Transformer vacuum oil filter maintenance plan

Transformer Vacuum Oil Purifier Maintenance Plan

To ensure the long-term stable operation of the transformer vacuum oil purifier, extend equipment life, and improve oil purification efficiency, a scientific plan for daily maintenance, regular maintenance, and inspections of key components is required.

Daily Maintenance (Before and After Each Use)

1. Pre-Operation Inspection

✅ Vacuum System

- Check the vacuum pump oil level (should be at the center of the sight glass) and check for turbidity or emulsification. ｒｅｐｌａｃｅ if necessary (ISO VG 100 vacuum pump oil is recommended).

- Test the vacuum level to ensure it meets the standard (generally ≤5 kPa absolute pressure).

✅ Heating System

- Verify that the heater is not short-circuited or open-circuited, and that the temperature controller is set appropriately (usually 40-65°C to prevent oil oxidation).

- Check the thermocouple for sensitivity.

✅ Filtration System

- Check the filter element/filter paper for blockage (ｒｅｐｌａｃｅ if the pressure differential exceeds 0.3 MPa).

- Verify that the inlet and outlet oil lines are free of leaks or blockages.

✅ Electrical Safety

- Check the power supply voltage (380V ± 10%) and grounding wire for reliability.

- Observe the motor and oil pump for any abnormal noise or overheating.

2. In-Operation Monitoring

? Parameter Recording

- Record vacuum, oil temperature, flow rate, pressure, and other data every hour. Adjust any abnormalities immediately.

- Observe the oil color and bubbles. If excessive foaming occurs, reduce the heating temperature or vacuum level.

? Abnormality Handling

- If an alarm (such as low vacuum or overload) occurs, troubleshoot according to the alarm code (refer to the equipment manual).

3. Post-Shutdown Maintenance

? Cleaning and Oil Draining

- Drain any residual oil from the oil filter to prevent solidification and clogging of the pipes.

- Clean the condenser and heat sink surfaces (using a lint-free cloth and alcohol).

- Check that all valves are tightly closed.

Deep Maintenance of Key Components

1. Vacuum Pump Maintenance

- Annual Disassembly and Cleaning: Remove carbon deposits from the pump chamber and inspect the vanes for wear (ｒｅｐｌａｃｅ if wear exceeds 0.1mm).

- Exhaust Filter Replacement: Prevent oil mist from contaminating the environment (ｒｅｐｌａｃｅ every 300 hours or if clogged).

2. Heater Descaling

- Circulate a 5% citric acid solution through the heating element to prevent scale from impairing heat conduction (applicable to water bath heating models).

3. Electrical System Inspection

- Tighten the wiring terminals to prevent loosening and sparking.

- Clean dust from the control cabinet and check the PLC or relay contacts.

Long-Term Maintenance

1. Drain the Oil Line: Flush thoroughly with clean oil to prevent residual oil from deteriorating and corroding the lines.

2. Moisture and Rust Prevention: Apply anti-rust oil to the surfaces of metal components such as the vacuum pump and motor and store in a dry environment. 3. Regularly power on the unit: Power it on once a month (run it at no load for 10 minutes) to protect electrical components from moisture.

Strictly following this protocol can reduce the failure rate by over 30%, ensure efficient and stable operation of the oil filter, and extend the life of the transformer oil. It is recommended to adjust detailed parameters based on the equipment manufacturer's manual.