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5. Electrical Connections
38
5.7 Grid Switch Box Connection between Grid and
System
CAUTION
When it is required to check the ESS system and its connected load, make
sure that the Grid is disconnected.
Power is supplied to the Grid Switch Box from Grid upon any failure in the ESS system.
Normal indicates that the power for the load is supplied via the ESS system.
During
1. ordinary times,
2. power outage (when the ESS system is in normal status),
3. and normal status after finishing the quality inspection of the product,
set it to Normal to supply power to the load via the ESS system.
In case of failure in the ESS system, power must be supplied from Grid by Bypass.
When power outage happens, it is changed to the stand-alone mode within 30 seconds to
supply power to the load.
When the elapsed time is over 30 seconds after power outage but power is not supplied to
the load, it is caused by the ESS system failure.
1. Upon no PV power generation,
2. full battery discharge,
3. and ESS system failure,
it must be changed to Bypass to supply power to the load upon restoration from power
outage.