UTP28CH5RD

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Utility pole-mounted gear-type current transformer UTP28CH5RD is an important device in the entire monitoring circuit of power grid. Its application field is mainly power monitoring, high-voltage protection and other power distribution automation fields. The following will introduce the working principle of UTP28CH5RD in detail.

UTP28CH5RD is an epoxy-insulated shell structure current transformer, with bolted flange connection, installation convenient and fast, and is suitable for the current measuring of 50-220kV power grid. In the process of use, the primary winding plays the role of detecting the current of power grid user, collecting the signal, and then outputting it to the corresponding monitoring equipment for further processing, such as PD overload protection, current limit, etc. The secondary winding is connected to the monitoring equipment to receive the output signal.

UTP28CH5RD is composed of primary winding and secondary winding, which are installed in the upper and lower parts of the insulated shell respectively. When the current signal is passed through the primary winding, the high-frequency current is induced in the secondary winding at the same time, and the output terminal is connected to the secondary winding to receive the current signal. After the input current passes through the transformer core, it is proportional to the output current of the secondary winding in both the magnitude and phase. This output current is filtered by a filter circuit, and then converted into a voltage signal corresponding to the current signal by the secondary winding.

The input current signal is converted into a voltage signal of the corresponding magnitude and phase by UTP28CH5RD, and the voltage signal is strong and stable, and can be amplified accurately. The coil material of UTP28CH5RD is selected according to the voltage grade, and the insulation performance of the coil is required to be higher than that of the transformer. The insulation resistance is generally not lower than 100MOhms, and the insulation strength in a certain voltage is not lower than 2000V. In addition, due to the characteristics of the epoxy potting structure, the overall size of UTP28CH5RD is small, and it is convenient tos transport and install, and the protection grade reaches IP67.

In summary, UTP28CH5RD has the advantages of fast and fast response, strong and stable voltage signal output, convenient installation and maintenance, accurate current signal conversion and monitoring, and reliable safety performance. Its application field is mainly the power monitoring, high-voltage protection and other power distribution automation fields in the power grid system. Its working principle involves the detection, filtration, and signal conversion of the current signal, which can ensure that the output voltage signal is strong and stable.

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