Patent
Electrical protective device
TLDR
In this paper, a tubular insulator combined with a surge arrester is used to protect a cable, its termination or other apparatus from the effect of lightning strikes on an overhead line to which the apparatus is connected.Abstract:
An electric protective device for protecting a cable, its termination or other apparatus from the effect of lightning strikes on an overhead line to which the apparatus is connected comprises a tubular insulator combined with a surge arrester and integrated by common terminals at the ground and high voltage ends. The insulator and the surge arrester are concentrically disposed about the conductor in a common insulated structure to eliminate connecting leads therebetween and the voltage drop which occurs across such leads during a rapid rise in current. The surge arrester may contribute all or part of the electrical stress grading required in the termination.read more
Citations
More filters
Patent
Circuit protection device
TL;DR: In this article, a transient voltage surge suppression system incorporating a current protection device comprised of a voltage sensitive and a thermal sensitive device was proposed, where the voltage sensitive device has a predetermined voltage rating and increases in temperature as voltage applied to it exceeds its voltage rating.
Patent
Rise pole termination/arrestor combination
TL;DR: In this paper, a surge arrestor and a cable termination are connected in parallel in a common housing, but as separate components not sharing the same axial line, and minimal lead length is provided without sacrificing serviceability.
Patent
Earth leakage trip indicator
Glennon Oliver,James Shortt +1 more
TL;DR: In this paper, the authors describe a residual current circuit breaker with a partition wall separating an over-current protection device from the residual current detection circuit, where a plunger rod 24 extends through a bore 23 in the armature 21 of a coil 20 and is moved independently through the coil 20 to trip the breaker if a residual currents is detected by the circuit.
Patent
Self testing fault circuit apparatus and method
Michael Ostrovsky,Adam Kevelos +1 more
TL;DR: A self testing fault circuit interrupter device comprising a fault circuit comprising at least one line monitoring circuit, at least 1 line interrupting circuit and at least 2 fault detector circuit is configured to selectively operate said at least line interruption circuit when a fault is detected as discussed by the authors.
Patent
Dry termination for an electric cable
TL;DR: A termination for an electric cable includes a conductive element, a shank, an insulating body, a casing of insulating material, and electric field control means.
References
More filters
Patent
EMP line filter using MOV devices
TL;DR: In this article, two cylindrical sleeves of metal oxide varistor material (MOV) are used as asapacitive elements of a low pass feedthrough pi-filter network and a metallic housing coaxially surrounds the MOV sleeves and provides electrical contact to ground.
Patent
Surge suppression transmission means
TL;DR: In a coaxial connector, a generally toroidal shaped member of metal oxide varistor material is connected between the inner and outer conductors of the connector as mentioned in this paper, which has an alpha in excess of 10 in the current density range of from 10 3 to 102 amperes per square centimeter.
Patent
Voltage limiting feed-through unit
TL;DR: In this paper, a feed-through unit of a conductor through an opening in a conducting wall is described, where the conductor together with shunt elements connected between the conductor and the wall forms a rotationally symmetrical or mirror symmetrical configuration which completely or substantially closes the opening.
Patent
Protective connector devices
TL;DR: In this article, a power connector is provided with a body of metal oxide varistor material in conductive contact with each of the electrodes thereof, and the body in contact with the electrodes are spaced to provide a standby current flow which is low when normal operating voltage appears across the electrodes and when voltages in excess of the normal voltage appear across the electrode, a rapidly decreasing impedance is presented by the body, in accordance with the alpha of the material of the body.
Patent
Capacitively graded modular pothead for h-v cable
TL;DR: Improved electrical insulating devices, preferably modular, including series connected capacitances provided by flat contacting alternated insulating and conducting elements, are presented in this article, where the insulating material between conducting elements is a resin including ceramic filler providing desirable variations in dielectric constant.