DC Power Technologies FS3 Version 3 - Technical Hardware Manual - Manual (Page 28)

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Current Limiting
A current limit may be required where the mains supply or input
cable has reduced current capacity. Jumpers on the MPC controller
enable the limiting of input current drawn by the charger.
A charger with current limit applied causes the Charger Interface
software to reject any configuration requiring more current than the
set limit. The software will alert the operator to any configuration
exceeding the current limit during the Charger Interface charger
configuration stage.
A position combination of jumpers J119 and J120 will limit the input
current to 10A,15A or 30A depending on the current limit
requirements.
J119 and J120
current limiting
jumpers on the
MPC35
Default setting