内部“模块化”冗余N + 1配置
与在基准情况下所描述的一样，模块化的科士达UPS也可以通过添加额外的电源模块来提供N + 1冗余。参见下图3。这种内部模块化冗余N + 1配置与配备了额外的一个第五250千瓦模块的基准情况是一样的。电池系统由四个并联的电池组成，每个电池都有自己的断路器，所以在一个电池的故障不会导致整个电池系统的瘫痪。如该图所示，科士达UPS输出总线和电池(DC)总线是为所有的模块所通用的，因此它们代表了需要转换到环绕式旁路的科士达UPS系统的单点故障。
Modular Costa UPS can also provide N + 1 redundancy by adding additional power modules. See Figure 3 below. This internal modular redundancy N + 1 configuration is the same as the baseline with an additional 550 kW module. The battery system consists of four parallel batteries, each of which has its own circuit breaker, so a failure of one battery will not lead to the paralysis of the whole battery system. As shown in the figure, the Kosta UPS output bus and battery (DC) bus are common to all modules, so they represent a single point of failure of the Kosta UPS system that needs to be converted to a bypass.