C1____________100nF 63V Polyester or Ceramic Capacitor

D1_____________Red LED (any type)

IC1____________4017 Decade counter with 10 decoded outputs IC

P1_____________SPST Pushbutton

B1_____________3V Battery (two 1.5V AA or AAA cells in series etc.)

Sensing probe__3 to 15 cm. long, stiff insulated piece of wire

Preliminary results, based on experimental research in the laboratory and numerical study on the detection of fault lines live in high-voltage composite insulator is depicted conducting the proposed method is based on the E-field of non-invasive sensing Using pigtail electro-optic (EO) and compact single-ended probe. Measurement and numerical simulation of FEM CALCULATIONS were made on the stalled clean 28 kV polymer insulators on defects of different size and conductivity were modeled. Based on modeling the optimal location and orientation of the EO outlined shows the conduction defect length and position. Laboratory tests conducted to verify these results and showed the effectiveness of a new method of detection. The results of the experiment have shown that evidence, EO Use optimal orientation, E-field sensor for the detection and localization of defect which is as short as possible to 15 mm × 1 mm in contact with the OWNER of the electrode and 26 mm × 2 mm between the barns. In addition, experimental tests demonstrated the ability of the sensor to detect the presence of EO Corona caused by conductive defects.