... power transfer 23• electrical isolation: for service purposes an isolating transformer, pos-itioned between the mains supply and any equipment being worked on, will avoid electrical shocks ... measure the total voltage VЈand compare it with VЈR ϩ VЈC.Practical 26.28 Electronic and electrical servicingThe reason why the component voltages in a complex circuit do not add up to ... express them by two algebraic formulae:ZXX R XXRLC LCϭϪϩ ϭϪ() )/22and tan (ϕ10 Electronic and electrical servicingwhere Z ϭ total impedance, XL ϭ inductive reactance, XC ϭ capacitive react-ance,...