fixed contact and insulating housing. Insulating housing is made in the form of hollow pipe with slots made on inner surface and located at intervals along the whole housing. Metal magnetic inserts are located in each slot, and magnetic blow device for creation of longitudinal magnetic field is installed on fixed contact.

EFFECT: increasing the drop of voltage on the arc, increasing heat release from electric arc to the environment owing to its being rotated between slots of the housing, and decreasing the influence of exhaust gases on inner surface of the housing.

2 dwg

FIELD: electricity.

SUBSTANCE: arc-extinguishing system includes movable contact, fixed contact and insulating housing. Insulating housing is made in the form of hollow pipe with slots made on inner surface and located at intervals along the whole housing. Metal magnetic inserts are located in each slot, and magnetic blow device for creation of longitudinal magnetic field is installed on fixed contact.

EFFECT: increasing the drop of voltage on the arc, increasing heat release from electric arc to the environment owing to its being rotated between slots of the housing, and decreasing the influence of exhaust gases on inner surface of the housing.

2 dwg

Switching device // 2502147

FIELD: radio engineering, communication.

SUBSTANCE: switching device has at least one input terminal and at least one output terminal (3) for connecting electric conductors, as well as a first switching contact and a second switching contact. The switching contacts in the closed position close the current circuit between the input terminal and the output terminal (3). A circuit breaker is provided for opening the first switching contact and the second switching contact. In the zone of the switching contacts, there is at least one arc-extinguishing chamber (9) which holds a given number of metal plates (10). In order to achieve high reliability and safety during operation even after repeated disconnection, the invention proposes adjoining at least two metal plates (10) through separate areas.

EFFECT: high reliability and safety of operation.

12 cl, 2 dwg

Low-voltage switch // 2505876

FIELD: electricity.

SUBSTANCE: low-voltage switch has a housing which holds at least one fixed contact and a movable contact which is engaged and disengaged with the fixed contact, a drive mechanism operably connected to the movable contact, at least first and second terminals electrically connected to the fixed contact and the movable contact, respectively, and an arc chamber placed between the fixed contact and a conducting element, having a first end which is electrically connected to the second terminal and a second end which ends with the lower side. The arc chamber has multiple moulded conducting plates which are inserted between the fixed contact and the second end of the conducting element, and a main part having a second insulating housing which holds an element made of ferromagnetic material. The main part is placed adjacent to the multiple moulded conducting plates and defines the space for passage of the movable contact as it moves between the closed position and the open position.

EFFECT: making a switch which, with a relatively simple design, provides highly effective cutting of overload current owing to sufficient rate of opening and control of the electric arc.

11 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention is referred to unidirectional direct-current contactor with double disconnection having two contact pads, each pad is equipped with one fixed contact and one movable contact, at that the movable contacts are placed at a jumper and at disconnection of the contact pads a switching electric arc is formed at each of them, and an electric arc quencher and a displacing device for displacement of at least one switching electric arc from the respective contact pad. The shunting guard is placed close to the movable contact of the first contact pad; the jumper and the shunting guard are insulated from each other; the shunting guard is connected by potential to the fixed contact of the second contact pad so that at the first contact pad by displacement made by the displacing device the first switching electric arc jumps from the jumper to the shunting guard.

EFFECT: providing small dimensions and low costs for manufacturing of the device.

10 cl, 1 dwg

Switching system // 2570169

FIELD: electricity.

SUBSTANCE: invention is related to switching system (1) for relays or contactor switch, which is comprised of a contact bridge (5) placed between two contacts (4a, 4b) so that it can rotate around the axis (6). Besides, the switching system (1) comprises a magnet element (15) that generates magnetic filed (28) parallel to the rotation axis (6) of the contact bridge (5) in order to force out electric arc occurring at open contacts (4a, 4b) to arc-quenching chamber (16).

EFFECT: improved efficiency of the switching system at voltage of 450 V and at passage and interruption of current of 250 A.

12 cl, 5 dwg

Switching device // 2599384

FIELD: electrical engineering.

SUBSTANCE: invention relates to low-voltage switching device (1) containing multiple arc-quenching chambers (10). Each of said arc-quenching chambers (10) covers unit (60) of contacts closure, comprising fixed contact (30, 30′) and movable contact (20), and arches are formed when movable contact is detached from fixed contact. Each arc-quenching chamber comprises multiple U-shaped arc-quenching plates (40), adapted for arc separation, direction and cooling, formed between contacts (30, 30′, 20), and side walls (12), containing guide device (14) for directing branches (42) of arc-quenching plates. Guide device (14) contains multiple supporting plates (16), arranged to extend to inner part of arc-quenching chamber for receiving branches (42) of arc-quenching plates and to ensure electrical insulation between two adjacent arc-quenching plates (40).

EFFECT: technical result is creation of low-voltage switching device, made with possibility to direct arc-quenching plates in arc-extinguishing chamber with prevention of damage of branches of arc-quenching plates, caused by arcs.

3 cl, 3 dwg

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