Manual 37240C GCP-30 Series - Genset Control
Start-Up Synchronization / Unexcited Start-Up
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It may be necessary for systems with high consumer load to couple multiple gensets for emergency power opera-
tion. The start-up synchronization allows to couple the gensets much more quickly than the classical synchroni-
zation.
However, the gensets must be unexcited before they are paralleled.
The GCP-30 has no automatic start-up synchronization, because the proceeding depends on the respective appli-
cation.
The following description explains, which standard functions of the GCP-30 may be used to realize a start-up
synchronization.
A separate busbar for the gensets must be present for an operation with start-up synchronization. In addition, a
generator group breaker (GGB) for disconnecting the generator busbar and consumer load busbar is required.
Moreover, an MPU or an external speed governor with connection to terminal 62 (Firing speed reached) at the
GCP-30 must be present.
The process of the start-up synchronization must be controlled externally (e.g. via a PLC).
The PLC may read states like e.g. engine is running, from the GCP-30 via the CAN bus or relay manager output
and process this data.
G
Engine
Engine
Engine
G G
AVR AVR AVR
Load
Mains
Breaker command MCB
Breaker command generator
group breaker
Breaker command GCB Breaker command GCB Breaker command GCB
Excitation Excitation Excitation
Start Start Start
Reply GCB (Term. 4)
Relay manager information
Reply GCB (Term. 4)
Start (Term. 3/5)
Start (Term. 3/5)
Start (Term. 3/5)
Idle Mode (Term. 70)
Idle Mode (Term. 70)
Idle Mode (Term. 70)
© Woodward Page 35/38
CAN BUS
Reply GCB (Term. 4)
Relay manager information
Relay manager information
PLC
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