When the transfer la initiated to the TLC, the auxiliary breaker is tripped first and then the atart-up breaker is closed. The TLC will only allow an automatic transfer toward the start-up source. This automatic transfer can occur for a bus undervoltage condition (if this function is enabled) or for a protective relay initiated transfer via 86x/GEN.
2. In the start-up breaker trip circuit, the TLC trip output is in series with the cutoff switch and this combination is added in parallel with the existing trip functions. Everything else in the trip circuit remains as it was before the TLC.
3. The auxiliary breaker closing circuit is designed to allow a closure for the following conditions: (Refer to Figure 15).