Maintenance of Distribution Transformers

he maintenance of distribution transformers is essential to ensure their efficient operation and longevity. Regular visual inspections should be conducted to check for oil leaks, damage, and proper connections. Oil levels must be monitored, and oil quality tests, like dielectric strength and dissolved gas analysis (DGA), should be performed to detect potential internal issues. Bushings should be inspected for cracks or contamination, while the cooling system, including radiators and fans, must be checked for proper functioning. Electrical testing, such as insulation resistance and turns ratio tests, helps identify faults in windings or connections. Additionally, protection relays and grounding systems should be tested periodically to ensure safety and reliability. Regular load monitoring and detailed record-keeping are crucial for identifying patterns that may indicate wear or potential failure.