A polymer insulator for high-voltage transmission lines

Vose, F. C.; Nichols, F. S.

doi:10.1109/ee.1963.6539714

Cited by 6 publications

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“…Hence the only figure of merit that can be taken is ,the flashover voltage or critica! stress 1 The cast insulator was coated with an epoxy acrylic system. 2 The cast insulator was coated with a polyurethane system.…”

Section: Test Methodsmentioning

confidence: 99%

Results of outdoor ageing of cast epoxide systems under electrical stress

Billings

Humphreys²

1967

1967 Seventh Electrical Insulation Conference

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APPENDIX 7Cost Details Axial Lead Mylar GP Capacitor--'t!OW liquid cast a. Material Insert -15 mm. long -7 mm. diameter Mould-20 mm. long Cavity-9 mm. diameter Volume of Epoxy = L, (r,) -L2 (r:} = 20 (4.5 2 ) -15 (3.5 2 ) = 695 m" = .695 cc Weight of Epoxy = .695 X 1.83 (sp gr) = 1.27 grams Add scrap loss for sprue, runners and gates for average 50 cavity mould 1.27 plus 30% ~measured) = 1.65 gr Costof Epoxy 1.65 grams $ 5 lb $0 0047 . 450 X 1.2 per = . per capacitor b. Labour Estimated usage of this type and size= 8000/week = 400,000/year approx.As there are a total of six sizes, it is important to get maximum machine utilization (and minimum cost per unit) by moulding a large number of units per cycle.Use 100 cavity mould, with a 2.5 minute moulding cycle (2 min transfer and cure plus allowance for removal and insertion of loading jib) . 60 ~ 100 X $450 per hour = .00275 per unit. $2 .50 per ho ur plus 80% overhead. TOT AL COST (without depreciation) of encapsulation ... $0.007 /capacitor Depreciation (suggested method) Charge transfer press cost over 5 years, and over total number of capacitors to be moulded in the 5 years.Charge mould over 3 years, over number of capacitors of that size to be moulded.

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Section: Test Methodsmentioning

confidence: 99%

Results of outdoor ageing of cast epoxide systems under electrical stress

Billings

Humphreys²

1967

1967 Seventh Electrical Insulation Conference

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“…Polymer Insulators, which are distinguished by their compact size, lightweight, high mechanical power, ease of installation, and low maintenance, have emerged as a new generation of high voltage transmission line insulators. The protective ribbed mold on polymer insulators is made of silicon organic rubber, which makes it different from other insulators [139].…”

Section: High Voltage Transmission Line Insulatorsmentioning

confidence: 99%

Application and Suitability of Polymeric Materials as Insulators in Electrical Equipment

et al. 2021

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In this paper, the applications of thermoplastic, thermoset polymers, and a brief description of the functions of each subsystem are reviewed. The synthetic route and characteristics of polymeric materials are presented. The mechanical properties of polymers such as impact behavior, tensile test, bending test, and thermal properties like mold stress-relief distortion, generic thermal indices, relative thermal capability, and relative thermal index are mentioned. Furthermore, this paper covers the electrical behavior of polymers, mainly their dielectric strength. Different techniques for evaluating polymers’ suitability applied for electrical insulation are covered, such as partial discharge and high current arc resistance to ignition. The polymeric materials and processes used for manufacturing cables at different voltage ranges are described, and their applications to high voltage DC systems (HVDC) are discussed. The evolution and limitations of polymeric materials for electrical application and their advantages and future trends are mentioned. However, to reduce the high cost of filler networks and improve their technical properties, new techniques need to be developed. To overcome limitations associated with the accuracy of the techniques used for quantifying residual stresses in polymers, new techniques such as indentation are used with higher force at the stressed location.

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Power Transmission

Stewart

Oppel

2003

Digital Encyclopedia of Applied Physics

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A polymer insulator for high-voltage transmission lines

Cited by 6 publications

References 0 publications

Results of outdoor ageing of cast epoxide systems under electrical stress

Results of outdoor ageing of cast epoxide systems under electrical stress

Application and Suitability of Polymeric Materials as Insulators in Electrical Equipment

Power Transmission

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