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TECHNICAL IEC REPORT TYPE 3 61366-3 - vde turbines, storage pumps and pump-turbines ... 2 Reference
TECHNICALREPORT TYPE 3
IEC61366-3
First edition1998-03
Hydraulic turbines, storage pumpsand pump-turbines Tendering documents
Part 3:Guidelines for technical specificationsfor Pelton turbines
Turbines hydrauliques, pompes daccumulationet pompes-turbines Documents dappel doffres
Partie 3:Guide des spcifications techniques pour les turbines Pelton
IEC 1998 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varemb Geneva, SwitzerlandTelefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
VFor price, see current catalogue
2 61366-3 IEC:1998(E)
FOREWORD ................................................................................................................... 4
0 Introduction to technical specifications ...................................................................... 7
1 Scope ....................................................................................................................... 9
2 Reference documents ............................................................................................... 9
3 Technical requirements............................................................................................. 9
3.1 Scope of work.................................................................................................. 9
3.2 Limits of the contract ....................................................................................... 10
3.3 Supply by Employer ......................................................................................... 10
3.4 Design conditions ............................................................................................ 11
3.5 Technical performance and other guarantees................................................... 14
3.6 Mechanical design criteria ............................................................................... 17
3.7 Design documentation ..................................................................................... 17
3.8 Materials and construction ............................................................................... 18
3.9 Shop inspection and testing ............................................................................. 19
4 Technical specifications for fixed/embedded components .......................................... 20
4.1 Manifold .......................................................................................................... 21
4.2 Turbine housing............................................................................................... 21
5 Technical specifications for stationary/removable components .................................. 22
5.1 Branch pipe (including intake pipe and nozzle pipe).......................................... 22
5.2 Upper turbine housing (if not embedded).......................................................... 22
5.3 Turbine cover .................................................................................................. 23
5.4 Brake jet assembly .......................................................................................... 23
6 Technical specifications for injector/deflector system ................................................ 23
6.1 Injector system ................................................................................................ 23
6.2 Deflector system.............................................................................................. 24
7 Technical specifications for rotating parts, guide bearings and seals ......................... 24
7.1 Runner ............................................................................................................ 24
7.2 Main shaft ....................................................................................................... 25
7.3 Turbine guide bearing ...................................................................................... 25
7.4 Main shaft seal (if necessary) .......................................................................... 25
7.5 Standstill maintenance seal (if necessary)........................................................ 26
61366-3 IEC:1998(E) 3
8 Technical specifications for thrust bearing (when specified as part of thehydraulic machine).................................................................................................... 26
8.1 Design data ..................................................................................................... 26
8.2 Bearing support ............................................................................................... 26
8.3 Bearing assembly ............................................................................................ 26
8.4 Oil injection pressure system ........................................................................... 27
9 Technical specifications for miscellaneous components ............................................ 27
9.1 Walkways, access platforms and stairs ............................................................ 27
9.2 Lifting fixtures.................................................................................................. 27
9.3 Special tools .................................................................................................... 27
9.4 Standard tools ................................................................................................. 27
9.5 Turbine pit hoist............................................................................................... 27
9.6 Nameplate ....................................................................................................... 27
9.7 Runner cart and rails (if required) .................................................................... 28
9.8 Access door to turbine housing interior (if required).......................................... 28
10 Technical specifications for auxiliary systems............................................................ 28
10.1 Bearing lubrication system ............................................................................... 28
10.2 Cooling water system for runner....................................................................... 28
10.3 Tailwater air admission system ........................................................................ 28
10.4 Turbine pit drainage......................................................................................... 28
11 Technical specifications for instrumentation .............................................................. 29
11.1 Controls........................................................................................................... 29
11.2 Indication......................................................................................................... 29
11.3 Protection ........................................................................................................ 29
12 Spare parts............................................................................................................... 29
13 Model acceptance tests ............................................................................................ 29
14 Site installation and commissioning tests .................................................................. 30
14.1 General ........................................................................................................... 30
14.2 Installation procedures..................................................................................... 30
14.3 Tests during installation ................................................................................... 31
14.4 Commissioning tests........................................................................................ 31
15 Field acceptance tests .............................................................................................. 31
15.1 Scope and reports ........................................................................................... 31
15.2 Inspection of cavitating pitting .......................................................................... 31
4 61366-3 IEC:1998(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION____________
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES TENDERING DOCUMENTS
Part 3: Guidelines for technical specificationsfor Pelton turbines
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the International Organizationfor Standardization (ISO) in accordance with conditions determined by agreement between the twoorganizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the formof standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. Inexceptional circumstances, a technical committee may propose the publication of a technicalreport of one of the following types:
type 1, when the required support cannot be obtained for the publication of an InternationalStandard, despite repeated efforts;
type 2, when the subject is still under technical development or where for any other reasonthere is the future but no immediate possibility of an agreement on an InternationalStandard;
type 3, when a technical committee has collected data of a different kind from that which isnormally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication todecide whether they can be transformed into International Standards. Technical reports oftype 3 do not necessarily have to be reviewed until the data they provide are considered to beno longer valid or useful.
IEC 61366-3, which is a technical report of type 3, has been prepared by IEC technicalcommittee 4: Hydraulic turbines.
61366-3 IEC:1998(E) 5
4/110/CDV 4/122/RCV
Full information on the voting for the approval of this technical report can be found in the reporton voting indicated in the above table.
Technical Report IEC 61366-3 is one of a series which deals with Tendering documents forhydraulic turbines, storage pumps and pump-turbines. The series consists of seven parts:
Part 1: General and annexes (IEC 61366-1)
Part 2: Guidelines for technical specification for Francis turbines (IEC 61366-2)
Part 3: Guidelines for technical specification for Pelton turbines (IEC 61366-3)
Part 4: Guidelines for technical specification for Kaplan and propeller turbines (IEC 61366-4)
Part 5: Guidelines for technical specification for tubular turbines (IEC 61366-5)
Part 6: Guidelines for technical specification for pump-turbines (IEC 61366-6)
Part 7: Guidelines for technical specification for storage pumps (IEC 61366-7)
Parts 2 to 7 are "stand-alone" publications which when used with Part 1 contain guidelines for aspecific machine type (i.e. Parts 1 and 4 represent the combined guide for Kaplan andpropeller turbines). A summary of the proposed contents for a typical set of Tenderingdocuments is given in the following table 1 and annex A. Table 1 summarizes the arrangementof each part of this guide and serves as a reference for the various chapters and sections ofthe Tendering documents (see 3.2 of this part).
A bilingual edition of this technical report may be issued at a later date.
Table 1 Summary of guide for the preparation of Tendering Documents for hydraulic turbines, storage pumps and pump-turbines
CONTENTS OF GUIDE IEC 61366-1 TO IEC 61366-7 SAMPLE TABLE OF CONTENTS OF TENDERING DOCUMENTS (TD)(Example for the Francis turbines; see 61366-1, annex A)
Part Clause Title
1 General and annexes1 1 1 Object and scope of this guide1 2 Reference documents and definitions1 3 Arrangement of Tendering Documents1 4 Guidelines for tendering requirements1 5 Guidelines for project information1 6 Guidelines for general conditions, special conditions and general
A Sample table of contents of Tendering Documents for Francis turbinesB Comments on factors for evaluation of tendersC Check list for tender formD Examples of technical data sheetsE Technical performance guaranteesF Example of cavitation pitting guaranteesG Check list for model test specificationsH Sand erosion considerations
2 to 7 Technical specifications
2 Francis turbines3 Pelton turbines4 Kaplan and propeller turbines5 Tubular turbines6 Pump-turbines7 Storage pumps
1 Tendering requirements2 Project information3 General conditions4 Special conditions5 General requirements6 Technical specifications6.1 Technical requirements6.1.1 Scope of work6.1.2 Limits of the contract6.1.3 Supply by Employer6.1.4 Design conditions6.1.5 Performance and other guarantees6.1.6 Mechanical design criteria6.1.7 Design documentation6.1.8 Materials and construction6.1.9 Shop inspection and testing6.2 Technical specifications for fixed/embedded components6.3 Technical specifications for stationary/removable components6.4 Technical specifications for guide vane regulating apparatus6.5 Technical specifications for rotating parts, bearings and seals6.6 Technical specifications for thrust bearings6.7 Technical specifications for miscellaneous components6.8 Technical specifications for auxiliary systems6.9 Technical specifications for instrumentation6.10 Spare parts6.11 Model tests6.12 Installation and commissioning6.13 Field acceptance tests
61366-3 IEC:1998(E) 7
0 Introduction to technical specifications
The main purpose of the technical specifications is to describe the specific technicalrequirements for the hydraulic machine for which the Tendering documents (TD) are beingissued. To achieve clarity and to avoid confusion in contract administration, the Employershould not specify anything in the technical specifications which is of importance only to thepreparation of the tender. Such information and instructions should be given only in theInstructions to Tenderers (ITT). Accordingly, the ITT may refer to other chapters and sectionsthe Tendering documents but not vice versa. As a general rule the word "Tenderer" should beconfined in use only to TD chapter 1 "Tendering requirements"; elsewhere the term"Contractor" should be used.
Special attention should be given to items of a project specific nature such as materials,protective coating systems, mechanical piping systems, electrical systems and instrumentation.It is common for the Employer to use technical standards for such items which would apply toall contracts for a particular project or projects. In this event, detailed technical standardsshould be specified in TD chapter 5 "General requirements".
Technical specifications for the various types of hydraulic machines included in this guide areprovided in the following parts:
Francis turbines (Part 2);
Pelton turbines (Part 3);
Propeller and Kaplan turbines (Part 4);
Tubular turbines (Part 5);
Pump-turbines (Part 6);
Storage pumps (Part 7).
The guidelines for preparation of Pelton turbine specifications include technical specificationsfor the following:
Design conditions: Project arrangement, hydraulic conditions, specified conditions, mode ofoperation, generator characteristics, synchronous condenser characteristics, transientbehaviour data, stability of the system, noise, vibration, pressure fluctuations and safetyrequirements.
Technical performance and other guarantees:
y power;
y discharge (if required);
y efficiency;
y maximum momentary pressure;
y minimum momentary pressure;
y maximum momentary overspeed;
y maximum steady-state runaway speed;
8 61366-3 IEC:1998(E)
y cavitation pitting;
y hydraulic thrust;
y maximum weights and dimensions for transportation, erection and maintenance.
Mechanical design criteria: design standards, stresses and deflections and special designconsiderations (earthquake acceleration, etc.).
Design documentation: Contractors input needed for the Employer's design, Contractor'sdrawings and data, Contractor's review of the Employer's design and technical reports byContractor.
Materials and construction: material selection and standards, quality assurance procedures,shop methods, corrosion protection and painting.
Shop inspection and testing: general requirements and reports, material tests andcertificates, dimensional checks, shop assembly and tests.
Fixed/embedded components: manifold for multi-jet turbines and turbine housing.
Stationary/removable components: branch pipe for horizontal turbines, upper turbinehousing (if not embedded), turbine cover, brake jet assembly).
Injector and deflector systems: nozzles, needles, needle servomotors, deflectors or cut-indeflectors, deflector servomotors, links, needle-deflector combining mechanism and oilpiping.
Rotating parts, bearings and seals: runner, main shaft, guide bearing with oil supply,oil/water cooler, shaft seal.
Thrust bearing (when part of the hydraulic machine supply): bearing support, thrust block,rotating ring, thrust bearing pads and pivots, oil sump with oil supply (common with guidebearing, if any), oil/water coolers, instrumentation.
Miscellaneous components: walkways, lifting fixtures, special tools, standard tools, turbinepit hoist, nameplate, runner inspection platform (if required).
Auxiliary systems: bearing lubrication system (if required), tailwater air admission system,turbine pit drainage (if required), turbine housing ventilation, tailwater depression (ifrequired).
Instrumentation: controls, indication and protection.
Spare parts: basic spare parts.
Model acceptance tests: test requirements.
Site installation and commissioning tests: Installation procedures and commissioning tests.
Field acceptance tests: scope of field tests, reports and inspection of cavitation pitting.
An example of the proposed table of contents for Tendering documents for a Francis turbine isgiven in annex A of IEC 61366-1. The example does not include technical specifications for thecontrol system, or high-pressure side valves which, at the Employers option, may be includedin the Tendering documents for the Pelton turbine or may be specified in separate Tenderingdocuments.
Chapter 6 (technical specifications) of the Tendering documents should be arranged as follows:
6.1 Technical requirements;
6.2 Technical specifications for fixed/embedded components;
6.3 Technical specifications for stationary/removable components;
6.4 Technical specifications for deflector/cut-in deflector regulating apparatus;
6.5 Technical specifications for rotating parts, guide bearings and seals;
6.6 Technical specifications for thrust bearing;
6.7 Technical specifications for miscellaneous components;
6.8 Technical specifications for auxiliary systems;
6.9 Technical specifications for instrumentation;
61366-3 IEC:1998(E) 9
6.10 Spare parts;
6.11 Model acceptance tests;
6.12 Site installation and commissioning tests;
6.13 Field acceptance tests.
This Technical Report, referred to herein as Guide, is intended to assist in the preparation ofTendering documents and Tendering proposals and in the evaluation of tenders for hydraulicmachines. This part of IEC 61366 provides guidelines for Pelton turbines.
IEC 60041:1992, Field acceptance tests to determine the hydraulic performance of hydraulicturbines, storage pumps and pump-turbines
IEC 60193:1965, International code for model acceptance tests of hydraulic turbines
IEC 60308:1970, International code for testing of speed governing systems for hydraulicturbines
IEC 60545:1976, Guide for commissioning, operation an maintenance of hydraulic turbines
IEC 60609-2:1997, Cavitation pitting evaluation in hydraulic turbines, storage pumps andpump-turbines Part 2: Evaluation in Pelton turbines
IEC 60994:1991, Guide for field measurement of vibrations and pulsations in hydraulicmachines (turbines, storage pumps and pump-turbines)
IEC 60995:1991, Determination of the prototype performance from model acceptance tests ofhydraulic machines with consideration of scale effects
IEC 61362, Guide to specification of hydro-turbine control systems 1)
ISO 3740:1980, Acoustics Determination of sound power levels of noise sources Guidelinesfor the use of basic standards and for the propagation of noise test codes
This subclause should describe the scope of work and the responsibilities which are to beconferred upon the Contractor. The general statement of scope of work presented in TD 2)section 2.1 (5.1) shall be consistent with what is presented here. In a similar manner, pay itemsin the tender form, TD section 1.2 (subclause 4.2) should be defined directly from TDsubsection 6.1.1.
The scope of work should begin with a general statement which outlines the various elementsof the work including (where applicable) the design, model testing, supply of materials andlabour, fabrication, machining, quality assurance, quality control, shop assembly, shop testing,spare parts, transportation to site, site installation, commissioning, acceptance testing,warranty and other services specified or required for the items of work. The general statementshould be followed by a specific and detailed list of the major items which the Employer wishesto have as separate payment items in the tender form, for example:
___________1) To be published.2) All references to Tendering documents (TD) apply to annex A of IEC 61366-1.
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