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Why only 3 phase voltage Why is there no 4 phase or 5 phase or 6 phase Is there any specific reason advantage of 3 Phase Voltage?
Wiki User
∙ 15y ago
winging is always constructed in 360 degrees angle. 3 phase winding is built after 120 degree angle. If a 2 phase phase wingind is designed, it is 2 , 180 degree angles winding, which is exectly same as 2 coils in series. Similarly, 4 phase has same effects, a pair of 2phase winding.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoIt comes down to economics. Four- or five-phase systems would not offer any advantages over three-phase to justify the additional costs. It's also worth mentioning that the additional windings that would be required in a practical generator would act to reduce its voltage/power ratings.
Wiki User
∙ 10y agoBecause three-phase is the simplest way to achieve the advantages of polyphase power transmission. Increasing the number of phases brings no additional advantages and introduces unnecessary complications into equipment.
Wiki User
∙ 9y agoBecause going to more phases would provide no extra advantages in terms of transmission efficiency, while it would increase the complexity of many items of equipment like Transformers and circuit-breakers. So it aint going to happen.
Wiki User
∙ 11y agoBecause 3 phase system is the most efficient and low cost in power generation, distribution system and also in designing and making generators, transformers and motors etc.
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Why is phase voltage not twice line voltage?
Line to line voltage is not the same as line to neutral voltage because line voltages are 120 degrees apart. They are related by: Line to neutral voltage * tan (120 degrees) = Line to neutral voltage * 1.73.Additional CommentFor delta-connected systems, the line voltage is the same as the phase voltage.For wye-connected systems, the line voltage is larger than the phase voltage by a factor of 1.732. The reason for this is as follows:Because any two phase voltages are displaced from each other by 120o, they must be added vectorially, not algebraically, to find the line voltage. As the above answer points out, this means that the relationship between the two is the square-root of 3, or 1.732.
Why do you flip the switch in the circuit breaker?
You flip the switch to turn power off to the selected circuit, always verify that there is no voltage with a multimeter I >>STRONGLY<< discourage using only a voltage finder stick (widow maker) to check for no voltage as is has the widow maker nickname for a reason!
What is term used when an Alternating current acts like a direct current?
Perhaps you are asking how the voltage of alternating current is measured, to be equivalent to the voltage of a direct current system. Alternating current and direct current have distinct properties. With direct current, voltage is at a constant polarity, and a direct current voltage source will maintain a uniform, constant voltage level. Alternating current reverses polarity at a given frequency and therefore it's voltage continuously varies from a positive peak voltage level, through zero, to a negative peak voltage level, repeating this cycle continuously. For this reason, voltage of an alternating current system, is measured in root-mean-square (rms), which is a voltage, which when multiplied by the current in amperes, calculates power which is equivalent to that of direct current of the same voltage and current values. With a typical sinusoidal waveform, the peak voltage of alternating current is divided by the square root of 2 to determine the rms voltage. The 120 volts output in the wall outlet in our home is actually about 170 peak volts.
Electricians use the term low potential to refer to?
The term low potential or low voltage is defined by the electrical code book. The break over from low voltage to high voltage is 750 volts. The reason for this division is the procedures are completely different the way the wiring id done.
Can you use 240 volts to 220 volts?
Each voltage has a range and devices rated in that range will all work . The 110 to 120 volts is one range of voltages. The 220 to 240 is another range of voltages. The reason there is a range of voltages is to help the utility company out. They are mandated to keep the voltages within a + or - 5% range of a set voltage. Because there are loads coming on line and loads dropping off line the voltage fluctuates. Using a base voltage of 115 and 230 volts means that the voltage can rise by 115 +5% = 121 volts and drop by 115 - 5% = 109 volts. In the 230 volt range the voltage can rise by 230 + 5% = 241 and drop by 230 - 5% = 219 volts. As you see they are still in the usable voltage ranges.
Why should the secondary of a voltage transformer not be short circuited?
A voltage transformer takes a primary voltage and steps it down to a smaller secondary voltage. This type of transformer will attempt to keep the secondary voltage at a specific ratio of the primary voltage. If you short it, massive current flow in the secondary is required to do this. For a similar reason a CT should never be open circuited - because it attempts to push a specific ratio of primary current through the secondary. If you open circuit the secondary, it takes a massive voltage on the secondary to accomplish this.
What is the reason for bulb becoming dim when connected in series?
the voltage across it is reduced, the voltage is shared with other bulbs
What is the reason for ferranti effect?
Ferranti Effect causes the receiving end voltage to be more than the sending end voltage. It occurs mainly in long transmission lines when they are lightly loaded. In this condition, the inductance of the lines becomes more resulting in increased receiving end voltage.
Powertrain Control Module plus BB Voltage Low?
Low plus bb voltage to the Power Train Module means that for some reason the voltage actually is too low. Check the battery an alternator for the proper voltage output.
How the Neutral displacement occures?
In a three phase connected system, if the loads are not balanced or if one voltage is disconnected due to any reason there will be neutral displacement to a new voltage level (from normal zero voltage). This can increase/decrease voltage in other phases
What is the reason for putting a voltage rating on resistors?
Due to the physical construction and size of the resistor, at a certain voltage, the insulation will break down and the applied voltage will arc over. This is generally bad. Operating the resistor within its voltage rating will prevent this failure mode.
Ac voltage applied across a load resistance produce alternating current?
The reason an AC voltage applied across a load resistance produces alternating current is because when you have AC voltage you have to have AC current. If DC voltage is applied, DC current is produced.
The primary reason a light bulb emits light is due to?
voltage
What are the advantages and disadvantages of such high voltage?
voltage is termed as electrical pressure. when high voltage is applied more is the movement of electrons. hence losses will be less. this is one of the major reason for which high voltage transmission is chosen.secondly due to high voltage the current will be less so as the conductor size
Why instruments are connected on low voltage side of the transformer while performing no load test?
since we need to get desired or rated voltage, so if it is connected in high voltage side of the transformer, voltage supply will be more, and hence the current will be more than the required amount. this is the reason why the instruments re connected at the low voltage of the transformer while performing no load test.
Why you are generating ac not dc?
question is wrong....ac is generated in alternator <<>> The most likely reason is that there is no field voltage being generated. This is controlled by the voltage regulator. Check to see if you are getting a DC field voltage. On the voltage regulator there are terminals to different pieces of equipment on the machine. Look for the terminals that are designated F1 and F2. These should have a DC voltage on them. Also look for a potentiometer that controls the field voltage. Turn it one way and the voltage will go down and turned the other way the voltage will go up. Make sure that this potentiometer is in the correct position to allow voltage to the field coils.
Why is phase voltage not twice line voltage?
Line to line voltage is not the same as line to neutral voltage because line voltages are 120 degrees apart. They are related by: Line to neutral voltage * tan (120 degrees) = Line to neutral voltage * 1.73.Additional CommentFor delta-connected systems, the line voltage is the same as the phase voltage.For wye-connected systems, the line voltage is larger than the phase voltage by a factor of 1.732. The reason for this is as follows:Because any two phase voltages are displaced from each other by 120o, they must be added vectorially, not algebraically, to find the line voltage. As the above answer points out, this means that the relationship between the two is the square-root of 3, or 1.732.
