The present invention provides an arc chute, which can be provided to make close contact with a curved frame part, and a load switch comprising same, the arc chute comprising: two cover parts, which are arranged to be adjacent to the outer circumference of a frame part, are spaced apart from each other, and overlap each other in the axial direction of the frame part; and an arc grid which is arranged between the two cover parts so as to be coupled to each of the two cover parts, wherein the cover part is formed in a shape in which one side coming into contact with the outer circumference of the frame part corresponds to the outer circumference of the frame part.

The present disclosure provides a gas-insulated vacuum load break switch, including a high-voltage conductive loop having three phases independent from each other and of the same design, a control operating mechanism, a support box and a transmission apparatus. Each phase of the high-voltage conductive loop includes a load break switch unit with a vacuum interrupter, an isolating switch unit with an isolator, a plastic housing supporting the load break switch unit and the isolating switch unit, and an earthing switch unit; the control operating mechanism includes an operating mechanism for controlling the load break switch unit, an operating rod for controlling the isolating switch unit, and an operating mechanism for controlling the earthing switch unit.

A service plug has a main connector (30 with two plate-like terminals (32) having coplanar plate surfaces, an accommodating portion (34) having the plate-like terminals (32) therein, and a first connecting portion (36, 38) having first connection terminals to connect the plate-like terminals (32) together by being inserted into the accommodating portion (34). A detection connector (40) includes a detection housing (44) with two detection terminals (42) inside. A second connecting portion (46) has a second connection terminal and is movable between an engaged position where the second connecting portion is engaged with the detection housing (44) and the second connection terminal connects the detection terminals (42) to each other and a non-engaged position where the second connecting portion does not engage the detection housing (44) by sliding within a width range of the first connecting portion (36, 38) along the surfaces of the plate-like terminals (32).

A current-interrupter device (1) comprising a circuit breaker (2) including a first stationary conductive support (4) carrying both a stationary arcing contact (14) and a movable arcing contact (16), and also carrying a movable permanent contact (17), the movable arcing contact (16) and the movable permanent contact (17) being electrically connected to the first stationary support (4), and a disconnector (3) including a second stationary conductive support (6) carrying a disconnector contact (18), and wherein: the movable disconnector contact (18) is in contact with the stationary arcing contact (14) when it is closed and spaced apart from the stationary arcing contact (14) when it is open; and the movable disconnector contact (18) and the movable permanent contact (17) are connected to each other when they are both in the closed position, and they are spaced apart from each other when one or the other is open.

A gas-insulated circuit breaker is disclosed that includes a housing defining a gas volume for a dielectric gas; a nominal contact system and an interruption contact system with a pin and a tulip that they are electrically connectable to and disconnectable from one another along an axis. The circuit breaker includes a guiding assembly including a guide sleeve and a guiding member that is coupled to the pin; and a gas damping assembly configured to damp a breaking movement of the pin by compressing the dielectric gas in an absorber volume. A movable absorption element and the absorber volume are arranged radially inward of the guide sleeve.

Device, circuit, system, and method for arc suppression. A contact separation detector is configured to output an indication of a separation state of a pair of electrical contacts. A contact bypass circuit, coupled to the contact separation detector, is configured to provide an electrical bypass between the pair of contacts based on the indication.

A service plug has a main connector (30 with two plate-like terminals (32) having coplanar plate surfaces, an accommodating portion (34) having the plate-like terminals (32) therein, and a first connecting portion (36, 38) having first connection terminals to connect the plate-like terminals (32) together by being inserted into the accommodating portion (34). A detection connector (40) includes a detection housing (44) with two detection terminals (42) inside. A second connecting portion (46) has a second connection terminal and is movable between an engaged position where the second connecting portion is engaged with the detection housing (44) and the second connection terminal connects the detection terminals (42) to each other and a non-engaged position where the second connecting portion does not engage the detection housing (44) by sliding within a width range of the first connecting portion (36, 38) along the surfaces of the plate-like terminals (32).

A five-prevention interlocking pole type high-voltage switchgear includes a pole bracket, embedded poles, and spring and earthing isolated switch operating mechanisms; every three poles are arranged in a row on the bracket, the spring operating mechanism is joined with the switch operating mechanism through the chamber door interlocking piece and mechanism interlocking piece; the chamber interlocking piece, mechanism interlocking piece and door lock plate are joined, the door lock plate is opposite the opening semi-axis pinch plate in the spring operating mechanism and the door lock plate is set with a door lock pin. Chamber interlocking piece movement is used to open or close the switch operating mechanism crank operation hole and corresponds to the start of close brake operation and limit brake of opening pinch plate in the spring operating mechanism and the limiting and opening of the opening semi-axis and cable chamber door in the spring operating mechanism.

An interlock apparatus of a ring main unit is provided. The interlock apparatus of the ring main unit may change a rotational motion of the shaft included in the circuit breaker to a rectilinear motion, and thus, the insertion hole may be opened or closed according to a closed or cutoff state of the circuit breaker. Accordingly, in the closed state of the circuit breaker, the control of a state of the disconnector is prevented.

An interlock apparatus of a ring main unit is provided. The interlock apparatus of the ring main unit may change a rotational motion of the shaft included in the circuit breaker to a rectilinear motion, and thus, the insertion hole may be opened or closed according to a closed or cutoff state of the circuit breaker. Accordingly, in the closed state of the circuit breaker, the control of a state of the disconnector is prevented.