Voltage transformers are crucial components of power distribution systems. The proper selection of these products is crucial to the overall operation of the power system. Power industry professionals must understand the selection of voltage transformers, as they come in many different models and types. Each model and type of voltage transformer has a different purpose, installation method, and structure. Let's take a closer look at voltage transformer selection.
First, when purchasing this transformer, you must first understand the main function of the voltage transformer. According to their use, voltage transformers can be divided into protective voltage transformers and measuring voltage transformers. The function of the protective voltage transformer is to convert high voltage into the low voltage required by the secondary components of the power system (such as microcomputer protection devices, switchgear intelligent control devices, instruments and meters, etc.), while the main function of the measuring voltage transformer is to measure and collect the voltage status of the primary circuit high voltage and the secondary circuit high voltage. When making a selection, you must understand the purpose of the transformer used in the project. If it is the former, choose the protective voltage transformer; if it is the latter, choose the measuring voltage transformer.
2. When selecting a voltage transformer, you must first understand whether the transformer is used indoors or outdoors. If it is used indoors, you must choose an indoor voltage transformer. If it is used outdoors, you must choose an outdoor voltage transformer.
Third, when purchasing, it's important to clearly define the voltage level of the project's power distribution system. Generally, voltage transformers are categorized into four levels based on voltage: low-voltage transformers, which primarily operate at voltage levels of 1000V and below. Medium-voltage transformers are primarily suitable for power distribution systems with rated voltages between 3kV and 110kV. High-voltage transformers are generally used in voltage levels of 220-500kV, while those above 500kV must utilize ultra-high-voltage transformers. When selecting this product, power industry professionals must understand the voltage level of their distribution project and select a voltage transformer that meets the requirements.
Fourth, we must understand the insulation type. The insulation type is something we must pay attention to. If the wrong choice is made, it will bring serious consequences to our power distribution system. Therefore, this must be made clear. Voltage transformers are classified according to insulation. Generally, there are two types, one is fully enclosed and the other is semi-enclosed. Although this is relatively simple, it must also be taken seriously.
Fifth, you must understand the product's insulation medium type. Voltage transformers can be divided into dry-type voltage transformers, cast-type voltage transformers, oil-immersed voltage transformers, and gas-insulated voltage transformers according to their insulation medium. Therefore, when selecting a voltage transformer, you must clarify which type of voltage transformer is used in the project. Don't make a mistake.
6. You must understand the conversion principle of the voltage transformer. Voltage transformers can be divided into capacitive and electromagnetic types according to the conversion principle. The electromagnetic voltage transformer converts high voltage electricity into low voltage electricity that our secondary equipment can use in proportion, while the capacitive voltage transformer mainly extracts voltage from the capacitor. The principles of the two are not the same. Before selecting and purchasing, you must understand which one is more reliable for the entire power distribution system.
As long as we purchase voltage transformers according to the above principles, it will definitely save you a lot of trouble and better ensure the reliable and stable operation of the entire power system. At the same time, we also hope that colleagues in the industry will actively put forward their opinions and suggestions. We will actively listen to and absorb the opinions of the majority of users and make our own contribution to our power distribution industry.
