Impulse Voltage Withstand Test
In transformer testing, the Impulse voltage withstand test is done on the transformer for Critical evaluation, It is used to check their ability to withstand Transient Voltage surges or impulses. These Impulses can occur due to multiple factor such as lightning strikes, Switching operations, or other transient disturbances in the electrical network. This test is basically done to check Equipment’s Insulation can withstand Such high Voltage Surges Without breakdown or failure.
The Following are the main purpose of Impulse Voltages Withstand Test:
- To determine the ability of the insulation system of the transformer to withstand high voltage impulses such as lighting strikes or other impulse surge factors.
- To determine integrity of the Transformer by subjecting them to Extreme Transient Voltage conditions.
- To determine the Reliability and durability of the insulation material and components used in the transformer.
- To determine the Quality Assurance in the Transformer to ensure that it meets Specific Performance Standards and Requirements.
Procedure of Impulse Voltage Withstand Test
- Ensure all the Connection are Secured and the test setup is free from any defects or damages.
- Setup up impulse Voltage generator According to the Test requirements, Then configure the test parameters including peak voltages level ,waveform shape, polarity and repetition rate based on the test requirements.
- Connect the Suitable measuring instruments such as oscilloscopes, voltages dividers and other measuring devices to monitor and measure the response of the equipment under test.
- Apply the impulse voltage Waveform using the impulse voltage generator, gradually increase the voltage level and monitor the equipments response to the Applied response.
- Analyze the recorded data from the measuring instruments to asses the transformers performance.
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