The currents in the earth straps and secondary cable armouring are measured with specially designed wideband CTs. ... of the CT and v denotes the 3.2 SIGNAL CONDITIONING 3.2.1 Overview Figure 2 shows a block diagram of the signal conditioning hardware. ... Current circuitry. transducers and summation 3.2 .2 Current Transducer, Amplifier and Summation. ... I0E+0I 1 OE+02 I 0E+03 I OE +04 I 0E+O5 I.0E4O6 Frequency |Hz| Figure 3: Measured frequency and phase responsesanbsp;...