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What is the purpose of BYPASS breaker in XW PDP?

The Bypass breaker allows the user to transfer the loads in parallel with the incoming AC, whether it be from grid or generator, effectively isolating 
the output side of the inverter. This is useful when troubleshooting or if the batteries are too severely discharged, the customer can have power to 
critical loads in BYPASS. An interlock must be in place that prevents BYPASS and inverter OUTPUT breakers from being energized simultaneously. 
If installed correctly, critical loads can have power in BYPASS assuming grid or generator is available. AC input breakers have no effect on the BYPASS 
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