The transformer requires less care compared with other electrical equipment. The degree of maintenance and necessary inspection for its operation depends on its capacity, on the importance within electrical system, the place of installation within the system, on the weather conditions, and the general operating conditions.
The document serves as a user's guide for the operation and maintenance of ABB 1ZCL000002EG power transformers. It outlines that the degree of required maintenance depends on capacity, system importance, installation location, weather conditions, and general operating conditions.
Key sections include preventive maintenance programs, periodic inspection schedules (e.g., thermometers annually, conservators every five years), specific procedures for insulating oil deterioration prevention, and detailed instructions for inspecting bushings, cooling equipment, thermometers, Buchholz relays, overpressure valves, silica gel breathers, and gaskets. It also covers how to detect leaks and internal defects.
| Maximum oil temperature (ANSI) | 90°C |
|---|---|
| Maximum hottest point temperature (ANSI) | 110°C |
Thermometers should be inspected once per year to verify their operation.
The conservator must be inspected once every five years, or when a sharp change in insulation resistance is noted.
The oil breakdown value must be tested once per year.