Figure 8-4.--MIMIC panel.
center are the bus tie breakers (BTBs), These
are labeled BTB 1S-2S CLOSE/BTB 1S-2S
TRIP. The label identifies the location of
the BTBs. The first number is the SWBD
the breaker is located on and the second
number is the SWBD it will connect with.
T h e y work the same as the load center
breaker switches, except these switches control
the bus ties that connect the SWBD buses