10.5.6 SG-DG max. parallel time
This alarm limits the time that a shaft generator may run in parallel to a genset.
The timer starts when the genset or emergency genset is connected to the same
busbar as the shaft generator.
Controller type: SHAFT generator controller only.
G
G
The alarm can be configured under
Configuration > Parameters > Local power management > Parallel timers
. This alarm is
inhibited by
Power take home active
. The action is
Trip shaft generator breaker
,
Latch enabled
.
Table 10.20
SG-DG max. parallel time parameters
Parameter
Range
Default
Delay
0.1 s to 1 h
3 min
Enable
Not enabled, Enabled
Enabled
More information
See
GENSET controller
,
GENSET controller protections
,
DG-SG max. parallel time
for the alarm in the GENSET
controller that trips the generator breaker.
10.5.7 SG-SG max. parallel time
DANGER!
Connecting two running shaft generators can release a large amount of energy. This can kill people and destroy
equipment.
This alarm sets the maximum time that a shaft generator may run in parallel to a
shaft generator.
The power management system normally prevents two shaft generators from
connecting in the same section. This alarm is a safety feature, since it is possible to
for an operator to manually connect two shaft generators. This can occur if the
second shaft generator's breaker is closed manually, or if the tie breaker between
the two sections is closed manually.
This alarm is activated when two shaft generators are connected to the same
busbar for longer than the delay time. The alarm delay timer starts when the
second shaft generator is connected.
G
G
The alarm has a delay of 0.1 s. The alarm is always enabled. The alarm action is
Trip shaft generator breaker
,
Latch enabled
. The
alarm parameters are not visible in PICUS.
The alarm is inhibited in the SHAFT generator controller if
Power take home active
is activated.
INFO
To prevent a blackout, only the SHAFT generator controller with the highest
Controller ID
trips its breaker.
DESIGNER'S HANDBOOK 4189340911K UK
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