. The street railway review . *j^*h. KXTERIOK OF C.\R B.^ OF BARN. EXTBRIOR OF HEATING PITS. with great care and skill in the processes of magnetizing and age-ing. Further than this, the moving coil should be extremely lightand the whole system carefully shielded from the influence of ex-ternal fields, and yet so shielded that the moving coil will not berobbed of an appreciable number of lines of force, due to the pres-ence of the shielding iron. The greatest field for this type of in-strument is in the measurement of heavy currents; that is, for cur-rents of 1,000 ampe
. The street railway review . *j^*h. KXTERIOK OF C.\R B.^ OF BARN. EXTBRIOR OF HEATING PITS. with great care and skill in the processes of magnetizing and age-ing. Further than this, the moving coil should be extremely lightand the whole system carefully shielded from the influence of ex-ternal fields, and yet so shielded that the moving coil will not berobbed of an appreciable number of lines of force, due to the pres-ence of the shielding iron. The greatest field for this type of in-strument is in the measurement of heavy currents; that is, for cur-rents of 1,000 amperes and upwards, due to the fact that it canbe operated as a shunt instrument, requiring an extremely smalldrop of potential, full scale being obtained with a drop of from .03to .05 volt. This means a relatively high cfticiency, and, while theinstrument does not possess all of the advantages of a series am-meter, yet it is far easier to install, and, where a high degree of ac-curacy in current indications is not demanded, will be fo
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
