隔变压器（Isolation transformer）.doc

隔变压器（Isolation transformer） The neutral line of the exchange that we normally use is grounded. There are a lot of harmonic and stray magnetic fields in the exchange of electric current, so the disturbance is very large. The barrier transformer is a 1-1 transformer. The lower level is 220v and the secondary is 220v. The secondary insulation of the transformer is not connected to the ground. Because it is not connected with the ground, it reduces the amount of clutter and thus reduces the disturbance. The barrier transformer is designed for the safety of some electrical appliances. In repair the color TV set, for example, because of the color TV power supply mains are linked together, and local if repair staff do not pay attention to suffer from the opportunity of the partial circuit, will lead to get an electric shock, endanger personal peace. Next, when repairing some household electrical appliances, should also connect the barrier transformer. To clarify a bit, cut off is a 1:1 transformer, also is to say, its junior and secondary turns and the thickness of wire diameter is very, no distinction between junior and secondary, which side of the winding is connected to the mains is the same. It is important to note that the principle of blocking transformer is that the power of the barrier transformer must be greater than the power of the electrical appliances repaired. We know that the civil interchange is a single-phase swap, one of which is the front (phase line), the other is the zero line, which is grounded. People are electrocuted in the front of the encounter, because the human body is zero potential. Cut off with the transformer, even if it is 1:1, voltage did not change, but its secondary as long as not grounding, people suffered from the opportunity which a thread (note: only touch a line at the same time) dont get an electric shock. 【 2 】 The barrier transformer is commonly used as the peaceful transformer, which is used to block the impurities and maintenan