US 11,688,571 B2Granted

Electrical switch

AssigneeABB Schweiz AG

InventorsJuuso Lilja, Jarmo Lehtimäki

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Abstract

An electrical switch including a frame, a first stationary contact, a second stationary contact, a roll element and a movable contact mounted to the roll element. The roll element is rotatable around a rotation axis between a first position and a second position relative to the frame. The movable contact includes a first contact portion and a second contact portion. In the first position of the roll element, the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first stationary contact is electrically disconnected from the second stationary contact. The first in contact portion and the second contact portion are located on opposite sides of a centre plane perpendicular to the rotation axis.

Claims19

Dependent claims

An electrical switch comprising:

a frame;
a first stationary contact stationary mounted relative to the frame;
a second stationary contact stationary mounted relative to the frame;
a roll element rotatable around a rotation axis between a first position and a second position relative to the frame, wherein the roll element is adapted to transfer from the first position to the second position in an opening event;
and
a movable contact mounted to the roll element, and including a first contact portion and a second contact portion, wherein in the first position of the roll element the first contact portion is in a first position of the first contact portion in which the first contact portion is in contact with the first stationary contact, and the second contact portion is in a first position of the second contact portion in which the second contact portion is in contact with the second stationary contact such that the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first contact portion and second contact portion are in their respective second positions such that the first stationary contact is electrically disconnected from the second stationary contact, wherein there is a first breaking zone between the first stationary contact and the second position of the first contact portion, and a second breaking zone between the second stationary contact and the second position of the second contact portion,
wherein the first contact portion and the second contact portion are located on opposite sides of a center plane perpendicular to the rotation axis,
wherein the movable contact is made of electrically conducting material such that the first contact portion and the second contact portion are electrically conductively connected,
wherein the electrical switch comprises an isolator system electrically isolating the first breaking zone from the second breaking zone, the center plane passing through the isolator system,
wherein the isolator system is adapted to prevent transfer of electrical arcs from one side of the isolator system to the other during the opening event of the electrical switch.

7 more elements

An electrical switch comprising:

a frame;
a first stationary contact stationary mounted relative to the frame;
a second stationary contact stationary mounted relative to the frame;
a roll element rotatable around a rotation axis between a first position and a second position relative to the frame, wherein the roll element is adapted to transfer from the first position to the second position in an opening event;
and
a movable contact mounted to the roll element, and including a first contact portion and a second contact portion, wherein in the first position of the roll element the first contact portion is in a first position of the first contact portion in which the first contact portion is in contact with the first stationary contact, and the second contact portion is in a first position of the second contact portion in which the second contact portion is in contact with the second stationary contact such that the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first contact portion and second contact portion are in their respective second positions such that the first stationary contact is electrically disconnected from the second stationary contact, wherein there is a first breaking zone between the first stationary contact and the second position of the first contact portion, and a second breaking zone between the second stationary contact and the second position of the second contact portion,
wherein the first contact portion and the second contact portion are located on opposite sides of a center plane perpendicular to the rotation axis, and
wherein a rotation angle between the first position and the second position of the roll element is greater than or equal to 180°.

5 more elements

An electrical switch comprising:

a frame;
a first stationary contact stationary mounted relative to the frame;
a second stationary contact stationary mounted relative to the frame;
a roll element rotatable around a rotation axis between a first position and a second position relative to the frame, wherein the roll element is adapted to transfer from the first position to the second position in an opening event;
and
a movable contact mounted to the roll element, and including a first contact portion and a second contact portion, wherein in the first position of the roll element the first contact portion is in a first position of the first contact portion in which the first contact portion is in contact with the first stationary contact, and the second contact portion is in a first position of the second contact portion in which the second contact portion is in contact with the second stationary contact such that the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first contact portion and second contact portion are in their respective second positions such that the first stationary contact is electrically disconnected from the second stationary contact, wherein there is a first breaking zone between the first stationary contact and the second position of the first contact portion, and a second breaking zone between the second stationary contact and the second position of the second contact portion,
wherein the first contact portion and the second contact portion are located on opposite sides of a center plane perpendicular to the rotation axis,
wherein the electrical switch comprises an isolator system electrically isolating the first breaking zone from the second breaking zone, the center plane passing through the isolator system, and
wherein a projection of an outline of the isolator system delimits on the center plane an area larger than a circle whose diameter is equal to a distance between a free end of the first contact portion and a free end of the second contact portion.

6 more elements

Dependencies are inferred from the claim text.