Why the transformer needs to be used for neutral grounding


The transformer needs to be grounded during operation, […]

The transformer needs to be grounded during operation, so that unnecessary damage to the transformer will not occur. Because the transformer is a high-voltage device, if it is raining, it will affect the voltage transmission of the transformer. But if the transformer is grounded, then the voltage will be transmitted to the ground along with the ground wire, which will not cause harm to the human body. So why should the transformer neutral wire be grounded?

The AC three-phase three-wire transmission and distribution system, whose neutral point is not grounded or grounded through high impedance, has 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, due to the non-fault phase-to-ground voltage rises √3 times, if it is not handled in time, it will easily develop into a two-phase grounding short circuit. In order to quickly eliminate the single-phase ground fault, the key is to have a protection device that correctly detects the single-phase ground fault loop. The JDZ (GRB) series grounding signal device has the characteristics of reliable action, high sensitivity, simple wiring and low price.

It is composed of a grounding current converter (JDL1) and a grounding protector (JDX1). The device takes into account the voltage limiting measures when passing large currents, and can withstand the ability of short-circuit currents flowing through two points of different phases. The JDZ (GRB) series grounding protection device can also be used as a lead-sequence current protection device to enable timely alarm and tripping of line faults. The structure of the transformer is magnetically permeable material, power frequency transformers use silicon steel sheets, and high frequency transformers use magnetic core conductive materials, enameled wires, copper skins, and copper tubes {using water cooling structure}.

Insulating materials, including technical parameters such as skeletons, insulating paper, and plastic films, run through from the beginning to the end from the specification of the selected material to the processing technology and structural design, and finally the technical performance and working characteristics of the finished product. The final appearance is all the effects of technical parameters. Transformer performance: There are two important performance indicators when the transformer is running under load. One is the voltage change rate, which reflects the quality index of the transformer's power supply voltage; the other is efficiency, which reflects the economic index of the transformer during operation. According to these two performance indicators, two operating characteristic curves can be drawn respectively, namely, the external characteristic curve and the efficiency characteristic curve.

ei transformers

Contact Us