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Technology of Vacuum Pump Unit

April 25,2017.

VPS Vacuum Pump Unit is widely used in various types of large-scale transformer installation and maintenance for high-efficiency vacuum drying and vacuum oiling. Quick air pumping, energy consumption, LCD display, mobile and flexible features. The leakage rate of the unit is less than 1%, the vacuum system is equipped with anti-oil-back device and phase sequence automatic commutation system to prevent the vacuum pump from reversing.

VPS Vacuum Pump Unit adopts air-cooled German Leybold rotary vane vacuum pump and roots  pump, working vacuum is 50Pa and max working vacuum up to 10 Pa in the running, the ultimate vacuum is 1-3Pa. It has features of quick start, high pumping speed, stable performance, easy to operate.


Technical Performance

1. Applying for vacuum drying and vacuum measurement of transformers, tap changers, auxiliary switches and other electrical equipment

2. Cooling type: natural air-cooled. The vacuum pump exhaust port is provided with device for condensing and collecting moisture.

3. The control system has the perfect protection and alarm functions with phase sequence, phase, overvoltage, undervoltage, leakage detection and protection of all faults are the corresponding warning light prompt.

4. VPS Vacuum Pump Unit uses automatic control function, the roots pump automatically starts.

5. System settings Oil level detection devices: oil and gas separators, oil storage tanks and photoelectric switches on the transformer and vacuum pump protection, to prevent the oil pumped out by the vacuum pump. When the photoelectric switch detects the oil is pumped to the oil-gas separator, the system forced shutdown, suggesting that oil, troubleshooting, the system returned to normal.

5. Vacuum pump with self-check valve, vacuum pump interlock, in the power outage or vacuum pump stop automatically closed when the check valve, in addition to insurance in the exhaust port is also equipped with a vacuum solenoid valve, the vacuum or vacuum pump stop solenoid valve closed , To prevent any situation when the reverse vacuum pump oil into the GIS chamber, theoretically put an end to a major accident.

6. Electronic vacuum gauge and McGregor vacuum gauge are installed in the back of the total valve to facilitate the detection of the vacuum transformer, McNair vacuum gauge with the corresponding valve, do not have to shut.

7. Axial fan: rotary vane pump and Roots pump separation of water vapor and light oil for cooling, collection and emissions, to protect the vacuum pump oil from pollution, enhance the pumping capacity of the vacuum pump to improve the working vacuum. No increase in the pumping capacity of the case, whether it is oil or vacuum unit vacuum machine work greatly improved.

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