Methods to Determine Coil TemperatureThere are several methods to determine coil temperature, and the choice depends on the application scenario, required accuracy, and available equipment and technology. Below are some commonly used methods to determine coil temperature:1. Direct Measurement Methodsa. Thermocouples Principle: Thermocouples utilize the thermoelectric effect produced by the contact of two different metal materials to measure temperature. Usage: Install the thermocouple probe near

Advantages of Step-Up Autotransformers Compared to Step-Up TransformersStep-up autotransformers and traditional step-up transformers have some notable differences in design and application. Below are the advantages of step-up autotransformers over traditional step-up transformers, as well as the typical scenarios where they are used.Advantages of Step-Up AutotransformersHigher Efficiency: Reduced Copper Losses: Due to the shared winding between the primary and secondary sides, the total length a

What Happens Inside a Surge Protective Device During a Lightning Strike?During a lightning strike, surge protective devices (SPDs) play a crucial role in protecting electrical equipment from transient overvoltages (i.e., surges). Below are the main processes and mechanisms that occur inside an SPD during such events:1. Surge Detection and ResponseWhen a surge caused by a lightning strike enters the power system, the surge protective device quickly detects this abnormal voltage. Typically, SPDs h

1. DefinitionWhat is commonly referred to as a "permanent capacitor" is likely a popular term. Strictly speaking, it may refer to a fixed capacitor. A fixed capacitor is a type of capacitor with a constant capacitance value. In a circuit, its capacitance will not change due to normal voltage, current variations, or other common external conditions. Its main functions include storing electrical energy, filtering, coupling, and bypassing.2. Structure and PrincipleStructureTake the common ceramic c