Switchboards for Power, Light and Railway Service, Direct and Alternating Current, High and Low TensionDerry-Collard Company, 1905 - 192 стор. |
З цієї книги
Результати 1-5 із 38
Сторінка 11
... voltage of the generator is too high , a sufficient portion of the regulator resist- ance is thrown into the circuit of the generator field coils to bring it down to the required point , and if the voltage is too low the regulator ...
... voltage of the generator is too high , a sufficient portion of the regulator resist- ance is thrown into the circuit of the generator field coils to bring it down to the required point , and if the voltage is too low the regulator ...
Сторінка 14
... voltage is desired . In Feg . 6 the shunt coils lead off from the ends of the series coils , thus shunting these coils as well as the armature . This is called the long shunt . Sometimes the shunt coils as well as the series are ...
... voltage is desired . In Feg . 6 the shunt coils lead off from the ends of the series coils , thus shunting these coils as well as the armature . This is called the long shunt . Sometimes the shunt coils as well as the series are ...
Сторінка 21
... voltage is greatly facilitated , for the attendant can turn the regulator handle while watching the voltmeter , and thus see just when the proper adjust- ment is effected . In some cases it is desirable to arrange the external cir ...
... voltage is greatly facilitated , for the attendant can turn the regulator handle while watching the voltmeter , and thus see just when the proper adjust- ment is effected . In some cases it is desirable to arrange the external cir ...
Сторінка 28
... bar , and all the b brushes with the other bus . Shunt - wound genera- tors , however , are seldom used owing to the fact that they cannot maintain as uniform a voltage as the com- To equalize strength of current . A N m b 28.
... bar , and all the b brushes with the other bus . Shunt - wound genera- tors , however , are seldom used owing to the fact that they cannot maintain as uniform a voltage as the com- To equalize strength of current . A N m b 28.
Сторінка 31
... voltage due to the increased strength of the field . When the wires d d ' , b b ' and c are added , which are called the equalizing con- nection , the current generated by the two machines is equally divided between the two series coils ...
... voltage due to the increased strength of the field . When the wires d d ' , b b ' and c are added , which are called the equalizing con- nection , the current generated by the two machines is equally divided between the two series coils ...
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Загальні терміни та фрази
alternating current ammeter amperes angle armature arranged branch circuits break switches bus bars cables carbon circuit breaker circuit connections close the circuit conducting bars conductors connected with bus construction cross section current passes current strength Derry Collard Derry Collard Co desired devices diagram distributing circuits double throw Electric equalizing bus equalizing wires erator feed field coils field regulator four fuse G Figure ground detector hence increased independent Independent Circuits instruments insulation lamps lever light board lightning arrester located lower machines magnet main switch marble slabs means meter nected Non-arcing metals operated panel Phase Switchboard rent resistance rheostats safety fuse seen series coils set of busses short circuit shown in Fig shows shunt single phase sockets spark street mains switch blade synchronizing three phase three-wire system tion transformers two-pole upper vapor vertical voltage voltmeter volts wattmeter Westinghouse