A fine-tuned capacitor, also called a semi-adjustable capacitor, has a capacity of between 5 and 45 PF. There are many kinds of them, and the following is common:1) Porcelain capacitor with fine-tuning: it is characterised by wear resistance and long service life. 2) Tube-type fine tuning capacitors

Capacitive reactance of capacitors.Capacitors have special resistance to AC, called capacitive reactance. Capacitive reactance can be calculated by the following formula, the larger the capacitor capacity, the higher the frequency of the current, the smaller the capacitive reactance is, and the easi

Alternating current can "pass through" capacitors.If the capacitor is connected to the AC circuit, the capacitor will charge alternately and discharge repeatedly because of the constant change of the AC voltage. At this time, there will still be no charge between the two poles of the capacitor. But

The capacitor can store the charge and has the function of isolating the DC.When the two electrodes of the capacitor are related to the positive and negative electrodes of the DC power respectively, the positive and negative charges will gather on the two electrode plates of the capacitor and form a

A capacitor is an energy storage element that consists of two metal plates and a dielectric interlayer dielectric. Any two conductors that are close together and insulated from each other will make up a capacitor that begins to store charge when a voltage is applied to the conductor.The process of c

Capacitors should be properly protected, such as balanced or differential relay protection or the use of instantaneous overcurrent relay protection, motor capacitance, for 3.15kV and above capacitors, each capacitor must be equipped with a separate fuse, fuse The rated current of the fuse should be

product description:The capacitor uses thickening of the edge of the metal zinc aluminum film as the electrode and medium. The film is wound by a winder and loaded into an aluminum housing. Then fill the housing with high purityCastor oil keeps it in a vacuum and can make the product resistant to hi

Generally, two aluminum foils are used as the electrodes, and the middle is formed by overlapping and winding the capacitor paper with a thickness of 0.008 to 0.012 mm.Manufacturing process is simple, cheap, can get a larger capacityUsually in the low-frequency circuit, usually can not be used in hi

In terms of structure, it can be divided into foil type and silver type. The silver electrode is directly on the mica with vacuum evaporation method or sintered by silver coating, due to eliminating the air gap, the temperature coefficient decreased significantly, the stability of the capacitor is a

Capacitance can be adjusted within a small range, and can be fixed to a certain capacitance value after adjustment.Ceramic trimmer capacitor Q value is high, the volume is small, usually can be divided into two kinds of round tube and wafer.Mica and polystyrene media are usually spring-type East, th