DIN EN 50216-7 VDE 0532-216-7:2002-09

The document covers requirements for electric pumps with generate the circulation of insulating oil in transformers conforming to the EN 60067/HD 398 series and their associated cooling systems. The pumps covered in the document are rotodynamic pumps driven by a squirrel cage induction motor which is immersed in the insulating oil. Pump set conforming to the document my be of in-line or end suction design. The document includes requirements for the electrical and hydraulic performance, mechanical design, routine testing and type testing. Additionally, performance, mechanical design, routine testing and type testing. Additionally, performance and dimensions or preferred sizes of pump sets are specified.