High Voltage Ceramic Capacitors

Definition

High voltage ceramic capacitor, as its name implies, is a capacitor with epoxy resin embedment based on dielectric ceramic as the core materials. With the progress of the times and the development of science and technology, high voltage ceramic capacitor now mainly refers to the capacitor with AC operating voltage above 10KV, or ceramic capacitor with DC operating voltage up to above 40KV. (Usually in the past Y capacitor of 250V and 400V is also divided into high -voltage ceramic capacitor).

Types

According to their purpose and different appearances, high voltage ceramic capacitors can be divided into lead type, bolt type, foot type, AC type, DC type, and high power type high voltage ceramic capacitor. Here both AC and DC capacitors are mainly set out on applications.

1. Civilian DC high voltage ceramic capacitor is mainly applied in machinery equipment detection instrument, such as X-RAY, CT machine, and DC high pressure generator, which are mainly for voltage-multiplying, partial pressure, filter, coupling, as well as carrier. DC high pressure ceramic capacitor will be selected differently due to different occasions. Usually, Y5V and Y5U these low frequency media ceramic capacitors can only be applied on occasions within 1KHZ, mainly works in 50HZ power frequency. Y5T and Y5P II ceramic capacitors can be used at high frequency (30KHZ~100KHZ). N4700 can be used in high-frequency environment in more than 550KHZ. The higher material grade is, the higher frequency range is. For example, NP0, N150, and N750 can be used in above 1GHZ. Civilian DC high voltage ceramic capacitors primarily include the following parameters: voltage classes, capacity classes, temperature coefficients, appearance and size, frequency characteristic, loss factors, insulation resistance, leakage current, as well as the internal resistance.

2. AC high pressure ceramic capacitor is mainly for the application in work occasions with alternating voltage, such as power detection equipment and national power grid equipment. There are strict high indicators on AC high pressure ceramic capacitors. General they require the following parameters: alternating work voltage, lightning impulse voltage, partial discharge level, rate of temperature change, high frequency characteristics, loss tangent value, voltage linearity characteristic, excess current capacity, insulated resistance, and leak current. Those indicators above are must have indicators for electric power companies to measure whether a capacitor meets requirements or not. In addition, there would be size, coating materials, appearance and other requirements.

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Classification of Capacitors

Capacitors Overview

The current condenser is usually referred to as a capacitor, represented by the letters C. Capacitor, as the name suggests, is a 'container to store electric', is a device to accommodate the charge. Capacitance is one of the f electronic equipments extensively use in industries, and the electronic components are widely used in circuit interval through AC coupling, bypass, filtering, tuning circuit, energy conversion and control. Capacitor is a conductor (wire) formed between any two mutually insulated and closely spaced.



Capacitors Classification

Capacitors, according to structures, can be divided into three major categories: fixed capacitors, variable capacitors and trimmer capacitors; according to electrolyte, it can be divided into organic dielectric capacitors, inorganic media capacitor, electrolytic capacitor and air dielectric capacitor; if divided by purpose, there are: high frequency bypass, low frequency bypass , filtering, tuning, high frequency coupling, low-frequency coupling, small capacitors; according to different materials, it can be divided into: ceramic capacitors, polyester capacitors, electrolytic capacitors, tantalum capacitors, as well as advanced polypropylene capacitors, etc.; high-frequency bypass: high-voltage ceramic capacitor, mica capacitor, glass film capacitors, polyester capacitors, glass glaze capacitors; low frequency bypass: paper dielectric capacitors, ceramic capacitors, electrolytic capacitors, polyester capacitors; filtering: aluminum electrolytic capacitors, paper capacitor composite paper dielectric capacitors, wet tantalum capacitors; low coupling: paper dielectric capacitors, ceramic capacitors, electrolytic capacitors, polyester capacitors, solid tantalum capacitors, and the plastic film capacitor is one of the most widely used capacitors in industry.

Capacitor Model Name

Generally, the domestic capacitor model consists of four parts (does not apply to the pressure-sensitive, variable vacuum capacitors). In turn represent the name, materials, classification, and serial number. The first part: Name, expressed in letters, capacitor C. Part II: material, represented by the letters. Part III: Classification, general numerals, the individual with the letter. Part IV: No. numerals. Air conditioning accessories capacitor indicate the material with letters: A-tantalum electrolytic, B-non-polar polystyrene film, C-frequency ceramic, D-aluminum electrolytic, E-other materials electrolysis, G-alloy electrolysis, H- polar organic thin film of the composite medium, I-glass glaze, J-metallized paper, polyester, etc. of L-N-niobium electrolytic O-glass film, Q-film, a T-low frequency ceramic, V-mica paper, the Y- mica and Z-paper capacitor.

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