Functions
5.1 Basic functions
3KC ATC6500 transfer control device
64 Manual, 05/2019, L1V30538268002A-01
A19 Auxiliary voltage failure The device that manages the draw of auxiliary voltage supply from one of the
available lines signals a failure or improper operation.
A20 Timeout tie breaker (TB) The tie breaker has not performed any opening or closing operation within the
set maximum period. Once the alarm has been triggered, the ON or OFF com-
mand is inhibited. The alarms are only triggered if at least one of the two energy
sources is available, that is to say it is above the programmed lower limits.
A21 Tie breaker
protection trip
The tie breaker has opened because an overcurrent protection device has
tripped. This is signaled by activation of the input with function Tie breaker pro-
A22 Tie breaker (TB) withdrawn The tie breaker has been withdrawn. This is signaled by activation of the input
with function Tie breaker withdrawn.
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