Abstract:
Lighting assemblies or lighting fixtures suitable for use in a hazardous location are provided. Generally, the lighting fixtures include a light source assembly, a heat sink, a driver housing or gear module, and a conductive sealing member between the light source assembly and the heat sink. The conductive sealing member has a thermal conductivity of at least about 6 Watts per meter-Kelvin, and/or a thermal impedance of less than about 0.21 degree-C inch squared per Watt. The lighting fixtures have controlled directional heat transfer from the light source assembly to the exterior of the lighting fixture, while minimizing the heat transferred to the driver housing.
Abstract:
An LED downlight provides a more evenly distributed light output. The LED downlight includes an LED light source, such as one or more LEDs, LED die packages, or LED chip on board modules, an upper reflector, a lower reflector disposed below the upper reflector, and a lens disposed between the upper reflector and the lower reflector. The lens includes several features that help disperse light emitted by the LED light source. The lens includes a diffusion element, such as a pigment, bulk scattering, prismatic, inlays, or another method for diffusing light through a lens. The lens is curved in a concave manner when viewed from the light source. The curve of the lens can be tangent to the physical cutoff of the lower reflector to more evenly distribute light emitted by the LED light source and to improve the visual effect of an evenly luminous lens.
Abstract:
A ballast for a lamp has a battery that provides direct current in response to a loss of power. The ballast has a conversion circuit that is configured to receive the direct current from the battery and convert it into alternating current that is provided to a lamp. The alternating current is substantially sinusoidal, and has a current crest factor of 1.7 or less. The conversion circuit can use a push-pull topology. The ballast can also include a cathode-heating circuit for pre-heating a cathode associated with the lamp. The cathode-heating circuit pre-heats a cathode of the lamp by increasing the current output of the conversion circuit. The ballast can also include circuitry for converting mains power to power appropriate to illuminate the lamp.
Abstract:
A tank, mountable to an opening formed within a mounting pad, includes a front plate, at least one sidewall panel, a pedestal base, and a cover. The at least one sidewall panel is coupled to the front plate to form the tank sides. The pedestal base is coupled to the front plate and a lower portion of the sidewall panels. The cover is coupled to the upper portions of the sidewall panels. The sidewall panels are configured into a first shape which forms a gap between the opening and at least one of the sidewall panels when the sidewall panel lower portions are positioned adjacently above the opening. The pedestal base is configured into a second shape where the outer profile of the coupled pedestal base and the front plate completely covers the opening when disposed over the opening. The tank encloses an electrical device and a dielectric fluid.
Abstract:
Enclosures for use in hazardous areas include heat exchangers for active thermal management. The enclosures are coupled to a device having heat transfer capabilities. Equipment within the enclosures produces heat within the enclosure. The heat exchanger removes heat produced from the equipment and manages the internal temperature of the enclosures to a level suitable for hazardous locations. The enclosures can be actively cooled or heated using the device.
Abstract:
Magnetic component assemblies including moldable magnetic materials including surface mount termination features, as well as manufacturing methods therefor, are disclosed that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers.
Abstract:
A separable connector shield housing includes a layer of conductive material disposed at least partially around a layer of non-conductive material. The layers are molded together. The conductive material can be overmolded around the non-conductive material, or the non-conductive material can be insert molded within the conductive material. This results in an easy to manufacture, single component shield housing with reduced potential for air gaps and electrical discharge. The shield housing defines a channel within which at least a portion of a contact tube may be received. A contact element is disposed within the contact tube. The conductive material substantially surrounds the contact element. The non-conductive material can extend along an entire length of the contact tube and other components, or it may only extend partially along the contact tube. The non-conductive material can include an integral nose piece disposed along the contact tube.
Abstract:
A separable connector shield housing includes a layer of conductive material disposed at least partially around a layer of non-conductive material. The layers are molded together. For example, the conductive material can be overmolded around the non-conductive material, or the non-conductive material can be insert molded within the conductive material. The molding results in an easy to manufacture, single- component shield housing with reduced potential for air gaps and electrical discharge. The shield housing defines a channel within which at least a portion of a contact tube may be received. A contact element is disposed within the contact tube. The conductive material substantially surrounds the contact element. The non-conductive material can extend along an entire length of the contact tube and other components, or it may only extend partially along the contact tube. The non-conductive material can include an integral nose piece disposed along a nose end of the contact tube.
Abstract:
A power line monitoring device is mounted to a power line. The device includes circuitry for monitoring the power line and communicating information regarding the power line. A ground reference point of the circuitry is electrically coupled to the power line. Therefore, the monitoring device, including its circuitry, has substantially the same voltage potential as the power line. Accordingly, there is a substantially equalized or uniform electric field around the device The substantially equal voltage potential and electric field allow communications with the monitoring device to have reduced noise and interference, as compared to other devices that have different voltage potentials than their corresponding power lines. A pad of semi-conductive material may be disposed between the power line and the electrical conductors to slow a rate of change of the voltage potential of the device circuitry when mounting the device to the power line, minimizing risk of corona discharge.
Abstract:
Electrical fuse indicators used to detect when fuses enter an open state. Each fuse in an electrical system may be connected to a wireless identification element, which alerts a communication unit that the fuse has entered an open state. The wireless identification device may include an antenna. The antenna may be in contact with a fuse element, such that opening of the fuse element renders the antenna inoperable. Alternatively the antenna may be connected to the fuse element in such a manner that opening of the fuse element alters the frequency on which the antenna transmits. A logic port may also be used to detect the operational state of a fuse. Use of such indicators is compatible with existing infrastructure.