Complete set of high voltage shunt capacitor

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Complete set of HV shunt capacitor

1. Introduction

Complete set of HV shunt capacitor is mainly for the increase of power factor in power frequency power system and the improvement of voltage quality, and the decrease of linelosses.

2. Service Environment

Altitude: less than1000m.

Highest temperature: -40℃~+40

Installation andoperation site shall be no conductivity and no explosiveness dust, no harmfulgases and steam, no ferocity mechanical shock.

Installation site:Indoor or outdoor

3. Structure

Complete set of shuntcapacitor consists of shunt capacitor, series reactor, discharge coil, oxidearrester, disconnecting earth switch. Shunt capacitor, lying down or standingon steel frame, is connected according to certain electrical requirement, the devicecan be transported as a whole or parts, easy to installation, and can be equippedwith security net as well as designed and produced in various combination ways uponcustomer’s request, dry type core series reactor is suitable for indoor.

4. Main technological performance

Capacitance deviation:the ratio between measured capacitance and rated capacitance per phase is notmore than 0~+0.5%, the ratio between max. capacitance and min. capacitance amongthree phase is not more than 1.02.

The device is ableto operate under 1.05 times rated voltage for a long time.

The device is ableto operate continuously when the root mean square value is not more than 1.3times rated current. The over current is caused by harmonics and over-voltage.








Zinc oxide arrestor



Dry core reactor



Discharge coil



HV fuse





8.1 Technical parameter for cabinet type shunt capacitor compensation device

8.2  Thechinal parameters for frame type shunt capacitor compensation device

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Q:What is the relationship between capacitance and voltage?
In your case, you can think of two capacitors as two containers, 5v capacity than 10v half (because they are 0.01uF),
Q:Capacitance for AC and DC effects?
Current waveform ahead of the voltage 90 degrees, in a sine wave cycle, half of the time ( Voltage waveform 0-90 degrees and 180-270 degrees) power to charge the capacitor, while the other half of the time (voltage waveform 90-180 degrees and 270-0 degrees) capacitance of the power discharge, the power and intact return power The
Q:Why some Y capacitor is very small, and some Y capacitor is very large?
As a capacitor of the Y capacitor, it is required to obtain the certification of the safety inspection mechanism. Y capacitor appearance is mostly orange or blue, are generally marked with safety certification mark (such as UL, CSA and other logo) and pressure AC250V or AC275V words. However, its true DC withstand voltage is above 5000V. It must be emphasized that the Y capacitor can not be used with a nominal capacitor such as the nominal voltage AC250V or DC400V.
Q:Use capacitance to do transformer how to calculate
The principle of capacitor buck is not complicated. His working principle is to use the capacitor at a certain AC signal frequency to produce capacitive reactance to limit the maximum operating current. For example, in the 50Hz frequency conditions, a 1uF capacitance generated by the capacitive reactance of about 3180 ohms. When 220V AC voltage is applied to both ends of the capacitor, the maximum current flowing through the capacitor is about 70mA.
Q:Does anyone know the difference between the stray inductance of the capacitor and the parasitic inductance?
The stray inductance is represented by conductors in the circuit, such as connecting wires, component leads, element bodies, etc.
Q:What is the principle of capacitance isolation?
When the capacitor is connected to the DC circuit, there will be a brief charging process. When the positive and negative plates are filled with charge (when the voltage across the capacitor is equal to the supply voltage), there is no current and then flow, so the capacitor is isolated DC current
Q:Is the capacitor attached to the carbon foil positive?
The negative electrode of the capacitor is made of electrolyte, the electrolyte is generally composed of boric acid, ammonia, ethylene glycol and other components.
Q:What kind of capacitance can be divided into?
Aluminum electrolytic capacitor It is made of aluminum cylinder negative, which is equipped with liquid electrolyte, insert a curved aluminum belt made of positive electrode. Also need to go through the DC voltage treatment, so that the formation of an oxide film on the positive film to do the media. It is characterized by large capacity, but large leakage, large error, poor stability, often used for AC bypass and filter, when the request is not high when used for signal coupling. Electrolytic capacitors are positive and negative points, the use can not be reversed. There are positive and negative polarity, the use of time, positive and negative do not reverse.
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:What is the electrolytic capacitor inside?
Electrolytic capacitor is a dielectric of a dielectric electrolyte coating has a polarity, positive and negative can not be connected wrong. Electric capacity (Electric capacity), by the two metal pole, the middle folder with insulating material (medium) composition.

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