Transformer testing is done for confirming the specifications and performance of an electrical power transformer. The transformer is the main part of an electrical distribution system so if it is not working properly then it will affect the distribution system. So it has to go through numerous testing procedures such as :
Transformer insulation resistance deterioration is one of the most common causes of transformer failure.A failing transformer is a costly replacement in an electrical system with the potential for a long downtime. If you fail to maintain your transformer with regular insulation resistance testing then it’s likely to fail before reaching its maximum operating life.
The magnetic balance test is a most commonly used proactive test performed only on three-phase transformers to detect the faults in the core and to verify the imbalance in the magnetic circuit and also to identify inter-turn faults in the transformer at the early stage of manufacturing work. If you fail to maintain your transformer with regular magnetic balance test then it’s likely to fail before reaching its maximum operating life.
This test is performed to locate defects in the magnetic core structure, shifting of windings, failure in between turn insulation or problem in tap changers. These conditions change the effective reluctance of the magnetic circuit, thus affecting the current required to establish flux in the core.
The measurement of winding resistance is useful in detecting a number of types of fault in a transformer. Measuring the resistance of the windings assures that the connections are correct and the resistance measurements indicate that there are no severe mismatches or opens.
The vector group of transformer is an essential property for successful parallel operation of transformers. Hence every electrical power transformer must undergo through vector group test of transformer at factory site for ensuring the customer specified vector group of transformer.
The performance of a transformer largely depends upon perfection of specific turns or voltage ratio of transformer. So transformer ratio test is an essential type test of transformer.
BDV testing is done to test break down voltage of transformer oil and also it is done for checking the dielectric strength of the oil of the Transformer. If you fail to maintain your transformer with BDV testing then it’s likely to fail before reaching its maximum operating life.
Tan Delta, also called Loss Angle or Dielectric Dissipation Factor (DDF) or Power Factor (PF) testing, is an electrical dielectric test on the insulating oil used to determine its quality. The test is performed at two temperatures. Information from each test and the results considered together may form the basis for making a judgment on whether it’s suitable for a transformer to continue in service and for determining when the replacement or regeneration of the transformer oil is needed.
Transformer oil tends to degrade over time. The oil is exposed to undesirable materials like acids, metal dust, moisture etc. When transformers contain dissolved gases, dust, and other contaminants, it is time to take action for the oil to be filtered and purified.
Electrical transformers are an expensive and important part of any machinery. So for getting optimal performance and increased product life, it is best to conduct regular maintenance checkups on your machinery. We provide service and maintainance of all types of transformers.
We hold expertise in meeting the attending to the demands of on line oil leakage in electrical equipment like oil transformers. We provide Oil Leakage Attending Work service of all types of transformers.
We do Installation ,Testing and Commissioning of every type of transformer according to its specifications.
The primary purpose of transformer maintenance is to ensure the internal and external parts of the transformer. For that we provide various services and maintainance of all sizes of Transformers.
Overhauling of a transformer is normally undertaken either if it is faulty (internal) or at the end of 10 - 12 years of its service by way of periodic maintenance. It is advisable to review and analyze the periodical DGA values to check any abnormal variation and healthiness of the transformer.
