Short Circuit Withstand Test
In transformer testing, there is a test which is used to determine the ability of the transformer to withstand the thermal and mechanical stresses which are caused due to short-circuit faults in the electrical system. The primary purpose of the short-circuit test is to evaluate the mechanical strength and safety of the transformer under abnormal conditions. This test is generally performed during manufacturing and testing of the transformer.
The following are the main purposes of the short-circuit withstand test:
- To determine mechanical strength of different components of the transformer under short-circuit fault condition.
- To determine the heat dissipation ability of transformer during short-circuit fault.
- To determine the weakness or deficiencies in the transformer’s design or Construction.
- To determine the safe operation of transformer under adverse circumstances.
Procedure of Short Circuit Withstand Test
- Ensure the the all connections in the Primary and Secondary winding Sides are Properly Configured and Connected.
- Connect he High Current Source such as Short-Circuit generator or Specialized Short Circuit testing Device to the Primary winding.
- Apply the Short Circuit current to the Transformer’s Primary Side for the require duration and monitor the Current waveform and magnitude Through out the test.
- Analyze the Observed data to Evaluate the Transformer’s Performance during the Test.
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