• Alternating current filter capacitor System 1
  • Alternating current filter capacitor System 2
Alternating current filter capacitor

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




Q:What is the phase-shifting capacitor, what is the difference between it and the general capacitor
Assuming a capacitor has upper and lower poles, the upper plate is connected with the positive pole, the lower plate is connected with the negative electrode, connected with the power source, the potential difference between the two plates is formed, and the potential difference between the two electrodes is equal,
Q:How to judge the capacitor is good or bad?
Multimeter selection R × 1k block. Both triodes have a beta value of 100 or more and a small penetration current. Can choose 3DG6 and other types of silicon transistors composed of composite pipe. The multimeter's red and black test leads are connected to the emitter e and collector c of the composite tube, respectively.
Q:What kind of capacitance can be divided into?
Commonly used capacitor structure and characteristics Commonly used capacitors can be divided into their dielectric materials electrolytic capacitors, mica capacitors, ceramic capacitors, glass glaze capacitors and so on.
Q:Is the capacitor attached to the carbon foil positive?
Electrolytic capacitors of the positive plate with aluminum foil, immersed in the electrolyte for anodic oxidation treatment, aluminum foil surface will produce a layer of aluminum oxide film, the thickness is generally 0.02 - 0.03μm. This layer of oxide film is positive and negative insulation between the plates.
Q:Why some Y capacitor is very small, and some Y capacitor is very large?
They all belong to the safety capacitor, which requires the capacitance value can not be too large, and the pressure must be higher. Under normal circumstances, work in the subtropical machine, the required leakage current can not exceed 0.7mA; work in the temperate machine, the required leakage current can not exceed 0.35mA. Therefore, the total capacity of the Y capacitor is generally not more than 4700PF (472).
Q:Why does the circuit current gradually decrease when charging the capacitor?
For the ideal capacitor, when the capacitor is charged, as the voltage across the capacitor gradually increases, the charging current will gradually decrease until zero.
Q:Capacitance can pass high frequency resistance low frequency principle
This process of current flow will soon end, the specific length of time and the resistance of the circuit and the size of the capacitor, the larger the size of the product the greater the charging time, the shorter the contrary. After charging is complete, the voltage across the capacitor is equal to the size of the DC supply voltage
Q:Low voltage capacitor voltage 0.45 and 0.4 What is the difference between usage
0.45 capacitor used in the voltage level is high (for example, the transformer low voltage side voltage may reach 415V), with a tuned reactor (tuning reactor will increase the capacitor terminal voltage) situation; Note that the actual capacity of 0.45 capacitor nominal capacity (Actual voltage / 0.45) ^ 2 times;
Q:What is the difference between the power capacitor and the complement?
A total of three-phase compensation at the same time, sub-compensation is a single-phase compensation.
Q:Cd capacitance to express what
Mainly speaking, the winding process of the capacitor is a non-inductive winding structure (relative, there is a sense of winding structure), in fact, no sense of capacitance is not no inductance, but the inductance is very small, for high-frequency operation of the capacitor, We emphasize no sense. In fact, the inductance is small. From this point of view, almost all of the metal film capacitors are no sense

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