Quality standards of product

 

  
1.Quality management system GB/T 19001-2016 ISO 9001: 2015

The operation of the whole ZHENGRUI system is strictly controlled and managed. This ensures the quality of products and material in all stages, from receiving customer requests to design, materials, production, installation, testing, packaging, delivery, after-sales, all of which operate under strict and logically linked processes.

2.Accreditation certificate CE

LOW VOLTAGE DIRECTIVE,ELECTROMAGNETIC COMPATIBILITY DIRECTIVE ATTESTATION OF CONFORMITY
GENERAL PRODUCT SAFETY REGULATION ATTESTATION OF CONFORMITY

confirms that ZHENGRUI technical quality meets the requirements of all specific international standards for testing and calibration laboratories. All ZHENGRUI products are fully tested in a qualified testing room before leaving the factory, ensuring stable quality and providing absolute peace of mind for customers.

Products Description

An oil-immersed transformer is a type of electrical transformer in which the internal components, including the core and windings, are immersed in oil. The oil serves as both an insulating medium and a cooling agent, helping to maintain the transformer’s stability, protect its components, and prevent overheating. Oil-immersed transformers are widely used in power distribution systems for various voltage levels and applications.

Key Features:

  1. Working Principle: An oil-immersed transformer operates on the principle of electromagnetic induction, where electrical energy is converted from one voltage level to another. The core is made of high-quality magnetic material, and the windings are typically made of copper or aluminum. The entire internal structure is immersed in transformer oil, which acts as both insulation and cooling.

  2. Oil as Insulation and Cooling Medium: The transformer oil insulates the internal electrical components and prevents electrical breakdown. It also absorbs and dissipates the heat generated during operation, ensuring that the transformer stays within a safe temperature range.

  3. Sealed Structure: Oil-immersed transformers usually feature a sealed tank that prevents moisture or air from contaminating the oil. This helps maintain the insulating properties of the oil and prevents oxidation or degradation.

  4. Oil Level Monitoring: These transformers are typically equipped with an oil-level indicator, making it easier to check the oil level and ensure that it is within the recommended range. Oil temperature indicators are also common to monitor the operational temperature.

     

Advantages  and disadvantages 
 Advantages:
  • High Reliability: Oil-immersed transformers are known for their high reliability, making them ideal for use in high-power applications where stable and continuous operation is essential.
  • Good Heat Dissipation: The oil effectively absorbs and carries away the heat generated by the transformer during its operation, allowing it to operate at high loads without overheating.
  • Simple Structure and Easy Maintenance: These transformers have a relatively simple construction, making them easier to maintain. Regular checks of oil level and oil quality are sufficient for ensuring safe operation.
  • Cost-Effective: Oil-immersed transformers are generally less expensive than other types of transformers, such as gas-insulated transformers, making them a cost-effective option for power distribution.
  • Wide Application Range: Oil-immersed transformers are suitable for various applications, including power transmission and distribution, industrial plants, commercial buildings, and renewable energy systems (like wind and solar power plants).
Disadvantages:
  • Risk of Oil Leakage: If the transformer tank is damaged or the seals are compromised, there is a risk of oil leakage. This could lead to safety hazards, such as fire or environmental pollution, so regular inspections are necessary.
  • Larger Size: Compared to gas-insulated transformers, oil-immersed transformers are typically larger in size and weight, requiring more space for installation.
  • Environmental Concerns: Transformer oil, especially mineral oil, can pose environmental risks if spilled or improperly disposed of. Efforts must be made to ensure proper disposal and recycling of the oil.
  • Cooling Time: While oil-immersed transformers offer good cooling, during periods of high load, they may require more time to dissipate the heat and return to normal operating temperatures.