What Are The Causes Of Transformer Faults

(1) Circuit fault
The circuit fault problem of transformers mainly refers to the occurrence of short circuits at the outlet of the transformer, as well as short circuits to ground between leads or windings inside the transformer, and the occurrence of faults caused by short circuits between phases. In fact, this type of fault is a very common problem among many actual fault problems of power transformers, and there are also many actual cases of this fault. For the problem of transformer short circuit at the low-voltage outlet, in order to solve this problem, it is generally necessary to replace the winding at the fault location. When the fault is severe, it may be necessary to replace all the windings as much as possible to reduce the probability of fault occurrence and greatly reduce the serious economic and personal property losses caused by power faults. Therefore, it is necessary to pay great attention to this.
(2) Winding fault issues
Winding faults can be divided into the following types in detail: welding joints are extremely prone to cracking, phase to phase short circuits, turn to turn short circuits, winding grounding faults, etc. The analysis and summary of the reasons for the above faults can be summarized as follows: there is a problem with the insulation of the transformer; There are debris entering the winding and aging insulators; The working force of the transformer is insufficient; Winding problems caused by deformation: the winding is affected by water vapor; The temperature of the transformer is high.
(3) Transformer oil leakage fault
Transformer oil leakage fault is the most common fault in the entire power transformer. Transformer oil leakage fault can also be explained as the subsequent problems caused by power transformer oil leakage, such as serious environmental pollution to the air and potential resource waste. This will greatly increase the operating costs of enterprises, thereby increasing economic pressure and market resistance. As a safety hazard, this issue can greatly affect the safe and stable operation of power transformers, and in severe cases, it may cause the inability of machinery and equipment to operate. It should also be noted that this fault will also have an impact on the service quality of power enterprises, and have a significant negative impact on providing safe and scientific services for electricity customers.
(4) Temperature and high fault at the joint
The temperature and high fault at the joint refer to the current carrying joint of the transformer. In the design of the entire transformer, the current carrying joint of the transformer has always taken on extremely important responsibilities. Analyzing and summarizing power accidents, it can be concluded that the unstable connection of the current carrying joint of the transformer causes the temperature at the joint to rapidly increase, even exceeding the ignition point of the joint, leading to the phenomenon of joint burning, seriously affecting the safe and stable operation of the power transformer. These issues have sounded the alarm for power companies to ensure safe power supply in the future. In order to effectively reduce the occurrence of such safety accidents and avoid safety electricity accidents caused by high temperature at the joints, it is necessary for power inspection and maintenance workers to pay attention to observing the temperature changes of the current carrying joints of the transformer in their daily inspection and maintenance work, ensuring that the temperature of the joints changes within the normal numerical range, in order to effectively ensure the safe and stable operation of the power transformer.