193 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 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.

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.

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.

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.

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.