How to Identify primary and secondary of a transformer
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how to find primary and secondary winding of transformer?This video is about that topic
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.It works on Faraday's law of induction.A transformer is made of a soft iron coil with two other coils wound around it, but not connected with one another. The iron coils can either be arranged on top of another or be wound on separate limps of the iron core.
Transformers are used to increase or decrease the alternating voltages in electric power applications.There are two types of transformers, namely: Step down and Step up transformers. Generally, the difference between them is the amount of voltage produced, depending on the number of secondary coils.
The transformers which are used to increase the alternating voltages in electric power applications are called step up transformers.. There are many turns on the secondary winding than in the primary winding in the step-up transformers. Thus, the voltage supplied in the secondary transformer is greater than the one supplied across the primary winding. Because of the principle of conservation of energy, the transformer converts low voltage, high-current to high voltage-low current. In other words, the voltage has been stepped up.
A step-down transformer is the direct opposite of a step-up transformer.In a step-down transformer is one who secondary windings are fewer than the primary windings. In other words, the transformer’s secondary voltage is less than the primary voltage. So, the transformer is designed to convert high-voltage, low-current power into a low-voltage, high current power and it is mainly used in domestic consumption.
Step down transformers are widely used in many electronic circuits.It is important to find out the primary and secondary side
of a transformer.There are different ways to find it out.One way to identify it by the resistance of the winding.In case of a step down transformer,secondary side has less no of turns than that of primary side.Since resistance depends on length of wire,so secondary side has less resistance than the primary side.For step up transformer,it is opposite to step down transformer..
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Thank you very much. So simple and easy to understand . I don't care for the bad comments about saying in first place that it is a step down transformer, cause the basics of the information is there so well explained. It's like giving the answer in math problem and do it after to make the proof of your answer. Than, you
Thank you, just what I needed to know without lots of waffle.
Thank you, it helps me a lot.
Is it applicable for EE19-A28A Transformer taken from receiver power supply?
What you call primary and secondary depends on which side you want to use as input and output. If you use the high number of turn side (high resistance) as primary (input), it will become a step-down transformer = lower voltage and higher current on the secondary side (output) and vice-versa.
Are there any considerations when using two transformers back-to-back to get high voltage cheap?
@@anti_globalista higher voltage = less current. Power = current x voltage, if power available is constant, current and voltage will be tied to each other according to this formula.
@@dongpedroyi I know Ohm's law. What are you actually saying? That two transformers must be same in power to use them back-to-back?
@@anti_globalista I am not getting what you mean by two transformers back to back. Can you explain in more detail?
@@dongpedroyi You connect secondary of first transformer (step down) to secondary of another (step up) and get high voltage transformer VERY cheap (only first is connected to mains). It's called back-to-back. You can see example in this video th-cam.com/video/yp_EKyv2ZLc/w-d-xo.html
Robojax I want to know whether Transformer phasing out as most of the people are using AC-DC adapter, LM7805 and LM2596 types converter and why? Must reply!
Nice bro
Would if primary winding is open on a bad transformer. How do determine voltage outputs on two secondary windings??. No markings on bad transformer
Bro in my transformer it has pair of black and yellow what I do plz told me
Great.
It can be either one, step up or step down Depends on which set of coils you connect to the power source. One set will step the voltage up and the other set will step it down. If the coils with the most turns and higher resistance is connected to source voltage it will step the voltage down. If the coils with the least resistance, and having fewer turns is connected to source voltage then it will act as a step up transformer. Usually the side with thicker wire indicates a higher current so it will be the lower voltage side. The amount power dissipated on the side used as the primary set of coils (connected to source) will be close to the amount of power dissipated on the secondary set of coils (connected to load). There is minimal losses due to Eddie current and other factors but for all practical purposes in the following equation we will assume that they are equal. We know from Ohms law that E=I×R, and P=I×E where E is the electro motive force or Voltage, I is current, P is Power, and R is resistance. So if Power in equals power out then this means if a voltage is applied to the side with most resistance the current flow will be lower on this side, so the voltage on the other side must decrease causing the transformer to function as a step down transformer. The voltage will be steped down. The amount the voltage is stepped up or down depends on the turns ratio of the transformer.
If the side with fewer windings or less resistance is connected to the source voltage then the current due to less resistance will be higher on the primary side if current goes up and the source voltage stays the same then the power dissipated will increase as well. But the output voltage will be steped up by a factor of the greater number of winding turns that one coil has for each one winding turn in the other coil. In a tranformer with a turns ratio of 10:1 if used as a step up transformer, the voltage on the side with the most resistance will be the side with the most windings. This means that the voltage on the higher resistance side will be 10 times greater than the voltage on the lower resistance side. Lower resistance means higher current flow, as current goes up the voltage must go down. Remeber we already established that for all practical purposes power in is equal to power out. Usually the side with the less turns and least resistance will use heavier guage wire due to higher current flow.
thanks bro
How to identify output and input wire in transformer
@KhanAfridi-wn9ic assuming it's not a tapped transformer, and it's a good transformer with no opens (breaks) or shorts in the coil wires. It will have four leads. Any two leads that show continuity between them will go to one set of coils. The two remaining leads, when checked, will also have continuity between them, and this is also a set of coils. Again, step-down, or step-up, just depends on which set is connected to source voltage. A third type of transformer is an isolation transformer, or 1 to 1 transformer. It's called this because the number of turns on the primary (input coils) are the same as the secondary (output coils) this turs ratio of 1:1 ieadly gives you the same AC out put as the your input. But it isolates the circuit from the source. Without going into detail, I have seen these used in welders, and for very good reason.
Can you plz make a video to identify multiple primary and secondary coil windings. You are explanation is simple powerful clear easy to understand. Lot of math calculation will be confusing for beginners Amature hobbist like me.
the title is 'how to identify primary and secondary of a transformer', NOT 'of a step down transformer'. the first thing you say is "this is a step down transformer", without any explanation. why do you immediately invalidate your test ? what if we don't know if our transformer under test is a step up or step down or something else ?
That sounds like a you problem lmfao
That's exactly my issue. What do I do then?
Good
I just realized that near the end of your presentation, I do believe you stated your secondary and primary coils wrong for a step-down transformer according to the resistances that you measured.
thanks buddy
+Sagar Shirode Thank you for supporting us
Thanks for keeping it short and speaking properly.
Thank you for your valuable comment
great comment, it was valuable, so thank you
So how to you know it is a step-down and not step-up transformer?
are you at the top or the border of it? a comment, so valuable , so there is thank you
What if it's step up transformer
so witch one gets pluged in to the power outlet
The primary one(red color) must be connected to ac mains.
How to identify the 110 vs 220 connections of a three-wire primary (black, blue, red)?
the 220 connections require the "full length" of the coil on the primary side since the secondary voltage is inversely proportional to the number of primary turns. To get the same specified secondary voltage you would need twice as many turns on the primary side. Usually this is obvious by inspection as the center tap on the primary to either end will be 110 V and the two "outside" taps are for 220 V. You could also measure the resistance with DIMM between two (primary) terminals. The two terminals having the higher resistance are the high voltage one (220) and the other two pair of terminals will have approximately half this resistance are are intended for 110 V. Finally you can simply hook the leads up to an oscilloscope and use a function generator set for 60 Hz and some low voltage (say 5 Vpp) and see what comes out of the secondary.
Trying to find a replacement power transformer
Depends if it's a step down or step up transformer
I think, in this case, transformers work either way. "Step up" or "Step down" is just the way they are marketed. On several applications in the long distant past (read "before low cost 12v to 110v inverters"), I fed the "secondary" of a 12v transformer with 12vac to get 110vac out the "Primary" side. Worked fine for years.
I bought a transformer and the label says 110/220 primary (red black red wires) , 12 0 12 secondary (blue white blue) . Now my question is how to identify the 220 volts and 110 volts in primary?
110/220 is the input voltage to the transformer. You don't need to measure it. In india it is 220 V.
110/220 primary (red black red wires)
means if you use 2 red wire then connect to 220 volt ac mains, and
if one red and one black then connect to 110 volt ac mains
No, are you from india?
@@DPVTECHNOLOGY
yes from india,
can you tell me the use of black wire or the 3rd wire in primary winding.
You have bought centre tapped transformer ? Means one side has three wires ( red black red) and other side has two wires. Am I correct?
👍👋🙏🙏
Kya 12 0 12 transformer Step-up transformer hota h jisme secondry wire 3 hote h
R jisme primary r secondry dono 2 wire hote h wo step-down transformer hota h ????
+SURAJ KUMAR
Thank you very much for your comment.
The 12-0-12 transformer is Step down transformer.The three wire side is secondary side.You will get 12 volt or 24 volt according to your setup.We will upload video on this topic very soon.
Coming to your second question,the transformer in which two wires in both primary and secondary, can be step up or step down.For finding out primary and secondary,you can use our method given in the video.Hope you will get it.
Happy new year in advance..
SURAJ KUMAR mG op tr
In transformers no side is primary or secondary. We call them high voltage side or low voltage side.
Baat ek e he bro... You cant change the power supply of electricity so that has to remain primary in any case.
Not necessarily true. There are also step-down and step-up transformers.
Nothing is Primary and Nothing is Secondary sir.....
All things is depending on how we use a transformer ( i.e step up or step down )
well at least you will find out what step your going to use.