Woodward GCP-30 Series - Table 3-5: Limit Values Generator, Dead Bus Start

Manual 37278B GCP-30 Series - Genset Control
© Woodward Page 65/174
Dead Bus Start
Dead bus start of the GCB
The GCB will be closed without synchronization if the following conditions are met simultaneously:
Automatic mode
• The operation mode AUTOMATIC has been selected
• No class F2 or F3 alarms are present
• The Parameter 145 "GCB dead bus start" has been configured to "ON"
•
The busbar has not been energized (the control measures no voltage)
• The engine is running, and the generator voltage and frequency are within the permissible limits
• The discrete input "Reply: MCB is open" has been enabled (the MCB is open)
• If load is shared via the CAN bus
- No GCB may be closed if the configured system is isolated operation in parallel with other generators
- The generator with the lowest control/generator number (Parameter 4) will be the first to close its GCB
Manual mode
•
The operation mode MANUAL has been selected
• No class F2 or F3 alarms are present
• The busbar has not been energized (the control measures no voltage)
• The engine is running, and the generator voltage and frequency are within the permissible limits
• The discrete input "Reply: MCB is open" has been enabled (the MCB is open)
• If load is shared via the CAN bus
- No GCB may be closed if the configured system is isolated operation in parallel with other generators
- The generator with the lowest control/generator number (Parameter 4) will be the first to close its GCB)
•
The push-button "GCB ON" has been pressed
Disabled generator monitoring:
If the generator monitoring for over-/undervoltage (Parameter 201) or over-/underfrequency (Parameter 195) is
d
isabled, the internally defined limit values are used.
Generator monitors Voltage Frequency
ON Monitor values Monitor values
OFF V
Gen
< 75 % V
RatedSystem
V
Gen
> 115 % V
RatedS
y
ste
m
f
Gen
< 80 % f
RatedSystem
f
Gen
> 110 % f
RatedS
y
ste
m
Table 3-5: Limit values generator, dead bus start
The permissible limits refer to the respective rated values in the system, i.e. the rated system voltage, configured
in Parameter 23, and the rated system frequency, configured in Parameter 11.