Pre Commissioning Test of Transformer
Pre Commissioning test are done before connecting the transformer to the electrical system. These Tests are done to check the transformer is installed correctly and its in good working conditions that meets with the required standards and specifications. These test includes Visual Inspection to visually inspect the transformer, Polarity Check to verify the correct polarity of the transformer windings and connections, Insulation Resistance Test to measure the insulation resistance between various parts of the transformer, Winding Resistance Test to measure the resistance of transformer windings to ensure they match design specifications and estimate copper losses, Turns Ratio Test to verify the turns ratio of the transformer and ensure the correct voltage transformation.
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