Disclosed herein is an MEMS variable capacitor and its driving method, the MEMS variable capacitor including, a first electrode, a second electrode floating over the first electrode upper part, a fixed electrode separated at the second electrode side surface, and a drifting electrode placed between the second electrode and the fixed electrode, connected to the second electrode, and physically contacting the fixed electrode by a voltage applied to the fixed electrode.

An electrical switching apparatus includes a housing, a line terminal, a load terminal, separable contacts disposed on a conductive path between the line terminal and the load terminal, an operating mechanism structured to open and close said separable contacts, said operating mechanism including a trip bar, and an electronic trip unit. The electrical switching apparatus also includes a trip actuator assembly including an actuator housing coupled to said housing, an actuator coupled to said actuator housing, and a connector structured to electrically connect the actuator to an electronic trip unit. The electrical switching apparatus further includes a current transformer assembly including a rod-shaped conductor electrically coupled to the load terminal and a current transformer disposed around the rod-shaped conductor, wherein the electronic trip unit is structured to electrically control actuation of the actuator.

An electrical switching apparatus includes a housing, a line terminal, a load terminal, separable contacts disposed on a conductive path between the line terminal and the load terminal, an operating mechanism structured to open and close said separable contacts, said operating mechanism including a trip bar, and an electronic trip unit. The electrical switching apparatus also includes a trip actuator assembly including an actuator housing coupled to said housing, an actuator coupled to said actuator housing, and a connector structured to electrically connect the actuator to an electronic trip unit. The electrical switching apparatus further includes a current transformer assembly including a rod-shaped conductor electrically coupled to the load terminal and a current transformer disposed around the rod-shaped conductor, wherein the electronic trip unit is structured to electrically control actuation of the actuator.

An electrical switching apparatus includes a housing, a line terminal, a load terminal, separable contacts disposed on a conductive path between the line terminal and the load terminal, an operating mechanism structured to open and close said separable contacts, said operating mechanism including a trip bar, and an electronic trip unit. The electrical switching apparatus also includes a trip actuator assembly including an actuator housing coupled to said housing, an actuator coupled to said actuator housing, and a connector structured to electrically connect the actuator to an electronic trip unit. The electrical switching apparatus further includes a current transformer assembly including a rod-shaped conductor electrically coupled to the load terminal and a current transformer disposed around the rod-shaped conductor, wherein the electronic trip unit is structured to electrically control actuation of the actuator.

An electrical switching apparatus includes a housing, a line terminal, a load terminal, separable contacts disposed on a conductive path between the line terminal and the load terminal, an operating mechanism structured to open and close said separable contacts, said operating mechanism including a trip bar, and an electronic trip unit. The electrical switching apparatus also includes a trip actuator assembly including an actuator housing coupled to said housing, an actuator coupled to said actuator housing, and a connector structured to electrically connect the actuator to an electronic trip unit. The electrical switching apparatus further includes a current transformer assembly including a rod-shaped conductor electrically coupled to the load terminal and a current transformer disposed around the rod-shaped conductor, wherein the electronic trip unit is structured to electrically control actuation of the actuator.