Class 361/40 - With lightning arrester (e.g., spark gap)

Subclass of Class 361 - Electricity: electrical systems and devices
Definition: Subject matter which shunts voltage surges away from a transformer.
No. of patents: 24
Last issue date: 01/23/2007

Number	Title	Issue Date
7167007	Apparatus and method for field testing MOV arresters Embodiments test MOV arresters. One embodiment comprises applying a plurality of voltages to a high voltage lead of the MOV arrester, the plurality of voltages being changed between an initial test voltage and final test voltage (corresponding to a point of conducti...	01/23/2007
7077189	Liquid cooled thermosiphon with flexible coolant tubes A fluid heat exchanger assembly cools an electronic device with a cooling fluid supplied from a heat extractor (R, F) to a plurality of tubes extending between header tanks in an upper portion of a housing. A refrigerant is disposed in the lower portion of the housi...	07/18/2006
5912792	Mounting construction of a tank-type lightning arrester for a neutral point of a transformer A mounting construction of a tank-type lightning arrester for a neutral point of a transformer includes a transformer having a transformer winding contained within a transformer tank, the transformer winding having a neutral point, and a tank-type lightni...	06/15/1999
5892669	Electronic products with improved surge protecting circuit An improved surge protecting circuit which can protect the power source and the internal and external circuit elements of an electronic product by absorbing external surges through ground. The protecting circuit according to the present invention is conne...	04/06/1999
5757628	Stabilized high frequency switching power supply with suppressed EMI noise An improved switching power unit is of the type which uses a capacitor C1 of large capacitance value as a primary DC power supply, inputs primary DC power from the capacitor C1 to a series circuit formed of the primary winding N1 of a high-frequency trans...	05/26/1998
5590018	Arrangement of arrestors in a gas-insulated switchgear The arrestors of a compact gas insulated switchgear are to be connected to gas insulated main buses. The arrestors represent three phases, and are arranged in such a manner that the distance from a main bus which is located at the outermost position among...	12/31/1996
5317469	Arrangement of an over-voltage protection circuit A circuit arrangement having the function of preventing over-voltage damage which is structured by special copper foil or conductive wires and applies the burst absorption principle to form a short circuit from the input end and the output end of a circui...	05/31/1994
5245497	Transformer A transformer including a bobbin having a primary winding frame and a secondary winding frame, a primary coil wound around the primary winding frame, a secondary coil wound around the secondary winding frame, a pair of connection pins electrically connect...	09/14/1993
5191503	Lightning surge protector A lightning surge protector, comprises a current limiting element in a pressure-proof housing. The pressure-proof housing is composed of a conductive material and coupled with an upper electrode member. Also, a self arc-extinguishing LSP comprises a curre...	03/02/1993
5184270	Internal arc gap for secondary side surge protection and dissipation of a generated arc A system and device are disclosed for protecting the primary windings of a distribution transformer from surge current which exceed a predetermined level including a tank for accommodating the distribution transformer, a first expanding arc gap extending ...	02/02/1993
5087885	Lighting arrester tester A portable tester is disclosed for determining in the field the condition of a lightning arrester connected in parallel with a high voltage winding of a transformer. The tester comprises a battery; an inverter connected to the battery for generating an AC...	02/11/1992
4987511	Gapped arrester A gapped low voltage bushing (10) comprising a controlled spark gap (1), a metallic arc strap (18), a resistive material (46) and a metallic tank ground pad. Surges entering the transformer on any of the secondary bushings of sufficient magnitude to induc...	01/22/1991
4975797	Arrester with external isolator An arrester for an under oil transformer is connected between a primary bushing lead and an insulator/isolator penetrating the wall of a housing which encloses the oil, arrester, and transformer parts. A ground wire outside the housing is removably connec...	12/04/1990
4958250	Voltage isolation apparatus for service transformers A switching apparatus (30) provides a normally high impedance connection which is capable of switching currents with high magnitudes and high rates of rise between the primary (12) and secondary (15) neutrals of a service transformer (13), such as that us...	09/18/1990
4862307	Dual voltage distribution transformer with internal varistor surge protection This dual voltage transformer comprises a primary winding having a tap at a location intermediate its length, a first termination for connection to line voltage, and a second termination for connection to ground. When the transformer is to be operated at ...	08/29/1989
4803588	Surge arrester An underoil surge arrester (10) having metal oxide varistor disks (12) held in place by flexible spring clips (18)....	02/07/1989
4779162	Under oil arrester An arrester for use under oil in an electrical apparatus, the arrester comprising a first contact assembly, a plurality of valve blocks, a second contact assembly, and a conductive cement serially electrically connecting the first contact assembly, each o...	10/18/1988
4679113	Electrical distribution apparatus having draw-out surge arrester Electrical distribution apparatus, such as a pad-mounted electrical distribution transformer, which has an electrically grounded tank or casing. A surge arrester assembly includes a housing, and a draw-out surge arrester having first and second insulative...	07/07/1987
4621298	Dual voltage distribution transformer with internal varistor surge protection A dual voltage distribution transformer is protected by an internally installed, multi-rated surge arrester which is selectively connected with plural primary windings by a dual voltage switch such as to establish a high surge voltage protection level whe...	11/04/1986
4400754	Spark arrestor A spark arrestor for protecting a high intensity, gaseous discharge lamp, ballast and other circuit components against being damaged or destroyed by a large build up of voltage. The arrestor includes a multi-sided low dielectric disc with star-like conduc...	08/23/1983
4201883	Guard for a high voltage electrical terminal bushing A guard for a high voltage terminal bushing includes a generally circular planar isolating member of an electrically insulating material which is mounted on the upper surface of the bushing and provided with a plurality of openings through which wind and ...	05/06/1980
4153921	Thermally stabilized metal oxide varistors Zinc oxide varistor protective devices for vapor cooled transformers are integrally located in contact with the transformer coolant liquid to provide cooling capacity to the zinc oxide materials. The zinc oxide varistors are prevented from becoming electr...	05/08/1979
4063298	Insulated lightning arrester support with remote grounding control A lightning arrester is mounted on one end of a rigid insulator bar, the other end of which is mounted by a metal bracket to the grounded casing of an electrical distribution transformer. The ground terminal of the arrester is electrically connected with ...	12/13/1977
3950676	Transmission line-communications equipment coupling unit having short-circuit and overvoltage protection A transmission line carries power cables and twin wire communication lines. The coupling unit consists of an elongated, oil filled insulating body having metal caps closing off its opposite ends. The twin wires are brought to the low impedance terminals o...	04/13/1976

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Class 361/40 - With lightning arrester (e.g., spark gap)