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4. If present, turn to the OFF position (open) the
parallel system “Main External Output
Isolator” or open the external output fuses.
5. Turn to the OFF position (open) the battery
breakers present on all frames and external
battery cabinets or racks breakers or fuses.
6. Turn to the OFF position (open) the input
mains switches/fuses (bypass and rectifier
switches/fuses in case of dual input feed
configuration) in the building distribution
panel.
7. Wait at least five minutes until the modules
AC and DC capacitors are completely
discharged!
The DPA 250S4 is now voltage free