Synchronization Gcb/Mcb - Woodward easYgen-2000 Series User Manual

Configuration
Configure Application > Configure Breakers > Synchronization GCB/MCB
Dead Busbar Negotiation
4.5.1.2

Synchronization GCB/MCB

192
The MCB has been open for at least the time configured in
n
"Transfer time GCB↔MCB" (parameter
(Mode with open transition mode only)
The busbar voltage is below the dead bus detection limit
n
(parameter 5820 Ä p.
There is no other GCB closed in the same segment
n
There is no other device with a smaller device ID willing to
n
close its GCB too (Dead busbar closure negotiation)
Each easYgen, who intends to close its GCB on a dead busbar
publishes a "Dead busbar closure request" flag over CANbus and
reads back whether there is any other easYgen publishing the
same intension:
If not, the unit waits an estimated time for security and then closes
its breaker.
If yes, the unit compares its own device number with the smallest
device number of all others who also intend to close. If the own
device number is smaller than the rest, the unit will close its
breaker - otherwise it blocks its own closure.
The easYgen removes its wish to close its GCB on a dead busbar,
if the GCB closure failure occurs in a multiple generator applica‐
tion. So the next easYgen with the higher device number gets the
permission for closure.
The load sharing messages are monitored. In case of a "missing
member" alarm on the load share bus, the single dead bus clo‐
sures are delayed depending on the own Generator number to
avoid simultaneous closure. The delay time is Generator Number
multiplied with 500 ms.
The dead busbar negotiation is going over segments.
The following applies to application modes
.
The synchronization is active, if the following conditions are met
simultaneously.
The display indicates "Synchronization GCB" or "Synchronization
MCB".
Automatic operation
The operating mode AUTOMATIC has been selected
n
The mains voltage is available and within the configured oper‐
n
Ä Chapter 4.4.2.1 "Mains Operating Voltage / Fre‐
ating range (
quency" on page 136 )
The generator and busbar voltage are available and within the
n
configured operating range (
Operating Voltage / Frequency" on page 107 )
The differential frequency/voltage is within the configured oper‐
n
ating range
easYgen-2200/2500 | Genset Control
3400 Ä p.
201)
Ä Chapter 4.4.1.1 " Generator
201)
and
37535B