4 Operating From a Personal Computer
56
Operation Guide Flatpack MCU,
351300.013, v8-2006-07
4.10.5 Current
Limit
Cfg
This function sets the maximum charging current of the batteries, to prevent an excess of available recharge current
from overcharging the batteries or tripping the protective battery breaker. This is a concern after a discharge event,
during the recharge cycle, before the loads are reconnected and full rectifier system current could be delivered to the
battery plant.
When charge current limitation is enabled the Flatpack MCU will maintain a current limited state by regulating the
charge voltage. If several battery strings are connected to the same system, the total charge current for all strings must
be used. Note that the Charge Current specifically applies to the battery current as monitored by the MCU, and will not
reduce the load current delivered by the rectifiers with fully charged batteries.
When the system is to be fed from a generator (see section 4.9.3) the charge current limitation allows for a separate
maximum charge current value to be set when one of the configurable inputs is configured to “Generator Input” and the
generator is running. “Slow Curr. Walk In Rise time” is used during generator start up.
Options:
Select
Deactivate
or
Activate
under
Charge Current Limitation.
The enable checkbox is common for both “Mains
Feed” and “Generator Feed” Charge Current Limitation.
Mains feed
•
Maximum charge current; The maximum charge current in systems without generator. Valid from 0 to 210A.
Default value is 0A.
Generator Feed
•
Maximum charge current; The maximum charge current in systems with generator. Valid from 0 to 210A. Default
value is 0A.
•
Slow Curr. Walk In Rise Time; The time from which the generator has started to when nominal voltage should be
reached. Valid from 0 to 60 seconds. Default value is 10 seconds.