What is an isolation transformer and what is an isolation transformer used for? Why quarantine?

The isolation transformer is a safety power supply, which is generally used for machine repair and maintenance, and plays the role of protection, lightning protection and filtering.

The principle of an isolation transformer is the same as that of an ordinary transformer. All use the principle of electromagnetic induction. Isolation transformers generally (but not all) refer to 1:

1 transformer. Since the secondary is not connected to the earth. There is no potential difference between any of the secondary wires and the earth, and it is safe to use.

It is often used as a maintenance power supply.

The power supply that controls transformers and tube equipment is also an isolation transformer. Power sources such as tube amplifiers, tube radios and oscilloscopes, as well as lathe control transformers are isolation transformers. For example, in order to safely repair color TVs, commonly used 1:

1 of the off-transformer. It is also used in air conditioners.

First of all, the AC power supply voltage we use is usually connected to the ground by one wire, and there is a potential difference of 220V between the other wire and the earth. Human contact can produce electric shock. The secondary stage of the isolation transformer is not connected to the earth, and there is no potential difference between any two of its wires and the earth.

People will not be electrocuted if they touch any of the wires, so it is safer.

Secondly, the output and input of the isolation transformer are completely "open" and isolated, which effectively plays a good filtering role on the input end of the transformer (the power supply voltage supplied by the power grid). This provides a pure power supply voltage to the electrical equipment.

Another use is anti-interference. It can be widely used in subways, high-rise buildings, airports, stations, docks, industrial and mining enterprises and tunnel transmission and distribution places.

Isolation transformer refers to the input winding and output winding are electrically isolated from each other transformer, in order to avoid the danger caused by accidentally touching the live body (or the metal parts that may be charged due to insulation damage) and the earth, its principle is the same as that of ordinary dry-type transformer, and it is also the use of electromagnetic induction principle, mainly isolating the primary power supply circuit, and the secondary circuit is floating on the ground to ensure the safety of electricity.

Isolation transformer: A transformer with electrically isolated input and output windings.

Why should isolation transformers be used in circuit maintenance and operation? Here's why!

The isolation transformer refers to the transformer in which the input winding and the output winding are electrically isolated, and the isolation transformer is used to avoid accidentally touching the live body at the same time The isolation of the transformer is to isolate the current of the primary and secondary winding coils. In the early days, it was used in the power industry in European countries, and was widely used in the electronic industry or industrial and mining enterprises, machine tools and mechanical equipment in the general circuit control power supply, safety lighting and indicator light supply.

A machine that isolates things and then transforms pressure.

Isolation transformer generally refers to the voltage of 1:1 transformer, the voltage on both sides of the transformer is the same, the transformer does not have the effect of transforming, only the magnetic connection in the circuit has no direct connection of electricity, and plays an isolation role. The application occasions of high-voltage isolation transformers are different, and the functions are also different;

1. Anti-interference effect: for example, after passing the isolation transformer of Y-wiring, it can prevent the transmission of some harmonics;

2. Impedance transformation: increase the impedance of the system, so that the protection device is easy to match;

3. The function of stabilizing the system voltage: such as reducing the impact on the system voltage when starting the large-load equipment;

4. The function of preventing system grounding: when single-phase grounding occurs on the load side of the isolation transformer, it will not cause the whole system (the part above the isolation transformer) to be single-phase grounded;

5. Reduce short-circuit current: when a short-circuit accident occurs on the load side, limit the short-circuit current of the system;

The principle of an isolation transformer is the same as that of an ordinary transformer. All use the principle of electromagnetic induction. Isolation transformers generally refer to 1:

1 transformer. Secondary discord is connected. There is no potential difference between any of the secondary wires.

Safe to use. It is often used as a maintenance power supply. However, isolation transformers are not all 1:

1 transformer. Control transformers and power supplies for tube equipment are also isolation transformers. Power sources such as tube amplifiers, tube radios and oscilloscopes and lathe control transformers are isolation transformers.

Three-phase isolation transformer.

1. The main tasks are different

The main task of ordinary transformers is to change the voltage, which is divided into step-down transformers and step-up transformers, and the number of turns of the primary and secondary coils is unequal. The isolation transformer is not the main task of ordinary transformers, and some transformers are not isolated on the primary and secondary sides, such as autotransformers.

2. Different definitions:

An isolation transformer means that the primary and secondary coils are separated from each other on the DC circuit. Ordinary transformer refers to the transformer used in machine tools and equipment control lines, which generally changes high voltage to low voltage.

3. Different usages:

The isolation transformer is mainly to isolate the power supply and the load, so that there is no direct electrical connection between the two sides. It is generally used in low-voltage instruments and experiments. Ordinary transformers are controlled within a required range of use according to the voltage and current required by electrical equipment.

Classification: 1. According to the number of phases:

1) Single-phase transformer: used for single-phase load and three-phase transformer set.

2) Three-phase transformer: used for the rise and fall voltage of the three-phase system.

2. According to the cooling method:

1) Dry-type transformer: relying on air convection for natural cooling or increasing fan cooling, mostly used in high-rise buildings, high-speed toll stations and local lighting, electronic circuits and other small-capacity transformers.

2) Oil-immersed transformer: relying on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling, forced oil circulation, etc.

How it works. The transformer is composed of an iron core (or magnetic core) and a coil, the coil has two or more windings, of which the winding connected to the power supply is called the primary coil, and the rest of the windings are called secondary coils. It can transform AC voltage, current, and impedance.

A transformer is a stationary electrical appliance made using the principle of electromagnetic induction. When the original coil of the transformer is connected to the AC power supply, the alternating magnetic flux is generated in the core, and the alternating magnetic flux is universally expressed.