IEC 63132-5:2023

IEC 63132-5
®

Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Guidance for installation procedures and tolerances of hydroelectric machines –
Part 5: Bulb turbines and generators

Lignes directrices des procédures et tolérances d’installation des machines
hydroélectriques –
Partie 5: Turbines et alternateurs de type bulbe

IEC 63132-5:2023-04(en-fr)

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IEC 63132-5

®


Edition 1.0 2023-04




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Guidance for installation procedures and tolerances of hydroelectric machines –

Part 5: Bulb turbines and generators



Lignes directrices des procédures et tolérances d’installation des machines

hydroélectriques –

Partie 5: Turbines et alternateurs de type bulbe















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 27.140 ISBN 978-2-8322-6742-4




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 63132-5:2023  IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Installation flowchart . 6
4.1 Turbine and generator embedded parts. 6
4.2 Turbine and generator mechanical parts . 7
5 Steps . 9
5.1 Turbine and generator embedded parts. 9
5.1.1 Step 1: Benchmarks set-up . 9
5.1.2 Step 2: Powerhouse primary stage concrete with anchor plates and
embedded pipes . 9
5.1.3 Step 3: Anchor plates, embedded pipes and workspace verification . 9
5.1.4 Step 4: Handing over to installation . 10
5.1.5 Step 5: Draft tube installation. 10
5.1.6 Step 6: Secondary embedded pipes installation around the draft tube . 12
5.1.7 Step 7: Handing over to concreting phase. 12
5.1.8 Step 8: Draft tube embedment . 13
5.1.9 Step 9: Concrete voids testing . 13
5.1.10 Step 10: Draft tube grout injection . 14
5.1.11 Step 11: Handing over to installation . 14
5.1.12 Step 12: Draft tube dimensional inspection after embedment . 14
5.1.13 Step 13: Installation of turbine housing . 15
5.1.14 Step 14: Installation of pier nose liner . 17
5.1.15 Step 15: Installation of generator foundation base . 17
5.1.16 Step 16: Installation of generator hatch cover frame . 18
5.1.17 Step 17: Secondary embedded pipes installation around the turbine
housing. 18
5.1.18 Step 18: Handing over to concreting phase . 18
5.1.19 Step 19: Embedment of turbine housing, pier nose, generator
foundation base plate and hatch cover frame . 18
5.1.20 Step 20: Handing over to installation . 19
5.1.21 Step 21: Corrosion protection for embedded parts . 19
5.1.22 Step 22: Turbine and generator embedded parts complete . 19
5.1.23 Step 23: Turbine and generator mechanical parts installation . 19
5.2 Turbine and generator mechanical parts . 20
5.2.1 Step 1: Turbine and generator embedded parts complete . 20
5.2.2 Step 2: Handing over to installation . 20
5.2.3 Step 3: Dimensional inspection of turbine housing after embedment . 20
5.2.4 Step 4-1: Distributor assembly . 20
5.2.5 Step 4: Distributor installation . 21
5.2.6 Step 5: Lowering and storing of lower half of discharge ring . 21
5.2.7 Step 6-1: Pre-assembly of shaft and bearings . 21
5.2.8 Step 6: Shaft installation . 21
5.2.9 Step 7: Shaft free . 22
5.2.10 Step 8: Combined bearing installation . 23
5.2.11 Step 9: Guide vane servomotor and counterweight installation . 23

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IEC 63132-5:2023  IEC 2023 – 3 –
5.2.12 Step 10-1: Turbine runner assembly . 24
5.2.13 Step 10: Runner installation . 24
5.2.14 Step 11: Guide vane apparatus final adjustment . 25
5.2.15 Step 12: Lowering and storing of bulb nose . 26
5.2.16 Step 13-1: Rotor assembly . 26
5.2.17 Step 13: Rotor installation . 27
5.2.18 Step 14: Discharge ring installation . 27
5.2.19 Step 15: Shaft alignment . 28
5.2.20 Step 16-1: Stator assembly . 29
5.2.21 Step 16: Stator installation . 29
5.2.22 Step 17: Shaft seal installation . 30
5.2.23 Step 18: Runner blade operating pipes installation . 30
5.2.24 Step 19: Runner oil supply head and extension shaft installation . 30
5.2.25 Step 20: Runner cone installation . 31
5.2.26 Step 21: Bulb nose installation . 31
5.2.27 Step 22: Generator supports installation . 31
5.2.28 Step 23: Access shaft installation and hatch cover closing . 31
5.2.29 Step 24: Remaining turbine parts installation completion . 32
5.2.30 Step 25: Final installation and cabling generator . 32
5.2.31 Step 26: Generator auxiliary systems installation . 32
5.2.32 Step 27: Turbine auxiliary systems installation . 33
5.2.33 Step 28: Cleaning, painting and inspection before initial tests . 33
5.2.34 Step 29: Turbine and generator mechanical parts complete . 33
5.2.35 Step 30: Commissioning . 33
Bibliography . 34

Figure 1 – Generic installation flowchart – Bulb turbine and generator embedded parts . 7
Figure 2 – Generic installation flowchart – Bulb turbine and generator mechanical parts . 8
Figure 3 – Draft tube liner installation . 12
Figure 4 – Draft tube liner embedment plan . 13
Figure 5 – Radial tilting of turbine housing flange. 16
Figure 6 – Turbine housing installation . 17
Figure 7 – Shaft free . 23
Figure 8 – Guide vane apparatus final adjustment . 26
Figure 9 – Discharge ring installation . 28

Table 1 – Draft tube installation tolerances . 11
Table 2 – Turbine housing installation tolerances . 15
Table 3 – Shaft free verifications. 22
Table 4 – Guide vane apparatus adjustment tolerances . 25
Table 5 – Discharge ring measurement . 28
Table 6 – Stator installation measurement . 29

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– 4 – IEC 63132-5:2023  IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

GUIDANCE FOR INSTALLATION PROCEDURES AND
TOLERANCES OF HYDROELECTRIC MACHINES –

Part 5: Bulb turbines and generators

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
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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interested IEC National Committees.
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6) All users should ensure that they have the latest edition of this publication.
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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.
IEC 63132-5 has been prepared by IEC technical committee 4: Hydraulic turbines. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
4/456/FDIS 4/462/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

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IEC 63132-5:2023  IEC 2023 – 5 –
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63132 series, published under the general title Guidance for
installation procedures and tolerances of hydroelectric machines, 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 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.

IMPORTANT – The "colour inside" logo on the cover page of this document 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.

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– 6 – IEC 63132-5:2023  IEC 2023
GUIDANCE FOR INSTALLATION PROCEDURES AND
TOLERANCES OF HYDROELECTRIC MACHINES –

Part 5: Bulb turbines and generators



1 Scope
The purpose of this document is to establish, in a general way, suitable procedures and
tolerances for the installation of bulb turbine and generator. This document presents a typical
assembly and whenever the words “turbine” and “generator” are used in this part, it refers to
bulb turbine and generator. There are many possible ways to assemble a unit. The size of the
machine, the design of the machine, the layout of the powerhouse, the sequence of concreting
or the delivery schedule of the components are some of the elements that could result in
additional steps, or the elimination of some steps and/or assembly sequences.
It is understood that a publication of this type will be binding only if, and to the extent that, both
contracting parties have agreed upon it.
The document excludes matters of purely commercial interest, except those inextricably bound
up with the conduct of installation. It also excludes specifications of the civil works but this
aspect of the work should be taken into consideration during the assembly of the units.
Wherever the document specifies that documents, drawings or information are supplied by a
manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate
information for their own supply only.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
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
4 Installation flowchart
4.1 Turbine and generator embedded parts
Figure 1 shows a generic installation flowchart for bulb turbine and generator embedded parts.

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IEC 63132-5:2023  IEC 2023 – 7 –

Figure 1 – Generic installation flowchart –
Bulb turbine and generator embedded parts
4.2 Turbine and generator mechanical parts
Figure 2 shows generic installation flowchart for bulb turbine and generator mechanical parts.

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– 8 – IEC 63132-5:2023  IEC 2023

Figure 2 – Generic installation flowchart – Bulb turbine and generator mechanical parts

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IEC 63132-5:2023  IEC 2023 – 9 –
5 Steps
5.1 Turbine and generator embedded parts
5.1.1 Step 1: Benchmarks set-up
a) Objective of work in the step
– Set-up benchmarks to be used for starting proper installation of the turbine and
generator.
b) Explanation of work
– Sufficient benchmarks should be provided to establish the unit centreline, axis and
elevation.
c) Recommendations
N/A
d) Additional information
Depending on the project delivery system (EPC, design build, etc.), the benchmarks or their
reference points could be provided by the owner, civil contractor, etc. Whoever provides the
benchmarks or reference points is responsible to make sure they are correct.
The benchmark type (x, y, z coordinates, definition of the axis and elevations, etc.) should be
agreed to before the beginning of the work.
The turbine supplier should take care to transfer the necessary benchmarks throughout the
erection and/or concreting processes so that the benchmarks remain accessible as the unit is
assembled.
5.1.2 Step 2: Powerhouse primary stage concrete with anchor plates and embedded
pipes
a) Objective of work in the step
– Install primary embedded pipes, anchor plates and steel foundations in the correct
locations.
b) Explanation of work
– Install the primary embedded pipes and supporting systems.
– Install the foundation components of the draft tube liner, servomotor, stay columns and
pier nose.
c) Recommendations
Different designs require different tolerances; therefore, it is recommended that the turbine
supplier should provide the tolerances. It is considered as a best practice to perform:
– Non-destructive tests as applicable (i.e. visual inspections, pressure tests of the piping,
test of welding seams).
– Measures to prevent the concrete from entering the pipes or contaminating the machined
surfaces of foundations during concreting.
d) Additional information
The contract should define which party is responsible to install the primary embedded pipes
and/or the foundation components of draft tube liner, servomotor, stay columns and pier nose.
5.1.3 Step 3: Anchor plates, embedded pipes and workspace verification
a) Objective of work in the step
– Confirm that the foundation components of draft tube liner, servomotor, stay columns
and pier nose have been installed in the correct place. Verify that the shape of concreted
area is per the design and there is sufficient access to the workplace.

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– 10 – IEC 63132-5:2023  IEC 2023
b) Explanation of work
– Ensure that the dimensions of the shape of concreted area match the design.
– Ensure that there will be no interference between the concrete structures, the reinforcing
steels, the scaffolding, etc. and the foundation components of draft tube liner,
servomotor, stay columns and pier nose.
– Once the workplace is acceptable, the turbine and generator installation work can start.
c) Recommendations
It is recommended to check that the foundation components of the draft tube liner,
servomotor, stay columns and pier nose and the primary embedded pipes were installed
within the tolerances provided by the turbine and generator supplier.
d) Additional information
N/A
5.1.4 Step 4: Handing over to installation
a) Objective of work in the step
– The work space is transferred to the turbine and generator supplier.
b) Explanation of work
– There is normally an official transfer of the working area from the civil contractor to the
turbine and generator supplier. The transfer is typically documented with some type of
signed form.
c) Recommendations
N/A
d) Additional information
N/A
5.1.5 Step 5: Draft tube installation
a) Objective of work in the step
– Install the draft tube (see Figure 3).
b) Explanation of work
– Transportation of the draft tube flange and the draft tube liner segments to the foundation
and placing them on the foundation plates.
– Tack-welding of the draft tube flange and the draft tube liner segments.
– Inspection of the alignment and principal dimensions of the draft tube flange and the
draft tube liner before welding.
– Welding of the draft tube flange and the draft tube liner.
– Inspection of alignment and measurement of principal dimensions of the draft tube flange
and the draft tube liner after welding.
c) Recommendations
The items showed in Table 1 should be checked.

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IEC 63132-5:2023  IEC 2023 – 11 –
Table 1 – Draft tube installation tolerances
Item Tolerance Minimum number of Measurement location
measurements
Difference between the
outlet end of the draft
To be determined by
Junction tube liner and the inlet of
8
turbine supplier
the concrete portion of
the draft tube.
2 for each side
To be determined by Elevation of inlet and
Elevation
turbine supplier outlet
(Left and right)
8 when RD < 4m
To be determined by
Flatness Flatness of inlet flange
turbine supplier
16 when RD ≥ 4m
2
To be determined by Vertical inclination of inlet
Vertical Inclination
turbine supplier flange
(Top and bottom)
2
To be determined by Horizontal inclination of
Horizontal Inclination
turbine supplier inlet flange
(Left and right)
To be determined by
Orientation 1 Orientation of inlet flange
turbine supplier
Concentricity of both inlet
To be determined by 4 at both inlet flange and
Concentricity flange and outlet end to
turbine supplier outlet end
centre line
To be determined by 8 at both inlet flange and Circularity of both inlet
Circularity
turbine supplier outlet end flange and outlet end
Axial position of inlet
To be determined by
Axial position 1 flange to turbine centre
turbine supplier
line

– Non-destructive tests of the welding seams.
– Proper fixation of the draft tube.
d) Additional information
The sequence for the installation of the draft tube flange and the draft tube liner should be
provided by the turbine supplier.
If the downstream concrete portion of the draft tube cannot be completed prior to the
installation of the draft tube liner, the outlet position of the draft tube liner cannot be
determined by the junc
...