An electrical power system can be approved and approved by the system that is able to overcome electricity that arises both from inside the equipment (permanent damage) or factors from outside the equipment (temporary disruption) quickly, safely and selectively without having to use total outages. The purpose and research were to analyze the damage to the Power Breaker (PMT) due to Lightning Surge in the 150 kV Substation of Cikarang. This research method uses analysis by comparing the flow received by PMT with the termination capacity of PMT. This study succeeded in understanding the point of damage to the PMT when disconnecting more fault currents on the repaired lightning surges on the burnt PMT safety plate parts, thereby increasing leakage in the GAS SF6 as a fire arcing media.