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Tuesday, October 18, 2011


1. Definition and function POWER TRANSFORMERS

The transformer is an electrical device which serves to channel the power / energy from high voltage to low voltage or vice versa.The transformer uses the principle of faraday law of induction andthe Lorentz law in distributing power, where the alternating currentthat flows around an iron core iron core then it will turn into a magnet. And if the magnet is surrounded by a winding it on both ends of the windings is the potential difference will occur (Figure1.1).
Figure 1.1. Alternating current around an iron core
Current flowing in the primary winding will induce iron coretransformer that will flow in the iron core and the magnetic flux of this magnetic flux will induce a secondary winding secondarywinding so that at the end there
will be a potential difference(Figure 1.2).
Figure 1.2. The working principle of transformer

2 Types of power transformer

Based on the power transformer function can be divided into:
• Transformer power
• The transformer substation / distribution
• the distribution transformer

Power transformers for the distribution function can be dividedinto:
• a large transformer
• Transformer is
• a small transformer
large transformer


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