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Power factor lead or lag?
By definition, the terms 'leading' and 'lagging' refer to what the load current is doing with respect to the supply voltage. So, for a 'lagging power factor', it is the current that is lagging.
An alternator could be severely damaged mechanically in attempting to sychronize it with the power line under what two conditions could this happen?
I'm not sure this qualifies as two different conditions, they are both similar.If the generator is more than a few degrees out of phase.If the generator phase angle is leading at the exact moment it closes to the bus.Explanation for #2: When manually syncing a generator, it is quite difficult to close the breaker at exactly 0 degrees, which is, of course, the desired outcome. If you close the breaker with the generator lagging a few degrees, the bus voltage (utility or other generator) will attempt to speed up the generator as if it were starting a motor.No harm done if the phase difference is just a few degrees. If, on the other hand, you close the breaker while the generator is leading, the bus voltage attempts to 'yank' the generator back to where it belongs, like a brake. If the phase difference is great enough, this can shear driveplates and even break crankshafts!The operator, then, shoots for zero to a couple degrees lagging when the breaker closes.
What happens if excitation fails in parallel oprating generator?
when excitation fails,Reactive power will be supplied by the system to which the generator is connected and generator will work as induction generator and its speed will rise a little. generator which was in over excitation mode will work in underexcitation.but there is under excitation limit which should not be reached so we should detect loss of excitation and trip generator
What is meant by lagging and leading circuit?
The terms, 'lagging' and 'leading', describe the relationship between a circuit's load current and supply voltage. They describe whether the load current waveform is leading or lagging the supply voltage -always the current, never the voltage. Inductive loads always cause the current to lag the supply voltage, whereas capacitive loads always cause the current to lead the supply voltage.
What is lead and lag angles?
Leading angle means that the current lead voltage by 90 degree,which implies a capacitve load. while,lagging angle mean when the current lag the voltage by 90 degree or when the voltage lead the current by 90 degree.which implies an inductive load.
Power factor lead or lag?
By definition, the terms 'leading' and 'lagging' refer to what the load current is doing with respect to the supply voltage. So, for a 'lagging power factor', it is the current that is lagging.
What l does not conduct very well?
lead Lagging.
How do you full field a ford tractor generator?
while the engine is running , put your + lead from your voltmeter on the armature lug( the big lead). take off your field wire from the generator (don't add power to the lead from the regulator or you will fry the regulator) add a power source to the field lug of the generator. the generator should start climbing, if you get 14.5 volts , the generator is good
Would you compare generator current to line voltage to determine if your leading or lagging?
It's always the current that determines 'leading' or 'lagging' -i.e. the angle by which the current leads or lags the voltage.
What is the full load current of 200kW 380V 3-phase generator with 0.8 lagging power factor?
304 Amperes
What L do you not conduct heat very well?
I think it could be lead
How reverse power will occur during synchronizing?
Reverse power flow into a generator can occur during synchronization if the generator is spinning too slowly, or the voltage phase angle is lagging relative to the power system. If the generator is spinning too slowly, power from the system is used by the generator to increase its' speed. If the phase angle is lagging, an initial spike of power will flow into the generator to force it into sync with the system. Typically generator's will match system frequency very closesly, and force the phase angle to leading slightly between the generator and the system. When synchronized, an extra bump of power will flow out while the generator is torqued into phase with the system. This will avoid tripping any reverse power devices.
When synchronus generator is supplying active and reactive power it is operating at leading or lagging power factor?
A synchronous generator is operating at lagging power factor (positive P & Q) when it is supplying P & Q to the system. P & Q are positive which means that they are flowing away from the bus where the generator is connected (overexcited case). On the other hand, it is operating at leading power factor when it is supplying P and absorbing Q. The sign of Q is negative which means that it is flowing towards the generator bus (underexcited case).
How can I pick the right electrical power generator?
Consumerreports.org offers reviews of products ranging from electronics to automobiles to home appliances. They should be able to lead you in the right direction in terms of a generator.
What is the Reactive power in a capacitive modeand inducitive mode?
Generators can be required to generate real and reactive power. When operating in a leading mode, the generator is generating real and leading reactive power (inductive power). This means the generator is "sucking in VARS", which will pull down the terminal voltage similar to an inductor. It can also be operated in a lagging mode, which means it is generating real and lagging reactive power (capacitive power). The generator, then, is "pushing out VARS" like a capacitor, which will cause the terminal voltage to increase. Generators can only create so many leading and lagging VARs; in general lagging VARs are limited by the automatic voltage regulator output capabilities; leading vars are limitted by how much heat the stator can dissipate.
Should I worry that one or two of the 4 puppies that were just born don't always get in there and get a teat to suck on?
yes! you should lead them to the teat & introduce them to it, even if it is between normal feeds, or at the start of a feed. Get the ones that are lagging behind to feed from the more productive teats on the belly (lower abdomen) yes! you should lead them to the teat & introduce them to it, even if it is between normal feeds, or at the start of a feed. Get the ones that are lagging behind to feed from the more productive teats on the belly (lower abdomen)
Which strand (leading or lagging) will have the okazaki fragments?
The lagging strand.
