SIST IEC/TR 61366-5:1999

Hydraulic turbines, storage pumps and pump-turbines - Tendering Documents - Part 5: Guidelines for technical specifications for tubular turbines

IEC 62820-1-2:2017 specifies the technical requirements for the composition, functions, performance and test methods of building intercom systems using the internet protocol (IP), and it is a supplement to IEC 62820-1-1. This document is applicable to the IP building intercom systems for both residential and commercial buildings.

Systèmes d'interphone de bâtiment - Partie 1-2: Exigences du système - Systèmes d'interphone de bâtiment utilisant le protocole internet (IP)

L'IEC 62820-1-2:2017 spécifie les exigences techniques relatives à la composition, aux fonctions, aux performances, et aux méthodes d'essais des systèmes d'interphone de bâtiment utilisant le protocole internet (IP) et complète l'IEC 62820-1-1. Le présent document s'applique aux systèmes d'interphone de bâtiment IP pour les bâtiments résidentiels comme pour les bâtiments commerciaux.

Vodne turbine, akumulacijske črpalke in črpalne turbine – Razpisna dokumentacija – 5. del: Smernice za tehnične specifikacije cevnih turbin

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 62820-1-2:2017 - Building intercom systems - Part 1-2: System requirements - Building intercom systems using the internet protocol (IP)

Standards Content (Sample)

IEC 62820-1-2 ®
Edition 1.0 2017-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Building intercom systems –
Part 1-2: System requirements – Building intercom systems using the internet
protocol (IP)
Systèmes d'interphone de bâtiment –
Partie 1-2: Exigences du système – Systèmes d'interphone de bâtiment utilisant
le protocole internet (IP)
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IEC 62820-1-2 ®
Edition 1.0 2017-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Building intercom systems –
Part 1-2: System requirements – Building intercom systems using the internet

protocol (IP)
Systèmes d'interphone de bâtiment –

Partie 1-2: Exigences du système – Systèmes d'interphone de bâtiment utilisant

le protocole internet (IP)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.320 ISBN 978-2-8322-4548-4

– 2 – IEC 62820-1-2:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Functional requirements . 9
4.1 Basic functional requirements . 9
4.2 Additional functional requirements . 9
4.3 IP building intercom systems with SMU . 9
5 Performance requirements. 10
5.1 General . 10
5.2 Audio characteristics . 10
5.2.1 Audio delay . 10
5.2.2 Echo return loss . 10
5.2.3 Audio switching time . 10
5.3 Video characteristics . 10
5.3.1 General . 10
5.3.2 Image resolution . 10
5.3.3 Frame rate . 11
5.3.4 Video delay . 11
5.3.5 Lip sync . 11
5.3.6 Image quality . 11
5.4 Network and information security . 11
5.4.1 Network access control . 11
5.4.2 Data integrity protection . 11
6 Test methods . 11
6.1 Test conditions . 11
6.1.1 Environmental conditions . 11
6.1.2 Electrical connection . 11
6.2 Function test . 11
6.3 Test of audio characteristics . 12
6.3.1 Test requirements . 12
6.3.2 Test of audio delay . 12
6.3.3 Test of echo return loss . 13
6.3.4 Test of audio switching time. 14
6.4 Test of video characteristics . 15
6.4.1 General conditions . 15
6.4.2 Test conditions . 15
6.4.3 Image resolution test . 16
6.4.4 Frame rate test . 16
6.4.5 Video delay test . 16
6.4.6 Lip sync test . 16
6.4.7 Subjective image quality assessment . 17
6.5 Network security test . 17

6.5.1 Network test system . 17
6.5.2 Network access control test . 17
6.5.3 Data integrity protection test . 17
7 Documentation . 17
Annex A (normative) Subjective assessment of the IP BIS image quality . 18
A.1 Test setup . 18
A.2 Regulation for experimental actions . 18
A.3 Evaluation scoring . 19
Annex B (normative) Subjective assessment of echo return loss . 20
B.1 Test setup . 20
B.2 Evaluation scoring . 20
Bibliography . 21

Figure 1 – Test configuration of echo return loss and audio switching time diagram . 12
Figure 2 – Four groups of CSS signals . 13
Figure 3 – Test signal A . 14
Figure 4 – Test signal B . 14
Figure 5 – Audio switching time test process . 15
Figure 6 – Lip sync test signal . 17
Figure 7 – Test method diagram . 17
Figure A.1 – Test setup diagram . 18

Table A.1 – Image quality 5-point evaluation form . 19
Table B.1 – Subjective echo return loss evaluation form . 20

– 4 – IEC 62820-1-2:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BUILDING INTERCOM SYSTEMS –
Part 1-2: System requirements –
Building intercom systems using the internet protocol (IP)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). 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
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62820-1-2 has been prepared by IEC technical committee 79: Alarm
and electronic security systems.
The text of this International Standard is based on the following documents:
FDIS Report on voting
79/577/FDIS 79/589/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62820 series, published under the general title Building intercom
systems, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 62820-1-2:2017 © IEC 2017
INTRODUCTION
The IEC 62820 series of standards set out the technical requirements for the composition,
functions, performance, and test methods of building intercom systems for building entry and
application guidelines and consist of five parts:
Part 1-1: System requirements – General;
Part 1-2: System requirements – Building intercom systems using the internet protocol (IP);
Part 2: Requirements for advanced security building intercom systems;
Part 3-1: Application guidelines – General;
Part 3-2: Application guidelines – Advanced security building intercom systems.

BUILDING INTERCOM SYSTEMS –
Part 1-2: System requirements –
Building intercom systems using the internet protocol (IP)

1 Scope
This part of IEC 62820 specifies the technical requirements for the composition, functions,
performance and test methods of building intercom systems using the internet protocol (IP), and
it is a supplement to IEC 62820-1-1.
This document is applicable to the IP building intercom systems for both residential and
commercial buildings.
NOTE A BIS that has a mixture of IP and non-IP connections is not covered by IEC 62820-1-2 but covered by
IEC 62820-1-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62820-1-1:2016, Building intercom systems – Part 1-1: System requirements – General
ITU-T P.501, Test signals for use in telephonometry
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the definitions given in IEC 62820-1-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
audio delay
audio latency
one way delay (OWD) time of the transmitted audio signal from the microphone of one intercom
unit through other components in the system to the loudspeaker of other intercom unit
3.1.2
audio switching time
time, from one transmission direction to the other measured from the removal of the signal in the
first direction until the level in the second direction reaches 3 dB below its final value

– 8 – IEC 62820-1-2:2017 © IEC 2017
3.1.3
echo return loss
ability of the local intercom unit to avoid retransmitting the audio signal received from the far
intercom unit back again to it
3.1.4
intercom unit
devices that are able to establish an audio connection or an audio and video connection between
each other (SMU, VCU and URU) and are specifically designed to be a component of a BIS
Note 1 to entry: Devices which can be connected to IP transmission network such as smartphones or tablets are not
considered as intercom units.
3.1.5
Internet Protocol
IP
network layer-3 protocol in the OSI model containing addressing and control information to
enable data packets to be routed in a network and primary network layer protocol in the TCP/IP
protocol suite according to IETF RFC 791 and IETF RFC 2460 and any subsequent evolution
3.1.6
IP transmission network
communication network used to achieve the relevant functions of IP BIS, such as data
transmission and control
3.1.7
lip sync
temporal relationship between transmitted audio signal and video signal
Note 1 to entry: Lip sync value is used to demonstrate the relationship between audio and video signal
synchronization.
3.1.8
single talk
type of non simultaneous 2 way speech in which two parties communicate by alternating speech
spurts without interrupting each other
3.1.9
double talk
type of non simultaneous 2 way speech in which two parties communicate by alternating
speech spurts in which both parties may interrupt each other
3.1.10
subjective image quality assessment
method where people, as observers, evaluate the image quality
Note 1 to entry: Test environment, observer and evaluation method shall comply with certain standards, in the same
way the methodology for the subjective assessment of the quality of the television pictures adopted ITU-R
BT.500-13-(01/2012).
3.1.11
video delay
one way delay (OWD) time of the transmitted video signal from the camera of one intercom unit
through other components to the display on the other intercom unit
3.2 Abbreviated terms
ACR absolute category rating
BIS building intercom system
CSS composite source signal
DCR degradation category rating
EUT equipment under test
FPS frames per second
FR frame rate
IP Internet protocol
LED light-emitting diode
LIG LED image generator
LRGP loudness rating guard-ring position
MRP mouth reference point
OSI open systems interconnection
OWD one way delay
PSG programmable signal generator
QoS quality of service
SMU security management unit
TVL television lines
URU user receiver unit
VCD video capture device
VCU visitor call unit
VRD video receiver device
4 Functional requirements
4.1 Basic functional requirements
Basic functional requirements of IP BIS shall comply with the requirements specified in
IEC 62820-1-1:2016, 4.1.
4.2 Additional functional requirements
In addition to the additional functional requirements specified in IEC62820-1-1:2016, 4.2, an IP
building intercom system may comply with the following requirements:
a) Intercom unit to intercom unit speech
URU may be able to make addressing calls to other URU and conduct two-way speech.
b) Voice message function
IP building intercom system may allow the caller to leave voice messages from the VCU.
c) Intercom unit to intercom unit video and speech
URU may be able to conduct two-way video and audio communication with other URU.
d) Video and voice messages function
IP building intercom system may allow the caller to leave video and voice messages from the
VCU.
4.3 IP building intercom systems with SMU
In addition to the functional requirements specified in 4.1 and 4.2, IP building intercom systems
with SMU may comply with the following requirements:
a) Automatic detection of device status
The SMU may detect the status of other devices in the system.

– 10 – IEC 62820-1-2:2017 © IEC 2017
b) Remote configuration and update
The SMU may remotely configure the operating mode of the devices and update the firmware
and software of the devices.
c) Image storing and replaying function
When the URU with video function is communicating with an SMU equipped with a camera,
it may be able to store and replay the images captured by the SMU.
5 Performance requirements
5.1 General
The performance requirements of IP BIS shall comply with the requirements specified in
IEC 62820-1-1:2016, Clause 5.
The following requirements shall be fulfilled when the intercom devices are linked in a local
network, wired or wireless. In case some devices are linked through a public network (i.e.
Internet), where it is not possible to guarantee QoS, the requirements do not apply.
5.2 Audio characteristics
5.2.1 Audio delay
Audio delay between two intercom units shall not be more than 300 ms.
5.2.2 Echo return loss
This requirement may be evaluated in two ways.
1) Objective evaluation
Hands-free units: the echo return loss shall not be less than 45 dB.
Handset unit: the echo return loss shall not be less than 46 dB.
NOTE Non-simultaneous systems are evaluated by subjective test.
2) Subjective evaluation
The subjective evaluation of echo return loss shall be not less than 3 points.
5.2.3 Audio switching time
The audio switching time shall not be more than 200 ms.
NOTE This requirement does not apply to simultaneous talk and single talk BIS.
5.3 Video characteristics
5.3.1 General
Video characteristics of IP BIS shall comply with the requirements specified in
IEC 62820-1-1:2016, 5.2.2 to 5.2.5 and the following.
5.3.2 Image resolution
Image resolution (measured at the centre of the image) of IP BIS shall not be less than 130 TVL
for the visible area smaller than 4,0 inch (10,16 cm), not be less than 240 TVL for the visible
area equal or larger than 4,0 inch (10,16 cm) and smaller than 7,0 inch (17,78 cm), and not be
less than 320 TVL for the visible area of 7,0 inch (17,78 cm) or larger.

5.3.3 Frame rate
Frame rate of digital video signals shall not be less than 15 FPS.
5.3.4 Video delay
The unit-to-unit video delay shall not be more than 300 ms.
5.3.5 Lip sync
Relative time difference of video and audio signal concurrent transmission should be between
–185 ms and +90 ms.
NOTE This only applies to Audio-Video systems and not to audio only systems.
5.3.6 Image quality
Images shall not present obvious phenomenon as image blur, mosaic effect or image fracture.
The average subjective image quality assessment shall not be less than 3 points.
5.4 Network and information security
5.4.1 Network access control
When a user or device accesses the network of IP BIS or manages the system, the system shall
identify the user or device, determine if access is granted as well as the access right.
Identification ways can vary, measures other than identification may be used provided that they
protect the system from unauthorized access.
5.4.2 Data integrity protection
The IP BIS may detect the integrity of the users’ alarm and unlocking control data. It also may
offer protection for the integrity of the users’ data by encryption or other ways.
6 Test methods
6.1 Test conditions
6.1.1 Environmental conditions
Temperature: 15 ºC to 35 ºC.
Relative humidity: 25 % to 75 %.
Atmospheric pressure: 86 kPa to 106 kPa.
6.1.2 Electrical connection
The EUT shall be connected according to the manufacturer’s recommendations for the basic
configuration of the test. The EUT configuration should meet the requirements to realize the
system functions.
6.2 Function test
The EUT shall be operated according to the product instruction manual. The functions of the
system shall be checked item by item and shall comply with the requirements specified in
Clause 4.
– 12 – IEC 62820-1-2:2017 © IEC 2017
6.3 Test of audio characteristics
6.3.1 Test requirements
Unless otherwise stated, test conditions shall comply with the requirements as specified in
IEC 62820-1-1:2016, Clause A.1, and the additional below requirements:
a) The CSS signal defined by ITU-T P.501 shall be adopted. It is recommended to use 48 kHz
sampling rate sequence of pseudo random noise. Every CSS signal consists of 248,62 ms
excitation signal and 101,38 ms pause. The average sound pressure generated by the test
signal in MRP should be –4,7 dB Pa.
b) When testing the echo return loss and audio switching time it is required to measure the
audio transmission at both ends. The center of both the artificial mouth and the standard
half-inch (1,27 cm) free field microphone shall point towards the center of the EUT with
16 degree deviated from the central axis of the EUT as show in Figure 1. In case of handset
unit the supporting panel shall be replaced by fixing the artificial mouth and standard
half-inch (1,27 cm) free field microphone at the LRGP.
Dimensions in metre
Standard half-inch
free field
Artificial
Acoustic
microphone
Audio
mouth
measurement
Hands-free
Hands-free
oscillator
analyzer
unit
unit
R0,1
R0,1
System
16° 16°
Equalized sound source
network
Equalized sound source
16°
16°
Standard
Supporting
Supporting
Acoustic
half-inch
panel
panel
Audio
measurement
free field
Artificial
oscillator
analyzer
microphone
mouth
IEC
Figure 1 – Test configuration of echo return loss
and audio switching time diagram
6.3.2 Test of audio delay
The test signal consists of four groups of CSS signals (see Figure 2). The first three groups of
CSS signals are used for training, which makes the channel stable. The continuously excitation
signal of the fourth CSS signal is used for audio delay measuring.
The audio signal generator shall generate the CSS test signal through the artificial mouth to
initiate the audio in the local terminal. Use an audio analyser to compare the time difference
between the fourth pulse of the test signal and the test signal transmitted through the BIS from
terminal to terminal. The time difference is the audio delay.
The test should consist of 10 measurements. Each time the communication should be
reconnected. The average value of 10 measurements is the audio delay result. The test result
should meet the requirements of 5.2.1.

Signal for measurement
248,62 ms
101,38 ms
1 298,62 ms
IEC
Figure 2 – Four groups of CSS signals
6.3.3 Test of echo return loss
6.3.3.1 Objective test of echo return loss
a) The test environmental noise shall not exceed 30 dB(A). It is recommended to conduct the
test in a full-anechoic chamber or semi-anechoic chamber. If EUT has volume control, it
shall be set to the maximum level before the Larsen effect appears. The CSS test signal
illustrated in Figure 2 shall be used. During the test, the communication of EUT shall not be
interrupted.
b) The total time of two-way point-to-point audio delays, T, shall be tested separately and
recorded according to 6.3.2. If the total time of the two-way transmission of the EUT is less
than 100 ms, there is no need to do this test.
c) The audio signal generator shall generate the CSS test signal through the artificial mouth to
initiate audio in the local terminal. Test signal is transmitted from the local unit to the remote
unit. When the test signal returns back it is measured by the microphone at the local unit
after a delay T.
d) Use an acoustic measurement analyser in 1/3 octave frequency interval to measure and
record the ear bearing pressure Pi of the last 100 ms from the fourth CSS signal group within
200 Hz to 4 000 Hz. The echo return loss at the remote unit shall be calculated by
differentials between sound pressure of the MRP at the sending unit and the voice signal
average sound pressure from the remote unit, using the following formula
Echo loss=−4,7− 20lg Pi
∑
i=4
where
i is the serial number of frequency. The corresponding central frequency shall comply
with IEC 62820-1-1:2016, Table A.1;
Pi is the average sound pressure on the frequency bandwidth.
e) Based on the test method mentioned in c) to d), repeat the test measurement for 10 times
continuously and take the average as the test result that shall meet the requirements of
5.2.2.
NOTE The suggested interval between two measurements is over 1,5 s.
6.3.3.2 Subjective evaluation of echo return loss
Subjective evaluation of echo return loss shall be conformed according to Annex B.

– 14 – IEC 62820-1-2:2017 © IEC 2017
6.3.4 Test of audio switching time
a) This test shall use two groups of test signals A and B. Test signal A shall use 10 continuous
CSS signals, where the duration shall be longer than the expected time that the single
direction transmission of BIS can become stable (see Figure 3). Test signal B shall consists
of four CSS signals, the first pulse of the CSS signal is used for measurement (see Figure 4).
b) Figure 5 shows the audio switching time progress. Separately measure the audio time delay
from one terminal to the other in both directions based on the test method specified in 6.3.2.
c) The audio signal generator shall generate test signal A through the artificial mouth to initiate
the audio transmission in the local terminal and record the initial time. When the remote
th
terminal finishes playing the 10 CSS pulse the MRP of the remote terminal shall generate
the test signal B.
d) Use microphone in the local terminal to record the output signal coming from the remote
terminal and measure the time, T , from the start of the first CSS signal B until it reaches
DS
3 dB below the average normal audio transmission amplitude. The audio switching time T is
S
calculated by the difference between T and T . The test result shall meet the
DS D2
requirements of 5.2.3.
Signal for measurement
248,62 ms
9 10
1 2
101,38 ms
3 398,62 ms
IEC
Figure 3 – Test signal A
Signal for measurement
248,62 ms
101,38 ms
1 298,62 ms
IEC
Figure 4 – Test signal B
T
D1
Test signal A
Microphone in local terminal
Speaker in remote terminal
T T
D1 A
T
D2
Test
Signal B
Microphone in remote terminal
T
D2
Speaker in local terminal
(assuming T = 0)
s T
S
3 dB
T
D2
Speaker in local terminal
T
DS
IEC
Key
T Delay time of testing signal from local terminal to remote terminal
D1
T Delay time of testing signal from remote terminal to local terminal
D2
T Audio switching time
s
Figure 5 – Audio switching time test process
6.4 Test of video characteristics
6.4.1 General conditions
Test conditions of 5.3 specified in IEC 62820-1-2 shall conform to the requirements as specified
in Clause B.1 of IEC 62820-1-1:2016, and the test conditions of 6.4.3 to 6.4.6 should conform to
6.4.2.
6.4.2 Test conditions
Unless stated, environmental noise at the test site shall not exceed 40 dB(A).
Video characteristic tests should use a LED image generator (LIG) as test signal resource.
The LED image generator (LIG) consists of 10 × 10 LEDs matrix and a programmable signal
generator (PSG). The LED matrix is used to generate stroboscopic images. The PSG will control
the LED matrix to generate the appropriate pattern; a single LED as a basic unit is activated
every time and it shall be able to roll horizontally and then vertically. The LIG test unit shall be
equipped with two falling edge synchronous outputs interface. In order to avoid that audio signal
affects the video test, it is suggested that LIG is able to control two identical LED matrixes
simultaneously. LED matrix A is placed in front of the VCD camera as the test signal source; LED
matrix B is placed close to the VRD where a digital video camera can capture pictures of both the
VRD display and LED matrix B.
By adjusting the distance between the LED matrix and VCD, the LED matrix image shall fill out
the display on VRD for both vertical and horizontal axis and stay focused.
Additionally, a digital video camera shall be used with adjustable frame rate and support
external synchronize signal input function.

– 16 – IEC 62820-1-2:2017 © IEC 2017
6.4.3 Image resolution test
Test methods specified in IEC 62820-1-1:2016, Clause B.3 shall be followed. The test results
shall comply with the requirements set forth in 5.3.2.
6.4.4 Frame rate test
a) The test signal shall be generated by continuously activating the 10 horizontal LEDs at the
centre of the LIG device.
b) Adjust the frequency of the LIG (f) from 1 Hz (each led is activated once every second with
a flash time of 1/ (10f) s) upward so the 10 LEDs will light up one by one horizontally
according to the frequency set. Watch the image on the VRD and stop increasing the
frequency of the LIG when the LEDs appear to stop moving on the VRD. This state shall be
maintained over 10 s without any drop to ensure its validity.
c) Record the value of frequency on the LIG. This value is the frame rate (fr). The test result
shall conform to the requirements set forth in 5.3.3.
6.4.5 Video delay test
a) This test should be carried out after 6.4.4, using the frame rate (fr) of EUT as the frequency
f of LIG. Use the continuously changing image generated by the LIG on the 10 × 10 LED
matrixes as the test signal.
b) The tested VCD shall capture the image generated by LIG A. At the receiver end, a digital
video camera shall continuously capture image frames, with a frame rate fr during 3 s, of the
received video image on the VRD display together with the image generated by LIG B.
c) For each captured image frame within the 3 s, compare the location of active LED on the LIG
B and on the VRD display in the same frame and count the number of the LEDs (n) difference
between them. Video delay of this picture is (1 000 × n) / fr (ms).
d) Filter the values discarding the 10 % of higher values. The resulting highest value is the
video delay. The test result shall conform to the requirements set forth in 5.3.4.
NOTE If the BIS is able to mute audio or reduce audio volume to avoid Larsen effect the test can be conducted with
only one LED matrix, locating it in front of the VCD and beside the VRD. It will represent LIG A or B indistinctly in the
test description.
6.4.6 Lip sync test
The test condition and method should meet the requirements of both 6.3.2 and 6.4.5.
The audio signal generator plays ten groups of test signals, each one with four CSS pulses
(Figure 6), and each group separated by a pause of 400 ms, with a total test signal length of
16 586,2 ms. The first three CSS signals in each group are used for training; the fourth will be
used to measure the audio delay (as described in 6.3.2) and also to trigger, in the falling edge,
the digital video camera to capture one image simultaneously. Therefore a measurement of
audio delay and video delay are taken at the end of every group test signal, i.e. 10
measurements in total.
Calculate the video delay according to the video delay method (6.4.5).
Calculate the audio delay according to the audio delay method (6.3.2).
Pair the audio and video delay measurements that are synchronously captured and calculate:
Lip sync = video delay – audio delay
(A positive value means that audio is advanced with respect to video).
Filter the values of lip sync measurements discarding the highest and lowest values. The rest of
the values shall conform to the requirements set forth in 5.3.5.

Signal for measurement
Group 2
Group 1 Group 3 Group 10
400 ms
IEC
Figure 6 – Lip sync test signal
6.4.7 Subjective image quality assessment
Subjective image quality assessment shall be carried out as described in Annex A.
6.5 Network security test
6.5.1 Network test system
The network test system is shown in Figure 7.
Equipment required
Network switch
EUT
for EUT test
IEC
Figure 7 – Test method diagram
6.5.2 Network access control test
Identification should be prior to when users access the IP BIS. The system only offers functional
operation for authorized users. The test result should satisfy the requirements as specified in
5.4.1.
6.5.3 Data integrity protection test
Adopt a network protocol analyser software (such as a software packet sniffer) to capture
communicating data packets. It will be checked whether the IP BIS is equipped with measures
such as encryption, digital signature and Hash function to detect the integrity of the users data
storage and the alarm and unlocking control data. The test result should satisfy the requirements
as specified in 5.4.2.
7 Documentation
The documentation of the IP BIS shall comply with the requirements specified in
IEC 62820-1-1:2016, Clause 7.
– 18 – IEC 62820-1-2:2017 © IEC 2017
Annex A
(normative)
Subjective assessment of the IP BIS image quality
A.1 Test setup
The test can be arranged as shown in Figure A.1. Specified methods are as follows:
Laboratory
VRD Scoring
VCD
IP network
person
person
(Camera) (Display)
IEC
Figure A.1 – Test setup diagram
a) The tested system can consist of the VCU, URU, SMU and IP transmission network.
b) There shall be at least one laboratory person taking part in the test. The number of scoring
persons shall not be less than three skilled persons.
c) The laboratory person shall look at the camera of the VCD horizontally, with a suitable
distance between 30 cm and 50 cm.
d) The scoring person shall look at the display of the VRD horizontally, with a suitable distance.
e) The test actions as ruled by the laboratory person include at least the following: greetings,
self-introduction, show identity cards and thank you. The above operation will be repeated at
least three times.
f) Scoring values are intro
...

SLOVENSKI STANDARD
01-april-1999
9RGQHWXUELQHDNXPXODFLMVNHþUSDONHLQþUSDOQHWXUELQH±5D]SLVQDGRNXPHQWDFLMD
±GHO6PHUQLFH]DWHKQLþQHVSHFLILNDFLMHFHYQLKWXUELQ
Hydraulic turbines, storage pumps and pump-turbines - Tendering Documents - Part 5:
Guidelines for technical specifications for tubular turbines
Ta slovenski standard je istoveten z: IEC/TR 61366-5
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
61366-5
First edition
1998-03
Hydraulic turbines, storage pumps
and pump-turbines –
Tendering Documents
Part 5:
Guidelines for technical specifications
for tubular turbines
Turbines hydrauliques, pompes d'accumulation
et pompes-turbines –
Document d'appel d'offres –
Partie 5:
Guide des spécifications techniques pour
les turbines tubulaires
 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 – 61366-5 © IEC:1998(E)
CONTENTS
Page
FOREWORD . 4
Clause
0 Introduction to technical specifications .
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. 13
3.6 Mechanical design criteria . 16
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 Bulb structure and hatch cover. 20
4.2 Stay ring (if employed in design) . 21
4.3 Discharge ring . 21
4.4 Draft tube and draft tube liner . 22
4.5 Upstream and downstream pressure taps and pipes. 22
5 Technical specifications for stationary/removable components . 22
5.1 Inner and outer rings . 22
5.2 Guide vanes . 22
6 Technical specifications for guide vane regulating apparatus. 23
6.1 Servomotors . 23
6.2 Connecting rods . 23
6.3 Regulating ring . 23
6.4 Guide vane linkage . 23
6.5 Guide vane overload protection. 23
6.6 Locking devices. 24
6.7 Counter weight . 24
7 Technical specifications for rotating parts, bearings, seals and gear box (if used). 24
7.1 Runner . 24
7.2 Runner blade regulating apparatus . 24
7.3 Main shaft . 25

61366-5 © IEC:1998(E) – 3 –
7.4 Turbine guide bearing. 26
7.5 Main shaft seal . 26
7.6 Standstill (maintenance) seal . 26
7.7 Gearbox (if used). 26
8 Technical specifications for thrust and counter-thurst bearing. 27
8.1 Design data . 27
8.2 Bearing support . 27
8.3 Bearing assembly . 27
9 Technical specifications for miscellaneous components . 27
9.1 Walkways, access platforms and stairs . 27
9.2 Lifting fixtures. 28
9.3 Special tools. 28
9.4 Standard tools . 28
9.5 Nameplate. 28
10 Technical specifications for auxiliary systems. 28
10.1 Bearing lubrication system . 28
10.2 Turbine drainage . 28
10.3 Lubrication – guide vane regulating system . 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 – 61366-5 © IEC:1998(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES –
TENDERING DOCUMENTS –
Part 5: Guidelines for technical specifications
for tubular turbines
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 61366-5, which is a technical report of type 3, has been prepared by IEC technical
committee 4: Hydraulic turbines.

61366-5 © 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 61366-5 is one of a series which deals with Tendering documents for
hydraulic 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 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).

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
61366-5 © IEC:1998(E) – 7 –
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES –
TENDERING DOCUMENTS –
Part 2: Guidelines for technical specifications
for tubular turbines
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"; 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 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 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 tubular turbine specifications include technical specifications
for the following:
– Design conditions: Project arrangement, hydraulic conditions, mode of operation, generator
characteristics, transient behaviour data, stability of the system, noise, vibration, pressure
fluctuations and safety requirements.
– Technical performance and other guarantees:
ypower;
ydischarge;
yefficiency;
ymaximum momentary pressure;
yminimum momentary pressure;
ymaximum momentary overspeed;
ymaximum steady-state runaway speed;

– 8 – 61366-5 © IEC:1998(E)
ycavitation pitting;
yhydraulic thrust;
ymaximum weights and dimensions for transportation, erection and maintenance.
– Mechanical design criteria: design standards, stresses and deflections and special design
considerations.
– Design documentation: Contractor’s input needed for the Employer's design, the
Contractor's drawings and data, Contractor's review of the Employer's design and technical
reports by Contractor.
– Materials and construction: material selection and standards, quality assurance procedures,
shop methods and personnel, 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: generator hatch cover or pit, stay ring, discharge ring (if
any), draft tube, draft tube liner foundations anchorage, upstream and downstream
pressure taps and pipes.
– Stationary/removable components: bulb nose, generator access shaft inner and outer guide
rings and guide vanes.
– Regulating apparatus: servomotor, counterweight, connecting rods, regulating ring, guide
vane linkage, system, guide vane overload protection and locking devices.
– Rotating parts, bearings and seals: runner, main shaft, guide bearing, main shaft seal, oil
head and runner blade regulation system with servomotor assembly with oil supply, linkage
system, crosshead and oilhead.
– Thrust and counter-thrust bearing: bearing support, thrust collar and counter-thrust bearing
pads and rings, oil sump and instrumentation.
– Gear box: gear box and related components.
– Miscellaneous components: walkways, platforms, lifting fixtures, special tools, standard
tools and nameplate.
– Auxiliary systems: water supply to main shaft seal, turbine drainage, lubrication-guide vane
regulating system, and oil supply to bearings.
– Instrumentation: controls, indication and protection.
– Spare parts: basic spare parts.
– Model acceptance tests: test requirements.
– Site installation and commissioning test: installation procedures and commissioning.
– Field acceptance tests: scope of field test scope and reports and 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 the
control system, relief valves, or high and low pressure slide valves or gates which, at the
Employer's option, may be included in the Tendering documents for the turbine or may be
specified in separate documents.
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 guide vane 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 gear box;

61366-5 © IEC:1998(E) – 9 –
6.8 Technical specifications for miscellaneous components;
6.9 Technical specifications for auxiliary systems;
6.10 Technical specifications for instrumentation;
6.11 Spare parts;
6.12 Model acceptance tests
6.13 Site installation and commissioning
6.14 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 tubular turbines.
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 60308:1970, International code for testing of speed governing systems for hydraulic
turbines
IEC 60545:1976, Guide for commissioning, operation and maintenance of hydraulic turbines
IEC 60609:1978, Cavitation pitting evaluation in hydraulic turbines, storage pumps and pump-
turbines
IEC 60994:1991, Guide for field measurement of vibrations and pulsations in hydraulic
machines (turbines, storage pumps and pump turbines)
1)
IEC 61362, Guide to specification of hydro-turbine control systems
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
conferred upon the Contractor. The general statement of scope of work presented in
2)
TD subsection 2.1 (5.1 ofIEC 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 of 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 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.
___________
1)
To be published.
2)
All references to Tendering documents (TD) apply to annex A of IEC 61366-1.

– 10 – 61366-5 © IEC:1998(E)
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 Six (6) complete bulb type Kaplan turbines each with a specified power of not less than
10 200 kW at the shaft coupling under a specified hydraulic energy of 98 J/kg (specified
head of 10 m);
2 Turbine model testing;
3 Tools, slings and handling devices required for maintenance of the turbines;
4 Transportation and delivery to site;
5 Site installation, commissioning, and acceptance testing of the turbines;
6 Preparation and submission of operation and maintenance manual and training of
Employer's operating and maintenance staff in 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 describe the
limits of the contract considering the following:
– details and location of the upstream high-pressure reference section;
– responsibility for connection of high-pressure reference section at site;
– details and location of the downstream low-pressure reference section;
– details and location of the upstream termination of the water passage liner;
– details and location of the downstream termination of the draft tube liner;
– orientation and location of the turbine/generator shaft flange interface;
– responsibility for flange coupling bolts, nuts and nut guards at generator/turbine coupling,
including drilling jig;
– responsibility for bolts, nuts, gaskets at piping termination;
– termination of governor piping;
– termination of drainage piping;
– termination of bearings lubricating oil piping;
– termination of shaft seal piping (if any);
– termination points and junction boxes for wiring power, control, indication, protection, and
lighting;
– compressed air for service and other functions.
NOTE – Contract limits will change considerably if other major items of equipment (such as speed governor system,
turbine downstream gate, generators, excitation systems, control metering and relaying systems, switchgear, and
power transformers) are included with the turbine 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 should be
considered:
– services during site installation and testing;
– temporary enclosures for site storage of turbine parts or for erection;
– installation in primary concrete of small items provided by the Contractor, such as anchors,
sole plates, and piping provided by the Contractor;

61366-5 © IEC:1998(E) – 11 –
– concrete for embedment of turbine components - supply, placement and control including
monitoring and verification during and after concrete placement by others;
– grout injection, if required, either within or around turbine components;
– powerhouse crane and operator;
– connections to powerhouse air, oil and water piping systems;
– supply of filtered water for turbine 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, bearing and governor 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 the Employer supplied items and
services are to be provided by the Contractor 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 waterways at the low
and high-pressure sides such as channels, galleries, penstocks, gear box, valves/gates, 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 detailed design.
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 waterways.
3.4.2 Hydraulic conditions
This subclause should present the hydraulic conditions under which the Employer proposes to
operate the completed facility such as:
– range of specific hydraulic energy (head) of the plant;
– specific hydraulic energy losses between headwater level and high-pressure reference
section of the machine (E );
L 3-1
– specific hydraulic energy losses between the low-pressure reference section and tailwater
level (E );
L 2-4
– specific hydraulic energy (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;
– power values in the range of specific hydraulic energy (head);
– maximum specific hydraulic energy (head) for runaway speed guarantee;
– range of water temperatures;
– water quality analysis (chemical, biological, corrosive nature and suspended solids); and
– range of ambient temperatures and humidity (tropical or extreme cold environment needs to
be clearly defined).
– 12 – 61366-5 © IEC:1998(E)
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
operation, e.g. base load, peaking or sluice 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 spinning reserve, isolated and black
start operations, etc.
b) Power (P), Specific Hydraulic Energy (E) [Head (H)], and Discharge (Q): The specified
specific hydraulic energy (head) and discharge of the machine are determined from an
analysis of available discharge, specific hydraulic energy (head) of the plant and hydraulic
losses external to the machine with respect to statistical duration (refer to 2.3 to 2.6 of
IEC 61366-1). Relevant power can be established from a predetermined value efficiency.
If the range of specific hydraulic energy is wide, more than one specified value for E, Q and
P may need to be selected to define the operational range of the machine.
In the case of an unregulated turbine and if there are any limitations on maximum discharge
at any specific hydraulic energy (head), the Employer shall provide adequate data in the
technical specifications to enable the Contractor to optimize turbine design while respecting
these limitations.
c) Speed: The choice of speed of the unit has an impact on turbine, and generator costs, on
the setting of the turbine with respect to tailwater levels and on powerhouse costs.
If permitted by the project schedule, the approximate cost per meter of powerhouse setting
(see annex B, clause B.3), and the approximate cost per kVA for various possible speed
options for the generator should be specified by the Employer in the ITT (subsection 1.1.15)
so that the Tenderer may quote the turbine which best suits site conditions and its 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 turbines and
generators to fix a preferred speed; alternative proposals may be invited in the instructions
to Tenderers.
d) Direction of rotation: The direction should be specified clockwise or counter-clockwise
looking from the generator toward the turbine.
3.4.4 Generator characteristics
The specifications should state the principal characteristics of the generators to which the
turbines will be coupled. For example:
– capacity (kVA);
– power factor;
– frequency (normal and exceptional range);
– inertia or flywheel effect of generator;
– preferred speed (if established);
– preferred bearing arrangement (if established);
– approximate rotor diameter (if available).
3.4.5 Transient behaviour data
The Employer should, during preliminary design phase of the project and prior to turbine
selection, determine the various factors relating to power acceptance and power rejection by
the turbine. These factors may include:
– acceptable variation in electrical system frequency;
– inertia of the rotating parts or mechanical starting time;
– velocity of pressure waves (sound velocity in the water passages);

61366-5 © IEC:1998(E) – 13 –
– details of high-pressure and low-pressure conduits for the turbine;
– water starting time;
– turbine guide vane opening and closing times;
– transient pressure variations in the turbine;
– transient pressure variations in the turbine draft tube;
– limitation of sudden decrease of discharge with respect to surge control.
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 the Contractor. (Refer to guarantees in 3.5.5 and 3.5.6.)
3.4.6 Stability of the system
The hydro-turbine control system should be specified in accordance with IEC 61362. The
performance of the hydro-turbine control system should be specified according to IEC 60308.
The Employer should furnish the information necessary to predict possible resonance in the
water passages of the power plant and in the unit. Admissible limits may be specified for
fluctuations of turbine shaft torque and of pressure in the draft 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 the 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.
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 60944 together with suitable standards or 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
turbine. These requirements are, in addition to the general safety, related items outlined in 5.6
of IEC 61366-1.
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 outlined in Part 1, annex E of this guide, should be read in
conjunction with IEC 60041.
– 14 – 61366-5 © IEC:1998(E)
The main steady-state hydraulic performance guarantees (i.e. power, discharge, efficiency and
runaway speed) may be verified by model tests or by field acceptance 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 (refer to IEC 60193).
The Employer should establish and specify the essential 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-ordination of the interaction between the machine
and the external waterways under transient and steady-state oscillating 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 different 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 Tenderers present and state their 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 electrical system.
When it is necessary to include other aspects of the machine under performance guarantees
(such as stability, noise, and vibration), the Employer should include these provisions at the
end of this section taking into consideration that available data may not be sufficient, based on
extended experience. In any event, conditions under which guarantees are to be evaluated
shall be specified.
3.5.2 Guaranteed power
In specifying the guarantee for power, refer to TD subsection 6.1.4.3 of the specified
conditions, and state clearly the basis of the guarantee.
It is necessary in this subclause to establish the contractual obligations of the Contractor if the
guaranteed power is not met. The method(s) of measurements, method of comparison with
guarantees and application of IEC 60041 shall be defined.
3.5.3 Guaranteed minimum discharge
In some cases, it may be necessary to specify guaranteed requirements for a particularly low,
continuous and stable discharge. The Employer should indicate the expected duration of
operation and any special discharge conditions. The method of measurement should be
specified.
3.5.4 Guaranteed efficiency
The Employer shall establish and specify:
a) basis of guarantee; model or prototype;

61366-5 © IEC:1998(E) – 15 –
b) method proposed to measure guaranteed efficiency
– by model acceptance tests in Contractor's laboratory or in another laboratory acceptable
to both parties using test results with a mutually agreed step-up formula (see
IEC 60193), or
– by field acceptance tests of one or more prototype turbines (see IEC 60041);
c) Efficiency weighting formula to allow Tenderer to optimize the guaranteed efficiency in the
normal operating range of the turbine with respect to both power and specific hydraulic
energy (head), while taking into consideration the value specified by the Employer for gain
or loss in efficiency (refer to annex B of IEC 61366-1);
d) applicable codes (see 2.1 of IEC 61366-1);
e) measurement methods and preliminary estimated measurement uncertainties to be
contractually applied if different than those established by relevant IEC publications;
f) contractual consequences, if any, of the Contractor's failure to fulfil the guaranteed
efficiency or of Contractor exceeding the guaranteed efficiency (penalty or premium).
The technical data sheets of the tender forms should provide space for the Tenderer to record
the guaranteed weighted efficiency.
In large multi-unit projects which justify the expense, the Employer may choose to preselect
two or more competing Tenderers for the performance of turbine model tests at the Employer's
expense. In this event, the results of the model tests can be used in the final award of the
Contract to the successful Tenderer.
3.5.5 Guaranteed maximum/minimum momentary pressure
It is usual for the Contractor to guarantee momentary pressure even when there is no
contractual responsibility for complete design of the plant. (Refer to Part 1, annex E, E.2.6).
The Contractor should be required to calculate and guarantee the maximum momentary
pressure under load rejection from specified conditions (specified power and specified specific
hydraulic energy) and the most unfavourable transient conditions established by the Employer.
However, the Employer shall specify all relevant data because of the involvement and influence
of the electrical generator, speed regulator, and waterway system in the transient phenomenon
(see 3.4.5).
3.5.6 Guaranteed maximum momentary overspeed
The maximum momentary overspeed is the overspeed attained under the most unfavourable
transient conditions. Under certain conditions, it may exceed maximum steady-state runaway
speed. The maximum momentary overspeed should be guaranteed by the Contractor.
However, the Employer shall specify all relevant data because of the involvement and influence
of the electrical generator, speed regulator, and waterway system in the transient phenomenon
(see 3.4.5).
3.5.7 Guaranteed maximum steady-state runaway speed
The specifications should require that Contractor guarantees the maximum steady-state
runaway speed under the worst combination of conditions established by the Employer, for
example, maximum specific hydraulic energy (head) and physical maximum guide vane
opening for propeller turbines and worst off-cam condition for Kaplan turbines considering
variations in the plant cavitation factor. Taking into consideration powerhouse arrangement,
number and type of independent shut-off devices, local or remote control and type of control
and protection systems, the specifications should state the duration for which the unit shall be
capable of functioning at maximum steady-state runaway speed. The duration may vary from a
few minutes to several hours at this speed, but the design of the plant should keep this
duration to a minimum. The guarantee should be stated in the technical data sheets submitted
by Tenderers.
– 16 – 61366-5 © IEC:1998(E)
NOTE – It is recommended not to specify or to conduct steady-state runaway speed tests at site. If it is mutually
agreed to conduct such tests, they should be performed at reduced specific hydraulic energy (head) refer to
IEC 60041. The purpose of this precaution is to reduce the physical stresses on the civil structures and the
generating unit (particularly the electrical machinery). The value of maximum steady-state runaway speed should be
verified by model tests (if any).
3.5.8 Cavitation pitting guarantees
Severe cavitation pitting creates three major problems for hydraulic machines; high
...