Abstract: An automatic drain system may comprise a drain including a neck defining a drain orifice and a flange extending from the neck. A liquid detection sensor is located on at least one of the neck or the flange. A sink assembly may comprise a sink basin and the drain located in a sink opening formed in the sink basin.

Abstract: An automatic drain system may comprise a drain including a neck defining a drain orifice and a flange extending from the neck. A liquid detection sensor is located on at least one of the neck or the flange. A sink assembly may comprise a sink basin and the drain located in a sink opening formed in the sink basin.

Abstract: An automatic drain system may comprise a drain including a neck defining a drain orifice and a flange extending from the neck. A liquid detection sensor is located on at least one of the neck or the flange. A sink assembly may comprise a sink basin and the drain located in a sink opening formed in the sink basin.

Abstract: A capacitive point source sensor for detecting presence of a liquid includes a main body having a sensor end and an outer end, the main body being configured to be coupled to and at least partially inserted through a container of the liquid. The sensor further includes two conductive contacts located on the sensor end of the main body. The sensor further includes an insulator enclosing the two conductive contacts.

Abstract: An automatic drain system may comprise a drain including a neck defining a drain orifice and a flange extending from the neck. A liquid detection sensor is located on at least one of the neck or the flange. A sink assembly may comprise a sink basin and the drain located in a sink opening formed in the sink basin.

Abstract: An aircraft heated floor panel includes a first face sheet, a second face sheet opposite the first face sheet, and core with an electrically conductive core portion. The electrically conductive core portion supports the first face sheet and the second face sheet, and is electrically insulated from the external environment to receive electrical power, resistively generate heat, and communicate heat to the first face sheet.

Abstract: A capacitive point source sensor for detecting presence of a liquid includes a main body having a sensor end and an outer end, the main body being configured to be coupled to and at least partially inserted through a container of the liquid. The sensor further includes two conductive contacts located on the sensor end of the main body. The sensor further includes an insulator enclosing the two conductive contacts.

Abstract: A capacitive point source sensor for detecting presence of a liquid includes a main body having a sensor end and an outer end, the main body being configured to be coupled to and at least partially inserted through a container of the liquid. The sensor further includes two conductive contacts located on the sensor end of the main body. The sensor further includes an insulator enclosing the two conductive contacts.

Abstract: A fault interrupt module includes a detector circuit, a counter circuit, and a switch circuit. The detector circuit is configured to detect faults as a difference in current between an input power line and a neutral line. The counter circuit configured to increment a fault count each time a fault is detected by the detector circuit, and the switch circuit is configured to terminate power to a load upon the fault count reaching a threshold count within a threshold time period.

Abstract: A fault interrupt module includes a detector circuit, a counter circuit, and a switch circuit. The detector circuit is configured to detect faults as a difference in current between an input power line and a neutral line. The counter circuit configured to increment a fault count each time a fault is detected by the detector circuit, and the switch circuit is configured to terminate power to a load upon the fault count reaching a threshold count within a threshold time period.

Abstract: A heating arrangement has a positive temperature coefficient (“PTC”) heater. A resistor is electrically in series with the PTC heater sized and configured to limit current through the PTC heater and the resistor below a selected value.

Abstract: A heater electrical short protection arrangement has a heating layer that is at least partially electrically conductive. A conductive layer is initially electrically insulated from the heating layer. A circuit in electrical communication with the conductive layer is configured to halt a supply of electrical energy to the heating layer in response to current flowing into the conductive layer.

Abstract: A heating arrangement has a positive temperature coefficient (“PTC”) heater. A resistor is electrically in series with the PTC heater sized and configured to limit current through the PTC heater and the resistor below a selected value.

Abstract: An aircraft heated floor panel includes a first face sheet, a second face sheet opposite the first face sheet, and core with an electrically conductive core portion. The electrically conductive core portion supports the first face sheet and the second face sheet, and is electrically insulated from the external environment to receive electrical power, resistively generate heat, and communicate heat to the first face sheet.

Abstract: A power control system includes a multi-phase power source, an ungrounded multi-phase load, a plurality of power switching circuits and a plurality of zero-crossing circuits. The multi-phase power source includes a plurality of phase power outputs. The plurality of power switching circuits are each connected to provide power from one of the plurality of phase power outputs to the ungrounded multiphase load. The plurality of zero-crossing circuits are connected to provide control signals to the plurality of power switching circuits. Each of the plurality of zero-crossing circuits are connected between one of the plurality of power phase outputs and an ungrounded reference.

Abstract: A power control system includes a multi-phase power source, an ungrounded multi-phase load, a plurality of power switching circuits and a plurality of zero-crossing circuits. The multi-phase power source includes a plurality of phase power outputs. The plurality of power switching circuits are each connected to provide power from one of the plurality of phase power outputs to the ungrounded multiphase load. The plurality of zero-crossing circuits are connected to provide control signals to the plurality of power switching circuits. Each of the plurality of zero-crossing circuits are connected between one of the plurality of power phase outputs and an ungrounded reference.

Abstract: A liquid level sensing system includes a vessel and an electrode. The vessel includes a vessel wall separating a vessel interior from a vessel exterior. The electrode is mounted to an exterior side of the vessel wall spanning a distance corresponding to a desired-level-determining range. The vessel wall is a dielectric gap between the electrode and the vessel interior. The electrode is configured to collect a charge corresponding to a liquid level. A method for determining a liquid level in a vessel includes collecting a charge on an electrode, sensing the collected charge on the electrode with a capacitance sensor through an electrical line, and determining a liquid level in a vessel based on the collected charge sensed by the capacitance sensor.

Abstract: A liquid level sensing system includes a vessel and an electrode. The vessel includes a vessel wall separating a vessel interior from a vessel exterior. The electrode is mounted to an exterior side of the vessel wall spanning a distance corresponding to a desired-level-determining range. The vessel wall is a dielectric gap between the electrode and the vessel interior. The electrode is configured to collect a charge corresponding to a liquid level. A method for determining a liquid level in a vessel includes collecting a charge on an electrode, sensing the collected charge on the electrode with a capacitance sensor through an electrical line, and determining a liquid level in a vessel based on the collected charge sensed by the capacitance sensor.

Abstract: A fault protected aircraft heated floor panel is provided. The floor panel includes upper and lower floor panel skins and an electro-resistive heater element interposed between the upper and lower floor panel skins. The floor panel further includes a controller for controlling current delivered to the heater element, the controller including a ground fault interrupt circuit that detects excess reactive current provided to the heater element. The controller interrupts the current delivered to the heater element as a result of the ground fault interrupt circuit detecting the excess current.

Abstract: A water-purification device (22) for a potable water system comprising a chamber (23) through which water flows, a plurality of light-emitting diodes (24) that radiate ultraviolet light into the water within the chamber (23), and a driver circuit (26) providing power to the light-emitting diodes. The light-emitting diodes (24) can be positioned within or outside of the chamber (23) and they can be electrically connected in series. The drive circuit (26) receives voltage from a power source (e.g., an onboard power source on an aircraft) and can include a feedback accessory (40), an input accessory (42) and/or a fault-status accessory (44).