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 241
Fig. 78. Wiring Diagram for Insulation Test by Voltmeter Method the machine, is 1 division, the insulation is 1,485,000 ohms. Perma-nent marks indicating amounts of insulation may be put on thevoltmeter scale. When making measurements, the voltage shouldbe the same as that employed in preparing…
Electrical engineering
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