Wholesale ABB capacitance, supply CLMD43/20KVAR 400V 50Hz

Dongguan Honghao Electrical Co., Ltd. (ABB agent), 

 Dongguan Honghui United Electrical Co., Ltd. (Mitsubishi dealers), 





 The role of the capacitor 
 Capacitors are widely used in a variety of high and low frequency circuits and power circuits, since decoupling (referring to eliminate or reduce the influence each other in a circuit between two or more), coupling (two or more circuit connection and interaction) filter (to filter out the interference signal, clutter, etc.), next to the A road (phase parallel with a component or a circuit, one end grounded), resonance (inductance in parallel or in series, The oscillation frequency is the same as the input frequency to produce the phenomenon of tuning, for example, select the radio frequency), blood pressure, timing and other role. 
 A. Capacitor 
 (1) capacitors: two close to each other and mutually insulated conductors composed of capacitors. Can be stored to accommodate the charge. 
 (2) capacitors with power: a plate carried by the absolute value of the electricity. 
 (3) capacitor charging and discharging: 
 ① Charge: charged process is called charging, after charging the board with the same amount of dissimilar charge. 
 ② Discharge: the charged capacitor loses charge called discharge. 
 Two. Capacitance: 
 Definition: (1) the potential difference ratio of brought electricity between two plates is called capacitance. Define the formula: 
 (2) The physical meaning: capacitance is the physical description of the capacitor charge storage ability to size, is numerically equal to the potential difference between the two plates of the capacitor to increase 1 V required charge plus electricity. 
 Note: The capacitor C is decided by its own structural factors, Q, U. 
 (3) The unit of capacitance: France. Symbol F. 1 F = 106 μF = 1012pF 
 3. Parallel plate capacitance C: parallel plate is proportional to the area S, the dielectric permittivity ε, and is inversely proportional to the distance d between the plates. 
 Parallel plate capacitor formula: C =. 
 Where k is the electrostatic constant. This type for the type of the decision of the parallel plate capacitor is easy to see that the capacitance of the capacitor size is determined by its own characteristics. Capacitor is described in physical characteristics, charged with the capacitor charge has nothing to do with or without. 
 4. Commonly used: fixed capacitors and variable capacitors from a structural point of view, can be divided into two categories. 
 Fixed capacitance of the capacitor is fixed; variable capacitor, usually by changing the poles on the area to change the capacitance. Of course, can also be changed by changing the distance between the poles, or changing charge the capacitor dielectric capacitors. 
 5 Rated voltage and breakdown voltage of the capacitor: the breakdown voltage is the threshold voltage, over the voltage within the media will be breakdown. The rated voltage is the voltage that can withstand the long-term work, it is lower than the breakdown voltage. Capacitor is not higher than the rated voltage is safe and reliable, do not mistakenly believe that the capacitor rated voltage is normal. 
 Capacitor has a "through exchanges, DC blocking" feature. DC polarity and voltage magnitude is fixed, and not be passed. The size of the polarity and voltage of the AC is constantly changing, and make continuous charge and discharge, the formation of charge and discharge current.