A wiring diagram showing how three of these variable autotransformers may be connected together for each phase to provide ... Automatic Voltag* Regulator A number of automatic voltage regulating devices suitable for maintaining the lamp voltage constant without attention are available. ... a maximum variation of =ti of 1 % for lamp loads up to about 5 kva by means of an automatic voltage regulator.
|Title||:||How to make color photographs|
|Author||:||American Photographic Pub. Co|