How Does an Isolation Transformer Protect From Electric Shock - Ningbo Wanji Electronics Science & Technology Co., Ltd.

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How Does an Isolation Transformer Protect From Electric Shock

An isolation transformer is ideal for solving the problems of electric shock and power surge.

Electric shocks can damage and destroy electronic devices. Most electronic devices are designed to operate at low voltages. With an isolation transformer, the voltages over generated will not ripple through all stages of the circuits.

Primary Coil

When a shock or voltage surge hits an isolation transformer, the current in the primary winding tries to rise very fast. The inductance of the primary coil opposes the change in current. This slows the rise and fall of the current. At the same time, the magnetic field of the primary coil will rise and fall. The rate at which the current in the primary coil of the isolation transformer changes will determine how much current makes it to the secondary coil. If the rate of change increases, more current will be induced into the secondary coil. If the rate of current change in the primary coil of the isolation transformer is reduced, less current is induced in to the secondary coil.

Secondary Coil

The magnetic field generated by the change in current in the isolation transformerprimary coil now begins to induce a new current in the secondary coil. The inductance of the isolation transformer secondary coil also opposes to change in current which further reduces the rate of change of the current. The current that emerges from the secondary coil of the isolation transformer is has a reduced voltage and current compared to the initial shock that entered the system.

The above is the detailed explanation of how an isolation transformer protect electric shock in a circuit.

Next Page: Isolation Transformer Theory

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