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SL 321-2005Fundamental technical specifications for large and medium hydrogenerators (English PDF)

大中型水轮发电机基本技术条件

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Issued by

Ministry of Water Resources of the People's Republic of China

Level / Type

National · Mandatory

Issue date

May 10, 2005

Implementation date

July 1, 2005

Scope

SL 321-2005 is the English-translated version of 大中型水轮发电机基本技术条件.

SL 321-2005 is the Chinese standard "Fundamental technical specifications for large and medium hydrogenerators". This standard applies to: the turbine is directly connected -3 phase 50Hz, rated capacity of 25MVA and above scroll salient pole synchronous generator (hereinafter referred to as hydro).

Rated capacity of 25MVA less scroll salient pole synchronous generator and the horizontal axis turbine generator can be implemented by reference. Issued on 2005-05-10, in force from 2005-07-01.

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Document preview — SL 321-2005

National Standard of the People's Republic of China

ICS: 27.140
Classification: K55

[Preview only]
1 General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3 Soil Erosion Type Division
3.1 Grade 1 Type Area
3.2 Grade II Type Area
3.3 Scope and Feature
4 Soil Erosion Intensity Graduation
4.1 INTENSITY GRADUATION OF WATER EROSION AND GRAVITY EROSION
4.2 WIND EROSION AND MIXING EROSION (DEBRIS FLOW) INTENSITY GRADUATION
4.3 Layout of Multipurpose Tunnel
5 Soil Erosion Degree Graduation
5.1 Selection of Pressure State
5.2 Sectional Shape
5.3 Sectional Dimension
6 Hydraulic Design of Tunnel
6.1 Calculation Principle
6.2 Anti-cavitation Design of Hydraulic Tunnel with High Velocity
7 Design of Soil Tunnel
7.1 Support and Lining of Soil Tunnel
7.2 Joint Division of Soil Tunnel Lining and its Anti-Seepage and Waterstop
8 Design of Tunnel Section at Adverse Geology
9 Tunnel Support and Lining
9.1 General Requirements
9.2 Loads and Load Combinations
9.3 Concrete and Reinforced Concrete lining
9.4 Prestressed Concrete Lining
9.5 Unlined and Anchor-shotcrete Lined Tunnel
9.6 Design of Reinforced Concrete Lining Bifurcated Tunnel
9.7 Joints on Lining
9.8 Design of Water Retaining Jam

1 Foreword

SL 321-2005 was issued by Ministry of Water Resources of the People's Republic of China on 10 May 2005 and has been in force since 1 July 2005.

The SL prefix, without a suffix, marks a mandatory standard: within its scope, compliance is required.

The document runs to 20 pages in English translation.

2 Scope Preview

This standard applies to: the turbine is directly connected -3 phase 50Hz, rated capacity of 25MVA and above scroll salient pole synchronous generator (hereinafter referred to as hydro). Rated capacity of 25MVA less scroll salient pole synchronous generator and the horizontal axis turbine generator can be implemented by reference.

SL 321-2005 falls under ICS 27.140, in the field of energy and heat transfer engineering.

This catalogue holds 100 other SL standards in that field.

In this catalogue, SL standards carry edition years from 1989 to 2020.

3 About this standard

Sector: Water Resources Industry Standard

Issued by: Ministry of Water Resources of the People's Republic of China

English translation: about 20 pages (approximate)

Chinese original: about 29,299 characters

4 Related standards

Standards on related subjects:

GB/T 14478-2025 — Basic technical specification of inlet valves for large and medium-sized hydraulic turbines

GB/T 10969-2008 — Specification for water passage components of hydraulic turbines, storage pumps and pump-turbines

JB/T 10384-2002 — Steel castings for flow passage components of small and medium-sized hydraulic turbines

SL 774-2019 — Specifications for excitation systems of small hydraulic generators

SL 755-2017 — Technical code for small and medium-sized hydraulic turbine governing systems

SL 746-2016 — Code for start-up test of medium or small size for hydraulic-turbine and generator units

5 Classification and status

International classification (ICS): 27.140

Chinese Standard Classification (CCS): K 55

Prefix SL: mandatory standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

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