编辑：廊坊矿用变压器厂家 日期：2019-03-22 人气：294
表贴廊坊矿用变压器的分类
Class 1-------------[C0G]
–Temperature compensaTIng capacitors: have low levels of barium TItanate, calcium TItanate, and other things added to increase the dielectric constant, or to get a desired temperature slope.
–Very low temperature drift ,aging, voltage coefficient, frequency coefficient, leakage, and dissipaTIon factor.
–Dielectric absorption is typically "low" but not usually specified.
–Size problem : The voltage breakdown is low
?Class 2-------------[X7R]
–Based mostly on barium titanate (Ba2 TiO3
–very poor temperature drift, high voltage-coefficient-of-capacitance and, high voltage-coefficient-of-dissipation factor, high frequency-coefficient-of-capacitance and a significant aging rate {the crystal structure}
?Class 3
–used only for DC blocking and P.S. bypassing, and even then, change in capacitance due to aging, temperature coefficient, and voltage coefficient must be taken into account.
–use the lowest K material that you can, and use them at a low percentage of rated voltage.
?Class 4 -------------[Z5U]
–the barrier-layer or reduced-titanate ceramics.
–low breakdowhttp://boertala.cybxgg.com/n voltage, high leakage and all-around terrible electrical properties.
–obsolete.
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