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Rich Electric Co. “CombiPlus” User Manual V7.19 Copyright 2009
Page 81
B2-09: AC IN Dynamic Power Shifting
Main Menu>Programming>ENT>General>ENT>Auto transfer Switch>ENT
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This setting is an expansion of the AC IN Current Limit (B2-05) mechanism.
Setting Function
B2-09=0
(Initial setting)
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The AC current limit is specified by the AC IN Current
Limit (B2-05) setting
B2-09=1
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The effective AC input current limit depends on the load
history. When the load is lower than the AC IN Current
Limit (B2-05), the effective AC input current limit is also
lower but slightly above the load.
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When the load increase, the effective current limit also
increases with a delay. The thought behind this is that when
a generator is running at a low load, it can’t switch to full
load immediately and it needs some time to increase the
power.
An example:
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We have a 2KVA generator.
We adjust the AC IN Current Limit (B2-05) setting to 8A and we enable Power Support
(C1-05=1). We have no load connected and the batteries are fully charged. Therefore, no current
from generator is drawn.
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At this moment, we connect a load of 7A to the CombiPlus® with this setting
(
B2-09) disabled,
the CombiPlus® would not react because the load is below the AC IN Current Limit (B2-05)
setting. The result is that the full load is connected to generator which will drop in voltage
because it can’t deliver that current instantly which could result in switching to INVERTER.
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If however we had this setting (Dynamic Power Shifting) enabled, the effective AC input
current limit would be far lower than 8A because the load was zero. So connecting a load of 7A
will result in CombiPlus® starting to power Support and no voltage drop is being examined on
the AC OUT. The generator starts to supply the load and the effective AC input current limit
will increase to 8A slowly. At the moment, the CombiPlus® will stop Power Support and the
full load is on the generator.
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This is powerful option in combination with Power Support but even without Power Support, it
can prevent unnecessary switching to INVERTER because the charge current will reduce when
AC input current becomes higher than the effective AC input current limit.
Содержание Invertek CombiPlus
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