Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 118
megohms ( 1megohm = 1 million ohms ), connected up in series with afine galvanometer shunted by the ^ shunt. If the galvano-meter under these circumstances gives a deflection of 60scale divisions, then 60 x 100x2=12,000 would be itsconstant, that is to say, if not shunted, it would indicate… … 9 sistance, one endbeing grounded.If then the gal-vanometer, notshunted, shows4 0 scale divi-sions, this will in- FlG* 33*dicate the insulation resistance to be = ^ X 12,000 = 300megohms, because insulation resistance is the reverse ofinsulation conductance. (See § 53. ) A length of 3 miles ofthe…
Electrical engineering
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