EN 50216-7 covers requirements for electric pumps which generate the circulation of insulating oil in transformers and reactors conforming to the EN 60076 series and their associated cooling systems. The pumps covered in this standard are rotodynamic pumps driven by a squirrel cage induction motor which is immersed in the insulating oil. Pump sets conforming to this standard may be of in-line or end suction design. This standard includes requirements for the electrical and hydrulic performance, mechanical design, routine testing and type testing. Additionally, performancy and dimensions of preferred sizes of pump sets are specified (see normative annexes A
DS/EN 50216-7:2002 history
2002DS/EN 50216-7:2002 Power transformer and reactor fittings - Part 7: Electric pumps for transformer oil