GB/T 34940.3-2017

This standard specifies the methods for determining performance and test requirements for static transfer systems (STS), which are used to automatically switch critical loads between two independent power sources without interruption. It is applied in industries requiring high-reliability power supply, such as data centers, telecommunications, and industrial process control, where STS equipment must be tested for voltage transfer time, overload capacity, and environmental resilience. The standard ensures consistent evaluation of STS performance under specified conditions, guiding both manufacturers in design validation and users in procurement and acceptance testing.