Dry type transformer cooling fan

Types of dry type transformer cooling fans

A dry type transformer cooling fan, also known as an air blast fan, is designed to improve the ventilation of dry type transformers. Such devices are usually powered by electricity, but some models may work with solar energy. Generally, there are two major types of dry type transformer cooling fans, namely axia-flow/propeller cooling fans and brushless DC blowers.

• Axia-flow/propeller cooling fans

  This type of dry transformer ventilating fan uses an electric motor to drive the fan blades and thereby propel air in the axial flow direction. Axial fans are easy to install and have a lightweight design. They can be mounted in any position according to different needs. However, their noise level and power consumption are relatively higher, which may lead to accelerated fan failure.

• Brushless DC blowers

  DC blowers use electric currents to stimulate the permanent magnetic fields of the stator windings. This makes the rotor rotate and enables the motor to drive the blower wheel to rotate. A large amount of air is thus pulled in from the surroundings to achieve the purpose of cooling. Brushless DC blowers are relatively compact in size and have the benefits of high power density and low power consumption. They are also durable and resistant to harsh environments. Moreover, their noise level is lower compared with axial fans. One downside, however, is that DC blowers usually need to be pre-designed for specific applications.

Specification & maintenance of dry type transformer cooling fans

Specification

• Operating Voltage:

  Operating voltage is the range of voltages that a transformer can operate normally without being damaged. Dry-type transformer cooling fans usually have specific voltage requirements that need to be matched to the transformers' operating voltages to function properly. This may involve using fans designed for specific voltage levels or selecting cooling devices that can operate within a certain voltage range.

• Power:

  Dry-type transformer cooling fans are designed to cool dry-type transformers, which are used in electricity distribution and conversion. The power of a fan refers to the amount of electrical power it consumes. Selecting a fan whose power is appropriate for the dry-type transformer ensures effective cooling and helps prevent overheating during operation.

• Air volume:

  The air volume represents the amount of air the fan moves per unit of time, usually measured in cubic feet per minute (CFM). A larger dry transformer with higher capacity may require a cooling fan with a higher airflow to effectively dissipate heat generated during operation.

Maintenance

• Cleaning:

  Dry type fans should be cleaned frequently to get rid of dust, dirt, and other debris that may get on the blades and housing. The performance of the cooling fan will not be affected if it is cleaned. In addition, using a brush or compressed air to clean the interior of the fan can prevent the fan from being damaged by excess moisture during the process of cleaning with a wet cloth.

• Inspections:

  Dry type transformer cooling fans should be inspected on a regular basis to make sure there are no signs of damage, such as loose blades, cracks, or breaks. Replace the fan or repair it if any component is found to be damaged to ensure the normal operation of the transformer.

• Lubrication:

  The bearing of the cooling fan requires regular lubrication to ensure smooth operation and reduce frictional wear. For fans with permanent lubrication bearings, the user does not have to perform additional lubrication. However, for fans with conventional bearings, users need to add lubricant periodically as per the manufacturer's recommendations.

Application scenarios of dry-type transformer cooling fans

• Power plants

  In hydropower/thermal power/nuclear power plants, big fans are often installed on the transformers. They are used to ensure the stable operation of transformers inside the power plant. An ample supply of power is provided for the whole society.

• Substations

  In electric power substations, cooling fans of transformers are also crucial. They help keep the equipment working well so that the substations can transform and distribute electric power efficiently, which ensures that the flow of electric power between different areas will not be cut off.

• Industrial factories

  Many industrial factories use dry-type transformers. They are employed to change the voltage of electric power. A dry-type transformer cooling fan is applied to cool transformers, thereby prolonging their service lives and ensuring a stable supply of power for production lines.

• Buildings

  In a big building or a complex, dry-type transformers are often used as power supply equipment. Dry-type transformer cooling fans are applied to ensure the steady functioning of these transformers. They provide a reliable power supply for the entire building.

• Food production factories

  In food production, the equipment needs to be kept at a suitable operating temperature to ensure the food is safe and meet the relevant standards. Dry-type transformers can withstand dust and humidity are preferred for food production. A dry-type transformer cooling fan is applied to maintain transformers' working temperature and ensure the stable operation of the transformers to provide a steady power supply for food production lines.

How to Choose Dry Type Transformer Cooling Fans

When purchasing dry type transformer cooling fans for resale, buyers should consider some factors to ensure they get fans that will meet the needs of their customers.

• Property of air flow:

  Retailers should get fans whose airflow properties correspond with the transformer's required airflow. The dry type transformers cooling fans should provide enough airflow for heat dissipation. Additionally, the airflow direction of the fan should be compatible with the ventilation design of the equipment it's being used to cool.

• Noise level:

  Some factors can lead to a dry type transformer making a louder noise, like its location, the job it's doing, and the equipment it's cooling. As a result, the intended application's noise level requirement can differ. Buyers should get fans with an operational noise level that corresponds with the customers' desired specifications. In this case, cooling preferences want a quiet operation.

• Environment rating:

  Depending on the location of the dry transformer, the environment can be demanding, such as exposure to high levels of moisture or dust. In this case, retailers should choose a cooling fan with applicable environmental standards. For example, a rating standard like IP (Ingress Protection) ensures that the fan is adequately sealed and protected against environmental hazards.

• Power supply compatibility:

  Dry type transformer fans can run on many transformers ranging from AC to DC. When buying for resale, retailers should ensure that the fan's power requirements are compatible with the customer's usual power sources.

• Design and size:

  Buyers should consider the design and size of the coolers they are purchasing. They should ensure that the fans' dimensions and designs correspond to the transformer's available mounting provisions.

• Durability and reliability:

  Durability and reliability are important for customers who wish to minimize the frequent need for maintenance and replacement of cooling fans. Therefore, when purchasing dry type transformer cooling fans for resale, buyers should opt for fans that are renowned for their long-lasting and reliable service. Additionally, they should get fans that have replaceable and cleanable filters.

Q&A

Q1: What is the difference between active and passive cooling of a dry-type transformer fan?

A1: Active cooling relies on mechanical aids like fans or blowers, while passive cooling depends on natural airflow and heat rising without manufactured assistance.

Q2: Why is it important to cool a dry transformer?

A2: Maintaining operational efficiency and preventing potential detrimental overheating consequences is imperative. Optimal cooling sustains function and averts damage.

Q3: How does a cooling fan dry type transformer function in hotter climates?

A3: It becomes vital for dispersing heat swiftly to avert overheating, ensuring the transformer's integrity and continuous operation in elevated temperatures.

Q4: Can the absence of a cooling fan dry type transformer affect its performance?

A4: Yes, the absence can lead to overheating risks, reducing efficiency, potential damage, and shortened lifespan.