More than 100 international technical experts are active Working Group contributors advancing the writing of international standards and reports for hydraulic rotating machinery and associated equipment allied with hydro power development.

The status of ongoing work is available from the IEC/TC4 Secretariat and the IEC Web site. Additional information can be found at and

For further details, contact: Robert Arseneault, Secretary, IEC/TC 4, 485 Ravel, Brossard, Québec J4X 2M4, Canada. Tel: +1 450-444-3857 or +1 514-485-4211. Email:; or International Electrotechnical Commission (IEC), 3, rue de Varembé, PO Box 131, 1211 Geneva 20, Switzerland. Tel+ 41 22-9190211. Fax +41 22-9190300.