TV. , (5 100 ).
. .
(. 6.1): , ( ).
. 6.1, , ( 2). () I 2 ((1)) ((1,1)), 3 I 0 = IA + IB + IC, 4. , , , , , . 110 220 .
(U 110 ) , .. . (U 35 ), , ( ).
( ) . ((3)), . 3. , ; .
, ; . , , - Y/Δ Y/Y. .
K = I p / I 2,
I p ; I 2 .
K = 1, K = , K - .