DL/T 5175-2003 in English

This specification has prescribed the design methods and principles for analog quantity control, switching value control and equipment selection of thermal control system for thermal power plant.
This specification is applicable to the design of thermal control system for newly-constructed or extended condense-type thermal power plants with unit plant capacity from 125MW to 600MW and for high-pressure, high-temperature power plants equipped with heat supply unit plant. The reconstruction design for power plants equipped with the above unit plant may refer to this specification. With local conditions of the supplier or buyer considered, the design for foreign project may also refer to this specification.

Foreword
1 Scope
2 Normative References
3 General Provisions
4 General Requirements
5 Analog Quantity Control
5.1 Analog Quantity Control Function
5.2 Items of Analog Quantity Control
5.3 Remote Operation of Analog Quantity
6 Switching Value Control
6.1 Switching Value Control Function
6.2 Sequence Control
6.3 Interlocking
6.4 Remote Control
7 Equipment Selection
7.1 General Provisions
7.2 The Selection of Conventional Equipment
Annex A