Site inspection and maintenance are essential activities in ensuring the smooth operation of electrical systems. This involves conducting thorough inspections at the site, identifying potential issues, and performing necessary maintenance tasks. Electrical testing plays a crucial role in this process, as it helps assess the condition of electrical components and identify any faults or abnormalities. One specific aspect of maintenance is SF6 gas analyzation, which involves analyzing the quality and purity of the SF6 gas used in electrical equipment. Leak tests are also conducted to detect any leakage of the SF6 gas, as it is a potent greenhouse gas and needs to be carefully contained. Circuit breaker (CB) timing tests are performed to verify the precise operation and coordination of circuit breakers within the electrical system. Contact resistance checking ensures that electrical contacts are functioning properly, reducing the risk of overheating or failure. In situations where SF6 gas requires special attention, engineers may employ innovative filtering solutions to ensure the gas’s optimal condition and extend equipment lifespan. Finally, emergency repair services are provided to promptly address any unexpected issues that may arise, minimizing downtime and ensuring the continuity of operations.