1.Multimeter detection method For fixed capacitors above 0. 01 μ F. The R × 1k block of the multimeter can be used to directly test whether the capacitor has charging process and whether there is internal short circuit or leakage, and the capacity of the capacitor can be estimated according to th

Tangent of loss angle, temperature characteristic, current value and equivalent resistance are the key parameters of capacitor. The lower the equivalent resistance is, the better. The equivalent resistance is related to the CR, frequency, UR and temperature range of the capacitor. The larger the CR

The voltage value of capacitors is a problem that technicians attach importance to, no matter what capacitance you are using, it is necessary to know the voltage value of capacitor. What we are going to talk about is about the voltage value of the ceramic chip capacitance, which can let people kn

In electronic circuits, high-voltage capacitors are used to block DC and to store and release charges to act as filters to smooth out pulsating signals. A small capacitance, usually used in high-frequency circuits, such as radios, transmitters, and oscillators. Large capacity capacitors are of

Third, the function of holding solder with low melting point by spring. This function is a technique used by most of the current surge protectors of the surge arrester manufacturer to add a low melting point solder welding joint to the pin of the varistor, and then hold the welding point with a

Isolation function. This function keeps the varistor in a sealed box, separated from other circuits, to prevent the extension of the varistor fog and combustion. Current fuse function. This function wraps the varistor and the current fuse in series and uses heat conduction to fuse the leak

2. Characteristics Compared with electromagnetic voltage transformer, capacitive voltage transformer has the advantages of high impact insulation strength, simple manufacture, light weight, small volume, low cost, reliable operation, convenient maintenance and can also be used as coupling capac

Working principle of capacitive voltage transformer Capacitive voltage transformer is essentially a capacitor divider. For the sake of analysis, the capacitor string is divided into two parts: main capacitor C1 and voltage divider C2, as shown in the upper left figure. If the relative

4. Price issues The key to replace aluminum electrolytic capacitors with thin film capacitors is price. If the film capacitor with rated voltage of 700V can be used to replace the aluminum electrolytic capacitor, the capacitance of 1F ~ 2F per RMB can be replaced.Some capacitor manufacturers be

Three-phase bridge rectifier circuit or 12-phase rectifier circuit is not necessary to connect DC bus capacitor across the rectifier output because there is no current abrupt change in the application of load current no sudden change. Inductive potential produced by parasitic inductors of recti