How to detect potential faults in transformer production
Time：2024-12-19 Auther：ZTelec-www.ztelectransformer.com
Transformers are high-voltage capacity equipment that facilitates the transmission and distribution of electrical power. Its primary purpose is to step down voltage levels in a given power system. But despite being enclosed devices with no rotating parts, they are not entirely invulnerable to faults. Should these faults crop up, leaving them unchecked could lead to disastrous results by damaging the transformer and impeding daily operations.
To avoid this, one must first learn how to diagnose these faults.
How to detect potential faults in transformer production
Appearance check: Check the shell of the transformer for obvious damage, deformation or rust. At the same time, check whether the wiring terminals of the transformer are loose, detached, or burned.
Sound judgment: When the transformer is in normal operation, the sound emitted should be even and low. If you hear abnormal sounds from the transformer, such as sharp whistling, crackling, etc., it may mean that there is a fault inside the transformer.
Oil temperature detection: The high oil temperature of the transformer may be caused by internal failure. If the oil temperature of the transformer continues to rise and exceeds the normal range, you need to further check whether the transformer is faulty.
Insulation resistance measurement: Insulation resistance is an important index to reflect the insulation performance of the transformer. Use a measuring tool such as a megohm meter to measure the insulation resistance of the transformer. If the measurement result is lower than the normal range, it may mean that the insulation performance of the transformer has been damaged. Further check and handle.
Electrical test: A series of electrical tests, such as no-load test and short circuit test, can detect whether there is a fault in the transformer core and coil; The pressure-tight test can test whether the insulation performance of the transformer meets the requirements.
Oil quality analysis: By visually checking the transformer oil appearance, including color, transparency and whether there is suspended matter, preliminarily judge the oil status. Test transformer oil to detect moisture, gas, dissolved gas and solid particles and other indicators to assess whether the oil meets the requirements.
Infrared thermal image detection: The surface of transformer is scanned and detected by infrared thermal imager which can find abnormal temperature distribution. According to the anomaly in the infrared image, the possible fault location is determined.
Preventive maintenance
Regular inspection: According to the operation of the transformer and the manufacturer’s recommendations, develop a regular inspection plan to discover and deal with potential faults in time.
Data analysis: Collect and analyze the test data, establish the health file of the transformer and provide the basis for preventive maintenance.
Detecting potential faults in transformer production requires the comprehensive application of various methods and means. Through the above methods, potential faults can be found and dealt with in time to ensure the quality and operation safety of the transformer. At the same time, strengthening preventive maintenance is also an important measure to improve transformer reliability and extend service life.
