Question

Problem #1 A multi-ratio current transformer with the following ratios (1200:5, 1000/5, and 800:5) high permeability silicon steel has a cross sectional area of 3.5 square-inches and a secondary resistance winding of 0.29 Ohms. The maximum current for which the transformer will operate is 35kA at 60 Hz. The relay burden including the leads is 2.2 Ohms. Using the formula method determine if the CT will saturate at the three given rations (CT saturation density)

Answer 1

mla Me hd provides aaete dala fos enalit For muila Me this methed isbdb faluingejis Zetandary inding Tmpedama dro 1200 15a 240 s363. 1251 maX.ㅡㅡ 36 3.135 aと--

meabi t luelu 0 ii)--100015- - 200 e 17 -435.75 v 35.75 4 冫マ357a5 1in1 3 75 た 4.6875 v Bmax = 368430 dinn Is