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The role and principle of isolation transformer - low voltage transformer

Date of issue：2021-11-16 General view：78

What is an isolation transformer? An isolation transformer refers to a transformer with electrical isolation between the input winding and the output winding. The isolation transformer is used to avoid accidental contact with live objects at the same time. The isolation of the transformer is to isolate the respective currents of the primary and secondary windings. In the early days, it was used in the power industry in European countries, and it was widely used in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment in general circuit control power supplies, safety lighting and indicator lights. 2. Why use isolation transformers must first understand my country’s power supply system. When supplying low-voltage users, my country’s power supply system generally adopts a three-phase system. Live wire), the other is the neutral wire, which is at the same position as the earth. When the human body touches the hot bottom plate, it will cause current to pass through the human body and form a loop with the earth, causing electric shock hazards. If you use an isolation transformer, it will be safer, because the primary and secondary exchange energy through a magnetic field, and there is no physical hard connection. Low potential, will not cause electric shock hazard. 3. The role of the isolation transformer The main role of the isolation transformer is to completely insulate the electrical on the primary side and the secondary side, and also isolate the circuit. In addition, the high-frequency loss of its iron core is used to prevent high-frequency clutter from entering the control loop. Using an isolation transformer to suspend the secondary to the ground can only be used in occasions where the power supply range is small and the line is short. At this time, the capacitance current of the system to ground is too small to cause personal injury. Another very important role is to protect personal safety and isolate dangerous voltages.

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The role and principle of isolation transformer - low voltage transformer

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