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What can you put on your house meter to stop a generator from energizing a grid line?
Wiki User
∙ 11y ago
A double pole double throw transfer switch is what you are referring to. It does not go on the house meter. The placement of the transfer switch is between the first over current device and the distribution panel.
Wiki User
∙ 11y ago
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What is the working principle of Doubly Fed Induction Generator?
The principle of the DFIG is that rotor windings are connected to the grid via slip rings and back-to-back voltage source converter that controls both the rotor and the grid currents. Thus rotor frequency can freely differ from the grid frequency (50 or 60 Hz). By using the converter to control the rotor currents, it is possible to adjust the active and reactive power fed to the grid from the stator independently of the generator's turning speed.
What are precautions to be taken at the time of back charging of generator transformer?
Nothing. If your system can run your house while the main breaker to the power grid is off, then back charging will occur as a byproduct while the main breaker to the power grid is on and you are using less power than you are generating. During times of a power outage, you'll want to cut the main breaker to the power grid, so that your system doesn't try to power the entire neighbor hood.
What is the difference between generator over excitation versus under excitation when attached to the grid?
Over Excitation is a condition when the Excitation System is providing too much field current and as a result, the rotor of the generator will over heat. The Excitation System is equipped with an Over Excitation Limiter. This limiter acts to reduce the Excitation Current if this condition exists Underexcitation is a condition when the generator is not getting enough Excitation Current. If the generator does not get enough Excitation Current, it can be un-synchronized with the grid. We call this slipping a pole. If this occurs, the generator can be severely damaged. Kelly Thompson Engineering Lead Siemens Energy Alpharetta GA
What is reverse power of generator?
It is wise to start thinking of power in DC circuit. If a load is connected to a power source in a DC circuit, the corresponding VOLT CURRENT plot both will be in the positive quadrant. Of course, polarity must be correct. Now if the CURRENT (in the same polarity arrangement) happens to be in the negative quadrant, the power is said to be reversed. The same can be thought in an AC circuit. Taking a half wave cycle of both VOLT and CURRENT, one can apply the same understanding as in the DC circuit. If the AC circuit is capacitive or inductive, VOLT and CURRENT waves will be shifted according to the value of the capacitive or inductive load, and here one has to be aware. Adel Aljassar adel@al-jassar.net
How do you measure Phase difference?
The easiest way to measure phase difference is with an oscilloscope. Connect one channel to one signal, and connect the other channel to the other signal. Display both channels and trigger off of one. Measure the time difference - best accuracy is at the zero crossing point - and represent that as a percentage of the full period of one signal, normalized to 360 degrees. If you are building circuitry to do this, there are many options but, basically, you are just repeating in circuitry what you do with the oscilloscope. There are some tricks... Assuming you are building a manual synchronizer for a generator, you can place a light bulb between the two phases, grid and generator. The light bulb will be at full brilliancy when the phases are 180 degrees out, and it will be dark when the phases are in sync. Still assuming the synchronization problem, you can connect the two phases to a special meter with two windings - the meter turns 360 degrees - and indicates phase angle - usually 12:00 is in sync - and most generators are designed to take the load when the generator is slightly faster than the grid and it is in the hot zone for being considered in sync.
What conditions must be done before a generator can be connected to a 3 phase system?
Assuming the generator is in good condition and designed to be connected to a power grid. A generator can be connected by ensuring the generator is at very nearly the same speed as the grid (typically very slightly faster) and is generating a similar voltage. When the phases of the generator and grid align, the circuit breakers can be closed and the generator will become locked to the grid. If the generator is connected to the grid without being in phase, the difference in phase will allow significant current to flow and in some situations can actually be worse than a direct short circuit. As a result of this power companies use sophisticated equipment to ensure that generators can be safely connected to the grid without damage. Household, camping and most industrial generators are not designed to be synchronised with the grid and should not be connected to a grid system.
What conditions must be done before a generator can be connected to a 3-phase system?
Assuming the generator is in good condition and designed to be connected to a power grid. A generator can be connected by ensuring the generator is at very nearly the same speed as the grid (typically very slightly faster) and is generating a similar voltage. When the phases of the generator and grid align, the circuit breakers can be closed and the generator will become locked to the grid. If the generator is connected to the grid without being in phase, the difference in phase will allow significant current to flow and in some situations can actually be worse than a direct short circuit. As a result of this power companies use sophisticated equipment to ensure that generators can be safely connected to the grid without damage. Household, camping and most industrial generators are not designed to be synchronised with the grid and should not be connected to a grid system.
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.
If you plug a generator into your house what will happen?
You have it the wrong way around, you plug the load into your generator. Never plug a generator into a house unless you have the proper disconnect installed. To do so will put you and your house in danger. Plus you are a danger to anyone working on the main line supplying power to your house. Things that could happen. 1 You could feed power to the main line which can kill or injure anyone working on the main line. 2 Without the proper control switch. You could be subject to large fines. 3 If the power company finds out. They could pull your meter. Taking your house off the grid. 4 You will be liable for any damage you cause. Also your insurance could be canceled. 5 If power comes back and back feeds your genset. It will turn into a smoking pile of junk. 6 If you need a generator at your house. Have it installed the proper way by a company that does installs.
Can you attach a generator to your sub panel and back feed your house main panel I have a 125 amp breaker in the main that feeds the sub through 2 aught wire?
Yes but it has to be a synchronous generator like the ones used on the grid, and it has to be run up and phased before being connected. That is because all the generators on a grid run at the same speed and phase (the phase of an individual generator alters a little depending on the power flow from it).
Why would an electric meter on your house turn backwards?
Because the utility customer is providing energy to the grid. Usually because of net metering of renewable systems.
If you have an electric generator what do you have to do to supply electricity to the grid?
It will depend very much on your local supply company. You will be supplying to the local system at your house voltage (unless you are going in for a fully commercial supply) so you are not going straight to the grid in any case. The local company would certainly want to know what you are doing, for safety reasons. Suppose they had isolated your house supply for work, and you connected your generator at that time, you would make the house supply live again and endanger workers on the lines, so you have to be controlled.
How does a Chinese diesel generator work?
A chinese diesel generator is the combination of a diesel engine with an electrical generator (often called an alternator) to generate electric energy. Diesel generating sets are used in places without connection to the power grid or as emergency power-supply if the grid fails. A Chinese generator is pretty much the same as a regular generator. Besides the fact that it is made in China there isn't a big difference in how they function.
Within how many meters does a 10 digit grid get you to?
one meter
Where does a hotel get its electricity from?
The power grid, some may have a back-up generator for power outages.
How difficult is it to install a generator in your house and make it run off your natural gas in a blackout?
You have to replace the gaskets and some other parts to make a generator run on natural gas. It's not all that complicated, but you might need some help. An electrician should probably hook up your generator so that it cuts on and off with the availability of off the grid power.
Can you sell excess electric from your home solar system?
If your country has a scheme for feeding your excess electricity into the grid, then, yes you can. However the connection to the grid needs to be made professionally and if the mains (grid) fails your home solar system must stop generating too (to prevent electrocuting power workers fixing faults). You would also need a Feed In Tariff (FIT) contract with a generator in order to be payed (and an generation/export meter).
