Dry-type transformer manufacturersIntroduction, dry-type isolation transformer is widely used in AC 50Hz to 60Hz, voltage below 660V circuit. The various input and output voltages of the product, the connection group, the number and position of the adjustment tap (usually ± 5%), the distribution of winding capacity, the configuration of the secondary single-phase winding, the use of the rectifier circuit, and whether the housing is required, can be carefully designed and manufactured according to user requirements.

Working principle of 1. dry-type isolation transformer

Dry-type transformer manufacturers said that the principle of dry-type isolation transformer is the same as that of ordinary transformers, using the principle of electromagnetic induction. An isolation transformer usually refers to a 1:1 transformer. Since the secondary coil is not grounded, there is no potential difference between the wire in the secondary coil and the ground, which makes the instrument safer and is usually used for power maintenance. Not all isolation transformers are 1:1 transformers. The power supply of control transformers and electronic tube equipment also belongs to isolation transformers, which are widely used in air conditioning, maintenance and other fields.

Function of 2. type isolation transformer

Dry-type transformer manufacturerssaid,Dry-type isolation transformers are mainly used to isolate electrical equipment from the grid for safety or anti-interference requirements. The electrical equipment has no direct electrical connection to the power supply. The two coils on the primary side and the secondary side of the isolation transformer are not directly electrically connected, and electromagnetic-to-electrical conversion is performed by a magnetic field. In this way, the odd harmonics on the primary side can form a loop current in the primary side winding through the delta connection of the primary side three-phase winding, and will not flow to the secondary side, thereby reducing harmful harmonics in the power grid.

Application of 3. Dry-type Isolation Transformer

1. Isolation transformer (delta/star) connected to the power input terminal

1. If the third harmonic and interference signal of the power grid are serious, the △/Yo isolation transformer can be used to remove the third harmonic and reduce the interference signal.

2.△/Yo isolation transformer can be used to generate new neutral line, so that the equipment has nothing to do with the neutral line of the power grid, and avoid abnormal operation of the equipment due to poor neutral line of the power grid.

3. The current waveform distortion caused by nonlinear loads (such as third harmonics) can be isolated without polluting the power grid.

2. Isolation transformer (star/delta) connected to the output of the power supply

1. Prevent nonlinear load current distortion, affect the normal operation of the regulated power supply and return to the grid, and play a role in purifying the grid;

2. Nonlinear load current distortion affects sampling accuracy. You can sample/△ isolation transformer at the input of Yo to obtain a control signal that can reflect the actual situation, so that the regulated power supply can be controlled normally;

3. If the load is unbalanced, the use of Yo/△ will not affect the normal operation of the regulated power supply.