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What happens with the primary voltage in step down transformer?
Wiki User
∙ 11y ago
The power going into a transformer (primary) is the same as the power leaving a transformer (secondary).
P=VI Power = Voltage X Current.
A step down transformer means that the voltage leaving a transformer is less than the voltage entering the transformer. The power out is the same as the power going in, so if the voltage is less, the current must be greater. Well said. This is why Transformers are rated in VA, on bigger transformers KVA. Both sides have to be equal.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoA: A transformer sole purpose is to covert the primary to the secondary by a turn ratio x:x the secondary will always have less power available with reference to the primary because of efficiency. Basically it is a kva converter. If the primary has 1000v and 1 amp meaning 1 kva the output can only have 10000 volts and .10 amps disregarding efficiency losses
Wiki User
∙ 11y agoIn an ideal transformer, Power In = Power Out
Example: The input voltage of 115vac @10amps is stepped up to 230vac, so what
is the secondary current?
115 x 10 = 230 x I
I = 115 x 10/230
I = .5 x 10 = 5 amps
The current is stepped down to 5 amps from 10 amps
Wiki User
∙ 11y agoIn an ideal transformer (one without any losses) the secondary power is the same as the primary power. For example, say the rated secondary power is 1000 W and the rated secondary voltage is 100V, then the secondary current must be 10 A. If the primary rated voltage is 10 V, then the primary current must be 100 A.
Wiki User
∙ 13y agoNo, the voltage is higher and the current is lower. The transformer has to maintain its VA on both sides of the winding.
Wiki User
∙ 13y agoA: The question is improperly stated .It can only be said that the power input can never be less then the output wether is step up or step down
that is the right answer
Wiki User
∙ 11y agoThe primary voltage is determined by the supply, so nothing happens.
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HOW do I SELECT A STEP DOWN TRANSFORMER?
By looking to the number of turns in the Primary and Secondary Coils. "A Step down transformers are designed to reduce electrical voltage. Their primary voltage is greater than their secondary voltage. This kind of transformer "steps down" the voltage applied to it."
What is the different between et up and set down transformer?
the difference between a step up transformer and a step down transformer is that, in a tsep up transformer, the voltage secondary is greater than the primary side but in a step down transformer, the voltage secondary is lesser than the primary side
What are step-up and step-down transformers?
A Step Up Transformer is one whose secondary voltage is greater than its primary voltage. This kind of transformer "steps up" the voltage applied to it.The Step Up transformer is designed to increase the voltage from the primary winding to the secondary winding.A Step-Down transformer is one whose secondary voltage is less than its primary voltage. The step down transformer is designed to reduce the voltage from the primary winding to the secondary winding. This kind of transformer "steps down" the voltage applied to it.The basic equation for stepping up or stepping down the voltageNp/Ns is known as the turns ratio.The induced voltage in the secondary winding (Vs) is in proportion to the primary voltage (Vp) and is given by the ratio of the number of turns in the secondary (Ns) to the number of turns in the primary (Np).I to answer basic transformer questions.
Can you use a step down transformer as a step up transformer by reversing the secondary voltage as a primary voltage?
Yes a Tesla coil or ignition coil is an example.
What value for a transformer determines the amount of voltage that is stepped up or down?
For an ideal transformer, the voltage ratio is exactly the same as its turns ratio. So if, for example, there are twice as many turns on the secondary winding as there are on the primary winding, then the secondary voltage will be twice that of the primary and the transformer will be a 'step up' type.
What happens if a 208VAC primary voltage is connected to a 240VAC stepdown transformer to 208VAC?
The transformer will act as a step down transformer in the ratio of 240 to 208. This will reduce the 208 input to 180.
HOW do I SELECT A STEP DOWN TRANSFORMER?
By looking to the number of turns in the Primary and Secondary Coils. "A Step down transformers are designed to reduce electrical voltage. Their primary voltage is greater than their secondary voltage. This kind of transformer "steps down" the voltage applied to it."
What is the different between et up and set down transformer?
the difference between a step up transformer and a step down transformer is that, in a tsep up transformer, the voltage secondary is greater than the primary side but in a step down transformer, the voltage secondary is lesser than the primary side
Summary of the step-down transformer?
A step- down transformer is one whose secondary voltage is less than its primary voltage, it is used to reduce 'step down' the voltage applied to it. The number of coils in the primary circuit is greater that the secondary circuit. For instance, to step down 480 Voltage to 240 voltage, you need a step down transformer whose ratio of primary coils to secondary coils is 2:1.
Does a step-down transformer increase its voltage and and decrease it's current?
No. A step-down transformer's secondary voltage is lower than its primary voltage. The secondary current is determined by the load, and this causes a higher current in the primary winding.
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.
If a transformer has 20 primary windings and 100 secondary windings and the secondary voltage is 25 what is the primary voltage?
Transformer step-up/step-down voltage is turns-ratio, so if a transformer has 20 primary windings and 100 secondary windings (a turns-ratio of 1 to 5) and the secondary voltage is 25, then is the primary voltage is 5.
What are step-up and step-down transformers?
A Step Up Transformer is one whose secondary voltage is greater than its primary voltage. This kind of transformer "steps up" the voltage applied to it.The Step Up transformer is designed to increase the voltage from the primary winding to the secondary winding.A Step-Down transformer is one whose secondary voltage is less than its primary voltage. The step down transformer is designed to reduce the voltage from the primary winding to the secondary winding. This kind of transformer "steps down" the voltage applied to it.The basic equation for stepping up or stepping down the voltageNp/Ns is known as the turns ratio.The induced voltage in the secondary winding (Vs) is in proportion to the primary voltage (Vp) and is given by the ratio of the number of turns in the secondary (Ns) to the number of turns in the primary (Np).I to answer basic transformer questions.
Where is a step down transformer used?
Outside your home. It brings the primary voltage down to secondary voltage 120/240
Can you use a step down transformer as a step up transformer by reversing the secondary voltage as a primary voltage?
Yes a Tesla coil or ignition coil is an example.
Does a basic transfomer in its normal operation use step up voltage step down voltage step up current or all?
A transformer has a primary and a secondary side. There is a ratio of windings from one side to the other that dictates whether it is a step up or step down transformer. The transformer is usually marked as to the input and output specifications. The current is directly proportional to voltage. If you had a transformer that was a step up from primary to secondary, it would be step down from secondary to primary.
Is it a step up or a step down a transformer has 20 primary windings and 100 secondary windings the secondary voltage is 25v?
If a transformer has 20 primary windings and 100 secondary windings, it is a step up transformer. If the secondary voltage is 25v, the primary voltage will be 5v, because the turns ratio is 20 to 100, or 1 to 5.
