source:Industry News Popular:adapter release time:2021-03-15 14:38:54 Article author:sznbone
With the transformation of rural power grids and the continuous improvement of power quality, the transformer factory said that at present, the power supply voltage of the power grid, especially the head end of the distribution transformer, generally exceeds 400V, and some are as high as 420V. The low-voltage reactive power compensation device cabinets are all installed on the bus side of the low-voltage line of the distribution transformer, at the forefront of the power supply. At this time, the capacitor runs at a voltage higher than its rated voltage for a long time, shortening the life.
Two or more tap changes are not allowed on one transformer. When the main transformer is overloaded, the on-load tap change operation is not allowed. After the on-load tap-changer has been operated for 6-12 months or 2000-4000 times of switching, oil samples should be taken for testing. After 1-2 years of operation or 5000 times of switching, the on-load tap-changer box should be replaced After switching 5000-10000 times, the tap changer should be checked for lifting core.
Shell-type transformer: Its structural feature is that the iron core surrounds the windings. Small transformers in electronic equipment generally use this structure. The transformer of this structure has high mechanical strength, and the core heat dissipation is relatively easy.
There are other classification methods. For example, according to the number of windings, there are two-winding transformers, three-winding transformers, etc.; according to the cooling method, there are dry-type transformers and oil-immersed transformers. Oil-immersed transformers can be further divided into oil-immersed self-cooling, Oil-immersed air-cooled, oil-immersed water-cooled, forced oil circulation air-cooled or water-cooled. Although there are many types of transformers, the basic physical processes of various transformers and the basic methods of analyzing the performance of transformers are generally the same.
The perfect basic work can guarantee the safe realization of system functions. In order for the transformer factory to fully guarantee the accurate performance of the power automation system functions, improve the accurate and fast positioning and troubleshooting capabilities of the power distribution management for network failures, and promote the safe deployment of emergency power transmission, it is necessary to accurately implement the FA function of the mechanical device Installed in the power automation system, this helps to improve the system's ability to identify the location of the fault, and timely implement alarms, isolate the fault point and activate the power activity function, so as to ensure the real-time application of the automation system functions. There are mainly three types of faults in the process of power distribution management: single and double contact failures, three-point phase contact line failures, and connection failures at both ends of the line. Therefore, the corresponding fault inspection and maintenance activities should be carried out according to the actual connection status of the circuit.
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