Quote:
Originally Posted by etype2
I think your saying the inverter detected the fault before the fuse reacted to the fault? Would you care to speculate as to the cause?
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Condensed version of above explanation: Tslowblow_fuse_open>>Treal_time_load_monitoring_fa ult_open.
When the diode shorted it probably did so instantly and the load spiked above both devices rating instantly rather than slowly ramping.
If 2 safety devices in series are both instantly brought to fault input state whichever one has the faster reaction time will open regardless of actual current ratings of the individual devices and how extreme the fault is.
If you took the line 10A fuse from the Westinghouse and put it in series with a fixed resistive load that draws 20A and plugged that fused load into the 30A limited inverter the load would probably receive power for a humanly noticeable time period then 10A fuse would blow and the inverter would stay on. If you took 2 such load/fuse pairs wired them together and plugged the combined 40A load into the inverter then the inverter would probably trip first at a much faster speed.