NBN EN 61064 : 1994

Cooperating organizations
National foreword
Foreword
1 Scope and object
2 Normative reference
3 Terms, symbols, definitions and units
4 Guiding principles
4.1 Matters on which agreement shall be reached
4.2 Time of carrying out tests
4.3 Preparation for acceptance tests
4.4 Instruments
4.5 Test report
5 Speed governing system tests
5.1 Turbine at standstill
5.2 Turbine at no-load
5.2.1 Overview
5.2.2 Test procedure for determination of static
        characteristics
5.2.3 Determination of dead band
5.2.4 Speed range determination
5.2.5 Stability
5.3 Turbine on load
5.3.1 Overview
5.3.2 Test conditions
5.3.3 Load-steam flow demand relationship
5.3.4 Dead band determination - Overview
5.3.5 Dead band determination - Method 1
5.3.6 Dead band determination - Method 2
5.3.7 Determination of steady-state speed regulation -
        Method 1
5.3.8 Determination of steady-state speed regulation -
        Method 2
5.3.9 Determination of incremental speed regulation -
        Method 1
5.3.10 Determination of incremental speed regulation -
        Method 2
5.3.11 Stability
5.4 Dynamic tests of the speed governing system by
        sudden load rejection to no-load
5.4.1 Overview
5.4.2 Operating conditions
5.4.3 Test procedure
5.4.4 Test results
5.4.5 Stability
6 Overspeed protection system tests
6.1 Turbine at standstill
6.2 Turbine at no-load
6.3 Turbine on load
6.4 Dynamic testing of overspeed protection system
        by turbine trip from maximum load
6.4.1 Overview
6.4.2 Operating conditions
6.4.3 Test procedure
6.4.4 Test results
Annex
A General guidance
Figures
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Applies primarily to constant speed steam turbines driving a.c. generators at power stations, for testing speed control systems consisting of overspeed protection and speed governing systems. The acceptance tests of steam turbine speed governing and overspeed protection systems verify any criteria quoted in the manufacturer's guarantee. Coverage includes guiding principles, speed governing system tests, turbine on load, and overspeed protection system tests.