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 351
the centerof the core of 100:5, or 200:1. If the cable is passed through the open-ing twice, the ratio is 500:5, or 100:1, etc. Both types are rated at 40watts, and may be used on circuits the voltage of which does not exceed2,500 volts. The instrument, such as an alternating-current ammeter, tobe… … Fig. 277. Portable Current Trans-former without Regular PrimaryWindings 312 ALTERNATING-CURRENT MACHINERY 299 in the line and through the primary will be 200 amperes. In Fig.217 the coil A, in series with the secondary coil S*, may representthe switchboard ammeter. The question may arise as to why…
Electrical engineering
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