Circuit Breaker Rating(A) for DC Amps?

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Bird

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What is the 3 phase Circuit Breaker Rating (A) for 205A DC amps ?

My case:

I have 8 units of Power Supply ( 30A ) 240VAC step to 12VDC

and

128 units of 3.5" hard disk with ( 1.6A per unit )

1. 1 unit of power supply shared to 16 units of hard disk ( 12VDC )
2. 128 units of hard disk x 1.6A = 204.8A

Total : 205A (DC)

question:
How much is the Main Circuit Breaker size (A) (AC) should i apply?
 
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