Battery cabinet power supply mode

When there is a power outage or some disturbance in the utility, the UPS modules automatically switch to Battery mode. In Battery mode, the battery supplies power to the critical load as in normal UPS system operation. The only difference is that the critical bus in the parallel cabinet is the AC output.

STS can complete power switching within milliseconds to ensure the continuity and reliability of power supply. In the design of energy storage cabinets, STS is usually used in the following scenarios: Power switching: When the power grid loses power or fails, quickly switch to the energy storage system to provide power.

As the system is in Normal mode, the MOBs are closed and clean power is routed directly to the AC output of the parallel cabinet and then to supply the critical load. In Battery mode, the battery cabinet supplies DC power, which maintains UPS operation. The battery supports the critical load through the parallel cabinet's AC output.

Lithium batteries have become the most commonly used battery type in modern energy storage cabinets due to their high energy density, long life, low self-discharge rate and fast charge and discharge speed.

There are three operation modes in this system: In Normal mode, the UPS system functions normally as described in the PowerwareR 9315 Operation manual provided with the UPS system. In the parallel redundant system, power leaves the UPS module from its AC output and is routed into the designated MOB in the parallel cabinet.

Refer to the Powerware 9315 Installation manual provided with the UPS system for input feeds to the UPS module. Each UPS module must be wired to its corresponding module output breaker in the cabinet with power cables sufficient for carrying the load. Recommended wiring size is listed in Tables A---3 and A---4 of Appendix A of this manual.