Manual 37278B GCP-30 Series - Genset Control
Page 66/174 © Woodward
Dead bus start of the MCB [GCP-32]
The MCB will close without synchronization if the following conditions are met simultaneously:
Automatic mode
• The operation mode AUTOMATIC has been selected
• The Parameter 149 "MCB dead bus start" has been configured to "ON"
•
The busbar is not been energized (the control measures no voltage)
• The mains voltage is present and within the permissible limits
• The discrete input "Reply: GCB is open" has been enabled (the GCB is open)
• The discrete input "Enable MCB" has been enabled
• If load is shared via the CAN bus
- No MCB 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 MCB
Manual mode
•
The operation mode MANUAL has been selected
• The busbar is not been energized (the control measures no voltage)
• The mains voltage is present and within the permissible limits
• The discrete input "Reply: GCB is open" has been enabled (the GCB is open)
• The discrete input "Enable MCB" has been enabled
• The push button "MCB ON" has been pressed
• If load is shared via the CAN bus
- No MCB 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 MCB
Operation mode STOP
•
If "Enable MCB" (terminal 53) has been enabled and "Switch MCB in stop mode" (Parameter 162) is confi-
g
ured "YES", the MCB will close when all generators are in STOP mode
Disabled mains monitoring:
If the mains monitoring for over-/undervoltage (Parameter 211) or over-/underfrequency (Parameter 206) is dis-
ab
led, the internally defined limit values are used.
Mains monitors Voltage Frequency
ON Monitor values Monitor values
OFF V
Mains
< 85 % V
RatedSystem
V
Mains
> 12.5 % V
RatedS
ste
f
Mains
< 90 % f
RatedSystem
f
Mains
> 110 % f
RatedS
ste
Table 3-6: Limit values mains, 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.