Look at the figure. There is a scheme of a single-phase circuit with 2 nodes:

IK1M 5.000 A, cosfk1m%30,75 Ik1m= 3.000 A, cosfk1m%-0,85 #1 Q Id Cable: IZ=30 A #2 IkIM= 500 A, cosfkim-1 Ikim= 250 A, cosfk1m-1 LOAD IB=16 A Look at the figure. There is a scheme of a single phase circuit with 2 nodes: #1 and #2. Maximum and minimum single-phase short circuit (kIM, klm) are represented for cach node. Consider: The design current of the load IB-16 A The maximum permissible current for the cable IZ-30 A Size the circuit breaker. IN-32A, curve C, Icu 6000A IN-20A, curve C, Icu-4500A IN-20A, curve C, Icu-6000A IN-15A, curve C, Icu 6000A IN 20A, curve D, Icu6000A