US3702371A - Spacer-damper for electrical power lines - Google Patents

Spacer-damper for electrical power lines Download PDF

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Publication number
US3702371A
US3702371A US106998A US3702371DA US3702371A US 3702371 A US3702371 A US 3702371A US 106998 A US106998 A US 106998A US 3702371D A US3702371D A US 3702371DA US 3702371 A US3702371 A US 3702371A
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US
United States
Prior art keywords
spacer
damper
arm
conductors
carrying member
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
US106998A
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English (en)
Inventor
Walter Bloch
Christopher Richard Stevens
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.)
Bowthorpe Hellerman Ltd
Original Assignee
Bowthorpe Hellerman Ltd
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 Bowthorpe Hellerman Ltd filed Critical Bowthorpe Hellerman Ltd
Application granted granted Critical
Publication of US3702371A publication Critical patent/US3702371A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/12—Devices for maintaining distance between parallel conductors, e.g. spacer
    • H02G7/125—Damping spacers

Definitions

  • a I spacer for spacing a plurality of line conductors, the spacer including a plurality of spacer arms one for each conductor, relatively movable jaws on eacharm to engage and clamp on to its respective conductor, an arm carrying member from which. the spacer arms extend, and weight means secured to the arm carrying member for damping movements of the conductors.
  • Each head 6 also includes a pair of parallel bores in each of which is received an end of a respective one of a pair of comparatively flexible elongate members, such as stranded steel cables 13, and an end margin of a sheath 11 which encases its respective elongate member. and stops short of the end of the stranded cable 13-.
  • the sheaths provide protection of the elongate members from the natural elements and may be selected from materials including polyvinylchloride, cross-linked polyethylene, butyl rubber and chlorosulphonated polyethylene.
  • Each head is compressed by for example compression crimping on to the cable and sheath end to secure the head to the elongate memberand also to seal the end of the sheath 1].
  • thesheath end may'not extend into its respective bore but may be sealed on to the outer annular surface of that portion of the head defining the bore.
  • each base 12 At the end of each pair of sheathed members remote from their respective heads is a respective one of four bases 12 each having bores for receiving andengaging the sheathed members in like manner to the head.
  • Each base also includes a semi-cylindrical recess 14 to receive the tube 1 and two bores for receiving securing bolts '15.
  • the bases of two arms are bolted by bolts 15 to diametrically opposite sides of the tube at each end of the tube, 3 and 4 at one end, 2 and 5 at the other end, the arms on like sides of the tube (2, 4 and 3, 5) being oppositely directed.
  • weights 16 To each end of the tube are secured weights 16 by v bolts 17, the weights serving to dampen any movement of the conductors.
  • the weights 16 in association with the flexible elongate members are designed so that the I natural resonances of the spacer lie outside thecritical thereby allowing a much better frequency response with respect to damping to be achievedthan has hitherto'been attainable.
  • the above described spacer can be modified to suit the requirements of each individual spacer application.
  • the total weight of the spacer may be adjusted to alter the extentto which the spacer inhibits or breaks up vertical oscillations of the conductors,1and the angle subtended by the arms with respect to the longitudinal axis of tube 1 may be alteredto vary the sensitivity of the spacer to vertical and horizontal oscillations of the conductors.
  • the spring rate of the flexible elongate members may also be altered in conjunction with the mass and inertia of the weights 16 to vary the overall response of the spacer to conductor movements; further the center to center'spacing of the conductor clamping'heads 6 can be altered to allow a spacer suitable fora given conductor size to be arranged to suit a multiplicity of conductor spacings.
  • tube 1 In place of tube 1, an elongate thin plate may be used; also, a single elongate member may be employed inplace of the two elongate-members described'above for each head 6.
  • Stops may be provided to engage the heads 6 and hence limit the inward motion of the spacer arms, particularly as a result of a short circuit on a line conductor; the stops may be positioned in the region of the weights 16 or may be combined with the weights.
  • a spacer-damper for spacing a plurality of substantially paralleloverhead electrical line conductors and damping out vibrations therein, said spacerdamper comprising a plurality of elongate and inextenrange of vibration of the overhead line conductors sible spacer arms, one for 'each conductor, a clamp means on each arm for clamping onto its respective line conductor, and a spacer arm carrying member of elongate tubular form and comprising an inertial mass'and from which the spacer arms extend, the improvement according to which said member comprises an inertial mass selected to maintain the natural resonances of said spacer outside the critical range of vibrations of said line conductors, and at least one of the spacer arms clamped to two adjacent conductors is resiliently flexible over a substantial portion of its length transversely to said conductors so as to permit said conductors to move towards and away from one another against said resilience.
  • a spacer-damper as claimed in claim 2 including two pairs of spacer arms extending in opposite directions relative to the longitudinal axis of the arm carrying member.
  • spacerdamper for spacing a plurality of substantially parallel overhead electrical line conductors and damping out vibrations therein, said spacerdamper comprising a plurality of elongate and inextensible spacer arms, one for each conductor, a clamp means on each arm for clamping onto its respective line conductor, and a spacer arm carrying member comprising an inertial mass and from which the spacer arms

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  • Suspension Of Electric Lines Or Cables (AREA)
US106998A 1970-01-21 1971-01-18 Spacer-damper for electrical power lines Expired - Lifetime US3702371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB304070 1970-01-21

Publications (1)

Publication Number Publication Date
US3702371A true US3702371A (en) 1972-11-07

Family

ID=9750814

Family Applications (1)

Application Number Title Priority Date Filing Date
US106998A Expired - Lifetime US3702371A (en) 1970-01-21 1971-01-18 Spacer-damper for electrical power lines

Country Status (3)

Country Link
US (1) US3702371A (enrdf_load_stackoverflow)
FR (1) FR2077259B1 (enrdf_load_stackoverflow)
GB (1) GB1322903A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3105831A4 (en) * 2014-02-11 2017-09-20 Hubbell Incorporated Hinged clamp for spacer-damper
US10374407B2 (en) 2017-04-18 2019-08-06 Burndy, LLC Conductor spacer assembly with locking feature
US20220190579A1 (en) * 2019-08-26 2022-06-16 Ram Babarao Jogdand Saver clamp assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108764A (en) * 1990-09-07 1992-04-28 Nabisco Brands, Inc. Production of crackers with reduced or no added fat

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443019A (en) * 1968-06-20 1969-05-06 Lacol Ind Ltd Spacer damper
US3582983A (en) * 1969-02-22 1971-06-01 Salvi & Co Spa A Elastic spacer for bundles of conductors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1551947A (enrdf_load_stackoverflow) * 1967-09-18 1969-01-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443019A (en) * 1968-06-20 1969-05-06 Lacol Ind Ltd Spacer damper
US3582983A (en) * 1969-02-22 1971-06-01 Salvi & Co Spa A Elastic spacer for bundles of conductors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3105831A4 (en) * 2014-02-11 2017-09-20 Hubbell Incorporated Hinged clamp for spacer-damper
US10396538B2 (en) 2014-02-11 2019-08-27 Hubbell Incorporated Hinged clamp for spacer-damper
US10374407B2 (en) 2017-04-18 2019-08-06 Burndy, LLC Conductor spacer assembly with locking feature
US10873180B2 (en) 2017-04-18 2020-12-22 Burndy, LLC Fastener assembly
US11509124B2 (en) 2017-04-18 2022-11-22 Burndy, LLC Conductor spacer assembly with locking feature
US20220190579A1 (en) * 2019-08-26 2022-06-16 Ram Babarao Jogdand Saver clamp assembly

Also Published As

Publication number Publication date
FR2077259B1 (enrdf_load_stackoverflow) 1976-05-28
FR2077259A1 (enrdf_load_stackoverflow) 1971-10-22
GB1322903A (en) 1973-07-11

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