Special Tests of Transformer
Special tests of transformers are done under specific circumstances or when particular issues regarding the transformer’s performance, condition, or application. These tests are not be part of standard manufacturing or commissioning procedures but are carried out as needed to particular issues or to check the transformer’s continued safe operation.
In the special test it includes such as Partial Discharge Test which detects insulation defects or weaknesses in the transformed, Impulse Voltage Withstand Test to check the transformer’s ability to withstand high-voltage impulses, Frequency Response Analysis to detect mechanical defects or winding deformations in the transformer core and windings by checking their frequency response to a frequency signal.
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