Quasi-disruption of the discharge current has been occurred in an electrode discharge system. The discharge takes place between two T-shaped electrodes, a copper central cylindrical rod and a molybdenum cylindrical transverse rod. The capacitor bank used has 52 kJ. maximum stored energy, which consists of two capacitors 680tIF capacitance each, triggering spark gap system, micro processor control system, and the power supply. The discharge current was a fast rising single pulse one, with a peak value at 500 p, then it decayed exponentially in 7.5 ms. The peak discharge current increases linearly with the charging potential of the capacitor banks, which was 14 kA at 15 kV. The discharge current disruption starts early with the increasing of the capacitor bank charging voltage in a linear relation. This indicates that the diamagnetic effect of the plasma k the main source of such disruption.