A UPS system and mechanical switching arrangement therefor that is driven by an electromechanical actuator when a fault condition is detected thereby opening or closing a switch of the switching arrangement in response thereto within 8 milliseconds, preferably within 4 milliseconds, and more preferably within 2 milliseconds of a fault condition being detected. The UPS system has one switching arrangement for controlling current flow through a utility power path that is switched by an electromechanical actuator and another switching arrangement for controlling that is switched by an electromechanical actuator through an inverter power path that supplies an output-connected load with electrical power should a fault condition occur. The switching arrangements can be driven by a common electromechanical actuator or independent driven by separate electromechanical actuators enabling programmability of a plurality of different UPS system operating modes.

A direct-current (DC) air circuit breaker for opening and closing a circuit according to various embodiments includes a circuit unit having a main circuit, a detecting unit having a detection circuit for detecting a fault current in the main circuit, and a circuit operating device configured to allow connection or isolation between the main circuit and the detection circuit.

A switch assembly includes a switch unit including a button and an arm extending from the button along a height direction, the arm including first and second contact portions spaced apart from each other along a longitudinal direction; and a slider unit extending along a width direction and including a nose to contact the first and second contact portions respectively at first and second engagement positions. The switch assembly provides a reduced need for space and enhanced friendliness in touch and feel.

A switch assembly includes a switch unit including a button and an arm extending from the button along a height direction, the arm including first and second contact portions spaced apart from each other along a longitudinal direction; and a slider unit extending along a width direction and including a nose to contact the first and second contact portions respectively at first and second engagement positions. The switch assembly provides a reduced need for space and enhanced friendliness in touch and feel.

A device having one or more switching mechanisms configured to disconnect a power supply from a load; and one or more disconnector and earthing switches, each disconnector and earthing switch associated with a respective switching mechanism. Each disconnector and earthing switch comprising a telescopic disconnector blade, wherein the disconnector blade is configured to pivot around a first end between three different positions. The three positions comprise: a first position in which the disconnector and earthing switch is closed and the power supply is connected to the load through the disconnector blade; a second, isolation, position in which the disconnector and earthing switch is open and the power supply is disconnected from the load; and a third position in which the power supply is disconnected from the load and a second end of the disconnector blade is electrically connected to an earthing contact.

The present utility model discloses a static and movable plate assembly of a key switch, comprising a static plate and a movable plate, wherein the movable plate and the static plate are contacted or separated under the push of an external force: the movable plate comprises a support arm of the movable plate which is integrally formed and bent twice to the outside of the side; It has a simple structure and reduces the production cost.

A high-voltage earthing switch is disclosed. A static contact of the earthing switch is connected with the first end of a conductive copper busbar. The second end of the conductive copper busbar is connected with a transformer. The conductive copper busbar includes a first segment and a second segment connected with the first segment. The first segment is one straight segment and an end is taken as an end the first end of the conductive copper busbar. The first segment is parallel to the instantaneous action direction of the moving contact when a moving contact engages the static contact. The first segment extends from the static contact in the direction opposite to the instantaneous action direction of the moving contact when the moving contact engages the static contact. The second segment is connected with the other end of the first segment, and extends towards the side of the first segment facing away from the moving contact. The second segment is located at one side of an extended line of one end of the contacting finger connected with the moving contact when the earthing switch switching-on in the direction opposite to the instantaneous action direction at the moment when the moving contact engages the static contact. An electromotive force between the conductive copper busbar and the contacting finger of the earthing switch of the invention may have a positive effect on a switching-on.

A high-voltage earthing switch is disclosed. A static contact of the earthing switch is connected with the first end of a conductive copper busbar. The second end of the conductive copper busbar is connected with a transformer. The conductive copper busbar includes a first segment and a second segment connected with the first segment. The first segment is one straight segment and an end is taken as an end the first end of the conductive copper busbar. The first segment is parallel to the instantaneous action direction of the moving contact when a moving contact engages the static contact. The first segment extends from the static contact in the direction opposite to the instantaneous action direction of the moving contact when the moving contact engages the static contact. The second segment is connected with the other end of the first segment, and extends towards the side of the first segment facing away from the moving contact. The second segment is located at one side of an extended line of one end of the contacting finger connected with the moving contact when the earthing switch switching-on in the direction opposite to the instantaneous action direction at the moment when the moving contact engages the static contact. An electromotive force between the conductive copper busbar and the contacting finger of the earthing switch of the invention may have a positive effect on a switching-on.

A rotary switch device includes a fixed contact point part and a movable contact point part. The movable contact point part is rotated on the fixed contact point part so as to connect and disconnect the fixed contact point part and the movable contact point part. The fixed contact point part and the movable contact point part have contact surfaces which are band shapes and to which corrosion-resistant conductive processing is applied. A transient contact region, in which a contact point is moved from one end portion to the other end portion in a predetermined connection-operation angle from a contact start point with respect to the other of the fixed contact point part and the movable contact point part, is provided on each of the contact surfaces.

The present invention, on the one hand, provides a neodymium iron boron magnet, comprising neodymium iron boron magnet blank and the RTMH alloy layer compounded on the surface; the R is one or more selected from rare earth elements; the T is Fe and/or Co; the M is one or more selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb and Bi; the H is hydrogen element. By the present invention, the coercive force of magnets is significantly enhanced, and at the same time, the original magnetic remanence and maximum magnetic energy product of the magnets are not significantly reduced.