Switchboards for Power, Light and Railway Service, Direct and Alternating Current, High and Low TensionDerry-Collard Company, 1906 - 192 стор. |
З цієї книги
Результати 1-5 із 24
Сторінка 20
... hence , it must be acted upon by the total pressure , and to be so acted upon , it must bridge the circuit from one side to the other , that is , from wire N to wire P. The amount of current that Leave room behind board . passes through ...
... hence , it must be acted upon by the total pressure , and to be so acted upon , it must bridge the circuit from one side to the other , that is , from wire N to wire P. The amount of current that Leave room behind board . passes through ...
Сторінка 25
... , and will be nearly zero if the system is properly bal- anced . When the current is supplied by the generator G , the center wire will carry as much current as the Switches and circuit breaker . other two combined ; hence 25.
... , and will be nearly zero if the system is properly bal- anced . When the current is supplied by the generator G , the center wire will carry as much current as the Switches and circuit breaker . other two combined ; hence 25.
Сторінка 26
William Baxter. Switches and circuit breaker . other two combined ; hence the center wire must be t made of double the cross section . Thus it will be seen e I 1 g 2 h h cb a b CO G do The Derry Collard Co. Am Figure 14 Current passes ...
William Baxter. Switches and circuit breaker . other two combined ; hence the center wire must be t made of double the cross section . Thus it will be seen e I 1 g 2 h h cb a b CO G do The Derry Collard Co. Am Figure 14 Current passes ...
Сторінка 32
... hence , if A were grounded , both generators would become useless . For a complete separation of the two machines we must have another switch in the wire running from line wire P to armature A. Arrangement of Instruments and Switches ...
... hence , if A were grounded , both generators would become useless . For a complete separation of the two machines we must have another switch in the wire running from line wire P to armature A. Arrangement of Instruments and Switches ...
Сторінка 42
... Hence , if economy dictates the reduction in the number of instruments , it is better to provide one voltmeter for each generator and only one ammeter for the two . The best arrangement of all , is to provide a differential voltmeter ...
... Hence , if economy dictates the reduction in the number of instruments , it is better to provide one voltmeter for each generator and only one ammeter for the two . The best arrangement of all , is to provide a differential voltmeter ...
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alternating current ammeter amperes angle armature arranged branch circuits break switches bus bars cables 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 Figure four fuse 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 switch S2 synchronizing three phase three-wire system tion transformers upper vapor vertical voltage voltmeter volts wattmeter Westinghouse