0
A protective relay determines frequency of an AC signal of an electric power system. The protective relay includes a circuit measuring the AC signal period between zero crossings to provide a measured period value. A microprocessor includes a random access memory having a five-element array, which collects five consecutive values of the measured period values. A microprocessor routine chooses a median from the measured period values and generally determines the frequency based upon the median. The median is ignored and the previously determined line cycle period is adjusted to determine the new line cycle period if: an absolute value of a difference between a last value of the measured period values and a previously determined line cycle period is not less than a predetermined value; and the last value of the measured period values is within the limits of the array. <Prof Dae_Pwa>
What else can I help you with?
-if the period of one cycle of an AC signal is 20mS what is its frequency?
50 cycles
Why the linear combination of a low frequency intelligence signal and a high frequency carrier signal is not effective as a radio transmission?
to shift the frequency of information signal ,at the frequency domain to a higher frequency ...so the information can be transmitted to the receiver.
What is the Difference between frequency converter and frequency inverter?
frequency is genrally cycle per second, and frequencies may be of a dc nature or ac , devices which convert dc frequency in to an ac frequency are frequency converters and devieces which convert ac frequency in to dc frequency are frequency inverters. because in terms of power electronics, devices which convert ac to dc are called converters, and devices which convert dc in to ac are called "inverters" 'mehboob hunzai" I'm a engineers in this devices, the frequency inverter is convert AC to AC but with variable frequency output, means the frequency & voltage are adjustable; The frequency converter can convert DC to AC, like 24VDC to 220VAC and also the frequency is adjustable. One most important thing is the out power of frequency inverter just can be used for controlling AC motor, while frequency converter can be treated as normal power supply as our daily using power grid. "zhuge fs"
What is IP3 and IM3?
IM3 degrades the sensitivity of the desired signal as an in band spurious frequency component. IP3 determines the severity of the degradation as a measurement through the linearity of the system.
What does frequency of a signal measure?
repetition rate of signal
Which element of an electric signal determines its capacity to carry information?
Frequency
What determines the output frequency of an ac generator?
It's speed and the number of poles.
What determines the amount of deviation of an fm signal?
FM or frequency modulation is a means to vary the frequency withing a set basic frequency and transmit it. FM radio demodulate the frequency extracting the signal that made the frequency shift at the source.
What determines the speed of an AC motor?
The higher the frequency the higher the RPM the motor will turn
-if the period of one cycle of an AC signal is 20mS what is its frequency?
50 cycles
What is weston frequency meter?
Weston frequency meter is a type of electromechanical instrument used for measuring the frequency of an alternating current (AC) power system. It typically consists of a moving-coil meter mechanism that reacts to the frequency of the AC signal to provide a reading on its scale. Weston frequency meters are used in various applications to monitor and analyze the frequency of electrical systems.
What is a cycloconverter?
A cycloconverter or a cycloinverter converts an AC waveform, such as the mains supply, to another AC waveform of a lower frequency, synthesizing the output waveform from segments of the AC supply without an intermediate direct-current link.
What is the significance of the frequency f0 in the context of audio signal processing?
The frequency f0 in audio signal processing is important because it represents the fundamental frequency of a sound wave. This fundamental frequency determines the pitch of the sound, which is crucial for tasks like music analysis, speech recognition, and sound synthesis.
What does each signal vibration of an object produce?
Each signal vibration of an object produces a specific sound frequency. The frequency of the vibration determines the pitch or note of the sound. The intensity of the vibration affects the volume or amplitude of the sound produced.
What is relation between frequency of an AC supply and vibrating segment of the string in longitudinal mode of vibration?
The frequency of an AC supply determines the frequency of the longitudinal mode of vibration in a string. When the frequency of the AC supply matches the natural frequency of the string, resonance occurs, leading to maximum vibration amplitude and energy transfer to the string. This phenomenon is utilized in various applications such as musical instruments and communication devices.
What is the significance of the delta f over f parameter in frequency modulation?
The delta f over f parameter in frequency modulation is significant because it represents the frequency deviation relative to the carrier frequency. It determines the amount by which the frequency of the modulated signal varies from the original carrier frequency. This parameter is crucial in determining the bandwidth and quality of the modulated signal in frequency modulation systems.
What is the relation between amplitude and freq if a transmitter having frequency 500mhz what is the amplitude range if have any formula please tell me about that?
Actually the amplitude depends on your modulator by which you generated your signal you can pick any amplitude you want but here is the formula for frequency modulated signal: Ac here decide the amplitude of the signal and you can see that it is not related to the frequency component of your signal.
