Breakers

SolraySolray Registered Users Posts: 246 ✭✭✭
in PV Installers Forum - NEC, Wiring, Installation #1
I was wondering if a 150 VDC breaker rated at 60 amps will work for a 48 volt system with 56.7 volts maximum and still interrupt the circuit at 60 amps even though that is well below the rated voltage. Does it strictly trip at the amps rating or does that change as the voltage changes as long as you stay below the maximum voltage?"
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  • EstragonEstragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #2
    Yes, the breaker trips on current (amps) alone. The higher voltage rating on the breaker is fine.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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  • SolraySolray Registered Users Posts: 246 ✭✭✭
    #3
    Thank you. That is what I thought I remembered from years ago, but it's been a lot of years.
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