Kohler 20RESC Інструкція з монтажу та експлуатації - Сторінка 20
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Generator Management will start the second generator
and run it for at least 5 minutes if it senses any of the
following:
The running generator fails (disconnects from the
D
paralleling bus).
A load is shed.
D
Generator Management stops generators based on the
Automatic Stop Minimum Percent Load (Automatic
Stop) parameter and the load on the system. The
Automatic Stop setting is adjustable using SiteTech.
The time before a generator is started or stopped
depends on the difference between the maximum or
minimum load setting and the load on the system.
Lower loads result in quicker stopping and slower
D
starting of a generator.
Higher loads result in slower stopping and quicker
D
starting of a generator.
The effect of the load on the start and stop times is
illustrated in Figure 19 and Figure 20.
The generators will soft-unload when stopped by
generator management. This means that the controller
slowly closes the throttle and decreases the target
voltage of one of the generators until it has minimal
current flowing through the paralleling contactor. Then
the controller will open the contactor, resulting in a
smooth load acceptance by the other generator (no
sudden changes in load).
Generator Management Settings
The parameters used for generator management are
shown in Figure 21.
The Automatic Stop Minimum Percent Load Delay is
D
the time, in seconds, that the generator will take to
stop if the load is 10% below the Automatic Stop
Minimum Percent Load.
The Start Delay is the time, in seconds, that the
D
generator will take to start if the load is 10% above the
Automatic Start level.
Generator Management Parameter
Automatic Stop Minimum Percent Load (Automatic Stop) *
Automatic Stop Minimum Load Delay (Stop Time Delay)
Automatic Start
Start Delay
* See Notes About Load Shed Settings.
Figure 21 APM Generator Management Settings
20
Notes about Load Shed Settings
Compare the APM settings to the settings on the load
management device.
Set the Generator Overload Percent setting on the
D
load management device at least 20% higher than the
APM Automatic Stop Minimum Percent Load setting.
Set the generator Maximum Percent Capacity on the
D
load management device higher than the APM
Automatic Stop Minimum Percent Load setting.
Figure 19 Start Time vs. Load
Figure 20 Stop Time vs. Load
Default
20%
180 seconds (3 min.)
Automatic Stop + 20%
Stop Time Delay/10
Maximum Setting
65%
3600 seconds (1 hr.)
TT-1596
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