US3249719A - High voltage arrester cutout - Google Patents

High voltage arrester cutout Download PDF

Info

Publication number
US3249719A
US3249719A US404229A US40422964A US3249719A US 3249719 A US3249719 A US 3249719A US 404229 A US404229 A US 404229A US 40422964 A US40422964 A US 40422964A US 3249719 A US3249719 A US 3249719A
Authority
US
United States
Prior art keywords
arrester
cutout
terminals
disconnector
fuse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US404229A
Inventor
Donald O Misare
Philip C Henry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Joslyn Manufacturing and Supply Co
Original Assignee
Joslyn Manufacturing and Supply Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Joslyn Manufacturing and Supply Co filed Critical Joslyn Manufacturing and Supply Co
Priority to US404229A priority Critical patent/US3249719A/en
Application granted granted Critical
Publication of US3249719A publication Critical patent/US3249719A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure

Definitions

  • the present invention relates to a new and improved combination high voltage arrester cutout and more particularly, the present invention is concerned with improved lightning protection of such combination units.
  • the combination arrester cutout generally includes a dropout type fuse circuit adapted to interrupt current faults, and a suitable, externally gapped lightning arrester connected to afford protection to the cutout.
  • the lightning arrester commonly provided commercially in the combination arrester cutout is provided with a characteristic element connected serially with one or more internal isolating gaps which function to keep the main portion of the transmission system voltage off the characteristic element in the absence of surges.
  • the characteristic element serves to bypass to ground the surge current resulting from abnormal line voltages and to interrupt the flow of system follow current as soon as the abnormal condition has terminated.
  • One such lightning arrester suitable for use in the present invention is illustrated and described in the co-pending application of Edward H.
  • the fuse cutout may also be of a type known in the art and, more specifically, may be similar to the fused cutout assembly more fully described in United States Patent 2,862,082
  • the lightning arrester is serially connected with an explosive type disconnector between the external lead of the high voltage component and the ground.
  • an explosive type disconnector is illustrated and disclosed in Riley Patent No. 3,100,246 granted August 6, 1963 on aDisconnector, and assigned to the same assignee as the present invention.
  • the disconnector has adequate time delay so that discharges through the lightning arrester unit, sufficient to cause failure of the lightning arrester, will thereafter explode the charge and the disconnector and will consequently break to remove'the arrester from the electrical transmission circuit.
  • a failured arrester in a combination arrested cutout can be readily detected, in the meantime the fuse cutout isaiforded no protection whatsoever by the arrester unit and subsequent overvoltage conditions may cause the fuse cutout to interrupt the'transmission line component.
  • a further object of the present invention is to provide a new and improved high voltage combination arrester cutout.
  • a further object of the present invention is to provide a new and improved high voltage combination arrester cutout unit which will provide a visual indication of a failed arrester, and will additionally provide continued protection to the fuse cutout against lightning surges during the interim period between the failure of the arrester and replacement thereof.
  • a combination arrester cutout unit for high voltage distribution systems.
  • the cutout is of the dropout type fuse assembly including an insulator having stationary terminal members carried at opposite ends thereof adapted for connection to high voltage components of the transmission system, and a dropout-fuse tube having a fuse link capable of interruption upon abnormal amperage faults and normally electrically interconnecting the terminals.
  • An externally gapped lightning arrester of the type having an insulating shell housing a characteristic element formed of valve material in series with internal isolating gaps is connected to one terminal of the cutout through an external gap structure to form an external atmospheric isolating gap betwen the lightning arrester and the fuse cutout.
  • an explosive type disconnector is connected across the external gap.
  • the explosive disconnector is connected by means of prestressed resilient spring which is effective to snap free of the lightning arrester upon an explosive failure of the disconnector.
  • a combination arrester cutout unit not only provides a ready visual indication of a failured arrester on the cutout, but additionally affords continued protection to the fuse cutout against lightning surges during the interim period between the failure of the arrester and replacement thereof.
  • FIGURE 1 is an elevational view of a combination.
  • FIGURE 2 is a fragmentary view of the combination arrester cutout of FIGURE 1, illustrated after a failure of the explosive disconnector.
  • the fuse assembly 11 may be similar to the fuse assembly more fully described in the aforementioned US. Patent 2,862,082. Briefly, the fuse assembly 11 includes an elongated insulator 13 supported by a suitable bracket 14 from a transmission line superstructure. Upper and lower stationary terminal members 15 and 16 are carried at opposite ends of the insulator 13 for connection to the high voltage transmission line component.
  • the lower terminal member 16 is provided with a pair of trunnion supports in the form of hook members 18 which are spaced apart and which are provided with overhanging portions 19.
  • the upper terminal member 15 is also provided with a suitable trunnion portion 20.
  • the upper and lower terminal members and 16 are provided with suitable means for connection to a high voltage transmission line.
  • a dropout fuse structure generally illustrated at 25, includes a fuse tube or cartridge 26 having a downwardly and rearwardly extending arm 27 extending from the lower end thereof and provided with a cross-trunnion 28 hooked in the hook members 18 to pivotally interconnect the fuse tube 26 to the lower terminal member 16.
  • the fuse structure further includes an upper terminal 30 adapted to hook or engage the trunnion portion 25) of the upper terminal member 15 to provide electrical contact with the fuse tube 26.
  • the fuse assembly 11 is provided with a suitable fuse link 32, the upper end of which is secured to the upper terminal 30.
  • the lower end of the fuse line 32 extends through the open lower end of the fuse tube 26 and is secured to suitable spring structure 37 adapted to snap the fuse link 32 out of the tube 26 upon rupture of the fuse link 32.
  • the fuse link 26 will fail upon abnormal amperage fault such as continuous shorts to ground.
  • the lightning arrester 12 discharges abnormal lightning surges to ground thereby protecting with suitable internal isolating spark ga means within the housing 42 and electrically connected serially between the terminals 43 and 44.
  • the lightning arrester 12 is supported on a bracket 48 supported by the bracket 14.
  • One terminal 44 is adapted to be connected to ground potential.
  • An external electrode 50 is electrically connected to the other terminal 43 and it is provided with an electrode portion 50a spaced apart from an opposed electrode 51 connected to the terminal 15 to provide an external isolating spark gap 52. If desired, the external electrodes 50 and 51 may provide for adjustability of the length of the isolating gap 52 in a known manner.
  • the combination arrester cutout 10 additionally includes an explosive disconnector 54.
  • the explosive disconnector 54 may be of the type described in and claimed in the abovementioned Riley patent and, accordingly, need not be herein described in detail.
  • a known explosive disconnector 20 includes a housing 55 having at one end a thin, fracturable section 56.
  • the disconnector 54 includes a first terminal connected to one terminal 43 of the lightning arrester 18 and having a second terminal 58 connected to the upper terminal 15 of the fuse cutout assembly 11 by a suitable conductor 60.
  • the disconnector 54 includes a threaded second terminal 58.
  • Serially connected between the terminals of the disconnector within the housing 55 is a suitable explosive material.
  • the disconnector 54 has an adequate time lag upon a destructive discharge through the lightning arrester unit 15 that the lightning arrester 15 would first fail, and thereafter the explosive material in the disconnector 54 would explode, rupturing the housing 55 along the line 56 and separating the terminals thereof.
  • the conductor 60 may be a pre-stressed leaf spring of electrically conductive material. As illustrated, the spring conductor 60 has one end connected to the terminal 58 of the explosive disconnector :and the other end connected to the terminal 15 of the fuse assembly.
  • the lightning arrester unit includes an externally gapped lightning arrester 12 provided with an explosive disconnector 54 connected to a high voltage lead 15 of the fuse cutout by means of a suitable conductor 60.
  • the conductor 60 and the explosive disconnector 54 are serially connected across the external isolating gap 52 of the lightning arrester 12. If a discharge occurs through the lightning arrester unit 12 of suflicient magnitude to cause failure of the lightning arrester 12, the lightning arrester 12 then acts as a short and, with suitable time delay, the explosive material in the explosive disconnector 54 will be fired, rupturing the explosive disconnector 54 breaking the circuit through the disconnector.
  • the conductor 60 consists of a prestressed spring
  • the spring will aid in snapping the upper terminal 58 of the explosive disconnector 54 apart from the remainder of the disconnector.
  • This provides a visual indication of a defective lightning arrester unit, as best illustrated in FIGURE 2.
  • the lightning arrester unit 12 continues to afford continued protection against lightning surges during the interim period after failure and before replacement of the lightning arrester unit 12 due to the external isolating spark gap 52.
  • the lightning arrester unit 12 after firing of the explosive disconnector 54 affords reduced resistance to ground which may result in occasional blowing of the component fuses, nevertheless adequate protection is afforded to prevent destruction of the high voltage system.
  • a combination arrestor cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including spaced cutout terminals and means including a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; a lightning arrester for passing abnormal voltage surges to ground; a pair of spaced apart spark gap terminals defining an external isolating gap; said lightning arrester and said gap being normally serially electrically connected between ground and one of said cutout terminals; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to said arrester disconnector means, said arrester disconnector means explosively isolating said spark gap terminals from one another upon an over voltage condition, said disconnector means and said electrical conducting means indicating a failure of the lightning arrester, said gap provid ing protection after isolating by said arrester disconnector means.
  • a combination arrester cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including an insulator and spaced cutout terminals carried by said insulator and adapted for connection to distribution components, a dropout fuse tube carried by said insulator and having a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; bracket means adapted to support said insulator from a transmission system component; a lightning arrester mounted on said bracket for passing abnormal voltage surges to ground and being of the type having an insulating shell carrying spaced terminal means and housing a characteristic element in series with an isolating gap, said characteristic element being formed of valve material having a nonlinear resistance; a pair of spaced apart spark gap terminals defining an external isolating gap, said lightning arrester and said gap being normally serially electrically connected between ground and one of said cutout terminals; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to
  • a combination arrester cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including spaced cutout terminals and means including a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; a lightning arrester pro- 6 vided with a pair of spaced terminal means for passing abnormal voltage surges to ground; a pair of spaced apart spark gap terminals defining an external isolating gap; one of said spark gap terminals being electrically connected to one of said terminal means and the other of said spark gap terminals being electrically connected to one of said cutout terminals; the other of said terminal means being adapted normally to be serially electrically connected to ground; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to said arrester disconnector means, said arrester disconnector means explosively isolating said spark gap terminals from one another upon an over voltage condition, said disconnector means and said electrical conducting means indicating a failure of the lightning arrest

Landscapes

  • Thermistors And Varistors (AREA)

Description

y 3, 1966 D. o. MISARE ET AL HIGH VOLTAGE ARRESTER CUTOUT Filed Oct. 16, 1964 INVENTQRS: DONALD O. MISARE PHILIP C. HENRY mrqwQMemmQmd ig ATT 'YS' customer standpoint.
United States Patent 3,249,719 HIGH VOLTAGE ARRESTER CUTOUT Donald 0. Misare, Riverside, Ill., and Philip C. Henry,
St. Petersburg, Fla., assignors to Joslyn Mfg. and Supp yCm, Chicago, Ill., a corporation of Illinois Filed Oct. 16, 1964, Ser. No. 404,229 7 Claims. (Cl. 200-115) The present invention relates to a new and improved combination high voltage arrester cutout and more particularly, the present invention is concerned with improved lightning protection of such combination units.
Combination arrester cutout assemblies for use on high voltage transmission'structure are commercially available. The combination arrester cutout generally includes a dropout type fuse circuit adapted to interrupt current faults, and a suitable, externally gapped lightning arrester connected to afford protection to the cutout. The lightning arrester commonly provided commercially in the combination arrester cutout is provided with a characteristic element connected serially with one or more internal isolating gaps which function to keep the main portion of the transmission system voltage off the characteristic element in the absence of surges. The characteristic element serves to bypass to ground the surge current resulting from abnormal line voltages and to interrupt the flow of system follow current as soon as the abnormal condition has terminated. One such lightning arrester suitable for use in the present invention is illustrated and described in the co-pending application of Edward H.
Yonkers, Serial No. 157,293, filed November 16, 1961,
on Valve Type Lightning Arrester, and assigned to thesame-assignee as the present invention. The fuse cutout may also be of a type known in the art and, more specifically, may be similar to the fused cutout assembly more fully described in United States Patent 2,862,082
and assigned to the same assignee as the present invention.
In the type of commercial installation described above, difliculty has been experienced in that if the lightning arrester fails, due'to abnormal load conditions such as excessive voltages or direct lightning strikes, the arrester willfail and will afford no internal resistance to ground. Accordingly, the only protection of the transmission line component against an open short to the ground is afforded by the external gap formed in the lightning arrester system. Any small over-voltage would be sufiicient to spark the external gap or to cause discharge in the gap, and the discharge would be sufiicient on over-voltages to cause continuous and repetitious blowing of the component fuses. Not only is it necessary to afford fuse protection, but such repetitive line failures are undesirable from the It is difficult to detect such a failed lightning arrester so that replacement may be made.
In another type of lightning protector system, the lightning arrester is serially connected with an explosive type disconnector between the external lead of the high voltage component and the ground. One suitable disconnector is illustrated and disclosed in Riley Patent No. 3,100,246 granted August 6, 1963 on aDisconnector, and assigned to the same assignee as the present invention. The disconnector has adequate time delay so that discharges through the lightning arrester unit, sufficient to cause failure of the lightning arrester, will thereafter explode the charge and the disconnector and will consequently break to remove'the arrester from the electrical transmission circuit. Although such a failured arrester in a combination arrested cutout can be readily detected, in the meantime the fuse cutout isaiforded no protection whatsoever by the arrester unit and subsequent overvoltage conditions may cause the fuse cutout to interrupt the'transmission line component.
3,249,719 Patented May 3, 1966 "ice Accordingly, it is an object of the present invention to provide an improved high voltage combination arrester cutout which overcomes the above-mentioned difficulties.
A further object of the present invention is to provide a new and improved high voltage combination arrester cutout.
A further object of the present invention is to provide a new and improved high voltage combination arrester cutout unit which will provide a visual indication of a failed arrester, and will additionally provide continued protection to the fuse cutout against lightning surges during the interim period between the failure of the arrester and replacement thereof.
Further objects and advantages of the present invention will become apparent as the following description proceeds and the features of novelty which characterize the invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.
In accordance with these and many other objects of the present invention, there is provided a combination arrester cutout unit for high voltage distribution systems. The cutout is of the dropout type fuse assembly including an insulator having stationary terminal members carried at opposite ends thereof adapted for connection to high voltage components of the transmission system, and a dropout-fuse tube having a fuse link capable of interruption upon abnormal amperage faults and normally electrically interconnecting the terminals. An externally gapped lightning arrester of the type having an insulating shell housing a characteristic element formed of valve material in series with internal isolating gaps is connected to one terminal of the cutout through an external gap structure to form an external atmospheric isolating gap betwen the lightning arrester and the fuse cutout. In
accordance with the present invention, an explosive type disconnector is connected across the external gap. In one embodiment of the invention, the explosive disconnector is connected by means of prestressed resilient spring which is effective to snap free of the lightning arrester upon an explosive failure of the disconnector.
Advantageously a combination arrester cutout unit according to the present invention not only provides a ready visual indication of a failured arrester on the cutout, but additionally affords continued protection to the fuse cutout against lightning surges during the interim period between the failure of the arrester and replacement thereof.
For a better understanding of the present invention, reference may be had to the accompanying drawing wherein:
FIGURE 1 is an elevational view of a combination.
arrester cutout unit according to the present invention; and
FIGURE 2 is a fragmentary view of the combination arrester cutout of FIGURE 1, illustrated after a failure of the explosive disconnector.
Referring now to the drawings, there is illustrated a high voltage combination :arrester cutout 10 including a dropout type fuse assembly 11 and a lightning arrester 12. The fuse assembly 11 may be similar to the fuse assembly more fully described in the aforementioned US. Patent 2,862,082. Briefly, the fuse assembly 11 includes an elongated insulator 13 supported by a suitable bracket 14 from a transmission line superstructure. Upper and lower stationary terminal members 15 and 16 are carried at opposite ends of the insulator 13 for connection to the high voltage transmission line component. The lower terminal member 16 is provided with a pair of trunnion supports in the form of hook members 18 which are spaced apart and which are provided with overhanging portions 19. The upper terminal member 15 is also provided with a suitable trunnion portion 20. The upper and lower terminal members and 16 are provided with suitable means for connection to a high voltage transmission line.
A dropout fuse structure, generally illustrated at 25, includes a fuse tube or cartridge 26 having a downwardly and rearwardly extending arm 27 extending from the lower end thereof and provided with a cross-trunnion 28 hooked in the hook members 18 to pivotally interconnect the fuse tube 26 to the lower terminal member 16. The fuse structure further includes an upper terminal 30 adapted to hook or engage the trunnion portion 25) of the upper terminal member 15 to provide electrical contact with the fuse tube 26.
The fuse assembly 11 is provided with a suitable fuse link 32, the upper end of which is secured to the upper terminal 30. The lower end of the fuse line 32 extends through the open lower end of the fuse tube 26 and is secured to suitable spring structure 37 adapted to snap the fuse link 32 out of the tube 26 upon rupture of the fuse link 32.
It is understood that the fuse link 26 will fail upon abnormal amperage fault such as continuous shorts to ground. However, the lightning arrester 12 discharges abnormal lightning surges to ground thereby protecting with suitable internal isolating spark ga means within the housing 42 and electrically connected serially between the terminals 43 and 44. The lightning arrester 12 is supported on a bracket 48 supported by the bracket 14. One terminal 44 is adapted to be connected to ground potential. An external electrode 50 is electrically connected to the other terminal 43 and it is provided with an electrode portion 50a spaced apart from an opposed electrode 51 connected to the terminal 15 to provide an external isolating spark gap 52. If desired, the external electrodes 50 and 51 may provide for adjustability of the length of the isolating gap 52 in a known manner.
In accordance with the present invention, the combination arrester cutout 10 additionally includes an explosive disconnector 54. The explosive disconnector 54 may be of the type described in and claimed in the abovementioned Riley patent and, accordingly, need not be herein described in detail. However, briefly, as best illustrated in FIGURE 3, a known explosive disconnector 20 includes a housing 55 having at one end a thin, fracturable section 56. The disconnector 54 includes a first terminal connected to one terminal 43 of the lightning arrester 18 and having a second terminal 58 connected to the upper terminal 15 of the fuse cutout assembly 11 by a suitable conductor 60. Additionally the disconnector 54 includes a threaded second terminal 58. Serially connected between the terminals of the disconnector within the housing 55 is a suitable explosive material. The disconnector 54 has an adequate time lag upon a destructive discharge through the lightning arrester unit 15 that the lightning arrester 15 would first fail, and thereafter the explosive material in the disconnector 54 would explode, rupturing the housing 55 along the line 56 and separating the terminals thereof.
It is understood that an explosive rupture of the disconnector 54 will drive the terminal 58 and connected housing free of the lightning arrester 12 to break the circuit thereto. The normal stiffness of the conductor 60, made of copper or other suitable conducting material, will maintain the disconnector 54 separated. However, if desired, in order to snap the disconnector 54 free upon explosion of the material therein, the conductor 60 may be a pre-stressed leaf spring of electrically conductive material. As illustrated, the spring conductor 60 has one end connected to the terminal 58 of the explosive disconnector :and the other end connected to the terminal 15 of the fuse assembly.
From the above detailed description, the operation of the improved combination arrester cutout unit is believed clear. However, briefly, it will be understood that the lightning arrester unit includes an externally gapped lightning arrester 12 provided with an explosive disconnector 54 connected to a high voltage lead 15 of the fuse cutout by means of a suitable conductor 60. The conductor 60 and the explosive disconnector 54 are serially connected across the external isolating gap 52 of the lightning arrester 12. If a discharge occurs through the lightning arrester unit 12 of suflicient magnitude to cause failure of the lightning arrester 12, the lightning arrester 12 then acts as a short and, with suitable time delay, the explosive material in the explosive disconnector 54 will be fired, rupturing the explosive disconnector 54 breaking the circuit through the disconnector. If the conductor 60 consists of a prestressed spring, the spring will aid in snapping the upper terminal 58 of the explosive disconnector 54 apart from the remainder of the disconnector. This provides a visual indication of a defective lightning arrester unit, as best illustrated in FIGURE 2. Advantageously the lightning arrester unit 12 according to the present invention, continues to afford continued protection against lightning surges during the interim period after failure and before replacement of the lightning arrester unit 12 due to the external isolating spark gap 52. Although the lightning arrester unit 12 after firing of the explosive disconnector 54 affords reduced resistance to ground which may result in occasional blowing of the component fuses, nevertheless adequate protection is afforded to prevent destruction of the high voltage system.
Although the present invention has been described by reference to a single embodiment thereof, it will be apparent that numerous other modifications and embodiments will be devised by those skilled in the art which will fall within the true spirit and scope of the present invention.
What is claimed as new and desired to be secured by Letters Patent of the United States is:
1. A combination arrestor cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including spaced cutout terminals and means including a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; a lightning arrester for passing abnormal voltage surges to ground; a pair of spaced apart spark gap terminals defining an external isolating gap; said lightning arrester and said gap being normally serially electrically connected between ground and one of said cutout terminals; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to said arrester disconnector means, said arrester disconnector means explosively isolating said spark gap terminals from one another upon an over voltage condition, said disconnector means and said electrical conducting means indicating a failure of the lightning arrester, said gap provid ing protection after isolating by said arrester disconnector means.
2. The structure defined by claim 1 wherein the electrical conducting means connected across the gap comprises a deflectable member normally disposed in a predetermined position in engagement with said arrestor disconnector means but deflectable to a different position in the event of operation of said arrester disconnector means.
3. The structure defined by claim 1 wherein the lightg arrester and the fuse unit are carried upon a com- 5. mon support bracket which, in turn, is mountable upon at least one distribution system component.
4. A combination arrester cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including an insulator and spaced cutout terminals carried by said insulator and adapted for connection to distribution components, a dropout fuse tube carried by said insulator and having a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; bracket means adapted to support said insulator from a transmission system component; a lightning arrester mounted on said bracket for passing abnormal voltage surges to ground and being of the type having an insulating shell carrying spaced terminal means and housing a characteristic element in series with an isolating gap, said characteristic element being formed of valve material having a nonlinear resistance; a pair of spaced apart spark gap terminals defining an external isolating gap, said lightning arrester and said gap being normally serially electrically connected between ground and one of said cutout terminals; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to said arrester disconnector means, said arrester disconnector means explosively isolating said spark gap terminals from one another upon an over voltage condition, said disconnector means and said electrical conducting means indicating a failure of the lightning arrester, said gap providing protection after isolating by said arrester disconnector means.
5. A combination arrester cutout unit for use with a high voltage power distribution system comprising: a dropout type fuse unit including spaced cutout terminals and means including a fuse link capable of interruptions upon abnormal amperage faults and normally electrically connected across said terminals; a lightning arrester pro- 6 vided with a pair of spaced terminal means for passing abnormal voltage surges to ground; a pair of spaced apart spark gap terminals defining an external isolating gap; one of said spark gap terminals being electrically connected to one of said terminal means and the other of said spark gap terminals being electrically connected to one of said cutout terminals; the other of said terminal means being adapted normally to be serially electrically connected to ground; arrester disconnector means electrically connected to one of said spark gap terminals; and electrical conducting means electrically connecting the other of said spark gap terminals to said arrester disconnector means, said arrester disconnector means explosively isolating said spark gap terminals from one another upon an over voltage condition, said disconnector means and said electrical conducting means indicating a failure of the lightning arrester, said gap providing protection after isolating by said arrester disconnector means.
6. The structure defined by claim 5 wherein the electrical conducting means connected across the gap comprises a defiectable member normally disposed in a predetermined position in engagement with said arrester disconnector means but deflectable to a different position in the event of operation of said arrester disconnector means.
7. The structure defined by claim 5 wherein the lightning arrester and the fuse unit are carried upon a common support bracket which, in turn, is mountable upon at least one distribution system component.
References Cited by the Examiner UNITED STATES PATENTS 2,971,132 2/1961 Nash 200-11s X 3,038,046 6/1961 Devine et a1. 200- X BERNARD A. GILHEANY, Primary Examiner.
H. A. LEWITTER, Assistant Examiner. I

Claims (1)

1. A COMBINATION ARRESTOR CUTOUT UNIT FOR USE WITH A HIGH VOLTAGE POWER DISTRIBUTION SYSTEM COMPRISING: A DROPOUT TUPE FUSE UNIT INCLUDING SPACED CUTOUT TERMINALS AND MEANS INCLUDING A FUSE LINK CAPABLE OF INTERRUPTIONS UPON ABNORMAL AMPERAGE FAULTS AND NORMALLY ELECTRICALLY CONNECTED ACROSS SAID TERMINALS; A LIGHTNING ARRESTER FOR PASSING ABNORMAL VOLTAGE SURGES TO GROUND; A PAIR OF SPACED APART SPARK GAP TERMINALS DEFINING AN EXTERNAL ISOLATING GAP; SAID LIGHTNING ARRESTER AND SAID GAP BEING NORMALLY SERIALLY ELECTRICALLY CONNECTED BETWEEN GROUND AND ONE OF SAID CUTOUT TERMINALS; ARRESTER DISCONNECTOR MEANS ELECTRICALLY CONNECTED TO ONE OF SAID SPARK GAP TERMINALS; AND ELECTRICAL CONDUCTING MEANS ELECTRICALLY CONNECTING THE OTHER OF SAID SPARK GAP TERMINALS TO SAID
US404229A 1964-10-16 1964-10-16 High voltage arrester cutout Expired - Lifetime US3249719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US404229A US3249719A (en) 1964-10-16 1964-10-16 High voltage arrester cutout

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US404229A US3249719A (en) 1964-10-16 1964-10-16 High voltage arrester cutout

Publications (1)

Publication Number Publication Date
US3249719A true US3249719A (en) 1966-05-03

Family

ID=23598720

Family Applications (1)

Application Number Title Priority Date Filing Date
US404229A Expired - Lifetime US3249719A (en) 1964-10-16 1964-10-16 High voltage arrester cutout

Country Status (1)

Country Link
US (1) US3249719A (en)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733572A (en) * 1970-12-24 1973-05-15 Mc Graw Edison Co Current limiting fuse
US5128648A (en) * 1990-01-22 1992-07-07 Brandi Frank J Line cutout for electrical distribution system
US5940259A (en) * 1997-07-03 1999-08-17 Pacific Scientific Company Voltage surge protector for electronic circuits with semiconductor components
US20030231097A1 (en) * 2002-06-16 2003-12-18 Victor Almgren Composite insulator for fuse cutout
US20040187433A1 (en) * 2000-12-26 2004-09-30 Barker James W. Method and arrangement for providing a gas-tight housing joint
US6831232B2 (en) 2002-06-16 2004-12-14 Scott Henricks Composite insulator
US7028998B2 (en) 2001-04-30 2006-04-18 Maclean-Fogg Company Stabilizer bar
US20070139850A1 (en) * 2005-12-15 2007-06-21 Raycap Corporation Overvoltage protection devices including wafer of varistor material
US20090079533A1 (en) * 2004-12-06 2009-03-26 Cooper Technologies Company Current Limiting Fuse
US20090153286A1 (en) * 2007-12-14 2009-06-18 Maclean-Fogg Company Insulator for cutout switch and fuse assembly
US20100148913A1 (en) * 2008-12-16 2010-06-17 Wayne Hemmingway Fuse element retaining device
US20120032772A1 (en) * 2010-08-04 2012-02-09 Cooper Technologies Company Joining a current limiting device and a fuse
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US20160056004A1 (en) * 2014-08-20 2016-02-25 The Trustees For The Time Being Of The Philip Edward Lawrence Risi Trust Electrical protection assembly
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
USD928106S1 (en) * 2018-02-07 2021-08-17 Kokusai Electric Corporation Supporting column of insulation unit for semiconductor manufacturing apparatus
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices
US12199412B2 (en) 2022-06-02 2025-01-14 Ripd Ip Development Ltd. Surge protective devices, circuits, modules and systems including same
US12206234B2 (en) 2022-09-20 2025-01-21 Ripd Ip Development Ltd Overvoltage protection device modules
US12437906B2 (en) 2022-10-18 2025-10-07 Raycap, S.A. Surge protective devices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971132A (en) * 1958-06-30 1961-02-07 Mc Graw Edison Co Lightning arrester constructions
US3038046A (en) * 1960-05-18 1962-06-05 Mc Graw Edison Co Combined cutout and lightning arrester bracket assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971132A (en) * 1958-06-30 1961-02-07 Mc Graw Edison Co Lightning arrester constructions
US3038046A (en) * 1960-05-18 1962-06-05 Mc Graw Edison Co Combined cutout and lightning arrester bracket assembly

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733572A (en) * 1970-12-24 1973-05-15 Mc Graw Edison Co Current limiting fuse
US5128648A (en) * 1990-01-22 1992-07-07 Brandi Frank J Line cutout for electrical distribution system
US5940259A (en) * 1997-07-03 1999-08-17 Pacific Scientific Company Voltage surge protector for electronic circuits with semiconductor components
US7041913B2 (en) 2000-12-26 2006-05-09 Barker Jr James W Method and arrangement for providing a gas-tight housing joint
US20040187433A1 (en) * 2000-12-26 2004-09-30 Barker James W. Method and arrangement for providing a gas-tight housing joint
US7180004B2 (en) 2000-12-26 2007-02-20 Maclean-Fogg Company Method and arrangement for providing a gas-tight joint
US20060118327A1 (en) * 2000-12-26 2006-06-08 S&C Electric Company And Maclean Power, L.L.C. Method and arrangement for providing a gas-tight joint
US7028998B2 (en) 2001-04-30 2006-04-18 Maclean-Fogg Company Stabilizer bar
US6831232B2 (en) 2002-06-16 2004-12-14 Scott Henricks Composite insulator
US6952154B2 (en) 2002-06-16 2005-10-04 Maclean-Fogg Company Composite insulator for fuse cutout
US20030231097A1 (en) * 2002-06-16 2003-12-18 Victor Almgren Composite insulator for fuse cutout
US8035473B2 (en) * 2004-12-06 2011-10-11 Cooper Technologies Company Current limiting fuse
US20090079533A1 (en) * 2004-12-06 2009-03-26 Cooper Technologies Company Current Limiting Fuse
US7834738B2 (en) * 2004-12-06 2010-11-16 Cooper Technologies Company Current limiting fuse
US20110025448A1 (en) * 2004-12-06 2011-02-03 Cooper Technologies Company Current Limiting Fuse
US20070139850A1 (en) * 2005-12-15 2007-06-21 Raycap Corporation Overvoltage protection devices including wafer of varistor material
US7433169B2 (en) 2005-12-15 2008-10-07 Raycap Corporation Overvoltage protection devices including wafer of varistor material
US20090153286A1 (en) * 2007-12-14 2009-06-18 Maclean-Fogg Company Insulator for cutout switch and fuse assembly
US7646282B2 (en) 2007-12-14 2010-01-12 Jiri Pazdirek Insulator for cutout switch and fuse assembly
US20100102919A1 (en) * 2007-12-14 2010-04-29 Jiri Pazdirek Insulator for Cutout Switch and Fuse Assembly
US8169293B2 (en) * 2008-12-16 2012-05-01 Wayne Hemmingway Fuse element retaining device
US20100148913A1 (en) * 2008-12-16 2010-06-17 Wayne Hemmingway Fuse element retaining device
US20120032772A1 (en) * 2010-08-04 2012-02-09 Cooper Technologies Company Joining a current limiting device and a fuse
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US10340688B2 (en) 2014-06-03 2019-07-02 Ripd Ip Assets Ltd Modular overvoltage protection units
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
US20160056004A1 (en) * 2014-08-20 2016-02-25 The Trustees For The Time Being Of The Philip Edward Lawrence Risi Trust Electrical protection assembly
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10734176B2 (en) 2016-11-30 2020-08-04 Raycap, Surge Protective Devices, Ltd. Surge protective device modules and DIN rail device systems including same
US11165246B2 (en) 2016-12-23 2021-11-02 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US12237664B2 (en) 2016-12-23 2025-02-25 Ripd Research And Ip Development Ltd. Devices for active overvoltage protection including varistors and thyristors
US11881704B2 (en) 2016-12-23 2024-01-23 Ripd Research And Ip Development Ltd. Devices for active overvoltage protection including varistors and thyristors
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US11374396B2 (en) 2016-12-23 2022-06-28 Ripd Research And Ip Development Ltd. Devices for active overvoltage protection
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10679814B2 (en) 2017-05-12 2020-06-09 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
USD928106S1 (en) * 2018-02-07 2021-08-17 Kokusai Electric Corporation Supporting column of insulation unit for semiconductor manufacturing apparatus
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices
US12199412B2 (en) 2022-06-02 2025-01-14 Ripd Ip Development Ltd. Surge protective devices, circuits, modules and systems including same
US12206234B2 (en) 2022-09-20 2025-01-21 Ripd Ip Development Ltd Overvoltage protection device modules
US12437906B2 (en) 2022-10-18 2025-10-07 Raycap, S.A. Surge protective devices

Similar Documents

Publication Publication Date Title
US3249719A (en) High voltage arrester cutout
US4062054A (en) Multi-function fail-safe arrangements for overvoltage gas tubes
US5237482A (en) High voltage surge arrester with failed surge arrester signaling device
RU2155402C2 (en) Unit of discharger protecting against overvoltage
US2971132A (en) Lightning arrester constructions
US3869650A (en) Disconnector
US4320432A (en) High voltage transformer bushing fuse and arrester arrangement
US5434550A (en) Arrester disconnector
US3281625A (en) Over-voltage protection techniques
US4204238A (en) Surge voltage lightning arresters
US3400301A (en) Lightning arrester in combination with an arrester disconnector containing explosivemeans
US4188561A (en) Station protector spark gap applique
US12438355B2 (en) Overvoltage protection spark gap assembly and method for operating an overvoltage protection spark gap assembly
US3249815A (en) Lightning arrester in combination with an arrester disconnector having a spark gap in parallel with the disconnector
US4866562A (en) Self-contained air gap assembly
JP2718169B2 (en) Surge absorber with security function
US3448343A (en) Combined overvoltage protective device and conductor support
US4326231A (en) Clip-on protector
US5400207A (en) Isolator-arrester assembly
US4191987A (en) Clip-on protector
US2295320A (en) Electric discharge device
US3993933A (en) Electric overvoltage gas arrester with metallic shorting mechanism
US2663817A (en) Lightning arrester
US3518483A (en) Fused pressure relief means for overvoltage protective device
US2802150A (en) Street lighting control unit