The TN23-B2.30 is a combination remote electrical and/or manual start transfer switch manufactured by Teko. It is designed for single-phase, three-wire systems with voltage ratings of 240 volts from a power source, and is UL 1008 listed for standard duty use. The unit is equipped with two main circuit breakers, one manual and the other an automatic transfer switch. The main circuit breakers are connected in parallel, allowing both the manual and automatic transfer switch to control the same circuit. The manual transfer switch is rated for 30 amps, while the automatic transfer switch is rated for 60 amps. Both switches feature a time delay for closing, a short delay for pickup, and a typical trip time of 30-45 seconds. It is a single pole, double throw (SPDT) switch, meaning it operates in a single-throw, single-break sequence. This means that when the button is pressed, one breaker is opened while the other is closed.