Abstract: A power distribution unit (PDU) disposable in an electrical equipment rack. The PDU has a housing, a power input penetrating the housing, outlets in the housing, a processor disposed in the housing, voltage and current sensors, and a voltage calculation procedure communicable with the processor. The processor samples voltage and current waveforms and calculates RMS values and other power parameters. A method of managing electrical loads each drawing electrical power from a PDU includes repeatedly sampling voltage across and current flowing through each of the loads, calculating raw RMS values of voltage and current, and scaling the raw RMS values to obtain corrected RMS voltage and current values and other power parameters.

Abstract: Described herein are various embodiments of a fuse module for fused electrical devices. According to one exemplary embodiment, a fuse module is mounted to the housing of a fused electrical device. The fused electrical device can include at least one power output displaced along the power distribution housing with the at least one power output electrically couplable to at least one power input. The fuse module can be electrically coupled to the at least one power input and electrically couplable to the at least one power outputs. Further, the fuse module can comprise at least one fuse holder that is movable between a first position in which a fuse held by the fuse holder is electrically couplable to the at least one power output and a second position in which a fuse held by the fuse holder not electrically couplable to the at least one power output and is exposed to allow access to the fuse.

Abstract: An electrical power distribution unit can include a power distribution unit enclosure, a power input associated with the power distribution unit enclosure, and a plurality of power outputs associated with the power distribution unit enclosure. At least certain power outputs can be connectable to one or more electrical loads external to the power distribution unit enclosure and to the power input. In some embodiments, an intelligent power section can communicate with at least one of the power outputs and can connect to a communications network external to the power distribution unit enclosure.

Abstract: Described herein are various embodiments of a power distribution unit having modular components. For example, according to one embodiment, a power distribution unit can include a component portion that comprises at least two modules including outlet modules, circuit protection modules, power input modules, communications I/O modules, and display modules. Each of the at least two modules of the component portion can comprise at least one connection element and can be removably secured to one or more other of the at least two modules via the connection elements. The power distribution unit can also include a housing that defines an interior cavity. The component portion can be removably secured to the housing at least partially within the interior cavity.

Abstract: A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible alarm for each phase of power if the current exceeds a predetermined value or falls below a predetermined value. In three-phase wye power systems, the apparatus preferably includes a neutral line monitor, including a neutral line current display and audio alarm, for the neutral line of the wye power circuit. The apparatus preferably is lightweight, elongated, portable, and mountable to the side of an electronic equipment rack. It may also include additional power monitoring systems such as network power monitoring tools for remotely monitoring the apparatus.

Abstract: A power management system embodiment of the present invention comprises a power manager with a network agent in communication over a network with a network manager. The power manager is connected to control the operating power flowing to various pieces of computer network equipment at a single site. A user is able to assign names to each control port, and the power manager maintains a list of enrolled users who have access. Many operational mode choices are possible, and each can be configured by the user while remote from the power manager. The power manager can be commanded to upload a user configuration list, and it can be commanded to accept a downloaded user configuration list.

Abstract: Described herein are various embodiments of a fuse module for fused electrical devices. According to one exemplary embodiment, a fuse module is mounted to the housing of a fused electrical device. The fused electrical device can include at least one power output displaced along the power distribution housing with the at least one power output electrically couplable to at least one power input. The fuse module can be electrically coupled to the at least one power input and electrically couplable to the at least one power outputs. Further, the fuse module can comprise at least one fuse holder that is movable between a first position in which a fuse held by the fuse holder is electrically couplable to the at least one power output and a second position in which a fuse held by the fuse holder not electrically couplable to the at least one power output and is exposed to allow access to the fuse.

Abstract: Described herein are various embodiments of a power distribution unit having modular components. For example, according to one embodiment, a power distribution unit can include a component portion that comprises at least two modules selected from the group consisting of outlet modules, circuit protection modules, power input modules, communications I/O modules, and display modules. Each of the at least two modules of the component portion can comprise at least one connection element and can be removably secured to one or more other of the at least two modules via the connection elements. The power distribution unit can also include a housing that defines an interior cavity. The component portion can be removably secured to the housing at least partially within the interior cavity.

Abstract: An electrical power distribution unit can include a power distribution unit enclosure, a power input associated with the power distribution unit enclosure, and a plurality of power outputs associated with the power distribution unit enclosure. At least certain power outputs can be connectable to one or more electrical loads external to the power distribution unit enclosure and to the power input. In some embodiments, an intelligent power section can communicate with at least one of the power outputs and can connect to a communications network external to the power distribution unit enclosure.

Abstract: Described herein are various embodiments of a fuse module with a fuse carrier for fused electrical devices. According to one exemplary embodiment, at least one fuse module can be mounted to a power distribution unit for receiving at least one power input and providing power to associated electronic equipment. The power distribution unit can have a housing with at least one fuse access passage and at least one power output displaced along the housing and electrically couplable to the at least one power input. The fuse module can be disposed at least partially within the at least one fuse access passage and be electrically couplable to the at least one power input and at least one power output. The fuse module can have at least one removably attachable fuse carrier that, when attached, electrically couples a fuse housed by the fuse carrier to the at least one power input and the at least one power output.

Abstract: Managing electrical power usage in a power distribution system. Power usage data indicative of electrical current flow through electrical outlets in the system are collected and displayed for a user. The user may select an outlet and issue a command to control current flow through that outlet. Environmental data may also be collected and displayed. Outlets in different Cabinet Power Distribution Units (CDUs) in different locations may be clustered for reporting and control. A database structure provides a “system” table for data descriptive of the system, a “tower” table for data descriptive of outlets and other elements in the system, an “infeed” table for data descriptive of input electrical power, and an “outlet” table for data descriptive of electrical power flowing through the outlets.

Abstract: A system and a method are provided for determining the position of an underwater vehicle while the vehicle is operating underwater. A buoyant float stays on or near the surface of the water and is attached to the vehicle by thin tether that can include insulated wires. The vehicle moves under the water and pulls the float behind it. The float can receive a localization signal, such as a signal indicating its GPS position, and so can determine its position precisely. The position can be transmitted to the underwater vehicle over the wires located in the tether. The underwater vehicle can use sensors and/or calculations to determine the positional offset of the vehicle from the float buoy and generates its true position based on the known position of the float and the positional offset. The float can be constructed with attributes that will allow the float it operate with a greater tether length, and in turn allow the underwater vehicle to operate at greater depths.

Abstract: A method for determining the position of an underwater device includes placement of a plurality of station keeping devices on or below the surface of the water in known positions. A device to locate is provided for placement below the surface of the water, and the device to locate and the station keeping devices are provided with a synchronized time base and a common acoustic pulse time schedule. Each station keeping device sends an acoustic pulse at a time according to the common acoustic pulse schedule. The device to locate receives pulses sent by the station keeping devices and calculates a distance between itself and each station keeping device based upon the time that the acoustic pulse is sent and the time that the pulse is received. The device to locate then calculates its position based upon the distances between the device to locate and the station keeping devices. Systems and devices are also disclosed.

Abstract: An electrical apparatus has an elongated housing with fuses located therein. Windows are provided in the housing to close apertures in registration with fuse locations to allow access to fuses by removing the window. Fuses may be carried on a circuit card removably engageable with a terminal block secured to a wall within the housing. A fuse compartment cover is removably secured to the housing. The window comprises a fuse condition indicator to allow determination of the condition of the fuse (i.e. blown or not blown) without having to open the window. Additionally, powered indicators such as LEDs visible through the windows may indicate the state of fuses. The housing may comprise a power distribution unit and may be rack mounted or mounted to a wall of a rack assembly. The windows are located on the housing to be removable free of engagement with the assembly.

Abstract: Described herein are various embodiments of a power distribution unit having modular components. For example, according to one embodiment, a power distribution unit can include a component portion that comprises at least two modules selected from the group consisting of outlet modules, circuit protection modules, power input modules, communications I/O modules, and display modules. Each of the at least two modules of the component portion can comprise at least one connection element and can be removably secured to one or more other of the at least two modules via the connection elements. The power distribution unit can also include a housing that defines an interior cavity. The component portion can be removably secured to the housing at least partially within the interior cavity.

Abstract: Embodiments of a power distribution apparatus that is adaptable to be readily mounted within a variety of differing types of electronic equipment racks are herein described. One such embodiment provides power distribution apparatus having an upper mounting adapter. The upper mounting adapter may be attachable to a housing of the power distribution apparatus or may be integrally formed therein. Another embodiment provides power distribution apparatus having a lower mounting adapter. The lower mounting adapter may be attachable to the housing of the power distribution apparatus or may be integrally formed in the housing. A further embodiment provides power distribution apparatus having at least one mounting peg mounting in mating holes formed in a rack. The mounting pegs may be attachable to a housing of the power distribution apparatus or may be integrally formed therein.

Abstract: Methods and devices are provided for rescuing and recovering underwater vehicles. In one embodiment, a system is provided that includes a modular rescue device configured to attach to an underwater vehicle, such as with a tow line. The rescue device can include one or more emergency mechanisms that can be automatically and/or manually activated to aid in detecting the location of the underwater vehicle in the event of an emergency. One exemplary emergency mechanism includes a buoyancy mechanism, e.g., an expandable lift bag, configured to be inflated with a fluid to add buoyancy force to the system to pull the underwater vehicle toward a water surface. Another exemplary emergency mechanism includes a signaling mechanism configured to signal the underwater vehicle's location.

Abstract: A method for determining the position of an underwater device includes placement of a plurality of station keeping devices on or below the surface of the water in known positions. A device to locate is provided for placement below the surface of the water, and the device to locate and the station keeping devices are provided with a synchronized time base and a common acoustic pulse time schedule. Each station keeping device sends an acoustic pulse at a time according to the common acoustic pulse schedule. The device to locate receives pulses sent by the station keeping devices and calculates a distance between itself and each station keeping device based upon the time that the acoustic pulse is sent and the time that the pulse is received. The device to locate then calculates its position based upon the distances between the device to locate and the station keeping devices. Systems and devices are also disclosed.

Abstract: Described herein are various embodiments of a fuse module for fused electrical devices. According to one exemplary embodiment, a fuse module is mounted to the housing of a fused electrical device. The fused electrical device can include at least one power output displaced along the power distribution housing with the at least one power output electrically couplable to at least one power input. The fuse module can be electrically coupled to the at least one power input and electrically couplable to the at least one power outputs. Further, the fuse module can comprise at least one fuse holder that is movable between a first position in which a fuse held by the fuse holder is electrically couplable to the at least one power output and a second position in which a fuse held by the fuse holder not electrically couplable to the at least one power output and is exposed to allow access to the fuse.

Abstract: A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible alarm for each phase of power if the current exceeds a predetermined value or falls below a predetermined value. In three-phase wye power systems, the apparatus preferably includes a neutral line monitor, including a neutral line current display and audio alarm, for the neutral line of the wye power circuit. The apparatus preferably is lightweight, elongated, portable, and mountable to the side of an electronic equipment rack. It may also include additional power monitoring systems such as network power monitoring tools for remotely monitoring the apparatus.