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 91
achine orline, but to operate only when the power is being delivered in thewrong direction. Speed-limit devices are used on both engines and rotary con-verters to prevent racing in the one case and running away in thesecond. Such devices act on the steam supply of engines and onthe direct-current… … SUBSTATIONS Substations are for the purpose of transforming the high poten-tials down to such potentials as can be used on motors or lamps,and in many cases to convert alternating current into direct current. Step-down transformers do not differ inany respect from step-up transformers.Either…
Electrical engineering
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