Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 198
vantage in some situations. These instruments, when built as ammeters, operate from shunts.The voltmeters are the same as ammeters, but are connected througha resistance across the line. Recording Type. Both ammeters and voltmeters are obtain-able in the curve-drawing types. In these instruments… … Fig. 46. Direct-Current Curve-Drawing AmmeterCourtesy of General Electric Company causes the pen to draw a curve which shows the variations of currentor voltage, as the case may be. Both time and current or voltagevalues are marked on the chart, so that it furnishes a permanentrecord. Curve-drawing…
Electrical engineering
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