SIST IEC/TR 61366-7:1999

Hydraulic turbines, storage pumps and pump-turbines - Tendering Documents - Part 7: Guidelines for technical specifications for storage pumps

IEC TR 63018:2015(E) specifies a guideline for improvement of signal loss by using noise suppression materials (hereafter referred to as NSMs) for FPCBs. This Technical Report also indicates a measuring method of signal loss variations of FPCBs using NSMs using network analyzer equipment. In addition, this method only measures the value of the signal loss variation by using NSMs for FPCBs. This report, however, neither determines nor indicates the structure or material of FPCBs.

Vodne turbine, akumulacijske črpalke in črpalne turbine – Razpisna dokumentacija – 7. del: Smernice za tehnične specifikacije akumulacijskih črpalk

General Information

• Status: Published
• Publication Date: 31-Mar-1999
• ICS: 27.140 - Hydraulic energy engineering
• Technical Committee: IEHT - Electrotechnics - Hydraulic turbins
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1999
• Due Date: 01-Apr-1999
• Completion Date: 01-Apr-1999
• Ref Project: IEC TR 63018:2015 - Flexible printed circuit boards (FPCBs) - Method to decrease signal loss by using noise suppression materials

Overview

IEC TR 63018:2015 provides a guideline and measurement method for assessing and improving signal loss in flexible printed circuit boards (FPCBs) when applying noise suppression materials (NSMs). The Technical Report defines test specimen design and a network-analyzer-based procedure to measure the variation in transmission loss introduced by NSMs (i.e., comparing a bare FPCB to a shield FPCB). The report does not prescribe FPCB structures or materials beyond the measurement method - it focuses on quantifying the effect of NSMs on high‑frequency signal loss.

Key topics and technical requirements

• Measurement approach
  • Use of a network analyzer to record S-parameters (S11, S21) and quantify transmission loss over a specified frequency range.
  • Block diagram and example setup for signal-loss measurement (including coaxial cables and SMA terminals).
• Test specimen design
  • Comparative coupons containing both bare and shielded regions on the same board to enable uniform, side‑by‑side measurement.
  • Specimen length recommended to be over 5 cm for stable results.
  • Use of SMA connectors on specimen ends; Cu trace widths selected within manufacturing tolerances.
  • Via holes are important to ensure electrical contact between NSM/shield conductive adhesive and ground; size/spacing to be agreed between user and supplier (AABUS).
• Shield region cross-section (example values from the report)
  • Shield insulation layer: 5 µm
  • Shield conductive layer: 0.1 / 2 µm (as shown in the illustrative cross‑section)
  • Shield conductive adhesive layer: 10 µm
  • Copper conductor examples: ~23 µm, PI and adhesive layer thicknesses listed in the figure.
• Test procedure elements
  • Preparation steps: lamination of NSM to half the board, marking trace widths, connector attachment.
  • Measurement setup: network analyzer configuration (frequency range, dielectric constant), connection via SMA/coax, data capture, calculation and analysis of signal loss variation (bare vs shielded).
• Analysis and improvement
  • Methods to assess how NSMs increase signal loss and recommendations for design or material selection to minimize signal degradation while achieving EMI suppression.

Applications and users

IEC TR 63018 is practical for:

• FPCB manufacturers and designers optimizing high‑frequency signal integrity while applying NSMs.
• NSM suppliers validating absorber performance and impact on transmission loss.
• Test laboratories and QA teams performing comparative measurements on shielded vs bare FPCBs.
• Electronics OEMs (smartphones, tablets, display and mobile devices) specifying acceptance criteria for FPCB EMI mitigation.

Keywords naturally included: flexible printed circuit boards, FPCBs, noise suppression materials (NSMs), signal loss, EMI suppression, network analyzer, SMA, shield FPCB, transmission loss.

Related standards

• IEC 62333-1:2006 - Noise suppression sheet for digital devices and equipment (referenced normative document in IEC TR 63018).

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-1999
9RGQHWXUELQHDNXPXODFLMVNHþUSDONHLQþUSDOQHWXUELQH±5D]SLVQDGRNXPHQWDFLMD
±GHO6PHUQLFH]DWHKQLþQHVSHFLILNDFLMHDNXPXODFLMVNLKþUSDON
Hydraulic turbines, storage pumps and pump-turbines - Tendering Documents - Part 7:
Guidelines for technical specifications for storage pumps
Ta slovenski standard je istoveten z: IEC/TR 61366-7
ICS:
27.140 Vodna energija Hydraulic energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL IEC
REPORT – TYPE 3
61366-7
First edition
1998-03
Hydraulic turbines, storage pumps
and pump-turbines –
Tendering Documents –
Part 7:
Guidelines for technical specifications
for storage pumps
Turbines hydrauliques, pompes d’accumulation
et pompes-turbines –
Documents d’appel d’offres –
Partie 7:
Guide des spécifications techniques
pour les pompes d'accumulation
 IEC 1998  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
V
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61366-7 © IEC:1998(E)
CONTENTS
12 Page
FOREWORD . 4
Clause
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 . 11
3.4 Design conditions . 11
3.5 Technical performance and other guarantees. 15
3.6 Mechanical design criteria . 18
3.7 Design documentation . 18
3.8 Materials and construction . 19
3.9 Shop inspection and testing . 20
4 Technical specifications for fixed/embedded components. 21
4.1 Spiral case . 22
4.2 Diffuser ring . 23
4.3 Foundation ring . 23
4.4 Suction tube and suction tube liner (if any). 23
4.5 Pit liner. 24
4.6 Conveyor case and return ring (if any). 24
5 Technical specifications for stationary/removable components . 24
5.1 Headcover and bottom ring . 24
5.2 Stationary wearing rings. 25
5.3 Replaceable diffuser ring . 25
6 Technical specifications for rotating parts, bearings and seals. 25
6.1 Impeller . 25
6.2 Main shaft . 25
6.3 Guide bearing. 26
6.4 Main shaft seal . 26
6.5 Sandstill (maintenance) seal . 26
7 Technical specifications for thrust bearing. 27
7.1 Design. 27
7.2 Bearing support . 27
7.3 Bearing assembly . 27
7.4 Oil injection pressure lift system. 27

61366-7 © IEC:1998(E) – 3 –
Clause Page
8 Technical specifications for miscellaneous components . 27
8.1 Walkways, access platforms and stairs . 27
8.2 Lifting fixtures. 28
8.3 Special tools. 28
8.4 Standard tools . 28
8.5 Storage pump pit hoist. 28
8.6 Nameplate. 28
9 Technical specifications for auxiliary systems. 28
9.1 Bearing lubrication system . 28
9.2 Impeller pressure balancing and pressure relief lines . 29
9.3 Storage pump pit drainage. 29
9.4 Tailwater depression system. 29
10 Technical specifications for instrumentation . 29
10.1 Controls. 29
10.2 Indication. 29
10.3 Protection. 29
11 Spare parts. 29
12 Model acceptance tests . 30
13 Site installation and commissioning tests . 31
13.1 General . 31
13.2 Installation procedures. 31
13.3 Tests during installation . 31
13.4 Commissioning tests. 31
14 Field acceptance tests . 32
14.1 Scope and reports . 32
14.2 Inspection of cavitating pitting. 32

– 4 – 61366-7 © IEC:1998(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES –
TENDERING DOCUMENTS –
Part 7: Guidelines for technical specifications
for storage pumps
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of 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 International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment 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 subject
of 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. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an International
Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other reason
there is the future but no immediate possibility of an agreement on an International
Standard;
• type 3, when a technical committee has collected data of a different kind from that which is
normally 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 to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
IEC 61366-7, which is a technical report of type 3, has been prepared by IEC technical
committee 4: Hydraulic turbines.

61366-7 © IEC:1998(E) – 5 –
The text of this technical report is based on the following documents:
Committee draft Report on voting
4/110/CDV 4/122/RVC
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
Technical Report IEC 61366-7 is one of a series which deals with Tendering Documents for
hydraulic turbines, storage pumps and pump-turbines. The series consists of seven parts:
IEC 61366-1: 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 IEC 61366-1 contain
guidelines for a specific machine type (i.e. Parts 1 and 4 represent the combined guide for
Kaplan and propeller turbines). A summary of the proposed contents for a typical set of
Tendering Documents is given in the following table 1 and annex A. Table 1 summarizes the
arrangement of each part of this guide and serves as a reference for the various chapters and
sections of the 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 Chapter Title
1 General and annexes 1 Tendering requirements
1– 2 Project information
1 1 Object and scope of this guide 3 General conditions
1 2 Reference documents and definitions 4 Special conditions
1 3 Arrangement of Tendering Documents 5 General requirements
1 4 Guidelines for tendering requirements 6 Technical specifications
1 5 Guidelines for project information 6.1 Technical requirements
1 6 Guidelines for general conditions, special conditions and general 6.1.1 Scope of work
requirements 6.1.2 Limits of the contract
6.1.3 Supply by Employer
1 Annexes 6.1.4 Design conditions
6.1.5 Performance and other guarantees
A Sample table of contents of Tendering Documents for Francis turbines 6.1.6 Mechanical design criteria
B Comments on factors for evaluation of tenders 6.1.7 Design documentation
C Check list for tender form 6.1.8 Materials and construction
D Examples of technical data sheets 6.1.9 Shop inspection and testing
E Technical performance guarantees 6.2 Technical specifications for fixed/embedded components
F Example of cavitation pitting guarantees 6.3 Technical specifications for stationary/removable components
G Check list for model test specifications 6.4 Technical specifications for guide vane regulating apparatus
H Sand erosion considerations 6.5 Technical specifications for rotating parts, bearings and seals
6.6 Technical specifications for thrust bearings
2 to 7 Technical specifications 6.7 Technical specifications for miscellaneous components
6.8 Technical specifications for auxiliary systems
2 Francis turbines 6.9 Technical specifications for instrumentation
3 Pelton turbines 6.10 Spare parts
4 Kaplan and propeller turbines 6.11 Model tests
5 Tubular turbines 6.12 Installation and commissioning
6 Pump-turbines 6.13 Field acceptance tests
7 Storage pumps
61366-7 © IEC:1998(E) – 7 –
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES –
TENDERING DOCUMENTS –
Part 7: Guidelines for technical specifications
for storage pumps
0 Introduction to technical specifications
The main purpose of the technical specifications is to describe the specific technical
requirements for the hydraulic machine for which the Tendering Documents (TD) are being
issued. To achieve clarity and to avoid confusion in contract administration, the Employer
should not specify anything in the technical specifications, which is of importance only to the
preparation of the tender. Such information and instructions should be given only in the
instructions to Tenderers (ITT). Accordingly, the ITT may refer to other chapters and sections
of the Tendering Documents but not vice versa. As a general rule the word "Tenderer" should
be confined in use only to TD chapter 1 "Tendering requirements" of the Tendering Document,
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, instrumentation. It
is common for Employers to use technical standards for such items which would apply to all
contracts for a particular project or projects. In this event, detailed technical standards should
be specified in TD chapter 5 "General requirements".
Technical specifications for the various types of hydraulic machines included in this Guide are
provided in the following clauses:
Francis turbines (Part 2);
Pelton turbines (Part 3);
Kaplan and propeller turbines (Part 4);
Tubular turbines (Part 5);
Pump-turbines (Part 6);
Storage pumps (Part 7).
The guidelines for preparation of storage pump specifications include technical specifications
for the following:
– Design conditions: project arrangement, hydraulic conditions, specified conditions, modes
of operation, generator characteristics, motor characteristics, synchronous condenser
characteristics, speed-up procedure for pump-mode, transient behaviour data, change-over
times and characteristics, stability of the system, noise, vibration, pressure fluctuations and
safety requirements.
– Technical performance and other guarantees:
ypower;
ydischarge;
yspecific hydraulic energy (head);
yefficiency;
ymaximum momentary pressure;
yminimum momentary pressure;
ymaximum momentary reverse overspeed;

– 8 – 61366-7 © IEC:1998(E)
ymaximum steady-state reverse runaway speed;
ycavitation pitting;
yhydraulic thrust;
ychange over times;
ymaximum weights and dimensions for transportation, erection and maintenance.
– Mechanical design criteria: Design standards, stresses and deflections and special design
considerations (earthquake, acceleration, etc.).
– Design documentation: Contractor's input needed for the Employer's design, the
Contractor's drawings and data, the Contractor's review of the Employer's design and
technical reports by the Contractor.
– 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 and
certificates, dimensional checks, shop assembly and tests.
– Fixed/embedded components: Spiral case with compressible wrapping (if any), diffuser,
suction tube, suction tube liner, pit liner, and foundation plates and anchorage.
– Stationary/removable components: Headcover, bottom ring, facing plates, stationary
wearing ring, diffuser ring.
– Rotating parts, bearings and seals: Impeller, main shaft, guide bearing with oil supply,
oil/water cooler, main shaft seal, standstill shaft seal.
– Thrust bearing (when specified as part of the hydraulic machine supply): Bearing support,
thrust block, rotating ring, thrust bearing pads and pivots, oil sump with oil supply (common
with guide bearing, if any), oil/water coolers, instrumentation.
– Miscellaneous components: Walkways, lifting fixtures, special tools, standard tools, pump
pit hoist, nameplate, suction tube maintenance platform.
– Auxiliary systems: Impeller pressure balancing and pressure relief lines, pump pit drainage
and other drainage systems; lubrication, tailwater depression, cooling water supply for
impeller seal for blow-down operation.
– 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, inspection of cavitation pitting.
An example of the proposed table of contents for Tendering Documents for a Francis turbine is
given in annex A of IEC 61366-1. The example does not include technical specifications for
relief valves, high and low-pressure side valves or gates which, at the Employer's option, may
be included in the Tendering Documents for storage pumps or may be specified in separate
documents.
A storage pump may be driven by a motor or by a motor-generator in case of a tandem unit. In
Part 7, the term motor is also used in the case of a motor-generator (tandem unit). Part 7 does
not include the motor and electrical system which may, at the Employer's option, be included in
the Tendering Documents for the storage pump or specified as separate documents.
Chapter 6 "technical specifications" of the Tendering Documents should be arranged as
follows:
6.1 Technical requirements;
6.2 Technical specifications for embedded components;
6.3 Technical specifications for stationary/removable components;
6.4 Technical specifications for rotating parts, guide bearings and seals;

61366-7 © IEC:1998(E) – 9 –
6.5 Technical specifications for thrust bearing;
6.6 Technical specifications for miscellaneous components;
6.7 Technical specifications for auxiliary systems;
6.8 Technical specifications for instrumentation;
6.9 Spare parts;
6.10 Model acceptance tests;
6.11 Site installation and commissioning;
6.12 Field acceptance tests.
1 Scope
This technical report, referred to herein as the Guide, is intended to assist in the preparation of
Tendering Documents and tendering proposals and in the evaluation of tenders for hydraulic
machines. This part of IEC 61366 provides guidelines for storage pumps.
2 Reference documents
IEC 60041:1992, Field acceptance tests to determine the hydraulic performance of hydraulic
turbines, storage pumps and pump-turbines
IEC 60193:1965, International code for model acceptance tests of hydraulic turbines
IEC 60609:1978, Cavitation pitting evaluation in hydraulic turbines, storage pumps and pump-
turbines
IEC 60805:1985, Guide for commissioning operation and maintenance of storage pumps and of
pump-turbines operating as pumps
IEC 60994:1991, Guide for field measurement of vibrations and pulsations in hydraulic
machines (turbines, storage pumps and pump turbines)
ISO 3740:1980, Acoustics – Determination of sound power levels of noise sources – Guidelines
for the use of basic standards and for the preparation of noise test codes
3 Technical requirements
3.1 Scope of work
This subclause should describe the scope of work and the responsibilities which are to be
1)
conferred upon Contractor. The general statement of scope of work presented in TD
Section 2.1 (5.1 in IEC 61366-1) shall be consistent with what is presented here. In a similar
manner, pay items in the tender form, TD section 1.2 (4.2 in IEC 61366-1) should be defined
directly from TD subsection 6.1.1.
The scope of work should begin with a general statement which outlines the various elements
of the work including (where applicable) the layout, the design, model testing, supply of
materials and labour, 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.
It is important to study in detail the general arrangement of a storage pump, especially in case
of a ternary unit. The choice of a vertical or horizontal shaft arrangement may be influenced by
civil engineering costs and cavitation behaviour of the pump.
___________
1)
All references to Tendering Documents (TD) apply to annex A of IEC 61366-1.

– 10 – 61366-7 © IEC:1998(E)
The layout of a storage pump may lead to single or multistage and/or to single or double-
suction arrangement. Economical operation and operational flexibility of a ternary unit may
require additional machines and equipment such as starting turbine, engageable coupling,
hydraulic converter as well as a booster pump to provide the necessary net positive suction
specific energy (net positive suction head). There is the possibility to apply a motor with two or
with variable speeds. Accordingly, it is recommended to evaluate in a preliminary study the
most feasible solution.
The Employer should indicate the type of the main valve (shut-off valve) at the high-pressure
side of the machine, eventually also the type of the valve at the low-pressure side.
Rare types of storage pumps, e.g. diagonal and axial storage pumps with adjustable impeller
blades including tubular pump types are not presented in this part. For the description of
additional components such as impeller blade servomotor assembly, oil pressure unit and
regulator may be referred to Part 4 (Kaplan and propeller turbines) and Part 5 (tubular
turbines).
The general statement should be followed by a specific and detailed list of the major items
which the Employer wishes to have as separate payment items in the tender form, for example:
Item Description
1 Two vertical shaft, single flow, three stage storage pumps, each designed for a pump
discharge of 4,5 m /s, at a specified hydraulic energy of 4 412.7 J/Kg (specified pump
head of 450 m) and a rotational speed of 10 revolutions per second (600 rpm), directly
coupled to a motor-generator with a maximum apparent power of 25 000 kVA;
2 Pump model testing;
3 Tools, slings and handling devices required for maintenance of the storage pumps;
4 Transportation and delivery to site;
5 Site installation, commissioning, and acceptance testing;
6 Preparation and submission of operation and maintenance manual and training of the
Employer's operating and maintenance staff in the optimum use of these manuals; and
7 Spare parts required for operation and maintenance.
3.2 Limits of the contract
This subclause, making reference to the Employer's drawings and data should give in detail the
limits of the contract considering the following:
– details of the design and supply limits of the high and low-pressure sides of the machine;
– details, location, and responsibility for field connection of spiral case to penstock or valve
on high-pressure side;
– details and location of the low-pressure side termination of the suction tube liner;
– details and location of valve(s) or gate(s) on low-pressure side;
– orientation and location of the pump/motor shaft coupling flange interface;
– responsibility for supply and installation of flange coupling bolts, nuts and guards at
motor/storage pump coupling, including drilling jig;
– responsibility for supply and installation of bolts, nuts, gaskets at piping termination;
– termination of spiral case and suction tube dewatering piping;
– termination of spiral case air exhaust piping (if any);
– termination of pit drainage piping;
– termination of bearing lubricating oil piping;
– termination of shaft seal piping (if any);

61366-7 © IEC:1998(E) – 11 –
– termination of piping (if required) to carry upper impeller seal leakage to the suction tube or
to the drainage system;
– termination of cooling water piping for bearings;
– thrust bearing (if specified);
– termination points and junction boxes for wiring for power, control, indication, protection,
and lighting;
– compressed air for service and other functions;
NOTE – Contract limits will change if other major items of equipment (such as shut-off valves, motors, excitation
systems, control metering and relaying systems, switchgear, power transformer, starting equipment, engageable
couplings, hydraulic converters and booster pumps) are included with the storage pump equipment in a common set
of Tendering Documents.
3.3 Supply by Employer
This subclause should be complementary to 5.6 of IEC 61366-1 (TD 2.6) and should list the
items and services which will be the responsibility of the Employer. The following items should
be considered:
– services during erection;
– temporary enclosures for site storage of storage pump parts or for erection;
– installation, in primary concrete, of small items provided by the Contractor such as anchors,
sole plates and piping;
– concrete for embedment of storage pump components - supply, placement and control,
including monitoring and verification during and after concrete placement by others;
– grout injection if required either within or around storage pump components;
– powerhouse crane and operator;
– connections to powerhouse air, oil and water piping systems;
– supply of filtered water for storage pump shaft seal;
– electrical wiring and hardware external to specified termination points;
– electric motor starters and controls;
– control, annunciation and protection systems external to specified termination points;
– external lubricating oil storage, distribution, and purification systems;
– lubricants and bearing oil to the Contractor's specifications.
It should be stated that any materials or services required for installation and commissioning of
the units, and not specifically mentioned in the above list of Employer supplied items, are to be
provided under the contract.
3.4 Design conditions
3.4.1 Project arrangement
The detailed project arrangement should contain the Employer's description together with
general arrangement drawings (by the Employer) of the powerhouse and all water ways at the
low and high-pressure side, such as channels, galleries, penstocks, surge tank gates, valves,
etc. The description should be an extension of the applicable data provided in TD chapter 2
"Project information". The data shall be sufficiently clear so that the Contractor is aware of
physical conditions which may influence the application of its detailed design.

– 12 – 61366-7 © IEC:1998(E)
In any event, the Employer should retain responsibility for specifying values of all parameters
on which guarantees are based, as part of the overall design of the plant. This applies
particularly to the correct inlet and outlet conditions and in the coordination of the interaction
between the hydraulic machine and the water ways.
3.4.2 Hydraulic conditions
This subclause should present the hydraulic conditions under which the Employer proposes to
operate the completed facility such as:
– specific hydraulic energy (pump head) of the machine (see 2.5 of IEC 61366-1);
– headwater levels, maximum, minimum and normal and when no water is flowing;
– tailwater levels, maximum, minimum and normal and when no water is flowing;
– minimum tailwater level as a function of discharge for cavitation guarantee;
– range of specific hydraulic energy (pump head) of the plant;
– specific hydraulic energy losses between tailwater level and low-pressure reference section
of the machine (E );
L 4-2
– specific hydraulic energy losses between high-pressure reference section of the machine
and headwater level (E );
L 1-3
– power values in the range of specific hydraulic energy (pump head);
– maximum specific hydraulic energy (head) for runaway speed guarantee;
– range of water temperatures;
– water quality analysis (chemical, corrosive nature, biological, and suspended solids);
– range of ambient temperatures and humidity (tropical environment or extreme cold needs to
be clearly defined).
3.4.3 Specified conditions
a) Modes of operation: As an extension to TD section 2.5, the Employer should provide
sufficient data to enable the Contractor to understand the Employer's intended mode(s) of
storage pump starting and operation. Data should include, wherever possible, the
anticipated number of start-stops per year and the capacity factor of the plant. Special uses
shall also be clearly identified such as synchronous condenser, isolated and black start
operations and requirements, penstock filling through pump, etc.
b) Starting mode procedures and changeover sequences.
The Employer should specify the method of starting procedure, e.g.:
– Storage pump impeller(s) rotating in water
yaccelerated by the motor
yaccelerated by the turbine (ternary unit)
yaccelerated through a hydraulic converter
– Storage pump impeller(s) rotating in air
yaccelerated by the motor
yaccelerated by a starting turbine
yaccelerated by the turbine (ternary unit)
The Employer should indicate data (if any) required for changeover sequences, e.g.:
– Standstill to pump mode
– Pump mode to standstill
61366-7 © IEC:1998(E) – 13 –
c) Specific hydraulic energy (E) [head (H)], discharge (Q) and power (P): The limits of
specified specific hydraulic energy are determined from an analysis of the power plant
situation, available discharge, power and specific hydraulic energy losses in the water
ways. The Employer shall provide adequate data on any limitation on maximum and
minimum discharge and on maximum power available to enable the Contractor to optimise
the layout and design of the storage pump. The range of tolerance should be clearly
defined (e.g. minus 6 % to plus 4 % of specified discharge).
It is recommended to specify the maximum discharge or power under the lowest specific
hydraulic energy or the minimum discharge under the highest specific hydraulic energy. In
case of small ranges of specific hydraulic energy, it is sufficient to specify only one value of
discharge or power.
d) Speed: The choice of speed of the unit has an impact on storage pump and motor costs, on
the setting (see annex B, clause B.3 of IEC 61366-1) of the pump with respect to tailwater
levels and on powerhouse costs. The choice of speed may also be influenced by strength
considerations; e.g. in case of an underground powerhouse where, because of favourable
cavitation conditions, a higher speed could be selected but the higher speed may be limited
by strength considerations.
If permitted by the project schedule, the approximate cost per meter of powerhouse setting,
and the approximate cost per kVA for various possible speed options for the motor should
be specified in the ITT (TD section 1.1.15) so that the Tenderers may quote the machine
which best suits site conditions and their available design.
In most cases, the project schedule dictates an early decision with respect to speed. Under
such conditions, discussions should be held with potential suppliers of storage pumps and
motors to fix a "preferred speed"; alternative proposals may be invited in the ITT.
e) Direction of rotation: The direction of rotation of the storage pump is dictated by optimum
orientation of the spiral case with respect to intake, penstock and power house costs. The
direction should be specified clockwise or counterclockwise looking from the motor toward
the pump.
3.4.4 Motor characteristics
The specifications should state the principle characteristics of the motor to which the storage
pump will be coupled, for example:
– capacity (kVA);
– power factor;
– frequency (normal and exceptional range);
– inertia or flywheel effect of motor;
– preferred speed (if established);
– preferred bearing arrangement (if established);
– approximate rotor diameter (if available); and
– approximate diameter of stator to remove pump components (if available).
3.4.5 Transient behaviour data
Transient operating conditions cause pressure and speed variations dependent on the type of
machine and on the movement of the shut-off valve. Factors which need to be considered by
the Employer in setting out criteria for calculation of transient phenomena (water hammer
calculation) are:
– details of high-pressure and low-pressure conduits;
– inertia of rotating parts;
– velocity of pressure waves (sound velocity in water);
– high and low-pressure side valve(s)/gate(s) opening and closing time;

– 14 – 61366-7 © IEC:1998(E)
– transient characteristics (operating characteristics, four quadrant characteristics) of the
pump;
– modes of operation;
– emergency conditions, e.g.
yfull or partial power failing
ythe main valve is closing
ythe valve does not close
ywhen there are several units, one valve is closing only or all valves are closing.
The results of the water hammer calculation should confirm:
– pressure variations along the water conduits (maximum/minimum momentary pressure);
– pressure variations in the spiral case and suction tube;
– speed variations of the unit (maximum/minimum momentary speed and reverse runaway
speed).
Transient data established by the Employer should be provided and those data which require
verification by the Contractor should be specified. Other data not specified by the Employer
may have to be established by Contractor (refer to guarantees in 3.5.5 and 3.5.6).
3.4.6 Stability of the system
The Employer should furnish the information necessary in order to predict possible resonance
in the water passages of the power plant and in the unit. Admissible limits may be specified for
fluctuations of shaft torque and of pressure in the suction tube.
3.4.7 Noise
Noise level limits may be legislated by national or local statutes. Noise abatement measures
may be the combined responsibility of the Employer and Contractor. Reference should be
made by the Employer to ISO 3740 together with other standards, statutes or guides to
establish noise measurement and acceptance criteria. The limits and the means by which they
can be achieved should be specified in TD subsection 6.1.5.11.
NOTE – The Employer should recognize that additional protection to reduce noise level may have a significant
effect on the cost of the machine.
3.4.8 Vibration
The specifications should require that the machine operates through its full range of specified
conditions without vibration which would be detrimental to its service life. Reference should be
made by the Employer to IEC 60994 together with other suitable standards and guides to
establish deflection measurements and acceptance criteria. Limits of vibration may be
established for steady-state conditions and for normal transient regimes as criteria for final
acceptance.
3.4.9 Sand erosion considerations
Risk of sand erosion may influence the design and operation of the hydraulic machine. In this
event, the technical specifications should indicate the content of suspended solids, their type,
hardness, size and shape. See annex H of IEC 61366-1.
3.4.10 Safety requirements
The Employer should state specific safety requirements which shall be met in the design of the
storage pump. These requirements are in addition to the general safety related items outlined
in 5.6 of IEC 61366-1.
61366-7 © IEC:1998(E) – 15 –
3.5 Technical performance and other guarantees
3.5.1 General
Hydraulic performance guarantees for hydraulic machines are presented in clause 3 of
IEC 60041. The main guarantees are outlined in annex E of IEC 61366-1 and should be read in
conjunction with IEC 60041.
The main hydraulic performance guarantees (i.e. power, discharge, efficiency and runaway
speed) may be verified by field acceptance tests or by model tests. Guarantees may be
referred directly to the hydraulic performance of the model (without scale effect) or alternatively
to the hydraulic performance of the prototype computed from model tests with allowance for
scale effects, see IEC 60193. Efficiency guarantees on both model and prototype are not
applicable.
The Employer should establish and specify the parameters on which the performance
guarantees are to be based. These parameters include plant specific hydraulic energy (plant
head) and energy losses external to the high-pressure and low-pressure reference sections of
the machine. The Employer should retain responsibility for specifying acceptable inlet and
outlet conditions of the machine and for co-ordinating the study of interaction between the
machine and the external waterways under transient and steady-state oscillation conditions.
In those cases where it is not possible to perform field acceptance tests under specified
conditions refer to IEC 60041.
The Employer should specify measurement methods and measurement uncertainties which are
contractually applied if other than those established by relevant IEC publications.
In addition to specifying the guaranteed performance provisions in the technical specification, it
is important that the Employer summarize these provisions in TD subsection 1.1.13 of the ITT.
Also, it is desirable that the manner in which the Tenderer presents and states the performance
guarantees be clearly specified.
The Employer should select the appropriate level and type of performance guarantees for the
machine taking into consideration the intended mode of operation and the importance of the
machine in the system.
When it is necessary to include other aspects of the machine under technical guarantees (such
as noise and vibrations), the Employer should include these provisions at the end of this
section taking into consideration that data available may not be sufficient based on extended
experience. In any event, conditions under which guarantees are evaluated shall be specified.
3.5.2 Guaranteed power
In specifying the guarantee refer to 3.4.3 (TD 6.1.4.3). Normally the maximum value of power
in the whole range of operation is guaranteed. The Contractor should guarantee the power,
which should not be exceeded (see annex E of IEC 61366-1). Increased frequency of the
system should be considered (e.g. 52 Hz); refer to E.2.2c) and d) in Annex E of IEC 61366-1.
It is necessary, in this subclause, to establish the contractual obligations of the Contractor if
the guaranteed power is not met or exceeded. The method(s) of measurements, method of
comparison with guarantees and application for IEC 60041 shall be clearly defined.
3.5.3 Guaranteed discharge
The discharge is normally guaranteed for one or more specified values of specific hydraulic
energy (pump head). This should take into account that the specific hydraulic energy E is the
specific hydraulic energy of the plant E (plant head H ) plus the specific hydraulic
g g
energy losses E (head losses H ) in the water conduits on the low and high-pressure side
L L
(see 2.5 and figure 1 of IEC 61366-1).

– 16 – 61366-7 © IEC:1998(E)
It is necessary to establish in this subclause, the contractual obligations of the Contractor if the
guaranteed discharge is not met. Method(s) of measurements, method of comparison with
guarantees and application of IEC 60041 shall be clearly defined.
The Contractor guarantees the discharge, respectively the discharge to be reached or not to be
exceeded (see annex E of IEC 61366-1).
3.5.4 Guaranteed efficiency
a) The Contractor guarantees the efficiencies for one or more specified value(s) of specific
hydraulic energy (see 3.5.3). The Employer may establish and specify an efficiency
weighting formula to allow an optimal layout of the storage pump.
b) Method proposed to measure guaranteed efficiency:
– by model acceptance tests in the Contractor's laboratory or in another laboratory
acceptable to both parties using test results without step-up. In this case, the
guarantees have to be given for the model only (see clause
...

IEC TR 63018 ®
Edition 1.0 2015-12
TECHNICAL
REPORT
colour
inside
Flexible printed circuit boards (FPCBs) – Method to decrease signal loss by
using noise suppression materials

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IEC TR 63018 ®
Edition 1.0 2015-12
TECHNICAL
REPORT
colour
inside
Flexible printed circuit boards (FPCBs) – Method to decrease signal loss by

using noise suppression materials

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.180 ISBN 978-2-8322-3082-4

– 2 – IEC TR 63018:2015 © IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Test guideline . 6
3.1 Apparatus . 6
3.1.1 Network analyzer . 6
3.1.2 Block diagram for signal loss measuring . 6
3.2 Test specimen . 7
3.2.1 Structure . 7
3.2.2 Preparation . 8
3.2.3 Test method . 8
3.2.4 Calculation . 9
3.2.5 Test result . 9
3.2.6 Analysis . 12
3.3 Improvement method of signal loss for a shield FPCB . 13
Annex A (normative) Block diagram of signal loss test system . 14

Figure 1 – Bare/shield FPCB . 5
Figure 2 – Increment of signal loss using NSMs . 5
Figure 3 – Signal loss test system . 6
Figure 4 – Schematic diagram for two type of test specimen . 7
Figure 5 – Cross-section of shield FPCB . 8
Figure 6 – Difference of signal loss between bare and shield FPCBs . 9
Figure 7 – Signal loss value of the bare and shield FPCB . 10
Figure 8 – Signal loss variation according to the Cu conductive layer thickness . 11
Figure 9 – Signal loss variation according to the Cu signal line width . 11
Figure 10 – Two types of structure for FPCB . 12
Figure 11 – Electric field diagram for two types of shield FPCB . 13
Figure A.1 – Block diagram of signal loss test system . 14
Figure A.2 – Signal loss test system according to the Agilent network analyzer N5230A . 14

Table 1 – Comparison of cut-off frequency with bare/shild FPCB . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLEXIBLE PRINTED CIRCUIT BOARDS (FPCBs) – METHOD TO DECREASE
SIGNAL LOSS BY USING NOISE SUPPRESSION MATERIALS

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
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The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC TR 63018, which is a technical report, has been prepared by IEC technical committee 91:
Electronics assembly technology.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
91/1284/DTR 91/1309/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC TR 63018:2015 © IEC 2015
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
In recent years, since the use of smart phones, and other mobile and display devices has
increased significantly, the supply of FPCBs has also been largely extended. Specifically,
since the FPCB devices seek high speed performance, the requirements with respect to
electromagnetic interference (EMI) suppression in the devices has also grown in importance.
Therefore, FPCBs used inside smart phones employ noise suppression materials (NSMs) to
solve EMI problems, as shown in Figure 1.
IEC
Figure 1 – Bare/shield FPCB
However, an application of noise suppression materials (NSMs) for FPCBs reaches the limit
concerning the problem of incrementation of signal loss. Therefore, FPCB and NSMs
manufacturers need to analyse signal loss variations of FPCBs shielded by NSMs, as shown
in Figure 2.
Bare FPCB
Shield FPCB
Frequency (GHz)
IEC
Figure 2 – Increment of signal loss using NSMs
As FPCBs are used with high frequency, the problem of signal loss becomes more significant.
As the user of FPCBs has a demand for the lowest value of signal loss by using NSMs,
suppliers of FPCBs have to anticipate an appropriate design in order to achieve an adequate
signal loss value.
Transmission loss (dB)
– 6 – IEC TR 63018:2015 © IEC 2015
FLEXIBLE PRINTED CIRCUIT BOARDS (FPCBs) – METHOD TO DECREASE
SIGNAL LOSS BY USING NOISE SUPPRESSION MATERIALS

1 Scope
This Technical Report specifies a guideline for improvement of signal loss by using noise
suppression materials (hereafter referred to as NSMs) for FPCBs.
This Technical Report a
...