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The structure of the voltage transformer is shown in Figure (a). Its function is to extend the range of the AC voltmeter and isolate the high voltage from the electrical workers.The operating principle is similar to the no-load condition of ordinary transformer.When in use, the high-voltage winding with more turns should be bonded to the power supply line that needs to measure its voltage, while the low-voltage winding with less turns should be connected to the voltmeter, as shown in figure (b) below.

Since U1/U2=K, U1=KU2, it can be seen that the voltage of the high-voltage line is equal to the product of the voltage measured by the secondary side and the transformer ratio.When the voltmeter is used with a dedicated voltage transformer, the scale of the voltmeter can be marked according to the voltage on the high-voltage side of the voltage transformer. In this way, the voltage value of the high-voltage line can be read directly from the voltmeter without conversion.

Generally, the rated voltage of the secondary side winding of the voltage transformer is designed with the same standard value of 100 volts.Therefore, voltage transformers used in different voltage classes of circuits have different transformer ratios, such as 1000/100, 600/100 and so on.

J Voltage transformer model：

D Single phase

Z Casting type

F With residual voltage winding

7 Design Number

10 Voltage class（kV）

GYW1 Plateau Dirty
Keywords:HADA
- Current Transformer，Phase voltage transformers

The company is located in Yantai, a picturesque coastal city in China. The company's main products include damping reactors, current-limiting reactors, thyristor control reactors (TCRs), filter reactors, smoothing reactors, arm reactors, and starting reactors, among others.

The Hada workshop covers an area of 22,000 square meters and is equipped with state-of-the-art auto winding machines and inspection equipment. With an annual capacity of 40 million USD, the company is capable of conducting routine tests on all types of air-core/iron-core reactors and line traps.

In addition to the production of reactors, Hada Electric also provides a wide range of high-quality electrical products and professional solutions for the generation, transmission, and distribution segments of the industry. The company's offerings include reactors, insulators, line traps, capacitor banks, resistors, bushings, surge arresters, CTs, PTs, GISs, AISs, CBs, among others. The company's success is attributed to its competitive prices, on-time delivery, highly qualified and dedicated employees, advanced technology, and overall superior quality.

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