What are the commonly used term capacitor, how to understand?

The commonly used standard terminology

derive cap category temperature ( TCH) : capacitor design to determine the highest temperature can work continuously

in pieces the lower category temperature ( TCL) : capacitor design can work continuously the lowest environment temperature

has rated temperature ( TR) : can apply continuous rated voltage of the highest temperature

in pieces the rated voltage ( UR ） : in the lower limit of category and rated temperature between any of the temperature, can apply for the biggest dc voltage or pulse voltage on the capacitor peak

to cardiac category voltage ( 加州大学) : capacitor in the ceiling area temperature can be continuous on the highest voltage on the capacitor

temperature voltage derating: between the rated temperature and temperature limit category at any temperature, can apply for the highest voltage on the capacitor

to cardiac climatic categories: capacitor's climate category with oblique line separating the number three ( IEC 60068 - 1: such as: 55/100/56) 55/100/56 lower category temperature ( - 55 ℃ ） Ceiling category temperature ( +100 ℃ ） Steady state experiment of damp and hot days ( 56 days)

mixer temperature coefficient (capacity α ） : capacitor in the specified temperature range capacity with temperature change rate. Usually in 20 ℃ when capacitance for reference, with one over one million degrees Celsius (per 10 - 6/ ℃ ） Said. （ 10 - 6/ ℃ = 1ppm/ ℃ ） Ci: capacitor C0 capacity during temperature Ti: capacitor in T0 ( 20± 2) ℃ when the capacity of the

filled insulation resistance ( 我。 R。 ) / time constant ( t) : insulation resistance for capacitor charging dc voltage for a minute and flowing through the capacitor leakage current value ratio, unit for MΩ 。 Time constant is the product of the insulation resistance and capacitance, usually expressed in seconds, formula is as follows: t [ s] =I. R。 ( MΩ ] × C ( μ F] Under normal circumstances, the insulation resistance is used to describe the small capacity of capacitor insulating properties, the time constant is used to describe the large capacity ( Such as: CR> 0. 33μ F) Capacitor insulation characteristics.

pieces loss tangent ( tgδ ） : under the effect of frequency sine wave voltage, the capacitor loss power divided by the capacitor reactive power

to cardiac self-healing ( Only the metallized film capacitor) : metallized film metal coating is the metal by the method of vacuum evaporation deposition on the film, the thickness of a few dozen nanometers, when weakness, impurity on the medium, partial wear may occur, the wear of the arc discharge produced enough energy to make wear point nearby metal coating evaporation, breakdown point with the surrounding plates and capacitor electrical properties can be back to normal

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Individuals with varied technical skills use air conditioner capacitor in a wide range of applications.