Instrumentation Techniques in High Voltage Substations - Part II Measuring Devices and Circuits

Resistance dividers, capacitance dividers, shunts, termination resistors, and multi-coupling devices have been developed to use with triaxial cable during EMI, LVI, and transient potential measurements. Arcing disconnects switches - back-to-back switching of shunt capacitor produce EMI voltages, intercept potential on fences and ground mat potential rise. Circuits used to measure these voltages and a method to measure ground mat surge impedance is summarized in this report.