What is the difference between isolation transformer and ordinary transformer.

1, the main task is different:

Ordinary transformer main task is to change the voltage, divided into step-down transformer and step-up transformer, the original side coil turns are not equal. Isolation transformer is not the main task of ordinary transformers, some transformers are not isolated from the original side, such as autotransformers are typical.

2, different definitions:

Isolation transformer refers to the primary and secondary coils are separated in the DC circuit. Ordinary transformers used in machine tools, equipment control lines used in the transformer, generally high voltage into low voltage.

3, the use of different:

Isolation transformer is mainly to isolate the power supply and load, so that the two sides do not have a direct electrical connection. Generally used in low-voltage instruments and experiments. Ordinary transformer is based on the voltage and current needed for electrical equipment, control them in a need to use the range.

Classification:

1, according to the number of phases:

1) single-phase transformer: used for single-phase loads and three-phase transformer group.

2) three-phase transformer: used for three-phase system step-up and step-down voltage.

2, according to the cooling mode:

1) dry-type transformer: rely on air convection for natural cooling or increase fan cooling, mostly used in high-rise buildings, high-speed toll station electricity and local lighting, electronic circuits and other small capacity transformer.

2) oil-immersed transformer: rely on oil as a cooling medium, such as oil-immersed self-cooling, oil-immersed air-cooled, oil-immersed water-cooled, forced oil circulation.

Principle of operation

Transformer by the iron core (or core) and coil composition, coil has two or more windings, which is connected to the power supply of the winding called the primary coil, the rest of the winding called the secondary coil. It can transform AC voltage, current and impedance.

Transformer is the use of electromagnetic induction principle made of static electrical appliances. When the primary coil of a transformer is connected to an AC power source, alternating magnetic flux is generated in the iron core, and the alternating flux is represented by φ.

Reference:

Baidu Encyclopedia-Isolation Transformer

Reference: