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Before installing the auto transformer there are a few things that have to be looked into. First the transformer has to be sized to the load that you have. Once the secondary load is determined the amperage of the load has to be determined to find the wire size for the secondary feeders. One the secondary has been calculated the primary feeders have to be ampacity calculated as to sizing. This will be determined by the voltage ratio between the two voltages that you will be working with. The higher the primary voltage the smaller the wire size due to the lower amperage. Once the amperage of the primary feeders are determined then the breaker for the supply can be found. Remember that transformer feeders have to be rated at 125% capacity of the primary current.
Keeping the above in mind, if you re ask the question with all of the values in place, instruction on how to put it all together will be forth coming from this answerer.
What else can I help you with?
Auto transformer for a single phase motor starter?
Nah doesnt exist
What is single phase ac generator?
It's an electrical generator converting mechanical power into electrical power. The electrical power comes out in the form of single-phase alternating current.
What does auto in autotransformer stands for?
"Auto" refers to the single winding used an auto transformer.
What type of transformer has only a single winding?
the auto transformer is the one winding transformer. it ismaily used in practical purpose.
What is the difference between Auto transformer and Power transformer?
An auto transformer has one winding with the output being tapped at some point and therefore has no isolation between primary and secondary. This may make it unsafe or illegal in some applications. A common power transformer has separate windings.
What are the advantages of double wound transformer over a auto transformer?
The difference between a double wound step up transformer and an auto transformer is the double wound on the step up transformer and the single wound on the auto transformer.
Can you use ordinary transformer in place of auto transformer?
yes we can place auto transformer in place of original transformer
Why auto transformer is lighter than conventional type?
because the copper is saved in the auto transformer that is the ratio of weights of copper in auto transformer to normal transformer is (1-(1/a)) where a is transformer ratio
How many coils does a autotransformer have?
only single coil is use as a primary and secondary coil in a auto transformer.
Voltage across Neutral and earth for a 3 phase auto transformer?
A grounded neutral will be at earth potential. A floating neutral will be at a voltage dependent upon the voltage imbalance between phases, and the design of the transformer.
Why earthing transformer is zigzag connection?
A zigzag transformer is used in connection with 3 phase and is made up of 6 coils connected in a "Y" manner. Each leg of the "Y" is made up of a coil on a different phase leg of the transformer. The neutral formed by the zigzag connection is very stable. Therefore, this type of transformer, or in some cases an auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer, lends itself very well for establishing a neutral for an ungrounded 3 phase system. Many times this type of transformer or auto transformer will carry a fairly large rating, yet physically be relatively small. This particularly applies in connection with grounding applications. The reason for this small size in relation to the nameplate KVA rating is due to the fact that many types of grounding auto transformers are rated for 2 seconds. This is based on the time to operate an overcurrent protection device such as a breaker. Zigzag transformers used to be employed to enable size reductions in drive motor systems due to the stable wave form they present. Other means are now more common, such as 6 phase star.
How do i convert from 380 volts to 220 volts?
If these are the exact voltages that you need you will need an auto transformer to obtain these voltages. If these voltages are nominal voltages and are of a three phase four wire configuration, the 220 voltage can be obtained from the three phase legs to the neutral (ground) connection. The equation to use is 400/1.73 = 231 volts.
