A rotor system for a multi-pole rotary electrical switch having a rotor with a top and a bottom. Bus plate connectors are held in chambers on the bottom of the rotor. Retainers in the chambers, engaging only sides of the bus plate connectors, prevent the bus plate connectors from dropping out of the chambers when the bus plate connectors are placed above bus plates in a bus plate holder to place the switch in an “OFF” position. Support members extend from a side of the rotor to support the bus plate connectors above the bus plates. When the rotor is rotated to the “OFF” position the support members are rotated up onto support posts positioned in the bus plate holder. When the rotor is rotated to an “ON” position the support members are rotated off the support posts and the bus plate connectors are pressed down against the bus plates by a spring, thereby creating electrical connections between the bus plate connectors and the bus plates.

An automatic transfer switch (100) for automatically switching an electrical load between two power sources is provided. Two power cords (106) enter the ATS (A power and B power inputs) and one cord (109) exits the ATS (power out to the load). The ATS has indicators (107) located beneath a clear crenelated plastic lens (108) that also acts as the air inlets. The ATS (100) also has a communication portal (103) and a small push-button (104) used for inputting some local control commands directly to the ATS (100). The ATS (100) can be mounted on a DIN rail at a rack and avoids occupying rack shelves.

A device and method for switching between a first power source and a second power source. The device includes a first terminal, a second terminal, and a third terminal that connect to the first power source, a load, and the second power source respectively. A first switch and a breaker circuitry connect the first terminal to the second terminal. A second switch interrupts an electrical connection between the third terminal and the second terminal. A lever operably coupled to the first switch and the second switch, the lever can be actuated by the first switch to flip the second switch between the open state and the closed state.

A first breaker is adapted to be connected to an external source of electrical power, and a second breaker is adapted to be connected to an electrical generator. The first breaker is in an on position when the second breaker is in an off position, and the first breaker is in an off position when the second breaker is in an on position. The breakers are in combination with a toggle adapted to simultaneously operate the first breaker and the second breaker. The first breaker has a first breaker hole, and the second breaker has a second breaker hole, where the first breaker electrically connects an external power transmission to a breaker box, and the second breaker electrically connects a generator to the breaker box. The toggle comprising an integral bar with a first toggle hole through the toggle, and a second toggle hole through the toggle, such that the first toggle hole and the second toggle hole are longitudinally spaced whereby the first toggle hole registers with the first breaker hole while the second toggle hole registers with the second breaker hole. A first bolt extends through both the first toggle hole and the first breaker hole, and a second bolt extends through the second toggle hole and the second breaker hole, such that when the first breaker is turned to an on position, the toggle simultaneously turns the second breaker to an off position, and when the first breaker is turned to an off position, the toggle simultaneously turns the second breaker to an on position.

A contactor assembly for a transfer switch includes a housing, first and second operating mechanisms in the housing, a first contact assembly in the housing and adjacent the first operating mechanism, a second contact assembly in the housing and adjacent the second operating mechanism, and a central control system in the housing and coupled to each of the first and second operating mechanisms. The central control system is configured to be manually actuated (i) in a first way to cause the first operating mechanism to change the first contact assembly to a closed state and to lock the second contact assembly in an open state and (ii) in a second way to cause the second operating mechanism to change the second contact assembly to a closed state and to lock the first contact assembly in an open state.

Methods of operating an automatic transfer switch (ATS) include detecting a first transition of an auxiliary contact set mechanically linked to a switch that selectively couples first and second AC power sources to an output of the ATS, determining a transition duration based on the detected first transition and a first assertion time of a first command for the first transition, identifying a second assertion time based on the determined transition duration, and asserting a second command for a second transition of the switch at the identified second assertion time.

A locking apparatus for a circuit breaker includes a locking pin including a main body; a rotatably or displaceably mounted definition tip; and a guide including a mating contour. In an embodiment, the locking pin is movably mounted within the guide. The definition tip is in alignment with the locking pin in a first position, such that the locking pin together, with the definition tip, is movable through the guide. Further, the definition tip cannot be moved through the guide in a second position, owing to the deflection of the rotatably and displaceably mounted definition tip of the locking pin.

A switch device includes first and second switch units that are coupled respectively to first and second output terminals. Each of the first and second switch units includes a plurality of diodes and at least one semiconductor-controlled rectifier (SCR), where at least one of the diodes and one of the at least one SCR cooperatively permit a current to flow therethrough to a corresponding one of the first and second output terminals when each thereof operates in an ON state, and where at least one of the diodes and one of the at least one SCR cooperatively permit a current to flow therethrough from a corresponding one of the first and second output terminals when each thereof operates in an ON state.

Systems and apparatuses include an automatic transfer switch including a source pole coupled with a power source, a first load pole coupled with a first load, a second load pole coupled with a second load, a first switch selectively coupling the first load pole to the source pole, and a second switch selectively coupling the second load pole to the source pole.

A modular transfer switch (22) and actuator (20) wherein multiple transfer switches are connectable in linear arrangement with the actuator such that the actuator controls the position of all of the transfer switches. Each of the transfer switches (22) includes a contact assembly (48) that converts over-rotation of the drive linkage (26) in the transfer switch to added pressure between the load contacts and the power contacts in the contact assembly.