Abstract: An apparatus for a photovoltaic system in which multiple poles are connectable with multiple fuses is provided. The apparatus includes a rotor configured to occupy at least first and second rotational angles, a disconnect unit including a plurality of interrupter housings respectively configured to connect at least one of the multiple poles with at least one of the multiple fuses in accordance with a rotational angle of the rotor, at least one of the plurality of the interrupter housings being mutually connectable, a transmission unit disposed and configured to electrically combine the multiple poles into a lesser number of the multiple poles, a housing sized to house the rotor, the disconnect unit and the transmission unit and an actuator arm disposed at the exterior of the housing and configured to be selectively actuated to cause the rotor to occupy the at least one of the rotational angles.

Abstract: A stack light having both steady and flashing light capabilities is disclosed. In an exemplary embodiment, the light stack or signaling light beacon comprises a light module containing a socket for a lamp, circuitry for operating the light module, and a jumper connector connected to the circuitry for selecting between flashing and steady light within the light module.