Underground liquid gas tank insulation status test procedure measures rest potential to buried electrodes and currents to earthed auxiliary anode from tank and test plate

摘要

An underground liquid gas tank insulation status test procedure measures the rest potential between the tank (1) and earth electrodes (6a-c) above or beside the tank and measures the currents between an earthed auxiliary anode and the tank and a a test plate current. Independent claims are included for insulation status test equipment using the procedure.