196 results about "Isolated ground" patented technology

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components.

An outlet that includes first and second substrates, and a plurality of electrical contacts. The first substrate includes an electrical circuit adjacent to and spaced apart from a first ground plane. Each of the electrical contacts is connected to the circuit. The second substrate includes a second ground plane electrically connected to the first ground plane. The circuit is spaced apart from the second ground plane. The electrical contacts are positioned adjacent to the first and second substrates. Together the first and second ground planes may form a localized, electrically floating, isolated ground plane. The outlet may be connected to a cable and / or configured to be mounted to a panel for use with a rack. The outlet may be implemented as a Category 7A and / or Next Generation type outlet having an overall height that allows two rows of twenty-four like outlets to be mounted within one rack unit (“1RU”).

A ground fault detection system based on capacitive sensing suitable for use in detecting a ground fault condition in electronic equipment (such as a PCBA) with a circuit ground electrically isolated from an isolation ground (such as chassis ground). The capacitive sensing system includes a capacitive sensor capacitively coupled to the system isolation ground, and a capacitance / data converter that captures sensor capacitance measurements for conversion to sensor data representative of a ground short. In one embodiment, the capacitive sensor includes a sensor electrode capacitively coupled to the system isolation ground by one of projected capacitance and a floating capacitor (such as 33 pf), and the CDC unit further includes sensor excitation circuitry configured to drive the sensor electrode, such that a sensor capacitance (projected or floating capacitance) is representative of an electrical condition of the system isolation ground. For sensing by projected capacitance, the capacitive sensor can include a driven shield.

A method of testing live AC circuits for neutral-ground, neutral-isolated ground, and isolated ground-ground faults, involves measuring impedances of circuit portions, including hot-neutral, neutral-ground, neutral-ground and isolated ground loops. In general either a test current generating a driving voltage is used, or in the case of hot-neutral, a load current generating a load voltage, and the voltage without current are use to measure voltage drop. These voltages are proportionate to the impedances of the circuits, which are expressed as ratios indicating the presence of faults. The method is reliable, despite much variation in circuit characteristics, including oversized neutral, shared neutral same phase, shared neutral opposed phase, supply line impedance, and high impedance grounds, it is easily able to detect faults across conductors and shared neutral loads.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components. A signal connection module includes circuitry for surge protection of the connected A / V components receiving electrical power from an adjacent wall socket. The protection circuits in the signal connection module provides an isolated ground reference for the A / V components sharing a common ground connection at the wall socket, or a power conditioning module connected thereto.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components. A signal connection module includes circuitry for surge protection of the connected A / V components receiving electrical power from an adjacent wall socket. The protection circuits in the signal connection module provides an isolated ground reference for the A / V components sharing a common ground connection at the wall socket, or a power conditioning module connected thereto.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components.

The invention relates to a complete set of compound grounding devices of the controllable reactor and the small resistor for the power grid. The invention is characterized in that the invention comprises a grounding transformer (1), a controllable reactor (2), a small resistor (3) and a controller (4); the secondary winding of the grounding transformer (1) is connected with the neutral point (PT) of the power grid and connected with the grounding point (CT) through the controllable reactor (2), and the small resistor (3) is connected in series with a high voltage switch (5), and the small resistor (3) and the high voltage switch (5) are connected in parallel with the controlled reactor (2); the two inputs of the controller (4) are connected with PT and CT respectively, and the control signal output of the controller (4) is connected with the control input of the high voltage switch (5). The invention solves the problems that various prior protection devices for the grounding fault of the power grid are very difficult to be grounded in isolation, and the grounding lines are very difficult to be found. The invention implements the fast removal of the fault without tripping, and is an ideal set of grounding fault protection device for the distribution network.

The invention discloses a solid insulation ring main unit, comprising a high-voltage switch unit; the high-voltage switch unit comprises a vacuum arc-extinguishing chamber and an isolation grounding switch device comprising an insulation cavity body; a line outlet end, a grounding end and a line inlet end electrically connected with a conductive rod are arranged on the insulation cavity body; a vacuum switch tube for grounding is fixedly arranged inside or outside the insulation cavity body; the static contact of the vacuum switch tube for grounding is electrically connected with the grounding end while the movable contact is provided with a grounding wiring part; the movable contact of the vacuum switch tube for grounding is in transmission connection with a grounding operative mechanism; an isolation disconnecting link is arranged in the insulation cavity body; one end of the isolation disconnecting link is a hinging end hinged to the line outlet end while the other end is a contact end; and a driving mechanism is connected onto the isolation disconnecting link in a transmission way. The isolation grounding switch is positioned in different work conditions by controlling the swinging of the isolation disconnecting link and the connecting / disconnecting states of the static and movable contacts in the vacuum switch tube.

The invention relates to a three-station vacuum arc extinguish chamber for isolated grounding, which is mainly applied to medium-voltage power switch equipment and comprises an isolated outer shell, a fixed cover plate, a movable cover plate, a fixed end conducting rod, a movable end conducting rod, a fixed contact, a movable contact, a corrugated pipe and a protective cover, wherein the fixed cover plate and the movable cover plate are respectively arranged at the upper end and the lower end of the isolated outer shell, the top of the fixed end conducting rod is welded with the fixed cover plate, and the bottom of the fixed end conducting rod is welded with the fixed contact; the protective cover of the corrugated pipe is arranged outside the corrugated pipe; the movable contact is formed by welding an isolated contact and a movable grounding contact; the middle of the isolated outer shell is provided with a grounding ring, the upper surface and the lower surface of the grounding ring are connected with the isolated outer shell through a sealing ring, and the upper surface of the grounding ring is welded with a fixed grounding contact; the bottom of the fixed cover plate is welded with a fixed end isolated shielding cover, a middle isolated shielding cover is arranged on a bead at the upper part of an inner cavity of the isolated outer shell, and a grounding isolated shielding cover is arranged on the grounding ring; one end of the movable end conducting rod is welded with the movable grounding contact after penetrating through the cover plates, the corrugated pipe, the grounding isolated shielding cover, the middle isolated shielding cover and the fixed end isolated shielding cover, and a movable end voltage-sharing cover is welded on the movable cover plate. The invention has the advantages of simple structure and low cost.

A DC-to-AC power conversion system includes DC power source assemblies each having a plurality of DC power sources and a combiner coupled to the DC output from the DC power source assemblies. A power inverter is coupled to a DC output of the combiner and configured to invert the DC output to an AC output. The system includes a controller programmed to identify a potential ground fault using current data received from a ground current sensor provided on a ground conductor. After identifying the faulty DC power source using sensed current data received from a current sensor provided on at least one of the positive conductors and the negative conductors, the controller opens the DC breaker switches on a positive conductor and a negative conductor of the combiner to disconnect the faulty DC power source assembly from the power inverter.

An outlet that includes first and second substrates, and a plurality of electrical contacts. The first substrate includes an electrical circuit adjacent to and spaced apart from a first ground plane. Each of the electrical contacts is connected to the circuit. The second substrate includes a second ground plane electrically connected to the first ground plane. The circuit is spaced apart from the second ground plane. The electrical contacts are positioned adjacent to the first and second substrates. Together the first and second ground planes may form a localized, electrically floating, isolated ground plane. The outlet may be connected to a cable and / or configured to be mounted to a panel for use with a rack. The outlet may be implemented as a Category 7A and / or Next Generation type outlet having an overall height that allows two rows of twenty-four like outlets to be mounted within one rack unit (“1RU”).

The invention discloses a gas insulated switchgear, including at least two isolation units and two earth units, breaker units connect with the isolation units and the earth units, and a shell contains insulating air and the breaker units, and the axis of the shell is in horizontal direction. The described two isolation units and the earth units are set on both sides of the breaker unit, which are the composite isolation-earth switch base on isolation function and earth function, and it achieves a mechanical interlock about the isolation function and earth function. The two isolation-earth switches are placed on each side of the two isolation-earth switch containers, and the top of each container vertically connects a metal airtight container and an insulation sleeve, and the insulation sleeve is set vertically. The isolation-earth switch connects to a conductor overhead through the insulation sleeve on the left and connects to a bus conductor of electricity overhead through the insulation sleeve on the right.

This invention provides a high frequency power module which is incorporated into a mobile phone and which incorporates high frequency portion analogue signal processing ICs including low noise amplifiers which amplify an extremely weak signal therein. A semiconductor device includes a sealing body which is made of insulation resin, a plurality of leads which are provided inside and outside the sealing body, a tab which is provided inside the sealing body and has a semiconductor element fixing region and a wire connection region on a main surface thereof, a semiconductor element which is fixed to the semiconductor element fixing region and includes electrode terminals on an exposed main surface, conductive wires which connect electrode terminals of the semiconductor element and the leads, and conductive wires which connect electrode terminals of the semiconductor element and the wire connecting region of the tab. In such a semiconductor device, a circuit formed in the semiconductor element in a monolithic manner is comprised of a plurality of circuit parts and, in a specified circuit part (a low noise amplifier) which forms a portion of the circuit parts, all grounding electrode terminals out of electrode terminals of the semiconductor element are not connected to the tab through wires but are connected with the leads through wires.

A foundation system for supporting a manufactured building having a support beam, comprising a ground pan having a planar surface received on a ground surface and a thermally insulative member disposed on the ground pan, which cooperatively define in situ a proximate thermally isolated ground column, with a foundation support connected to the ground pan and to the support beam, the thermally insulative member restricts communication of heat from the proximate thermally isolated ground column below the ground pan for resisting frost heaving. A method of resisting frost heave of a foundation is disclosed.

This invention relates to an isolator. Primarily, an insulation cover is inserted by a connector being disposed with a plug-in unit. At least one iron core is disposed around a tube at the other end of a connector. A front cover is connected with a fixing seat having a first space and a second space in which first and second ring capacitors are respectively received. An insulation sleeve is arranged between the first and second ring capacitors. One end of each ring capacitor is disposed with a circular spring correspondingly. The other end of the fixing seat is connected to an outer tube, the outer end of which is arranged with a terminal portion with a plug-in unit mounted therein. Thereby the simplified structure of the isolator with an isolated ground effect improves the impedance matching and has properties of better bandwidth flatness, lower insertion loss, and better return loss.

Disclosed is a solid assembly unit of a switchgear cubicle for a loop network. The problems that an existing solid insulation switchgear cubicle for the loop network is not sealed or not sealed tightly and a three-station isolating grounding switch is free of visible fractures are solved. The solid assembly unit comprises a three-station isolating grounding switch module and a vacuum circuit breaker and load switch module, and is essentially technically characterized in that the three-station isolating grounding switch module comprises a small-sized modular operating mechanism and three-station isolating grounding switch poles with visible fractures, the vacuum circuit breaker and load switch module comprises a vacuum circuit breaker and load switch poles and a small-sized multifunctional operating mechanism, and the vacuum circuit breaker and load switch module and a universal connecting flange of the three-station isolating grounding switch module are mutually sealed by a silicone rubber sealing ring and are fixedly connected by bolts for sealed insulation. The solid assembly unit is compact in structure, reasonable in design, easy for modularization of parts, visible in fractures, high in insulating strength, good in interchangeability, convenient to install and debug and safe and reliable to use.

An aircraft having an airframe made of a composite material is provided with an isolated ground in order to reduce the threat of electrical fires. The aircraft includes a voltage source and at least one electronic device mounted on the airframe. Further, a power wire isolated from the airframe interconnects the voltage source and the electronic device. Also, a ground wire isolated from the airframe interconnects the voltage source and the electronic device. As a result, the onboard electric circuits are isolated from the airframe. In order to reduce electromagnetic interference in the circuit, the aircraft may be provided with a powerside capacitor, to interconnect the power wire and the airframe, and a groundside capacitor, to interconnect the ground wire and the airframe.

The invention relates to a combine electrical apparatus isolation earthing switch operating mechanism. A transmission shaft is provided with a cylindrical energy storage flywheel and a truncated cone-shaped striking flywheel which is internally provided with a flying block; an output shaft is provided with a transition wheel which is movably matched with the output shaft, a radial cam and a divided wheel which is fixedly connected with the output shaft; the transition wheel is fixedly connected with the radial cam by an end face D-pad; the flying block is intermittently connected with a till-shaped rotating hammer in a striking way; the radial cam drives the divided wheel and the output shaft by a loose key to rotate according to a stated angle; the low part of the transition wheel is provided with a release used for forcibly releasing the striking; the flying block is internally provided with a steel ball and a spring which can accelerate the flying block. The operating mechanism can realize different output angles of two work stations, three work stations, multistation 15 degrees-165 degrees and the like and is applied to the operation of 110kV, 220kV, and 550kV combined electrical apparatus isolation, earthing switches and isolation earthing combined switches, has the main advantages of high indexing accuracy, firm position locking, convenient regulation, low manufacturing cost, compact structure, low volume, extensive application, etc.

The invention relates to the field of high-voltage switches, particularly to an isolation grounding switch mechanism, a single-pole component and GIS electrical equipment. The isolation grounding switch mechanism includes a housing and an isolation switch and a grounding switch which are assembled on the housing in L-shaped distribution, the isolation switch includes an isolation switch moving contact and an isolation switch static contact, the grounding switch includes a grounding switch moving contact and a grounding switch static contact, a connection contact seat used for being electrically connected with a voltage transformer is arranged between the isolation switch and the grounding switch, the isolation switch static contact and the grounding switch moving contact are integrated on the connection contact seat, the isolation switch moving contact is electrically connected with a main conductive loop, and the grounding switch moving contact is electrically connected with ground potential. The isolation switch and the grounding switch are combined together, overall components and butting faces are few, and the structure is simple and compact.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components. A signal connection module includes circuitry for surge protection of the connected A / V components receiving electrical power from an adjacent wall socket. The protection circuits in the signal connection module provides an isolated ground reference for the A / V components sharing a common ground connection at the wall socket, or a power conditioning module connected thereto.

Systems and methods for locating any grounded circuit on an ungrounded AC or DC system without de-energizing the circuit, and enabling isolation of the grounded component of the circuit. A load is fed through an isolation device, such as a transformer for AC systems or a DC-to-DC converter for DC systems, and isolated from the normal distribution system without ever being de-energized. Once the isolating device is paralleled with the normal source for the load, the normal source is removed, leaving the load energized and fed by the isolating device. A ground detector relay is added at the secondary side of the isolation device to detect unwanted grounds along with a ground locating method to isolate the source of the ground, such as by oscillating the ground current. Once the grounded circuit is located, further troubleshooting may be performed to isolate the grounded component.

A method of testing live AC circuits for neutral-ground, neutral-isolated ground, and isolated ground-ground faults, involves measuring impedances of circuit portions, including hot-neutral, neutral-ground, neutral-ground and isolated ground loops. In general either a test current generating a driving voltage is used, or in the case of hot-neutral, a load current generating a load voltage, and the voltage without current are use to measure voltage drop. These voltages are proportionate to the impedances of the circuits, which are expressed as ratios indicating the presence of faults. The method is reliable, despite much variation in circuit characteristics, including oversized neutral, shared neutral same phase, shared neutral opposed phase, supply line impedance, and high impedance grounds, it is easily able to detect faults across conductors and shared neutral loads.

A double-breaker DCB type high-voltage composite apparatus comprises a support, a voltage transformer, a current transformer, a casing pipe or a cable tank, three-station isolation / grounding switches, a breaker mechanism, a tank body and a collection control tank, a breaker structure comprises two breakers symmetrically arranged in the tank body, an insulation supporting piece is arranged between two arc extinguish chambers of the two breakers, the two arc extinguish chambers are double-fracture arc extinguish chambers with taps in the middles, the first three-station isolation / grounding switch, the second three-station isolation / grounding switch, the third three-station isolation / grounding switch and the fourth three-station isolation / grounding switch are arranged on the upper sides and the lower sides of the taps and above the two symmetrically-arranged breakers respectively, the first three-station isolation / grounding switch, the second three-station isolation / grounding switch and the third three-station isolation / grounding switch are connected with the casing pipe or the cable tank with the current transformer, and the fourth three-station isolation / grounding switch is connected with the voltage transformer. Insulation gas is adopted in the arc extinguish chambers to be used as inner insulation, the double-breaker DCB type high-voltage composite apparatus can meet the requirement of a digital substation, the occupied area is reduced, mounting time is shortened, and the reliability and safety of the apparatus are improved.

A multi-layer circuit module with multi-layer substrate and embedded passive elements features that the ICs are installed on one or two surfaces, the connecting lines are arranged in internal tracingarea, the basic passive elements (capacitor, resistor and inductor) are arranged in basic passive element area, the high-frequency elements (filter, coupler, and impedance converter) are arranged in high-frequency passive element area, grounded bayers are used for isolating element to prevent electromagnetic interference, and standard I / O pins are formed on the surface of bottom surface.

The invention relates to a conversion-drum three-position isolating mode and a conversion-drum three-position isolating switch. In the isolating mode, three-position isolating operation is realized through a conversion drum; a three-position operating mode comprises an operating mode, a grounding mode and a workshop power supply mode; a pressure-regulating and large current flow contact is taken as a stationary contact in a conversion drum mode; and optional positioning is performed and the switch-on modes of contacts at a plurality of positions are combined as required by optionally rotatingthe conversion drum in a rotation space by 360 degrees so as to realize circuit switch-on and isolating operation in the operating mode, the grounding mode and the workshop power supply mode respectively. High-voltage large current and the circuit connecting state of each electric component of an input power supply circuit are controlled in the conversion-drum three-position isolating mode under the operating, grounding and workshop working conditions, isolating and grounding are compounded integrally, communicating, isolating and grounding functions are realized, the number of elements is reduced, manufacturing cost is lowered and equipment reliability is improved.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components. A signal connection module includes circuitry for surge protection of the connected A / V components receiving electrical power from an adjacent wall socket. The protection circuits in the signal connection module provides an isolated ground reference for the A / V components sharing a common ground connection at the wall socket, or a power conditioning module connected thereto.

An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio / visual electronics such as DVD players, displays and the like in adjacent apertures. The signal connection modules are inserted or extracted from the face of the connection box; replacing blanking plates, and is optionally recessed from the face of the box into the wall cut-out. The configuration and mating features of the box and modules also provides for a common and isolated ground reference for surge protection of the connected components.

The invention relates to one compact structure gas insulation compound switch device, which comprises the following parts: high voltage out terminal cover tube; breaker unit; current inductance and double earth isolation unit connected to breaker unit terminal; isolation earth connection unit to breaker unit; wire in cover tube connected to high voltage wire connection terminal; double earth isolation unit composed of shell, switch and earth switch; rapid earth switch composed of static probe and switch operation structure and isolation earth switch.

The invention discloses an environment-friendly gas insulated switchgear. The top of an inflation chamber (7) is connected with a wire outlet sleeve (6) in a penetrating manner. The bottom of the inflation chamber (7) is connected in a penetrating manner with a wire inlet sleeve (10) communicated to a cable chamber (5). A three-position switch device (8) and a vacuum circuit breaker device (9) arearranged in the inflation chamber (7). A circuit breaker shaft (15) and an isolation grounding shaft (21) are both inserted into the inflation chamber (7), and the circuit breaker shaft (15) and theisolation grounding shaft (21) drive the vacuum circuit breaker device (9) and the three-position switch device (8) respectively. The environment-friendly gas insulated switchgear has a compact overall structure and reliable performance, and has a maintenance-free function. The problem that harmful insulating gas leaks to damage the environment and the problem that epoxy resin and other solid insulation bring a large amount of solid waste are solved fundamentally.