Built last week in Zwickau: oil-cooled drives for substations

With the special design, the cooling medium is guided through the entire motor via special end shields. Thanks to this optimal cooling, the motors deliver significantly higher performance than motors with surface cooling.

Electric energy passes through several transmission and distribution networks on its way to the consumer. The necessary voltage levels are created in substations and transformer stations, which is done with the help of transformers in which oil cooling systems are used. During operation of the on-load tap changer in the transformer, the switching oil absorbs water. In addition, contamination occurs due to the burning of the switching contacts. Both can significantly affect the operational safety of the on-load tap changer and the transformer. The oil must be filtered and dried. For this purpose, motors are used as pump drives, which suck oil out of the on-load tap changer with every switching process, press it through a filter insert and feed the cleaned oil back into the switch.

The drives, developed by our designers, are used in difficult installation conditions, high ambient temperatures or in precision machines.