Oil insulators on the Lauffen-Frankfort line were of two types: three cup and Johnson-Phillips one cup
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[Trade Journal] Publication: The Telegraphic Journal and Electrical Review London, England |
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· · Lines.
The high tensions of polyphased alternate currents compel us to have recourse to overhead lines specially insulated. The Lauffen-Frankfort experiments will afford us valuable information with regard to the quality of these lines, and we await the results of the experiments of the commission with [missing text] inpatience and curiosity, but it seems now to be uni-[missing text] acknowledged that the employment of large oil insulators with three cups involves a number of useless precautions. The insulators with a single cup, of the Johnson and Phillips type, seem all that is required, and have not up to the present given rise to any inconvenience. · ·
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