Oil Inlet Gear Pump
A positive displacement pump sucks the oil from the transformer / storage tank and delivers it to the conditioning machine. A built in relief valve takes care of any excessive pressure rise.
The oil heater heats the transformer oil to the required set temperature. It is provided with electrical resistance elements enclosed in MS tubes separating them from oil. Digital temperature controllers are provided for controlling the temperature. Further a pre-set safety thermostat is provided to prevent accidental rise in pressure over the desired level. Suitable baffles in the heater vessel prevent hotspots.
Filtering is achieved by means of Non-hygroscopic, high efficiency imported filter cartridges. The filter medium is progressively denser in the direction of flow. This unique feature ensures large dust holding capacity. The filter housing is designed for easy replacement of choked cartridges and the compound gauge on the housing indicates the differential pressure developed due to the condition of the cartridges.
The optimally designed (single/double stage) chamber consists of columns of raschig rings to ensure maximum exposure of oil to high vacuum, which causes moisture and gases to evaporate. Suitable vacuum pumping system of sufficient throughput capacity (rotary, roots vacuum pump) ensures low vacuum. The flow of oil is indicated through the sight glass provided on the chamber.
Outlet Glandless Centrifugal Pump
A centrifugal glandless pump draws out the conditioned oil from the degassing chamber. This glandless feature ensures total isolation of the conditioned oil from the atmosphere and is essential for maintaining the quality of the conditioned oil.
Vacuum Pumping system of high throughput capacity is provided for evacuating the degassing chamber and is capable of achieving and sustaining a high degree of vacuum.
The machine has a fuseless control panel. The machine is equipped with a sturdy and easily accessible electrical control cabinet. A mimic diagram is installed on the cabinet, providing a continual display of the state of operation.