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When paralleling two AC generators the frequency of the incoming machine immediately prior to closing its breaker should be?
Wiki User
∙ 9y ago
The frequency must be the same and the phase must be the same as well. This can be indicated by having a lamp connected across the switch (for each phase if 3-phase).
Wiki User
∙ 9y ago
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What does Incoming and running generators are in same phase while paralleling two generators mean?
When two generators are to be run in parallel, one generator is first started and some load is given. Then second generator is brought in parallel with the running generator (subject few conditions, like voltage, frequency, phase angle). First generator which is running is known as running generator, the second generator which gets connected is known as incoming generator
What condition must be met to synchronize an alternator to an existing three-phase power line?
1.The effective voltages of the incoming generator must be exactly equal to that of the others or of the bus bars connecting them.2.The phase rotation or sequence of the running and incoming generators must be same.3. The frequency should be same.
What are the conditions in parallel operation of generator?
the operation of connecting an alternator with other alternator or with common bus-bars is known as synchronizing.Generally alternator used in power system where they are connected in parallel with other alternator.condition for parallel operation of an alternator1. The terminal voltage of incoming alternator must be same as the bus-bars voltage.2. The speed of incoming alternator must be such that its frequency f =pn/120 as the same frequency of the bus-bars.3. The voltage of incoming alternator and the bus-bars voltage are in same phage.
Circuit for single tuned amplifier?
A single tuned amplifier basically consists of a tuned circuit (which may consist of an IFT or a parallel tuned LC circuit) connected to the collector of an amplifier circuit (in Common Emitter configuration). The tuned circuit is designed to get a resonant frequency equal to the incoming frequency signal that arrives at the base. The Single Tuned Amplifier gives maximum amplification to that particular incoming frequency which matches the resonant frequency of the tuned circuit and attenuates all other frequencies. Thus it gives sharp selectivity with a high Q-factor.
What is intermediate frequency?
In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. [1] The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process calledheterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used in superheterodyne radio receivers, in which an incoming signal is shifted to an IF for amplification before final detection is done. The intermediate frequency stays the same for all signals, for example 455 kHz in an AM broadcast receiver.Conversion to an intermediate frequency is useful for several reasons. When several stages of filters are used, they can all be set to a fixed frequency, which makes them easier to build and to tune. Lower frequency transistors generally have higher gains so fewer stages are required. It's easier to make sharply selective filters at lower fixed frequencies.
What does Incoming and running generators are in same phase while paralleling two generators mean?
When two generators are to be run in parallel, one generator is first started and some load is given. Then second generator is brought in parallel with the running generator (subject few conditions, like voltage, frequency, phase angle). First generator which is running is known as running generator, the second generator which gets connected is known as incoming generator
How does the the frequency of a reflected wave compared to the frequency of a incoming wave?
It is double of the incoming wave.
What condition must be met to synchronize an alternator to an existing three-phase power line?
1.The effective voltages of the incoming generator must be exactly equal to that of the others or of the bus bars connecting them.2.The phase rotation or sequence of the running and incoming generators must be same.3. The frequency should be same.
What are the conditions in parallel operation of generator?
the operation of connecting an alternator with other alternator or with common bus-bars is known as synchronizing.Generally alternator used in power system where they are connected in parallel with other alternator.condition for parallel operation of an alternator1. The terminal voltage of incoming alternator must be same as the bus-bars voltage.2. The speed of incoming alternator must be such that its frequency f =pn/120 as the same frequency of the bus-bars.3. The voltage of incoming alternator and the bus-bars voltage are in same phage.
The formation of standing wave requires?
interference between the incoming and reflected waves of the same frequency
How does frequency mixing take place in radio receiver?
The incoming frequency is fed to a transformer ( or IC chip). Another frequency is fed to that same place. The sums and differences are output. Differences are rectified to recover the modulated info.
How can you convert sound pressure level to frequency?
Convert in coming signal to D.C. using a bridge rectifier. Use the voltage to run a voltage to frequency converter. You will have to scale the incoming signal to match the frequency range desired.
Why does the synchroscope need to be rotating clockwise if it is turning slowly counterclockwise won't that work the same?
because the incoming generator has be connected as a source and not a load to the grid. if the frequency of the incoming generator is lower than the grid frequency then ... it will behave as a motor drawing power from the grid and generator will trip in reverse power protection.
Why absorption happen in incomming light?
In absorption, the frequency of the incoming light wave is at or near the energy levels of the electrons in the matter.
How much of the incoming solar radiation that reaches the upper atmosphere is immediately reflected back to space?
Six percent is immediately reflected by the atmosphere.(Source: NASA.See the related question below.)
What is a local oscillation?
A local oscillator is used in a superheterodyne radio circuit for example.The incoming radio frequency is mixed with an internal local oscillator circuit to generate a new intermediate frequency (IF) .The local oscillator usually runs at a frequency of 470kHz and is generated by an inductor and capacitor(LC oscillator)
What is local oscilator?
A local oscillator is used in a superheterodyne radio circuit for example.The incoming radio frequency is mixed with an internal local oscillator circuit to generate a new intermediate frequency (IF) .The local oscillator usually runs at a frequency of 470kHz and is generated by an inductor and capacitor(LC oscillator)
