Incomer sizing calculation for a 3phase 4 wire 415V 50Hz switchboard

Dear All, I am looking for a incomer circuit breaker rating calculation of a LV switchboard. The outgoing feeders with current rating are 1. 125A 2. 160A 3. 160A 4. 125A 5. 125A 6. 80A 7. 160A 8. 80A 9. 80A 10. 80A How much should be the incomer rating? All these outgoing feeders are po

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