Abstract: A spark gap assembly that includes a first spark gap segment and a second spark gap segment electrically connected in series with the first spark gap segment. The first spark gap includes a first spark gap and a first grading circuit electrically connected in parallel with the first spark gap. The second spark gap segment includes a second spark gap and a second grading circuit electrically connected in parallel with the second spark gap.

Abstract: A disconnector device including an isolator connected between a first terminal and to a second terminal, and a sleeve positioned around the isolator and moveable between an un-extended position prior to the isolator operating and an extended position after the isolator operates, the sleeve being configured to trap debris produced by operation of the isolator.

Abstract: An arrester including a metal oxide varistor (MOV) disc and a spark gap assembly electrically connected in series with the MOV disc. The spark gap assembly includes a spark gap and a frequency-dependent grading capacitor electrically connected in parallel with the spark gap.

Abstract: A disconnector device including an isolator connected between a first terminal and to a second terminal, and a sleeve positioned around the isolator and moveable between an un-extended position prior to the isolator operating and an extended position after the isolator operates, the sleeve being configured to trap debris produced by operation of the isolator.

Abstract: An arrester assembly including a first terminal electrically connected to an energized conductor and a second terminal electrically connected to a ground conductor. The arrester assembly further includes a plurality of arrester modules electrically connected in series between the first terminal and the second terminal and a disconnect device electrically connected in series with the plurality of arrester modules between the first terminal and the second terminal. Components of the arrester assembly are coordinated to disconnect or isolate failed surge arresters without creating a short circuit condition.

Abstract: A disconnector device including an isolator connected between a first terminal and to a second terminal, and a sleeve positioned around the isolator and moveable between an un-extended position prior to the isolator operating and an extended position after the isolator operates, the sleeve being configured to trap debris produced by operation of the isolator.

Abstract: A spark gap assembly that includes a first spark gap segment and a second spark gap segment electrically connected in series with the first spark gap segment. The first spark gap includes a first spark gap and a first grading circuit electrically connected in parallel with the first spark gap. The second spark gap segment includes a second spark gap and a second grading circuit electrically connected in parallel with the second spark gap.

Abstract: Provided are metal oxide varistors comprising a sintered ceramic, in which the ceramic comprises, by weight, about 91.0% to about 97.0% ZnO, at least 0.3% Mn, at least 0.4% Bi, at least 1.0% Sb, and 0.50% or less Co. The metal oxide varistors as disclosed herein may exhibit reduced power dissipation, improved thermal stability, and may be produced at a lower cost relative to conventional MOV devices.

Abstract: Provided are metal oxide varistors comprising a sintered ceramic, in which the ceramic comprises, by weight, about 91.0% to about 97.0% ZnO, at least 0.3% Mn, at least 0.4% Bi, at least 1.0% Sb, and 0.50% or less Co. The metal oxide varistors as disclosed herein may exhibit reduced power dissipation, improved thermal stability, and may be produced at a lower cost relative to conventional MOV devices.

Abstract: A disconnector device including an isolator connected between a first terminal and to a second terminal, and a sleeve positioned around the isolator and moveable between an un-extended position prior to the isolator operating and an extended position after the isolator operates, the sleeve being configured to trap debris produced by operation of the isolator.

Abstract: Devices for protecting a plurality of conductors against a power surge. One device includes a first electrode positioned on a first surface of the device, a second electrode positioned on the first surface of the device, and a floating electrode positioned on a second surface of the device. The first electrode is configured to receive a surge current from a first conductor. The surge current travels through the device from the first electrode to the floating electrode and from the floating electrode to the second electrode.

Abstract: Devices for protecting a plurality of conductors against a power surge. One device includes a first electrode positioned on a first surface of the device, a second electrode positioned on the first surface of the device, and a floating electrode positioned on a second surface of the device. The first electrode is configured to receive a surge current from a first conductor.