Transformer Oil Test
In transformer testing, the Transformer oil test is done to check the health and performance of the transformer. In transformer, oil serves as multiple purpose such as insulation, cooling and arc suppression. Overtime the quality of the oil degrade due to various factors such as moisture, oxidation, and contamination, which leads to result in reducing the efficiency and reliability of the transformer.
The Following are the main purpose of Impulse Voltages Withstand Test
- To determine the dielectric strength of the oil, which is important for evaluating the insulation purposes of the transformer.
- To determine the Moisture content of the transformer as the Moisture is a common contaminant in transformer oil which can lead to degradation of the insulation of the transformer.
- To determine the acidity levels in transformer oil and assess its neutralization capacity.
- To determine the Insulation Degradation which can help to analyze the gases dissolve in oil which provides the insights into internal or potential issue in the Transformer.
Procedure of Transformer Oil Test
- Collect the sample of transformer oil using proper sampling techniques.
- Check all the testing equipment is clean and calibrated according to the testing Requirements.
- Set up the test cell with electrodes and place the oil sample between them.
- Apply increasing voltage to the oil sample until breakdown occurs, recording the voltage at breakdown.
- Determine the acidity level of the oil by measuring the amount of potassium hydroxide (KOH) required to neutralize acidic components.
- Analyze the test result to evaluate dielectric integrity and the oil condition of the transformer.
Transformer Testing
Transformer testing is a process of examining a transformer to determine its health i.e., whether it is working properly or not. On an electrical transformer, we can perform various types of tests to measure its performance and efficiency and to take corrective actions.
As we know, in electrical systems, an electrical transformer is one of the most important and commonly used electrical machines that perform voltage and current transformation. Thus, the primary function of an electrical transformer is to increase or decrease the value of voltage or current in an electrical or electronic circuit. To perform this voltage step-up or step-down operation, the transformer utilizes the phenomenon of electromagnetic induction.
To ensure the desirable and proper operation of a transformer, we perform a variety of tests on it such as winding resistance measurement, insulation resistance measurement, dielectric strength measurement, and more. The group of transformer tests is referred to by using an umbrella term, transformer testing. This article will explain the concept of transformer testing and different tests that are to be performed on a transformer daily, quarterly basis, and yearly basis. Let’s get started with the basic definition of transformer testing.
Table of Content
- Transformer Testing
- Types
- Type Test
- Routine Tests
- Special Tests
- Pre Commissioning Test