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.





No.

Name

Code

1

Disconnector

QS/QG

2

Zinc oxide arrestor

FV

3

Dry core reactor

L

4

Discharge coil

TV

4

HV fuse

FU

4

Capacitor

C




8.1 Technical parameter for cabinet type shunt capacitor compensation device




8.2  Thechinal parameters for frame type shunt capacitor compensation device


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: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:How to identify high voltage capacitors is good or bad
There is a series in 220v AC power inside, see if the light bulb can be normal light. Determine if the capacitor has capacity. Whether the initial test is normal.
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:How to use the capacitor
Circuites that are forbidden use: Even if the customer installs a solid-state aluminum capacitor in strict accordance with the welding conditions we have given, the leakage current of the solid-state aluminum capacitor may also increase or even increase significantly.
Q:Capacitance can pass high frequency resistance low frequency principle
Capacitor has a direct effect on the direct current, refers to the DC current on the capacitor charge is completed, the circuit does not flow current. In the DC power supply just added to the capacitor, the circuit is a current flow, the current is the charge current of the capacitor.
Q:What is the phase-shifting capacitor, what is the difference between it and the general capacitor
After the power is turned off, the charge will not disappear, nor will it be neutralized (after all, between the two plates is insulated, positive and negative charge can only attract each other, and can not be combined), so that the potential difference has been there until you To discharge, the bipolar plate with a wire, the electrons along the wire from the lower plate to move to the upper plate, the potential difference disappeared.
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: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: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:

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