Ir
2h/In≤63A:1h
2
(2Ir) t1(1.2Ir1≤I<Ir2)
2
2
Ir2≤I≤1.5Ir2 I T2=(1.5Ir2) t2
1.5Ir2≤I≤Ir3
Ir3 Ir1 Ir3 (4 6 7 8 9 10 11 12 14 )Ir1
I≤0.8Ir3 I≥1.2Ir3
Ir
2h/In≤63A:1h
(2Ir) t1(1.2Ir1≤I<Ir2)
2
2
2
Ir2≤I≤1.5Ir2 I T2=(1.5Ir2) t2
1.5Ir2≤I≤Ir3
Ir3 Ir1 Ir3 (4 6 7 8 9 10 11 12 14 )Ir1
I≤0.8Ir3 I≥1.2Ir3