This standard specifies the basic technical requirements and the test and acceptance requirements for the electro-hydraulic regulating system and unit of hydraulic turbines.
This standard is applicable to the design, manufacture, installation, acceptance and operation of the electro-hydraulic regulating system and unit of hydraulic turbines with the service capacity being 3000N·m and above (not including those used for reversible and bi-directional hydraulic turbines).
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest editions of the normative documents referred to apply.
GB 150 "Steel Pressure Vessels"
GB/T 2681 "Colours of Insulated Conductors Used in Electrical Assembly Devices"
GB/T 2682 "Complete Sets of Equipment in the Electric Lights and Button Color"
GB/T 3047.1 "Series of Basic Dimensions of Panels, Rack and Cabinets for Vertical Increment of 20mm"
GB/T 5465.2 "Graphical Symbols for Use on Electrical Equipment"
GB/T 7159 "General Rules for the Formulation of Letter Symbols in Electrotechnology"
GB 11120 "Turbine Oils L-TSA"
GB 13384 "General Specifications for Packing of Mechanical and Electrical Product"
DL/T 496 "Regulating and Testing Guide of Electro-hydraulic Regulating System and Device for Hydraulic Turbine"
JB 911 "Electric Clearance and Leakage Length of Low Voltage Apparatus for General Industrial Use"
JB 3136 "Specifications for the Assembling and Welding of Circuit Boards of Electrical Printing Devices for Power Installation"
3 Basic Technical Requirements
3.1 Applicable Conditions
3.1.1 The service capacities of electro-hydraulic governor and oil pressure unit shall be appropriate. The actual maximum opening of guide vane shall be more than 80% of the maximum stroke of the servomotor.
3.1.2 The hydraulic turbine generator unit shall meet the following requirements:
a) The hydraulic turbines operate under the conditions specified by the manufacturer;
b) The manufacture/installation quality of frequency measurement signal source and the water distributor, blade adjusting mechanism, nozzle needle, deflector organization, regulating shaft and feedback and drive mechanism of hydraulic turbines shall meet relevant requirements;
