电力电容型号与规格主要是为了匹配变压器或者用电负载，以保证电容器在使用过程中的安全稳定，简而言之，就是给设备提供合适的元器件，保证设备正常运转。

　　The main purpose of power capacitor model and specification is to match the transformer or electrical load, so as to ensure the safety and stability of the capacitor in the process of use. In short, it is to provide appropriate components for the equipment to ensure the normal operation of the equipment.

　　常见电力电容型号

　　Common power capacitor models

　　电容器型号会因为填充介质，电压，谐波等不同而有所差异，现在我们以CKKB440-20-3-G为例，详细介绍一下电力电容器型号。

　　Capacitor model will be different due to different filling medium, voltage, harmonic and so on. Now we take ckkb440-20-3-g as an example to introduce the power capacitor model in detail.

　　电力电容器型号表示

　　Power capacitor model indication

　　第一组数字440为电力电容电压等级，表示电力电容电压为440V。

　　The first group of numbers 440 is the voltage level of power capacitor, which means that the voltage of power capacitor is 440V.

　　第二组数字20为电力电容容值，表示电力电容容量为20Kvar。

　　The second group of numbers 20 is the power capacitance value, which indicates that the power capacitance capacity is 20kvar.

　　第三组数字3为电力电容相数，表示电力电容为单相电力电容。

　　The third group of numbers 3 is the number of power capacitor phases, which indicates that the power capacitance is single-phase power capacitance.

　　随着生产设备自动化的发展，电力电容使用环境中谐波问题越来突出，部分电力电容厂家根据这一趋势，推出一系列能抵抗不同程度谐波的电力电容，因此部分电力电容型号会有适用谐波等级的备注，例如：

　　With the development of production equipment automation, the harmonic problem in the use environment of power capacitors is becoming more and more prominent. According to this trend, some power capacitor manufacturers introduce a series of power capacitors that can resist different degrees of harmonics. Therefore, some power capacitor models will have remarks on the applicable harmonic level, such as:

　　适用于谐波电流畸变率THDI≤50%的工况环境。

　　It is suitable for harmonic current distortion rate THDi ≤ 50%.

　　常见电力电容规格

　　Common power capacitance specifications

　　电力电容规格会因型号不同有一定的区别，我们仍以CKKB440-20-3-G为例，详细介绍一下电力电容规格：

　　The specification of power capacitor will be different according to different models. Taking ckkb440-20-3-g as an example, we will introduce the power capacitor specification in detail

　　额定电压（Un）：440V

　　Rated voltage (UN): 440V

　　额定容量（Qn）：20Kvar

　　Rated capacity (QN): 20kvar

　　根据电容器型号以及额定电压与额定容量，通过查询CKKB电力电容参数表，可知

　　According to the capacitor model, rated voltage and rated capacity, through the query of ckkb power capacitance parameter table, it is known that

　　额定电流（In）：26.2A

　　Rated current (in): 26.2a

　　额定电容（Cn）：329.0μF

　　Rated capacitance (CN): 329.0 μ f

　　电容器外形尺寸（φD*H）:116*250

　　Overall dimension of capacitor (φ d * h): 116 * 250

　　根据国标要求，为了保证电力电容正常运行，需要有1.1倍的过电压以及1.43倍的过电流能力，即电力电容允许过电压为：

　　According to the requirements of national standard, in order to ensure the normal operation of power capacitor, it is necessary to have 1.1 times of overvoltage and 1.43 times of over-current capacity

　　额定电压*1.1=440*1.1=484V

　　Rated voltage * 1.1 = 440 * 1.1 = 484v

　　电力电容允许过电流为

　　The allowable over current of power capacitor is

　　额定电流*1.43=26.2*1.43=37.466A

　　Rated current * 1.43 = 26.2 * 1.43 = 37.466a

　　部分电力电容厂商考虑到客户使用环境复杂，为电力电容设计了1.3倍的过电压能力，即电力电容允许过电压为：

　　Considering the complex service environment of customers, some power capacitor manufacturers have designed 1.3 times over-voltage capability for power capacitor, that is, the allowable overvoltage of power capacitor is:

　　额定电压*1.3=440*1.3=572V

　　Rated voltage * 1.3 = 440 * 1.3 = 572v