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IT depends on the voltage that is at the powerlines. Ibelieve the common residential powerline voltage is 2160v and your house is 120/240v
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Why LV side is shorted in short circuit test?
Transformer short circuit tests are used to determine the impedances (positive and zero sequence) of the transformer. A simple explanation: to do this one winding is shorted, and voltage is applied to another winding to circulate the normal full load current of the transformer. The impedance of the transformer is the applied voltage divided by the induced current. If one winding was not shorted, the voltage divided by induced current would not give the impedance of the transformer - the induced current would be much lower, giving a much higher impedance measurement that would be essentially meaningless.
To reduce power losses in transmission lines the voltage is made?
Much higher.
What is function of capacitor voltage transformer?
The function of a CVT is to provide a secondary voltage to equipment that is a direct ratio of a much higher primary voltage. They can also be used to couple communication signals onto transmission lines.
What is the max dc voltagee to be obtained from a transformer with an 18 v rms secondary using a bridge rectifier ckt with a filter?
About 24 volts. Take 18 and divide by 0.707, then subtract about 1.4 to compensate for the two diodes that will always be in series with the load. Of course, any load will cause ripple, so the 24 volts is with nearly no load.
Why are step-down transformers used?
A step-down transformer is a reverse-wired step-up transformer. You can take a 110/220 transformer and feed 110 to step up to 220 or feed 220 to step down to 110. step down transformer is a device which reduces voltage .
How much output voltage is there if input voltage from a transformer is 32v?
It depends on the turns ratio of the transformer.
Why do you not use potential transformer?
Your question is rather oddly phrased as, obviously, there are countless ways in which you wouldn't use a potential transformer! It's much easier to explain why you would us a potential transformer. A potential transformer (known outside North America as a 'voltage transformer') is classified as an instrument transformer, which means that its output is used to drive instruments, such as voltmeters and (the voltage coils of) wattmeters, etc., or to provide inputs to protective relays. It's function is twofold: (1) to reduce the high voltage of the circuit to which its primary winding is connected to a lower voltage which can be 'read' by a voltmeter, etc., and (2) to electrically-isolate its secondary circuit from the primary circuit for the purpose of safety.
How can you identify which one is step up or step down transformer?
A transformer has two windings, termed the 'primary winding' and the 'secondary winding'. The primary winding is the winding connected to the supply, while the secondary winding is connected to the load. The secondary voltage of a 'step up' transformer is higher than the primary voltage; the secondary voltage of a 'step down' transformer is lower than the primary voltage. The simplest way to determine whether a transformer is a step up or step down, is to measure the primary and secondary voltages. If you are simply looking at a transformer, then the transformer's insulated bushings will give you a clue -the higher voltage bushings are much bigger than the lower voltage bushings. If you have access to the inside of the transformer, then the higher voltage windings are thinner and have a greater number of turns than the lower-voltage winding.
What happens when a transformer is operated at no load with high voltage?
It depends on how much voltage you have applied. If you apply rated voltage nothing happens only core losses will be there on the transformer nothing will happen apart from that. If you go on increase the voltage core losses will increase and transformer will get heated up. After attaining the breakdown voltage of insulation, insulation in the primary and secondary will fail and the coils will get short circuited then the coils will burn.
How much voltage comes from the pole to the house?
240 volts from the secondary side of the transformer to your house
How much is the secondry voltage vs with a primary voltage is vp equals 120v?
As far as a transformer is concerned, the secondary voltage Vs value cannot be determined by the primary voltage Vp alone. For the simplest of calculations the transformer primary-secondary turn ratio must be known. For an ideal transformer ( and practicaly ideal transformers don't exist as there will be various losses in the transformer cores and windings), the simple equation relating secondary voltage to primary voltage would be : Vs/Vp=Ns/Np=Ip/Is where Ns is the number of winding turns in the secondary of the transformer, and Np the primary. Ip is the primary current and Is the secondary.
Why is AC widely used in transmition and DC is not?
AC is alternating current therefore for the same wire twice as much power is available also a transformer can be used to reduce the hi voltage to lower voltage easier. for interstate transmission DC would be prohibitive in size cost and power losses
I bought ps2 in the US can i plug it to a 220volts in the philippines?
No the US voltage is much lower and it will need a transformer
How you can choose the capacitor range for 24 volt output rectifier?
the high quality way is to rate the capacitor for: 2 times the DC voltage. or 2 times the peak voltage of the transformer. Consumer Industry does not care about prpoduct life span and accepts much less conservative "bare minimum" ratings to reduce cost: 1.5 times the DC voltage. or 10% higher than the peak voltage of the transformer A good 24V supply has a 35V capacitor. Of course the cheaply made product will fail sometime with such narrow margin.
Why LV side is shorted in short circuit test?
Transformer short circuit tests are used to determine the impedances (positive and zero sequence) of the transformer. A simple explanation: to do this one winding is shorted, and voltage is applied to another winding to circulate the normal full load current of the transformer. The impedance of the transformer is the applied voltage divided by the induced current. If one winding was not shorted, the voltage divided by induced current would not give the impedance of the transformer - the induced current would be much lower, giving a much higher impedance measurement that would be essentially meaningless.
To reduce power losses in transmission lines the voltage is made?
Much higher.
How is an ac voltage from an overhead line is converted to dc voltage in electric trains?
A transformer is used. You know those big blocky things that you plug into the wall for pretty much any electronic device? Those contain a transformer with a winding ratio such that the output voltage is lowered, and usually a rectifier bridge that converts AC into DC.
