Even small deviations from the nominal frequency value would damage synchronous machines and other appliances.
2.
In practice the nominal frequency is raised or lowered by a specific percentage to maintain synchronization.
3.
Actual transmission is ?17 Hz around the nominal frequency for main line and ?00 Hz for metro.
4.
For audio equipment, this is nearly always the nominal frequency range of human hearing, 20 Hz to 20 kHz.
5.
Synchroscopes operate only over a limited range of frequencies, a few per cent above and below the system nominal frequency.
6.
The frequencies may not vary more than ?.8 % from their nominal frequency, or the switching center will ignore the signal.
7.
In practice, the exact frequency of the grid varies around the nominal frequency, reducing when the grid is heavily loaded, and speeding up when lightly loaded.
8.
Most electric systems use alternating current with a nominal frequency of 50 or 60 Hz ( hertz ) to deliver energy produced by electrical generators to the electricity consumers.
9.
Our article on Utility frequency notes that utilities try to keep quite close to the nominal frequency so that synchronous clocks only deviate a few seconds from actual time.
10.
The oscillator is assumed to have a nominal frequency of \ nu _ \ mathrm { n }, given in cycles per second ( SI unit : hertz ).
मोबाइल