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A transformer has a primary volt of 240v and a secondary volt of 48v what is the turn ratio?
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Why does the primary side of a step down transformer burn out and not the secondary of a 480V to 240V transformer?
Sounds like the wrong size fuse protection was used. The transformer should be protected to its kva capacity.
How can you convert 240v to 120v for ac?
Use a step down transformer 240 primary to 120 secondary. You must know what the connected load (amps) is so that you don't overload the transformer. Small transformers are rated in VA.
If you put a 60W 120V bulb in a 120V lamp that has a transformer for 240V and plug it into a 240V outlet will it work or blow the circuitry?
Off hand no but your explanations are not clear as to who is doing what to whom,,
What are the application of core type transformer?
The main application for a core type transformer is to increase voltage from a standard 240v supply up to 415v instead of using a 3 phase supply.
What is normal house current three wire single double or three phase?
Normal house current is two-phase, 240V. What comes into the house is two hots and a neutral. From hot to hot you get 240V and from either hot to neutral is 120V. In the electrical trade there are only single phase and three phase systems. The reason it is called single phase is that the primary connection on the high voltage side is one leg of a three phase system. This 3 PH system is usually about 12500 volts. On the primary side of the transformer, the connection is between one phase of the three phase system and ground usually in the area of 12,500/1.73 = 7225 volts. The secondary side of this transformer is 240 volts with a grounded center tap. As stated above this is where the 240, 120 voltages come from.
Can a 240V - 110V stepdown transformer be reversed to take a primary load of 180V to secondary 240Volts?
No
What is the turn ratio of a transformer if the primary voltage is 240V and the secondry is 12V volts?
240 / 12 = 20
Why does the primary side of a step down transformer burn out and not the secondary of a 480V to 240V transformer?
Sounds like the wrong size fuse protection was used. The transformer should be protected to its kva capacity.
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.
How do you compute the turn ratio of 3kva 240 v primary and 200 v secondary side?
200V / 240V 5 / 6
How can you convert 240v to 120v for ac?
Use a step down transformer 240 primary to 120 secondary. You must know what the connected load (amps) is so that you don't overload the transformer. Small transformers are rated in VA.
Can you run your neon sign of 120v 50hz 60hz 0.6a 7.5kv 30mA in an Australian 240v power outlet?
No. The neon sign is fed by a step-up transformer. Primary side 120V, secondary side 7500V. If you applied 240 to the primary side you would get 15000 volts on the neon tube. A flash over and then nothing. If you can find a transformer from 120V to 240V or 240V to 120V then you are good to go. Connect 240V to 240V side and you will get 120V out the other, connect the 120V side to the neon sign and you should have light. Transformer should be at least 100va. This will give you an output of .83 amps at 120V
In a step up transformer how does the current drop if the voltage rises?
Transformers are rated in KVA, both the primary and secondary windings have the same KVA rating. (KVA is the voltage multiplied by the amperage then divided by 1000). If you have a 10 KVA step up transformer with 120V on the primary: A = 10k / 120 = 83.33A and if the secondary produces 240V: A = 10k / 240 = 41.667A
Determine the secondary and primary current for a transformer which has primary voltage 1440V and secondary 240V and turns ratio of 6 if the secondary is loaded with a resistive load of 60 ohms?
An ideal lossless transformer with a primary voltage of 1440 and a secondary voltage of 240 will deliver 4 amperes to a 60 ohm load by ohms law 240 volts divided by 60 ohms causes 4 amperes to flow through the 60 ohm load. The power delivered to the 60 ohm load will be 4 amperes times the 240 volts or 960 watts. The current in the primary is divided by the primary to secondary ratio of 6. Thus, the primary current will be 4 amperes divided by 6 or 2/3 ampere. The power going into the primary will be 1440 volts times 2/3 amperes or 960 watts. In a real transformer there is losses that make the numbers change. The output voltage will be slightly less and the resistance and reactance of the windings lower the output.
What is the voltage in the secondary coil if the primary coil is supplied with 120V?
I assume that you are speaking theoretically, as it is unlikely that a practical transformer will have just ten turns ('loops') in its secondary coil. In any event, you have not provided sufficient information to be able to answer your question, as it's necessary to know how many turns there are on the primary winding.
What KVA transformer is needed to convert 480v - 240v 13.5A load?
Ohms law says that watts are equal to volts times amps. 240v X 13.5a = 3240 va VA / 1000 = Kva So, your load requires 3.24 Kva. The transformer should have a rating greater than this as a safety factor, so you would choose the next larger size, in this case probably a 5 Kva transformer with a 480v primary and a 240v secondary. Your local electrical codes may require a larger safety factor, so you would want to consult them before buying the transformer!
Can a 240v - 110v stepdown transformer be reversed to supply from180V stepping up to 240Volts?
Transformers can be reversed but their ratio remains the same. In this case a 240 to 120 volt step down transformer has a ratio of 2:1. By reversing the transformer and using 180 volts on the secondary side, there would be a potential of 360 volts on the primary side of the transformer. Also by using the higher voltage on the secondary side, stepping up will drive the primary side voltage above what the insulation factor that is recommended which is 240 volts.A 240/120 v transformer is designed to run at that voltage, and it is dangerous to operate it at a significantly higher voltage because there will be appreciably higher magnetic flux in the iron core, leading to higher power dissipation and a potential fire hazard.For a great explanation of how transformers operate, see related links below.
