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what Is Isolation Transformer Isolation Transformer In Ups—Joinwin Knowledge

what Is Isolation Transformer Isolation Transformer In Ups—Joinwin Knowledge

September 11 , 2023 0

Isolation transformer refers to the input winding and output winding with electrical isolation of the transformer, isolation transformer to avoid accidentally touching the charged body at the same time, the isolation of the transformer is to isolate the original and secondary winding coil of the respective current. Early for the European countries used in the power industry, widely used in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment in the general circuit control power supply, security lighting and indicator power. The primary side, the secondary side of the winding between the higher insulation strength to isolate the different potential to inhibit common mode interference of the special transformer. The ratio of isolation transformer is usually 1:1.

What Is An Isolation Transformer? Difference Between Isolation Transformer And Ordinary Transformer?

Isolation transformer, also known as safety transformer, is the input winding and output winding with electrical isolation of the transformer, is used for two or more coupled circuits for electrical isolation of the transformer. Isolation transformer is generally used for machine repair, maintenance, protection, lightning protection, filtering, to avoid accidentally touching the charged body at the same time, the transformer is isolated from the original and secondary winding coil of the respective current. Isolation transformer for the early European countries used in the power industry, widely used in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment in the general circuit control power supply, security lighting and indicator lamps for the power supply of isolation transformers and ordinary transformer difference between ordinary transformers (including non-isolation transformer) is the primary task of changing the voltage is divided into step-down and step-up transformers, the original and secondary side of the coil is not equal to the number of turns. Isolation is not its main task, some transformers are not isolated on the original and secondary sides, such as autotransformers are typical. Isolation transformer's primary task is to isolate the original side winding for electrical insulation, so the most basic requirement is to ensure the original side insulation performance. And voltage is not its primary task, most of the isolation transformer does not voltage, that is, the original side winding turns are equal. For example, thyristor DC speed control system in order to prevent the main circuit high voltage invasion of pulse numerical control device and the use of pulse transformer is also typical.

Isolation Transformer Special Features:

① primary grounding, secondary not grounded; ② the first stage of the wire package between the isolation layer! This isolation layer is connected to the primary ground terminal, that is, the isolation layer is grounded. So the secondary side of the grid and static field are isolated! Because the secondary is not grounded, the output and ground does not constitute a circuit, when the human body single-ended contact with the output will not be electrocuted. And because of electrostatic isolation, in the secondary work to avoid electrostatic interference and electrostatic breakdown occurs! Isolation transformer is commonly known as safety transformer, it is generally used to isolate the impurities of the utility grid electricity and maintenance equipment and so on. The principle of isolation transformer is the same as that of ordinary transformer. Both utilize the principle of electromagnetic induction. An isolation transformer is generally a 1:1 transformer. Since the secondary is not connected to ground. There is no potential difference between any of the secondary wires and ground. The use of safety, commonly used as a maintenance power supply. Isolation transformer is not all 1:1 transformer, control transformers and tube equipment power supply is also an isolation transformer. Such as tube amplifier, tube radio and oscilloscope and lathe control transformer power supply are isolation transformer. For example, in order to safely repair color TV commonly used 1 to 1 away from the transformer. Because the secondary is not connected to ground. There is no potential difference between any of the secondary wires and ground.

The Role Of The Isolation Transformer

The main function of an isolation transformer is to completely insulate the primary side from the secondary side of the electricity and to isolate the circuit. In addition, the use of the core of the high-frequency loss characteristics, so as to inhibit high-frequency clutter into the control loop. Use isolation transformer to make the secondary ground suspension, can only be used in the power supply range is small, the line is shorter occasions. At this time, the system's capacitive current to ground is not small enough to cause personal injury. There is also a very important role is to protect personal safety and isolate dangerous voltages.
With the continuous development of the power system, the transformer as a key equipment in the power system plays an increasingly important role, its safe operation is directly related to the reliability of the entire power system operation. Transformer coil deformation refers to the coil in the force, the occurrence of axial, amplitude size change, body displacement, coil distortion and so on. Transformer coil deformation caused by two main reasons: one is the transformer operation is difficult to avoid external short circuit fault impact: two is the transformer in the transportation and lifting process of accidental collision. Isolation transformer refers to the input winding and output winding with electrical isolation of the transformer, isolation transformer to avoid accidentally touching the charged body at the same time, the isolation of the transformer is the isolation of the original and secondary winding coil of the respective current. Early for the European countries used in the power industry, widely used in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment in the general circuit control power supply, security lighting and indicator power.

Principle Of Isolation Transformer

The principle of an isolation transformer is the same as that of an ordinary transformer. Both utilize the principle of electromagnetic induction. An isolation transformer is generally a 1:1 transformer. Since the secondary is not connected to ground. There is no potential difference between any wire of the secondary and ground. Safe to use. Commonly used as a maintenance power supply.
Isolation transformers are not all 1:1 transformers. Control transformers and tube equipment power supply is also an isolation transformer. Such as tube amplifier, tube radio and oscilloscope and lathe control transformer power supply are isolation transformer. For example, in order to safely repair color TV commonly used 1 to 1 isolation transformer. Isolation transformer is used more, in the air conditioning is also used. General transformer original and secondary windings, although there is also the role of isolation circuit, but in the case of higher frequency, the capacitance between the two windings will still make the two sides of the circuit between the electrostatic interference. In order to avoid such interference, isolation transformer, the original and secondary windings are generally placed in different columns to reduce the capacitance between the two; also used the original and secondary windings placed concentrically, but in the windings between the addition of electrostatic shielding, in order to obtain a high degree of anti-interference. Electrostatic shielding is set up between the original and secondary windings of a non-closed copper or non-magnetic conductive paper, known as the shielding layer. Copper or non-magnetic conductive paper with wires connected to the shell. Sometimes in order to achieve better shielding effect, in the whole transformer, but also cover a shielding shell. The winding of the lead wire terminals are also shielded to prevent other external electromagnetic interference. This can make the original and secondary windings between the main only magnetic coupling, and the equivalent distribution capacitance between them can be less than 0.01pF, thus greatly reducing the original and secondary windings between the capacitance current, effectively inhibit the power supply as well as other circuits from a variety of interference.