"Ten Methods" for Transformer Fault Diagnosis
Release time:
2024-10-28
When a dry-type transformer fails, scientific methods are required for troubleshooting. Start with the fault phenomenon to find out whether the transformer has abnormal phenomena such as cracks, noise, odor, overheating, etc. Then use scientific instruments to detect, analyze and judge, and comprehensively use other fault diagnosis methods and techniques to achieve effective diagnosis and resolution.
When a dry-type transformer fails, scientific methods are required for troubleshooting.
Start with the fault phenomenon to find out whether the transformer has abnormal phenomena such as cracks, noise, odor, overheating, etc. Then use scientific instruments to detect, analyze and judge, and comprehensively use other fault diagnosis methods and techniques to achieve effective diagnosis and resolution.
Here are the following "ten methods" for your reference, which can not only be used for transformer fault diagnosis, but also for all electrical equipment:
Ask the relevant operators or maintenance personnel about the phenomena before the fault occurs, such as no overload, abnormal noise, sparks, etc., to understand the general situation.
Observe: Check the external conditions and operation of the on-site equipment, check the circuit diagram and related information, and conduct comparative analysis.
Listen: Listen to the sound of the equipment in operation, the sound of the relay closure, the howling sound of the inductor, transformer, and contactor.
Smell: In the case of overheating, short circuit, etc., a burnt smell may be produced.
Touch with your hands: Under the condition of ensuring safety, touch the key parts of the equipment with your hands, and judge the fault according to the temperature, looseness of components and vibration.
Disconnect: gradually disconnect part of the circuit, narrow the scope of the fault and determine the fault point.
Short-circuit: short-circuit the switch signal or part of the circuit, narrow the scope of the fault and determine the fault point.
Restart: turn off the power of the equipment, then restart it, and sometimes the fault alarm disappears.
Replacement: Use substitute parts for replacement test to see if the fault disappears.
Detection: Use instruments to detect electrical equipment, compare parameters with normal data, and analyze the cause of the fault.
In these ten methods, we narrow the scope by the way of easy first and difficult second, dynamic first and static second, power first and load second, human first and system second, external first and internal second. It can effectively reduce unnecessary disassembly and testing, and ensure that each circuit board, component and cable connection point is in a reliable connection state. How about it, have you learned it?
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