Since both the primary and secondary windings are made of copper, the windings contribute to the ohmic losses and leakage flux which is represented by resistance and leakage reactance in the primary and secondary circuit.
22.
Coupling transformers were difficult to adjust, because the three adjustments, the tuning of the primary circuit, the tuning of the secondary circuit, and the coupling of the coils, were all interactive, and changing one affected the others.
23.
However voltage spikes can also have more mundane causes such as a fault in a transformer or higher-voltage ( primary circuit ) power wires falling onto lower-voltage ( secondary circuit ) power wires as a result of accident or storm damage.
24.
He also discovered that induced currents are established in a second closed circuit when the current strength is varied in the first wire, and that the direction of the current in the secondary circuit is opposite to that in the first circuit.
25.
Also that a current is induced in a secondary circuit when another circuit carrying a current is moved to and from the first circuit, and that the approach or withdrawal of a magnet to or from a closed circuit induces momentary currents in the latter.
26.
Why is it so that when primary transformer is connected to A . C . the current in it is very small if the secondary circuit is open but increases when the secondary circuit is closed ? Preceding talk ) 18 : 30, 11 May 2011 ( UTC)
27.
Why is it so that when primary transformer is connected to A . C . the current in it is very small if the secondary circuit is open but increases when the secondary circuit is closed ? Preceding talk ) 18 : 30, 11 May 2011 ( UTC)
28.
:: : : : The original questioner seemed to be puzzled by the lack of a physical connection between the primary and secondary circuits in a transformer, and my point was that you do not need a physical connection, any more than a radio receiver needs to be connected to the transmitter.
29.
So in answer to the OP's question, the primary liquid sodium cooling circuits is indeed a lot hotter but in terms of bother temperature and heat transfer [ calories ] it does indeed do a splendid job of conducting heat energy away to the secondary circuits, where the stream is produced for direct use by the turbines.
30.
After picking up heat as it passes through the reactor core, the primary coolant transfers heat in a steam generator to water in a lower pressure secondary circuit, evaporating the secondary coolant to saturated steam in most designs 6.2 MPa ( 60 atm, 900 psia ), 275 �C ( 530 �F ) for use in the steam turbine.
