Overview of Low Voltage Transformers

Low voltage transformers are critical power equipment that uses the axiom of electromagnetic induction to convert AC voltage, including voltage, current, impedance conversion, isolation, and stability functions. It usually consists of three parts: primary coil, secondary coil, and iron core (or magnetic core). Low-voltage transformers are widely used in power systems for voltage regulation, impedance matching, and safety isolation. It is also commonly used in various electronic devices and circuits, such as audio devices, TV receivers, computer power supplies, etc., to achieve functions such as voltage, current, and impedance conversion. In addition, low-voltage transformers also play an essential role in safety, preventing excessive recent or circuit failures from posing a threat to equipment or personal safety and protecting equipment from harmful effects such as sudden power changes and surge currnts.

Characteristics of Low Voltage Transformers:

1.Small size, low power, easy installation, suitable for low-power equipment and short distance power transmission.

2.Not using oil as an insulation medium is more environmentally friendly.

3.Has excellent moisture and corrosion resistance, suitable for harsh working environments.

4.Strong isolation, with high safety and reliability.

5.No need for oil inspection, filling, and replacement, reducing maintenance costs and workload.

6.Low magnetization current, low noise, low temperature rise, stable performance and high efficiency.

Classification of Low Voltage Transformers

1.According to the function and purpose of transformers, they can be divided into control transformers, power transformers, isolation transformers, autotransformers, etc.

2.According to the voltage level of transformers, they can be divided into low-voltage transformers and high-voltage transformers.

3.According to the cooling method of transformers, they can be divided into oil immersed transformers and dry-type transformers.

Application of Low Voltage Transformers

1.Power system:Low voltage transformers are an indispensable part of the power system. It is mainly used for transforming and distributing voltage, reducing the voltage of high-voltage transmission lines to the voltage required by the user's electrical equipment. In addition, low-voltage transformers are also used to provide end users with electrical energy for rotating machinery, such as fans, water pumps, compressors, etc.

(Applied in the power system)

2.Energy industry:In the energy industry, low-voltage transformers are commonly used to reduce the current transmitted by high-voltage transmission lines in the power grid. These transformers can convert high voltage currents into low voltage currents, making them suitable for use in factories and homes. In addition, low-voltage transformers are also used in power conversion and distribution systems in the power grid.

(Applied in the energy industry)

3.Electronic devices:Low voltage transformers also play an important role in various electronic devices and circuits. For example, in audio equipment, television receivers, computer power supplies, etc., low-voltage transformers are used to achieve functions such as voltage conversion, current conversion, and impedance conversion.

(Applied to electronic devices)

4.Security protection:Low voltage transformers can also be used as a safety device to protect equipment from harmful effects such as power supply mutations and surge currents, while also preventing threats to equipment or personal safety caused by excessive current or circuit failures.

(Applied in security protection)

Company Profile

Tongrun Optoelectronics (sales@pddn.com)produces high and low voltage supporting products such as low-voltage transformers. Various voltages and capacities can be customized according to customer parameter requirements.

Since its establishment, the company has always been guided by technology, backed by solid technology, actively introducing advanced foreign technologies, and continuously improving and perfecting products. After years of professional management, our products have sold well nationwide. Our products are exported to more than 30 countries including North America, Central and South America, Oceania, Southeast Asia, West Asia, Africa, and Europe.

Welcome to visit, inspect, and negotiate business.

Payment Methods of Low Voltage Transformers

L/C, T/T, Western Union, Paypal, Credit Card etc.

Shipment of Low Voltage Transformers

By sea, by air, by express, as customers request.

Storage Conditions for the Low Voltage Transformers

1.Transformers should be placed in a dry and well ventilated location, away from direct sunlight and humid environments.

2.Transformers should not be stored mixed with acids, alkalis, batteries, chemicals, or gases harmful to insulation.

3.Oil immersed transformers should be isolated or kept away from ignition sources and sparks, and fire protection facilities should be strengthened to ensure safety.

4.The oil in the transformer oil cooler and oil pump should be completely drained, and all inlet and outlet ports of the oil cooler and oil pump, as well as the holes on the radiator, should be plugged with plugs.

FAQ

Q1

What is the working principle of a dry-type transformer?

Re: The working principle of a dry-type transformer is to use the principle of electromagnetic induction to evacuate electrical energy from the primary side to the secondary side through magnetic field coupling between the primary and secondary coils. When an AC voltage is applied to the primary side of a transformer, the current flows through the primary coil, generating alternating magnetic flux in the iron core. This magnetic flux not only passes through the air gap separating the primary and secondary coils but also passes through the iron core at the same time. Under the action of magnetic flux, an induced electromotive force is yielded in the secondary coil, resulting in an induced current flowing through it. Due to the action of the iron core, this magnetic flux only closes one circuit, which is called a magnetic circuit.

Q2

How do you choose the appropriate dry type transformer?

Re:Choosing a suitable dry-type transformer requires considering the following factors:

Rated capacity: Select the appropriate rated capacity according to actual needs.

Rated voltage: Select the appropriate rated voltage based on the voltage level of the power supply system.

Rated current: Calculate the rated current based on the rated capacity and potential of the transformer.

Short circuit impedance: Short circuit impedance reflects the impedance of a transformer under short circuit current and has a significant impact on the operational stability of the transformer.

Connection group: Select the appropriate connection group according to actual needs.

Other factors, such as installation environment and maintenance convenience, also need to be considered.

Q3

What is the main difference between dry-type transformers and oil-immersed transformers?

Re:The main difference between dry-type transformers and oil-immersed transformers lies in their different cooling methods and insulation media. Dry-type transformers use air as the coolant medium, while oil-immersed transformers use transformer oil as the cooling and insulation medium. In addition, dry-type transformers are generally installed in indoor or outdoor open substations, while oil-immersed transformers are usually installed in indoor or outdoor enclosed substations.

Q4

What issues should be noted when using a dry-type transformer?

Re:When using dry-type transformers, the following points should be noted:

Keep a dry environment: Dry transformers are sensitive to moisture and moisture, so they should be kept in a dry climate to avoid the intrusion of moisture.

Regular maintenance and inspection: Regularly inspect and maintain transformers to ensure their regular operation.

Pay attention to overload situation: Avoid long-term overload operations to avoid damage to the transformer.

Pay attention to safety distance: Keep a safe distance from the transformer to avoid accidents such as electric shock.

Q5

What should be noted in the maintenance and upkeep of the dry type transformer?

Re:When maintaining and servicing dry-type transformers, attention should be paid to the following points:

Regular cleaning: Regularly clean the dust and debris on the transformer to maintain cleanliness.

Check fasteners: Check if the fasteners of the transformer are loose. If any looseness is found, tighten them in a timely manner.

Check insulation resistance: Regularly measure the insulation resistance of the transformer to ensure it meets relevant standard requirements.

Check for abnormal sounds and odors: If any strange sounds or odors are found, they should be checked and dealt with promptly.