配電系統(tǒng)中220伏轉(zhuǎn)220伏的變壓器叫隔離變壓器，隔離變壓器的初級、次級繞組圈數(shù)是一樣的。利用電磁感應(yīng)原理使得輸入、輸出電壓一樣，可以避免觸電。

交流電的火線跟大地的電勢差為220伏，如果不小心觸碰就會觸電。因?yàn)楦綦x變壓器的輸入、輸出繞組是完全絕緣的，隔離變壓器的次級不與大地相連，任意一條線與大地都沒有電勢差，只接觸一條線就不會觸電，更為安全。由于初級、次級完全斷開，還可以起防干擾的作用。車床控制、維修電源、壓縮機(jī)等應(yīng)用都會使用隔離電源。

Why is a medical isolation transformer safe?

In power distribution systems, a transformer that converts 220 volts to 220 volts is called an isolation transformer. The primary and secondary windings of an isolation transformer have the same number of turns.

It utilizes the principle of electromagnetic induction to ensure that the input and output voltages are equal. Isolation transformers can prevent electric shocks.

In alternating current (AC) systems, there is a 220-volt potential difference between the live wire and the earth, so accidental contact with the live wire can result in an electric shock. Because the input and output windings of an isolation transformer are completely insulated, the secondary side of the isolation transformer is not connected to the earth, and there is no potential difference between any of its wires and the earth. Thus, touching only one wire will not cause an electric shock, making it safer to use. In addition, since the primary and secondary sides are completely isolated, it can also play a role in anti-interference. Isolation power supplies are widely used in lathe control, maintenance power supplies, compressor, and other applications.