Surge arresters play a crucial role in protecting electrical systems against overvoltages caused by lightning strikes or switching operations. Proper maintenance of surge arresters is essential to ensure their effectiveness and reliability. Maintenance activities include visual inspections to check for physical damage or contamination, as well as electrical tests to verify insulation resistance and leakage current. Surge arresters should also be replaced periodically according to manufacturer recommendations or industry standards to maintain optimal performance. By implementing a preventive maintenance plan for surge arresters, utilities and industries can mitigate the risks of equipment damage and downtime due to transient overvoltages, ensuring the continuous operation of their electrical systems.