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Unfortunately, it is not practical to find the number of turns in a transformer's windings. However, what matters is its turns ratio. This can be done by applying a low AC voltage to the higher-voltage* winding, and measuring the resulting voltage appearing across the lower-voltage winding. The turns ratio will be approximately the same as the voltage ratio.
(*NOT THE OTHER WAY AROUND! Or you may up with a dangerously-high voltage induced into the higher-voltage winding!)
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What is the current in the secondary coil fi the current in the primary coil is 5.0A 10 loops on primary coil and 20 on secondary coil?
If I am not wrong then you have asked about a transformer. And its a current transformer. By theory of voltage transformer we know that Vs/Vp = Ns/Np So for answering your question we need the value of number of turns in primary and secondary coil. But you can use this equation to find your answer if you have other values. By using ohmic law you can convert voltage to current.
What is the output current of a 480 Volt primary 208 volt secondary - 3 phase transformer?
You need to mention the Load connected to find the current.
How do you find the transformer block in Alien Shooter 2?
To find the transformer block in Alien Shooter 2 you have to go down the sewer. This is one of the most thrilling games.
Diagram of a double wound transformer?
do exist! Is there a real question about d.w.t's? On a double wound transformer, the primary winding is isolated from and secondary winding, but still use the same common core.
What is the formula to calculate magnetizing current on a transformer?
Measure the primary inductance with the secondary open. Then use 6.28FL (F= frequency, L=henries) to find the reactance in ohms (unless it's a tiny transformer the dc resistance can be ignored). Once that's found use ohm's law I=V/R. If you don't have an LCR meter simply measuring no-load current will also work. If you have no meters you're in for alot of guess work as you need to know the permeability of the core material at the particular flux density/voltage it normally runs at.
How can find the primary turns of the transformer knowing the primary voltage of the transformer?
The ratio of the primary voltage to the secondary voltage is proportional to the ratio of windings. So if the primary voltage is 120 volts and the secondary is 240 volts there are twice as many turns in the secondary.AnswerAs the previous answer says, you can work out the turns ratio of a transformer, but knowing the primary and secondary voltages will not help you determine how many turns are on each winding.
A transformer has 20 primary windings and 100 secondary windings If the secondary voltage is 25 V find the primary voltage?
Voltage on primary/Primary turns = Voltage on secondary/Secondary turns
How do you find the secondary to primary transformer voltage ratio?
Turns Ratio = (Primary turns / Secondary turns) To calculate the turns ratio you have to actually know the number of turns or wraps on the primary and secondary coils. Nobody knows that usually the manufacture of the transformer doesn't even know. So what you can use as and equivalent is to calculate the voltage ratio. So what you typically need to look for is the Input voltage and divid it by the output volatge. Usually that would be as follows; (Primary Voltage/Secondary Voltage) = Voltage Ratio
What is the current in the secondary coil fi the current in the primary coil is 5.0A 10 loops on primary coil and 20 on secondary coil?
If I am not wrong then you have asked about a transformer. And its a current transformer. By theory of voltage transformer we know that Vs/Vp = Ns/Np So for answering your question we need the value of number of turns in primary and secondary coil. But you can use this equation to find your answer if you have other values. By using ohmic law you can convert voltage to current.
What is the formula for calculating transformer voltage?
There are two kinds of transformers, autotransformers and isolation transformers. An autotransformer has one coil, an isolation transformer has at least two. To find the output voltage of a transformer, you need to know three things. First is the input voltage. Next are the number of turns on the primary coil, and last is the number of turns on the secondary coil. So! Our input voltage is going to be 120 in all three of the cases I'll give, and the number of turns on the primary coil will be 120--this makes the math easy, although you aren't restricted to putting 120 turns of wire in a 120v primary. You can put a million turns on if you want, and I've seen it. If our secondary has 12 turns, the output voltage will be 12--there is a 10:1 primary:secondary ratio. Normally this is called a "stepdown" transformer. It's used when the device requires less than line voltage to operate. A secondary with 120 turns will give a 120v output voltage. This is an "isolation" transformer. You use this as a safety device. Secondaries with 2500 turns give a 2500v output voltage--perfect for radio frequency amplifying tubes like the 4CX250A. For extra entertainment let's talk about the autotransformer for a minute. As I said above, this has one coil. It's tapped. If you've got 220v coming into a 220-turn coil and there's a tap at 110 turns, you're getting 110v out of it. Every soldier stationed in a country that uses 220v power buys one of these from the local post exchange so he can use the TV set he brought from home.
Why is the wattmeter connected at the primary side of the transformer?
In general, you can install a wattmeter on the primary or the secondary side of a transformer (it depends what you are trying to measure). But if you are conducting an open- and short-circuit test (to find the transformer's losses), then the wattmeter is connected to the primary side because you want to measure the total (primary + secondary) losses and that is only achievable from the primary side.
Why is the transformer turns ratio test needed?
Turns ratio test is very important in order to find out that the transformer has the right ratio corresponding on its rated voltage in primary and secondary. For example, three phase transformer is subjected to turns ratio test when each phase has equal turns ratio then the transformer is balance.The test is performed to ensure that overheating or overcurrent conditions have not shorted turns in the transformer windings, which would distort the desired output or input voltage. This test is particularly important for instrument transformers, i.e. CTs and PTs which are connected to protective relays. These relays are extremely sensitive, and operate on very small fluctuations in secondary voltage or current. Shorted turns in these transformers can lead to big problems if they cause the relay to operate abnormally, or not at all.
Can one intentionally short ct to one side of transformer?
yes........ we can short circuit the other side of the winding wen the primary is excited.... but we shouldn't apply rated voltage to the primary.. this method is used in the short circuit test of the transformer to find the parameters of the transformer.....
A transformer has primary voltage of 240v and a secondary voltage of 48v what is the turns ratio of this transformer?
The turns ratio of a transformer is directly proportional to the voltage.To find the number of turns in the secondary, first calculate the voltage ratio.24V/115V is a 1:0.2087, if we use this ratio to calculate the turns we get.345 x 0.2087 = 72 turns.Another idea to apply (which says the same thing) is that the ratio of the voltages will equal the turns ratio. Here's how that looks:Voltageprimary / Voltagesecondary = Turnsprimary / Turnssecondaryor justVp / Vs = Tp / TsPlugging in the numbers will give us115 volts / 24 volts = 345 turns / Ts , and 115/24 = 345/Ts , and 115 x Ts = 24 x 345 , and Ts = (24 x 345) / 115 , and Ts = 8780 / 115 = 72 turns.
A transformer has 520 turns in its secondary coil and a secondary output voltage of 480 volts The primary coil has 40 turns What is the primary voltage?
36.9 volts Explanation: A trafo works in ratios, much the same as percentage. Easily calculated in this question . 520 turns and 480 Volts secondary. We find the Voltage of each turn by dividing Voltage by turns. 480/520=0,9230769231 Volt. Then multiply this by primary turns of which is 40. 40*0,9230769231 =36,9230769231 Volts. More related info: This is the AC voltage. In order to find a quite accurate estimate for a rectified DC output with a charging capacitor, simply multiply the AC voltage by 1.44
How should I calculate this. A single phase transformer is rated at 99kVA The primary voltage is 6.6kV and the secondary voltage is 220V Assume no losses and calculate The full load primary current?
First find the ratio of the transformer. 6600/220 volts. Second find the secondary current, I = W/E, 99000/220. Third divide the secondary current by the transformer ratio. The answer will be the primary current. To check your answer (W (or VA) = V x A) multiply the primary current times the primary voltage and the secondary current times the secondary voltage and they should both equal the transformer's kVA.
A 240V to 480V Step up transformer with a load of 85 amps at 480v what amperage will the transformer draw if the primary is 240V?
Since this transformer has a ratio of 1:2 the load current on the 480V side just has to be doubled. 85 x 2 = 170A on the primary. 40.8 KVA transformer. To prove this just find the KVA of both sides and they should be equal.
