Rich electric Invertek CombiPlus, User Manual

Page: 87 / 128

Rich Electric Co. “CombiPlus” User Manual V7.19 Copyright 2009
Page 87
C1-05: Power Support Select
Main Menu>Programming>ENT>Inverter>ENT
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Using this constant C1-05, the Power Support feature can be enabled or disabled. Use Power
Support to prevent an external circuit breaker to trip when the load on the CombiPlus® is too
high.
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If the load exceeds the AC IN Current Limit (B2-05), the CombiPlus® will start inverting and
will provide the extra current needed.
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Note: When Power Support is enabled. C1-05=1 (Initial setting), there is a minimum AC input
current limit of approximate 2-3 Amps. Setting a lower limit (B2-05) than this minimum value
will result in the minimum limit. (Note: In a parallel system, this limits per CombiPlus®!
Setting Function
C1-05=0 Power Support Function is disabled.
C1-05=1
(Initial setting)
Power Support Function is enabled.
C1-06: Power Support Level
Main Menu>Programming>ENT>Inverter>ENT
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This setting is a special setting for power Support mode when the CombiPlus® is charging and
due to a sudden load, the AC IN current exceeds the AC IN Current Limit (B2-05), the
CombiPlus® will switch to power Support mode (when C1-05=1)
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At that moment, the current need is unknown. The CombiPlus® makes an assumption of the
magnitude of this current. This assumption is equal to AC IN Current Limit (B2-05) multiplied
by this Power Support Level (C1-06). The default factor is two.
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This will prevent the circuit breaker from tripping because current provided by the INVERTER
minus the current drawn by the load is always lower than the rating of the circuit breaker.
This happens, of course, when the AC IN Current Limit (B2-05) is correctly adjusted to the
circuit breaker.
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If for instance in a generator application, the circuit breaker has a higher value than the AC IN
Current Limit (B2-05) (Normal load of generator is lower than maximum peak load) and one
knows that the load which is switched on always draws a certain current, one can consider to
increase this factor (C1-06) to achieve better results with sudden load changes.