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How are the fuse sizes calculated that are listed in the VD0C06S304C users manual in the spare parts section for example because they don`t appear to be an appropriate size and think should be be a lower rated fuse.<br />

The fuses recommended in the VD0C06S304C users manual for the ATV66 drive are not selected based on the National Electric Code ( which is maximum current times 125 % ) to protect customer wiring, but are selected for proper system coordination. These fuses are selected based on available fault current of 65KAIC.

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