Woodward easYgen-3000XT Series, Manual, Page: 264 / 1205

External Breaker
Handling Synchronizat‐
ion Mode Dead Bus
Closure Condition for the closure acceptance
GCB Synchronization Off -
• The start request in automatic is •
active
• The generator is in operating range •
• The engine start procedure is expired
•
GCB Dead bus closure - Off
MCB Synchronization Off - The mains is in operating range
GCB Dead bus closure - Off
4.4.3.1 Good to know: Actions with Breakers
4.4.3.1.1 Dead Bus Closing GCB
The following applies to application modes
A03
and
A04
.
The unit closes the GCB without synchronization, if the following conditions are met. The
display indicates "GCB dead bus close".
Automatic operation
• The operating mode AUTOMATIC has been selected •
• No class C alarm or higher is present •
• The engine is running •
• The engine delayed monitoring (parameter ╚═▷ 3315 ) as well as the generator •
stable time (parameter ╚═▷ 3415 ) have been expired or the LogicsManager function
"Undelay close GCB" (parameter ╚═▷ 12210 ) is enabled
• The generator voltage and frequency are within the configured operating range ( ╚═▷ •
“4.5.1.1 Generator Operating Ranges: Voltage / Frequency / Busbar” )
• The MCB has been opened for at least the time configured in "Transfer time •
GCB↔MCB" (parameter ╚═▷ 3400 )
(Mode
A04
with open transition mode only)
• The function "Start without load" (parameter ╚═▷ 12540 ) has been disabled through •
the LogicsManager
• Only in critical mode: the parameter "Close GCB in override" (parameter ╚═▷ 4100 ) •
is configured to "Yes"
• The busbar voltage is below the dead bus detection limit (parameter ╚═▷ 5820 ) •
• There is no other GCB closed in the same segment •
• There is no other device with a smaller device ID willing to close its GCB too (Dead •
busbar closure negotiation)
Manual operation
• The operating mode MANUAL has been selected. •
264 easYgen-3000XT Series B37574
4 Configuration
4.4.3.1 Good to know: Actions with Breakers
Released