Why should the neutral of the transformer be grounded
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Published:
2019-12-05
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The transformer needs to be grounded during operation so that the transformer will not be unnecessarily damaged. Because the transformer is a high-voltage device, if you pay little attention to it in rainy days, it will affect the voltage transmission of the transformer. However, if the transformer is grounded, the voltage will be transmitted to the ground with the ground wire, which will not cause harm to the human body. So why should the neutral line of the transformer be grounded?
The transformer needs to be grounded during operation so that the transformer will not be unnecessarily damaged. Because the transformer is a high-voltage device. if you pay little attention to it in rainy days, it will affect the voltage transmission of the transformer. However, if the transformer is grounded, the voltage will be transmitted to the ground with the ground wire, which will not cause harm to the human body. So why should the neutral line of the transformer be grounded?
AC three-phase three-wire power transmission and distribution system, whose neutral point is not grounded or grounded through high impedance, has the advantages that other methods cannot match. In this kind of system, single-phase grounding, although it does not destroy the symmetrical operation of the system, but due to non-fault, the relative ground voltage rises √3 times. If it is not handled in time, it can easily develop into a two-phase grounding short circuit. In order to quickly eliminate single-phase ground faults, the key is to have protection devices that correctly detect single-phase ground fault circuits. JDZ (GRB) series ground signal device has the characteristics of reliable action, high sensitivity, simple wiring and cheap price.
It is a matching combination of ground current converter (JDL1) and ground protector (JDX1).
The device takes into account the ability to withstand short-circuit currents flowing through two points of out-of-phase ground through voltage limiting measures at high currents. The JDZ (GRB) series grounding protection device can also be used as a lead sequence current protection device. so that line faults can be alarmed and tripped in time. Transformer structure magnetic permeability material, power frequency transformer using silicon steel sheet, high frequency transformer using magnetic core conductive material, enameled wire, copper sheath, and copper pipe {using water cooling structure}.
Insulation materials, including the technical parameters of the skeleton, insulation paper, plastic film, etc. This article runs from the specification of the selected material to the processing technology and structural design from the beginning to the end, and is finally implemented in the technical performance and working characteristics of the finished product. The appearance of the final appearance is all the effect of technical parameters. Transformer performance: There are two important performance indicators when the transformer is running under load. One is the rate of change of voltage, which reflects the quality index of the transformer supply voltage; the other is the efficiency, which reflects the economic indicators of the transformer during operation. According to these two performance indicators, two operating characteristic curves can be drawn, namely the external characteristic curve and the efficiency characteristic curve.
