DBT12/15/24 Operations Manual....46
In Two Singles mode the Paralleling Master does the following:
Displays the operating mode: 2SINGLES.
Allows the Slave DBT units to run autonomously (Single operation), selecting the gain.
Does NOT connect the two ship buses together. The available power on each ship bus is that
of one Slave DBT.
If one Slave DBT is turned OFF, loses power or detects a fault, and the Paralleling Master still has
power, the Trident System will go to Slave 1 or Slave 2 mode.
7.4.4. Slave 1 or Slave 2 Modes
The Trident System operates in these modes if any of the following conditions are present:
Only one shore cord has power and the Paralleling Master is powered from it.
Only one Slave DBT is turned ON.
One Slave DBT has detected a fault.
In Slave 1 or Slave 2 modes the Paralleling Master does the following:
Displays an operating mode of SLAVE1 or SLAVE2.
Allows the powered Slave DBT to run autonomously (Single operation), selecting the gain.
Prevents the unpowered Slave DBT from coming on-line unexpectedly.
Connects the two ship buses together so that they both have power. The available power is
that of only one Slave DBT.
If the currently active Slave DBT is turned OFF, the Trident System will go to Standby mode.
If the currently active shore cord loses power, all units will turn off.
If the previously inactive Slave DBT is powered up or exits the fault state, the Trident System will
go to either Parallel or Two Singles mode, according to the phasing of the two shore cords.
7.4.5. Standby Mode
The Trident System operates in this mode if the Paralleling Master is powered up but both Slave
DBT units are either not turned ON or are in a fault state. In this mode the Paralleling Master:
Displays an operating mode of OK.
Waits for a Slave DBT to be powered up or exit the fault state.
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