Transfer switches: Which configuration is best?

When it comes to picking the right transfer switch for a facility, engineers need to consider many aspects such as system installation, operation modes, and switching mechanisms to help prevent downtime in the event of a power outage. [...]engineers need to understand the configurations available to determine what is correct for the application's needs when implementing transfer switch technology. Open in-phase transition With open in-phase transitions, an automatic controller uses built-in intelligence to execute an open transition at the precise moment it expects the normal and emergency power sources to be synchronized in phase, voltage, and frequency. Closed transition A closed transition is a "make before break" transfer, meaning the transfer switch makes a connection to the new power source before breaking its connection to the old one. Because there is no gap between disconnection and connection, downstream loads receive continuous power throughout the transfer process.