Do You Know A Few Of The Causes Of Transformer Failure
(1) Circuit failure
The circuit fault of the transformer mainly refers to the short circuit at the outlet of the transformer, the short circuit between the lead wires or the winding to the ground inside the transformer, and the occurrence of the fault due to the short circuit between the phases. In fact, this type of fault is a very common problem among many fault problems of actual power transformers, and there are many actual cases of such faults. For the short-circuit of the transformer at the low-voltage outlet, in order to solve the problem, the windings are generally replaced at the fault location. When the fault is serious, all windings may need to be replaced as necessary, so as to reduce the probability of the fault as much as possible and greatly reduce the cause. The serious economic and personal and property losses caused by power failures, therefore, it is necessary to pay great attention to this. [4]
(2) Winding failure
The winding faults can be divided into the following types in detail: the joints are extremely prone to cracking, phase-to-phase short-circuit problems, turn-to-turn short-circuits, winding ground faults, etc. Analyzing and summarizing the reasons for the above faults can be summarized: the insulation of the transformer has problems; sundries in the windings, aging insulators; insufficient working strength of the transformer; problems with the windings due to deformation: the windings are affected by water vapor; the temperature of the transformer high. [4]
(3) Transformer oil seepage fault
Transformer oil leakage fault is the most common fault in the entire power transformer fault. Transformer oil leakage failure can be explained as the power transformer oil leakage will cause some subsequent problems, such as serious environmental pollution to the air itself, and may also cause a lot of waste of resources, which will greatly increase the operating cost of the enterprise, thereby increasing The economic pressure and market resistance of enterprises. As a hidden safety hazard, this problem will 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 the failure will also have an impact on the service quality of power companies, and will have a major negative impact on the provision of safe and scientific services to customers who use electricity. [4]
(4) The temperature at the joint and how high is the fault
The temperature at the joint and how high the fault joint refers to the current-carrying joint of the transformer. Throughout the design of the transformer, the current-carrying joints of the transformer have always assumed extremely important responsibilities. The analysis and summary of the electrical accident can be concluded: the unstable connection of the current-carrying joints of the transformer causes the temperature at the joints to rise rapidly, even exceeding The ignition point of the joint is caused, which causes the joint to burn out, which seriously affects the safe and stable operation of the power transformer. These problems have sounded the alarm for electric power companies to work on safe power supply in the future. In order to effectively reduce the occurrence of such safety accidents and avoid safe electricity accidents caused by excessively high temperature at the joints, it is necessary for electric power inspection and maintenance workers to pay attention to the temperature changes of the current-carrying joints of the transformer during the usual inspection and maintenance work. The temperature of the joint changes within the normal value range, so as to effectively ensure the safe and stable operation of the power transformer.
