Effective value calculation:

u=(u0×u0+u 1×u 1+u2×u2+…)^( 1/2)

U0, U 1… should take valid values.

U0 is the DC component, and U0= 16.

U 1=(25√2)÷√2=25

Similarly, U2=4

U3=√3

Substitute U=30V.

i=(i0×i0+i 1×i 1+i2×i2+…)^( 1/2)

i=(i0×i0+i 1×i 1+i2×i2+…)^( 1/2)

=(3×3+ 10× 10+4×2+2×2…)^( 1/2)

=( 12 1)^( 1/2)= 1 1a。