科士达UPS电源就是按感性负载设计的，所以带感性负载是它的本分。一般科士达UPS逆变器输出端并联的电容器一方面起滤波作用，另一方面是抵消负载中的电感分量。如果负载时容性，又如何用电容去抵消电容性分量呢?只能使输出的电容分量加大，而这些电容分量的电流又必须由逆变器提供，使逆变器输出的有功分量减小，所以带载的能力就减弱了。

Costa UPS power supply is designed according to the inductive load, so with the inductive load is its duty.In general, the parallel capacitor at the output end of UPS inverter plays the role of filtering on the one hand and canceling the inductance component in the load on the other hand.If the load is time-tolerant, how can the capacitive components be offset by the capacitance?The capacitive components of the output can only be increased, and the current of these capacitive components must be provided by the inverter, so that the active component of the inverter output decreases, so the carrying capacity is weakened.