Operating environment and working conditions:  

- Vessels are far from land;  

- Ambient temperature: -25 to 45°C, frequency: 50 to 60 Hz;  

- Relative humidity not exceeding 95%;  

- Influenced by condensation, salt spray, and mold;  

- Subject to vibrations and shocks generated during normal vessel operation;  

- Rolling angle during operation: 22.5°, tilt angle: 15°;  

- Used for lighting, power distribution, or grid isolation in vessels, offshore platforms, and other locations; marine lighting transformers are critical equipment.  

- High requirements for safety and reliability (protection level).  

- Execution Standard: CB/T 1001-92;  

- Two normal three-phase transformers: mutual backup.