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What Is high voltage capacitor ？How To Choose And Related Application Areas

What Is high voltage capacitor ？How To Choose And Related Application Areas

September 12 , 2023 0

High-voltage capacitors are composed of cylinders, cylinder tops, flat caps or hemispherical shaped heads, sealing elements and some accessories. Capacitors have the characteristics of low loss and light weight, and high voltage power capacitors comply with most national and international standards for capacitors. High-voltage capacitors are composed of a cylinder, a cylinder top, a flat cap or hemispherical head, sealing elements and some accessories. Capacitors have the characteristics of low loss and light weight, high voltage power capacitors comply with most national and international capacitor standards.

What Is High Voltage Capacitor ?

High-voltage capacitors are mainly composed of outlet ceramic casing, capacitor element group and shell.
　　Shell with thin steel plate sealing welding and become, outlet ceramic casing welded to the shell. Terminal leads from the outlet casing. Capacitor element group in the shell (also known as the core) by a number of capacitor elements connected to become. Capacitor elements are made of capacitor paper, film paper composite or pure film as a medium, with aluminum and platinum as a pole plate rolled and become.
　　In order to adapt to the requirements of various voltage levels of capacitor voltage, capacitive elements can be connected in series or parallel.
　　Single three-phase capacitor capacitor element group inside the shell connected to the triangle.
　　In the voltage of 10kV and the following high-voltage capacitors, each capacitor element is strung with a fuse, as the capacitor's internal short-circuit protection. Some capacitors are equipped with a discharge resistor, when the capacitor is disconnected from the grid, it can be discharged through the discharge resistor, and the residual voltage of the capacitor can be reduced to less than 75V after 10min under normal circumstances.

Role of High Voltage Capacitors

High voltage shunt capacitors are mainly used in AC power systems of 1kV and above at industrial frequency (50Hz or 60Hz) to improve power factor and power grid quality.

How To Choose High Voltage Capacitors

Reasonable Determination Of The Capacity And Error Of High-voltage Capacitors

The value of high-voltage capacitor capacity must be selected according to the specified nominal value.High-voltage capacitors have a variety of error levels, in the low-frequency coupling, decoupling, power supply filtering and other circuits, high-voltage capacitors can be selected ± 5 per cent, ± 10 per cent, ± 20 per cent, and other error levels, but in the oscillation circuit, time-delay circuits, tone control circuits, high-voltage capacitors to be a slightly higher accuracy; in a variety of filters and a variety of networks, the requirements of the selection of high-precision high-voltage capacitors.

Selection Of Withstand Voltage Value

In order to ensure the normal operation of high-voltage capacitors, the selected high-voltage capacitor's withstand value should not only be greater than its actual working voltage, but also to leave enough room, the general selection of withstand voltage value for the actual working voltage more than twice the high-voltage capacitor.

Pay Attention To The Temperature Coefficient And High Frequency Characteristics Of High Voltage Capacitors.

High-voltage capacitors with small temperature coefficients should be selected for oscillating elements, phase-shifting network elements, filters, etc. in oscillating circuits to ensure their performance. In high-frequency applications, due to the high-voltage capacitor's own inductance, lead inductance and high-frequency loss, the performance of the high-voltage capacitor will deteriorate.
I believe that after reading this article, we know how to correctly select high-voltage capacitors. We specialise in the manufacture of safety capacitors, high voltage capacitors, varistors, film capacitors, quality is guaranteed, is your assured choice.