Alternating current filter capacitor

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Alternating Current Filter Capacitor

(AC Filter Capacitor)



1.    Introduction

AC filter capacitor connected with filter reactor and resistor together form AC filterequipment used for filtering

harmful harmonic current in the power system and the improvement of power factor of the system.



2.    Structure

Take aluminum foilas polar plate and polypropylene film as medium, inside of the capacitor tank isfilled with impregnant.



3.    Service condition

Installation site:  indoor, outdoor, plateau, dump and hot, foalland, etc.

Ambient temperature:-40~ +45

Standard: GB11024 “Shunt capacitors of nominal voltage 1KV and above for AC power systems”.




4. Main parameters


AAM type AC filter capacity (with internal fuse)

kV-Rated Voltage, kVar-Rated capacity, UF-Rated capacitance, kg-Weight


 

 No.                Type                   kV             kvar            uF         kg        W mm     h1 mm    h mm      H mm






AAM type AC filter capacity (without internal fuse)

kV-Rated Voltage, kVar-Rated capacity, UF-Rated capacitance, kg-Weight





AFM type AC filter capacity (with internal fuse)

kV-Rated Voltage, kVar-Rated capacity, UF-Rated capacitance, kg-Weight




AFM type AC filter capacity (without internal fuse)

kV-Rated Voltage, kVar-Rated capacity, UF-Rated capacitance, kg-Weight




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Q:What is the use of capacitors?
As a passive component of the capacitor, its role is nothing more than the following; applied to the power circuit, to achieve bypass, decoupling, filtering and energy storage role, the following classification:
Q:Does the size of the capacitor affect the power consumption?
Therefore, users not only need to understand the performance of various types of capacitors and general characteristics, but also must understand the advantages and disadvantages of various components under given use, mechanical or environmental constraints, etc. This article describes the main parameters of the capacitor and application , For readers to choose the type of capacitor used.
Q:What are the differences between capacitors and capacitors?
Capacitance, resistance, inductance is physical quantity. Capacitors, resistors, inductors are components that have a specific physical quantity (capacitance, resistance, inductance).
Q:What is the principle of capacitance isolation?
When the capacitor is connected to the AC circuit, there is also a charging process in which the charge is stopped when the capacitor voltage is equal to the supply voltage, and then the power supply voltage drops and the capacitor begins to discharge.
Q:How does the capacitor work? What does it do?
The bypass capacitor is an energy storage device that provides energy to the local device, which can equalize the output of the regulator and reduce the load demand. Like a small rechargeable battery, the bypass capacitor can be charged and discharged to the device. To minimize the impedance, the bypass capacitor should be as close as possible to the load device's power supply pin and ground pin.
Q:What kind of capacitance can be divided into?
The paper dielectric is made of two pieces of metal foil, made of very thin capacitor paper, rolled into a cylindrical or flat cylindrical core, and then sealed in a metal shell or insulating material (such as paint, ceramics, glass glaze, etc.) production. It is characterized by a smaller size, capacity can be done bigger. But there are inherent inductors and losses are relatively large, suitable for low frequency.
Q:What is the difference between polyester film capacitors and ceramic capacitors?
Good stability. From the chemical performance, acid, alkali, salt and water corrosion of ceramic materials is very small, from the heat resistance, the ceramic material in the high temperature of up to 500 ~ 600 ℃, long-term work without aging
Q:Why does the circuit current gradually decrease when charging the capacitor?
due to the increase in the number of charge, the electrostatic field field strength will gradually increase, increasing the field strength caused by the absorption of electrons to produce exclusion, So that the number of adsorbed charges gradually reduced, the number of charge to reduce the performance of the phenomenon that the charging current is gradually reduced. When the number of charges on the two electrode plates of the capacitor reaches a gradually increasing field strength constraint, the amount of charge is not increased and the equilibrium state is reached, that is, the charge saturation current is zero.
Q:Cd capacitance to express what
Using polypropylene film as a medium, with a special electrode to the cylindrical core connected into a series structure, the core wrapped plastic tape, both ends with flame retardant epoxy resin package. With a small self-inductance, equivalent series resistance is low, loss is small, high insulation resistance, good frequency characteristics and can withstand high voltage, high current impact and other characteristics.
Q:How to identify high voltage capacitors is good or bad
This is a special place for high voltage capacitors in microwave ovens. Because in this capacitor in parallel with a 10M capacitor. So the capacitor does not leak when the final resistance is 10M. Not infinity

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